# OmniPackage documentation

> Reference, guides, and CLI docs for OmniPackage — build signed RPM and DEB packages for multiple Linux distros from one YAML config.

OmniPackage is a CLI that drives standard Linux packaging tools (rpmbuild, debuild, createrepo_c, dpkg-scanpackages, gpg, podman/docker) from a single YAML config, so one project repo can ship signed RPM and DEB packages to many distros from a single `release` command.

# Getting started

# OmniPackage documentation

Reference and guides for **OmniPackage**, a CLI for building and publishing signed RPM, DEB, and pacman packages to many Linux distributions from one YAML config. For the project overview, see [omnipackage.org](https://omnipackage.org/).

## Where to start

- [Getting started](https://docs.omnipackage.org/getting_started/index.md) — install the CLI and ship the bundled C example end-to-end.
- [How it works](https://docs.omnipackage.org/guides/how_it_works/index.md) — what `omnipackage release` does, step by step.
- [Configuration](https://docs.omnipackage.org/configuration/index.md) — every key in `.omnipackage/config.yml`.
- [CLI reference](https://docs.omnipackage.org/cli/index.md) — every subcommand and flag.

## 30-second example

```sh
omnipackage init .
echo "GPG_KEY=$(omnipackage gpg generate --name 'Your Name' --email you@example.com --format base64)" >> .env
# edit .omnipackage/config.yml — point repositories: at your bucket
omnipackage release .
```

Full walkthrough: [Getting started](https://docs.omnipackage.org/getting_started/index.md).

## Real-world projects

- [`olegantonyan/mpz`](https://github.com/olegantonyan/mpz) — Qt desktop music player. 36 build targets, Qt5/Qt6 split via YAML anchors, per-distro CMake flags, R2 with Cloudflare cache purges.
- [`omnipackage/omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs) — OmniPackage built with itself. `before_build_script` installs a current Rust toolchain on older distros; newer ones use distro-packaged Rust. Dual GHCR caches cover org and contributor-fork workflows.
- [`omnipackage/examples`](https://github.com/omnipackage/examples) — minimal one-per-language templates (C, C++, CMake, Rust, Go, Python, Ruby, Crystal, Electron, Tauri).

See [Examples](https://docs.omnipackage.org/examples/index.md) for details.

## Links

- [omnipackage.org](https://omnipackage.org/) — project landing page
- [GitHub](https://github.com/omnipackage/omnipackage-rs) — source, issues, releases
- Install OmniPackage — apt / dnf / zypper / pacman one-liners: [x86_64](https://repositories.omnipackage.org/omnipackage-rs/stable/install.html) · [aarch64](https://repositories.omnipackage.org/omnipackage-rs/stable-aarch64/install.html)

# Getting started

Install the CLI and build the bundled C example end-to-end.

## Install the CLI

Options:

1. OmniPackage repositories — recommended: [x86_64](https://repositories.omnipackage.org/omnipackage-rs/stable/install.html) · [aarch64](https://repositories.omnipackage.org/omnipackage-rs/stable-aarch64/install.html)
1. [AUR](https://aur.archlinux.org/packages/omnipackage) — Arch alternative, e.g. `yay -S omnipackage`
1. [Source](https://github.com/omnipackage/omnipackage-rs/) — requires Rust 1.95+

Verify:

```text
omnipackage --version
```

Prints `omnipackage <version>` if the binary is on `$PATH`.

## Build the example project

Clone the [examples repo](https://github.com/omnipackage/examples) and enter the C/Makefile sample:

```text
git clone https://github.com/omnipackage/examples.git && cd examples/c_makefile
```

Generate a GPG signing key. To reuse an existing one, see [Signing packages](https://docs.omnipackage.org/guides/signing/index.md).

```text
echo "GPG_KEY=$(omnipackage gpg generate --name 'Your Name' --email 'you@example.com' --format base64)" >> .env
```

The key is ASCII-armored, then base64-encoded so it fits in an env variable without newline escaping.

OmniPackage reads `.env` from the project root by default; override with `--env-file`. `.env` now holds your private signing key — keep it out of version control (the examples repo already gitignores it).

Run `release` (`.` is the project directory containing `.omnipackage/config.yml`):

```text
omnipackage release .
```

The build log streams for each distro in `.omnipackage/config.yml`.

The command writes local repositories to `~/omnipackage-examples-repos/c_makefile`. Open `install.html` there in a browser for copy-paste install instructions per distro. The directory also holds `install.sh`, which detects the machine's distro and installs in one step, and `install.json` with the same data for automation (see [Install page](https://docs.omnipackage.org/guides/install_page/index.md)). The path comes from the `repositories` block in `.omnipackage/config.yml`; the first entry is used by default.

## Next steps

### Switch to S3 for production

Local repositories are for testing; production usually means S3. The example config already includes an S3 block. Select it by name:

```text
omnipackage release . --repository "Example bucket"
```

### How secrets flow

Secrets are declared in `config.yml` and passed from the environment via `${...}`. `config.yml` declares what is needed; `.env` (or any env file, or the process environment) holds the values. There are no hidden env settings.
# Guides

# How it works

A high-level walkthrough of what happens during `omnipackage release`. This page is conceptual — it explains the model, not the flags.

## What it is

OmniPackage is a thin wrapper over existing Linux packaging infrastructure. `rpmbuild`, `debuild`, `makepkg`, `createrepo_c`, `dpkg-scanpackages`, `repo-add`, `gpg`, container runtimes (`podman` / `docker`), `apt` / `dnf` / `zypper` / `pacman` — none of it is reinvented. OmniPackage drives these tools in the right order, per distro, with sensible defaults, so one project repo can ship signed packages to many distros from one config file.

The motivation is on [About](https://omnipackage.org/about): native Linux packaging works well for distro maintainers, but it is a steep climb for individual developers who want their users to `apt install` their software. OmniPackage closes that gap on both sides — developer UX (one config, one command) and user UX (a generated install page with four copy-paste commands).

## Two flows, one pipeline

There's a developer-side flow and a user-side flow. The pipeline produces both.

```
flowchart TD
  src["source repo"] -->|init| cfg["omnipackage config"]
  cfg -->|release| build["per-distro container build"]
  build -->|sign| pkg["signed package"]
  pkg -->|publish| repo["signed repo on S3"]
  repo --> page["generated install page"]
  page --> install["users install"]
```

### Developer side

1. **Scaffold** *(optional)* — `omnipackage init` detects the project type from marker files (`Cargo.toml`, `go.mod`, `CMakeLists.txt`, `pyproject.toml`, …) and renders a starter `.omnipackage/config.yml` plus per-format template files (RPM `.spec.liquid`, `debian/` directory, pacman `PKGBUILD.liquid`). The generated templates are starting points, not finished configs: expect to edit `config.yml`, the spec, and the `debian/` files to match what your project builds and ships. Skip this step if you would rather hand-write the config from one of the [examples](https://docs.omnipackage.org/examples/index.md).

1. **Release** — `omnipackage release` reads the config and, for each configured distro:

   - Pulls the distro container image (`opensuse/leap:16.0`, `fedora:42`, `debian:trixie`, `archlinux:latest`, etc.).
   - Runs the distro's own setup commands inside the container — `zypper install ...`, `apt-get install build-essential debhelper ...`, `dnf install rpmdevtools ...`, `pacman -Syu base-devel ...`. These are not OmniPackage code; they are verbatim distro-native shell commands.
   - Renders the `.spec` (RPM), `debian/` (DEB), or `PKGBUILD` (pacman) templates with project and distro variables via Liquid, then invokes the distro's native build tool (`rpmbuild`, `debuild`, `makepkg`).
   - Signs the resulting `.rpm` / `.deb` / `.pkg.tar.zst` with the configured GPG key. The same key signs packages and repo metadata.
   - Builds repo metadata with the distro-native tool — `createrepo_c` for RPM, `dpkg-scanpackages` for DEB, `repo-add` for pacman.
   - Uploads the signed packages and metadata to S3 (or any S3-compatible store: R2, GCS, B2, MinIO; see [`s3_repository`](https://docs.omnipackage.org/guides/s3_repository/index.md)).
   - Generates the [install page](https://docs.omnipackage.org/guides/install_page/index.md) (`install.html`) and, next to it, `install.sh` — a one-line installer that auto-detects the user's distro — and `install.json`, the same per-distro data in machine-readable form for automation.

`omnipackage prime` is separate from this flow: it pre-runs the distro setup commands and snapshots the container image to a registry, so later releases skip the slow `apt-get install build-essential` phase. See [`image_caches`](https://docs.omnipackage.org/configuration/image_caches/index.md).

`omnipackage` runs anywhere a container runtime does (laptop, VPS, any CI). A common setup is free end-to-end: GitHub Actions is free for public repositories, and Cloudflare R2, Backblaze B2, and Google Cloud Storage have free tiers that cover small-to-mid projects.

### User side

What ends up at `<bucket_public_url>/<path_in_bucket>/install.html` is what a real end user sees:

- For DEB-family distros, four lines: add the apt source, import the GPG key, `apt-get update`, `apt-get install <package>`.
- For RPM-family distros, the equivalent `dnf` / `zypper` flow.
- For pacman distros (Arch, Manjaro), import the key with `pacman-key`, add the repo `Server` to `/etc/pacman.conf`, then `pacman -Sy <package>`.

Users who would rather not pick their distro by hand can run the one-line installer instead. It detects the distro from `/etc/os-release`, checks the CPU architecture, and runs the matching steps:

```text
curl -fsSL <bucket_public_url>/<path_in_bucket>/install.sh | sh
```

Add `-y` to skip the confirmation prompt, or `--distro <id>` to override detection. `install.json` next to it exposes the same per-distro data — download URLs, GPG public key, install commands — as a machine-readable array for automation.

After install, users receive updates through their distro's normal `apt upgrade` / `dnf upgrade` / `zypper update` / `pacman -Syu`. No opt-in updater, no Electron tray icon, no separate channel. The repo is a normal signed repo served over HTTPS.

## What it does not do

- Build other package formats. RPM, DEB, and pacman only. Flatpak/Snap/AppImage/Nix are a different approach — see [About](https://omnipackage.org/about) for why. (OmniPackage builds pacman packages into its own signed repo; it does not publish to the AUR.)
- Host your repository. You bring the bucket. The trade-off: no vendor lock-in, and your packages live in storage you control.
- Sandbox installed software. Packages run with the same privileges any `apt install` package gets — no Flatpak-style isolation unless you ship it as part of your package (an AppArmor / SELinux profile, a `bwrap` / `firejail` wrapper around your binary).

# Signing packages

OmniPackage signs every published `.deb` / `.rpm` / `.pkg.tar.zst` and the repository metadata (`Release` / `InRelease` for DEB, `repomd.xml` for RPM, the signed `.db.tar.gz` database plus a detached `.sig` per package for pacman) with a GPG private key. End users import the matching public key once when they add the repository; `apt` / `dnf` / `zypper` / `pacman` reject any package or metadata file whose signature does not verify. The key is what makes a published repository trustable.

The key is referenced from `config.yml` as base64-wrapped ASCII armor, normally via `${GPG_KEY}` — substituted from a `.env` file (project root by default, override with `--env-file <path>`) or from the process environment.

```yaml
repositories:
  - name: my-repo
    provider: s3
    gpg_private_key_base64: "${GPG_KEY}"
    # ...
```

The rest of this page covers producing that `GPG_KEY` value — generated fresh, exported from your existing GPG keyring, or converted between formats.

Keep the key secret and back it up

The private key is the trust anchor for your repository. Treat it like any other production secret — never commit it, restrict access, and keep at least one backup somewhere safe (password manager, encrypted offline storage). **If you lose it, you cannot sign updates with the same key.** Signing future releases with a *new* key causes every user's `apt` / `dnf` / `zypper` to reject the updates with a signature-mismatch error; they will have to manually import the new public key (or remove and re-add the repository) before updates resume.

## Generate a new key

```sh
omnipackage gpg generate --name "Your Name" --email you@example.com --format base64
```

This prints a single base64 line to stdout — append it to `.env`:

```sh
echo "GPG_KEY=$(omnipackage gpg generate --name 'Your Name' --email you@example.com --format base64)" >> .env
```

What the command does:

- Generates an RSA 4096-bit keypair with no expiration date.
- Sets no passphrase: the build runs unattended, with no interactive prompt.
- Prints only the private key. The public key is derived from it on every publish, so you do not need to track them separately.
- Runs in a temporary, isolated `GNUPGHOME`; your real `~/.gnupg` is never touched.

The same key signs packages and repo metadata for the lifetime of the repository — rotating it forces every existing user to re-import the new public key, so generate once and keep the `.env` value safe.

## Use an existing key

To reuse an existing GPG key, export it from your keyring and feed it through `omnipackage gpg convert`.

### 1. Find the key ID

```sh
gpg --list-secret-keys --keyid-format=long
```

Note the `sec` line's key ID — the long hex after `rsa<bits>/`.

### 2. Remove the passphrase, if any

OmniPackage cannot use a passphrased key — there is no interactive prompt during a build. Strip the passphrase first:

```sh
gpg --edit-key <KEY_ID>
> passwd
# enter the current passphrase, then leave the new passphrase empty
> save
```

To keep your everyday key passphrased, **do not** do this on it — instead generate a dedicated unprotected signing subkey, or generate a fresh key with `omnipackage gpg generate` (above) and use it exclusively for package signing.

### 3. Export the private key as ASCII armor

```sh
gpg --armor --export-secret-keys <KEY_ID> > signing-key.asc
```

The result is a multi-line `-----BEGIN PGP PRIVATE KEY BLOCK-----` block.

### 4. Convert to base64 and put it in `.env`

```sh
echo "GPG_KEY=$(omnipackage gpg convert signing-key.asc)" >> .env
rm signing-key.asc
```

Delete `signing-key.asc` once it is in `.env` — no reason to keep two copies of the secret on disk.

## Convert between formats

`omnipackage gpg convert` round-trips between two key encodings:

| Format   | What it is                                                                  | Where it is used                                                               |
| -------- | --------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
| `pem`    | Plain ASCII armor (`-----BEGIN PGP PRIVATE KEY BLOCK-----`...). Multi-line. | What `gpg --armor --export-secret-keys` produces; human-inspectable.           |
| `base64` | The PEM block, base64-encoded into one line of ASCII.                       | What `config.yml` expects in `gpg_private_key_base64`; what you put in `.env`. |

Why base64? ASCII-armored PGP keys contain newlines, and newlines do not survive `.env` files, GitHub Actions secrets (the multi-line case works but is fragile), or shell `export VAR=...`. Base64 collapses the whole thing into a single line of `[A-Za-z0-9+/=]`, which round-trips cleanly through every layer between your laptop and the build container.

```sh
# pem → base64 (typical: prepare for .env); pem in, base64 out are the defaults
omnipackage gpg convert signing-key.asc

# base64 → pem (typical: inspect or re-import)
omnipackage gpg convert key.b64 --input-format base64 --output-format pem | gpg --import

# stdin works too
cat signing-key.asc | omnipackage gpg convert --input-format pem --output-format base64
```

The conversion is loss-free: decoding the base64 form yields exactly the original ASCII-armored block.

# Publishing to S3

End-to-end walkthrough for turning an S3 bucket (or any S3-compatible storage) into a public DEB/RPM/pacman repository.

**Cloudflare R2 is recommended** if you have no preference: it is the most-tested provider here, egress is free (so serving packages costs nothing), and it includes 10 GB of free storage.

## AWS S3

### 1. Create the bucket

S3 console → **Create bucket**. Pick a region (e.g. `eu-central-1`) and a globally-unique name. Leave "Block all public access" on for now — step 3 turns the right parts of it off.

### 2. Create an IAM user with access keys

Access keys come from **IAM**, not S3. Do not use the root account.

1. IAM → **Users** → **Create user** (e.g. `omnipackage-publisher`). Programmatic access only, no console login.

1. Attach an inline policy scoped to this single bucket:

   ```json
   {
     "Version": "2012-10-17",
     "Statement": [
       {
         "Effect": "Allow",
         "Action": ["s3:ListBucket", "s3:GetBucketLocation"],
         "Resource": "arn:aws:s3:::<bucket-name>"
       },
       {
         "Effect": "Allow",
         "Action": ["s3:PutObject", "s3:GetObject", "s3:DeleteObject", "s3:AbortMultipartUpload"],
         "Resource": "arn:aws:s3:::<bucket-name>/*"
       }
     ]
   }
   ```

1. **Security credentials** → **Create access key** → "Application running outside AWS". Copy both into your env file as `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` — the secret is shown only once and cannot be retrieved later.

From GitHub Actions, prefer OIDC with an IAM role over static keys.

### 3. Make objects publicly readable

S3 buckets are private by default behind two independent gates; both must allow public reads.

**Block Public Access (BPA)** — bucket-level master switch. **Permissions** → **Block public access (bucket settings)** → Edit. Uncheck:

- "Block public access to buckets and objects granted through *new* public bucket or access point policies"
- "Block public access to buckets and objects granted through *any* public bucket or access point policies"

Leave the two ACL boxes checked — modern buckets use policies, not ACLs.

**Bucket policy** — the actual grant. Same Permissions tab → **Bucket policy** → Edit:

```json
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "PublicReadGetObject",
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::<bucket-name>/*"
    }
  ]
}
```

The `Resource` ARN ends in `/*` (objects), not the bare bucket. With both gates in place, objects are reachable at `https://<bucket-name>.s3.<region>.amazonaws.com/<key>`.

### 4. Repository config

```yaml
- name: AWS S3 eu-central-1
  provider: s3
  gpg_private_key_base64: "${GPG_PRIVATE_KEY_BASE64}"
  package_name: "sample-project"
  s3:
    bucket: omnipackage-repositories-891377066957-eu-central-1-an
    path_in_bucket: "sample-project"
    bucket_public_url: "https://omnipackage-repositories-891377066957-eu-central-1-an.s3.eu-central-1.amazonaws.com"
    endpoint: "https://s3.eu-central-1.amazonaws.com"
    access_key_id: "${AWS_ACCESS_KEY_ID}"
    secret_access_key: "${AWS_SECRET_ACCESS_KEY}"
    region: eu-central-1
    force_path_style: false
```

Field notes:

- `bucket_public_url` — virtual-hosted REST endpoint (`https://<bucket>.s3.<region>.amazonaws.com`). Serves HTTPS once the bucket policy is in place. Do not use the `s3-website` endpoint (HTTP-only).
- `endpoint` — regional S3 API endpoint, e.g. `https://s3.eu-central-1.amazonaws.com`.
- `region` — actual AWS region. AWS requires it for SigV4 (R2 uses `auto`; AWS does not).
- `force_path_style: false` — AWS uses virtual-hosted-style; path-style is deprecated.

### 5. Troubleshooting

`AccessDenied` on the public URL almost always means:

1. **BPA still blocking the policy.** Permissions tab should show "Public" once both BPA and the policy are correct.
1. **Bucket policy missing `/*`** on the resource ARN, or wrong bucket name.
1. **Object doesn't exist.** Verify with `aws s3 ls s3://<bucket>/<prefix>/`. AWS returns `AccessDenied` instead of `NoSuchKey` when `s3:ListBucket` isn't granted, masking missing objects.

## Cloudflare R2

R2 is S3-compatible with a few quirks.

### 1. Create the bucket

Cloudflare dashboard → **R2** → **Create bucket**. R2 names are scoped to your account, not globally unique.

### 2. Make it public via a custom subdomain

R2 does not expose a public `*.r2.cloudflarestorage.com` URL — that endpoint is API-only and requires signed requests. Public access requires a **custom subdomain** under a Cloudflare-managed zone:

Bucket → **Settings** → **Public access** → **Custom Domains** → **Connect Domain** → enter e.g. `repositories-test.omnipackage.org`. Cloudflare provisions DNS and TLS automatically.

The `r2.dev` subdomain is rate-limited and meant for development; do not use it for a real repo.

### 3. Create R2 API credentials

R2 dashboard → **Manage R2 API Tokens** → **Create API token**. Permissions: **Object Read & Write**, scoped to the bucket. Cloudflare returns an Access Key ID, Secret Access Key, and the S3 API endpoint (`https://<account-id>.r2.cloudflarestorage.com`).

### 4. Repository config

```yaml
- name: test repo on Cloudflare R2
  provider: s3
  gpg_private_key_base64: "${GPG_PRIVATE_KEY_BASE64}"
  package_name: "sample-project"
  s3:
    bucket: repositories-test
    path_in_bucket: "sample-project"
    bucket_public_url: "https://repositories-test.omnipackage.org"
    endpoint: "${CLOUDFLARE_R2_ENDPOINT}"
    access_key_id: "${CLOUDFLARE_R2_ACCESS_KEY_ID}"
    secret_access_key: "${CLOUDFLARE_R2_SECRET_ACCESS_KEY}"
    region: auto
    force_path_style: true
    # Optional — see "CDN cache purge" below
    cloudflare_zone_id: "${CLOUDFLARE_ZONE_ID}"
    cloudflare_api_token: "${CLOUDFLARE_API_TOKEN}"
```

Field notes:

- `bucket_public_url` — your custom subdomain. Must be the public-facing host, **not** the R2 API endpoint.
- `endpoint` — the R2 S3 API endpoint, account-scoped. Used only for uploads.
- `region: auto` — R2 ignores region; SigV4 still needs *some* value, and `auto` is what Cloudflare documents.
- `force_path_style: true` — required. R2's endpoint is account-scoped, so the bucket goes in the path.

### 5. CDN cache purge (optional)

Custom-subdomain R2 traffic flows through Cloudflare's edge, which caches `GET` responses. Without purging, stale repo metadata (`Release`, `Packages.gz`, `repodata/`, the pacman `.db.tar.gz`) can be served until TTL expires.

If both `cloudflare_zone_id` and `cloudflare_api_token` are set, OmniPackage purges the affected URL prefix after each upload. They are treated as a pair — if either is missing, the purge step is skipped silently. A purge failure logs a warning but does not fail the publish.

To get them:

- **Zone ID** — Cloudflare dashboard → your domain → **Overview** sidebar (right side).
- **API token** — **My Profile** → **API Tokens** → **Create Token** → custom token with **Zone → Cache Purge → Purge** scoped to the zone. Do not use the global API key.

Skip if you can tolerate edge TTL on repo updates.

## Google Cloud Storage

GCS speaks an S3-compatible API.

### 1. Create the bucket

Console → **Cloud Storage** → **Buckets** → **+ Create**. Names are globally unique. Set **Access control = Uniform bucket-level access**.

### 2. Service account + HMAC keys

GCS authenticates the S3 API with **HMAC keys**, not JSON service-account files. Bind the key to a dedicated service account so it can be rotated independently.

1. **IAM & Admin** → **Service Accounts** → create `omnipackage-publisher`.
1. Bucket → **Permissions** → **Grant access**. Principal = service account email; role = **Storage Object Admin**.
1. **Cloud Storage** → **Settings** → **Interoperability** → **+ Create a key for a service account** → pick the publisher SA.
1. Copy the access key and secret into your env file as `GCS_HMAC_ACCESS_KEY_ID` and `GCS_HMAC_SECRET_ACCESS_KEY`.

### 3. Make objects publicly readable

- **Public access prevention** (Configuration tab) → **Off**.
- **Permissions** → **Grant access**: principal `allUsers`, role **Storage Object Viewer**.

The bucket header then shows a "Public to internet" badge.

### 4. Repository config

```yaml
- name: GCS europe-southwest1
  provider: s3
  gpg_private_key_base64: "${GPG_PRIVATE_KEY_BASE64}"
  package_name: "sample-project"
  s3:
    bucket: omnipackage-repos
    path_in_bucket: "sample-project"
    bucket_public_url: "https://storage.googleapis.com/omnipackage-repos"
    endpoint: "https://storage.googleapis.com"
    access_key_id: "${GCS_HMAC_ACCESS_KEY_ID}"
    secret_access_key: "${GCS_HMAC_SECRET_ACCESS_KEY}"
    region: europe-southwest1
    force_path_style: true
```

Field notes:

- `bucket_public_url` — path-style. Do not use virtual-hosted (`<bucket>.storage.googleapis.com`).
- `endpoint` — single global endpoint; no regional variant.
- `region` — must match the bucket's actual location. SigV4 is region-bound; do not use `auto`.
- `force_path_style: true` — required; virtual-hosted style trips signature mismatches.

### 5. Cache and custom domains

GCS serves public objects with `Cache-Control: public, max-age=3600` by default, so republished repo metadata can be stale for up to an hour. Override the bucket-default `Cache-Control` or set per-object headers if that matters.

GCS cannot serve a custom domain over HTTPS on its own. Either put a Google HTTPS Load Balancer with a backend bucket in front, or front it with Cloudflare — in the Cloudflare case the `cloudflare_zone_id` / `cloudflare_api_token` fields are useful for cache purges, same as the R2 setup.

# Publishing to a local directory

S3 is not mandatory. The `localfs` provider writes the same signed repository tree to a directory on the host instead of uploading it to a bucket. The output is a standard DEB/RPM/pacman repository, identical to what an S3 target produces.

Use it to:

- inspect exactly what `publish` generates,
- install on the same machine without any server,
- self-host behind a web server or shared mount you already run.

## Configuration

```yaml
- name: Local
  provider: localfs
  gpg_private_key_base64: "${GPG_KEY}"
  package_name: "sample-project"
  localfs:
    path: "${HOME}/sample-project-repo"
```

`path` is the only `localfs` key. Environment placeholders such as `${HOME}` are expanded from the [env file](https://docs.omnipackage.org/configuration/secrets/index.md). The directory is created if it does not exist.

## What gets written

Each distro lands in its own subdirectory named by [distro id](https://docs.omnipackage.org/distros/index.md), with the package, the signed native repo metadata, and the public key. The generated [install page](https://docs.omnipackage.org/guides/install_page/index.md) and its sibling files sit at the root:

```text
sample-project-repo/
├── install.html      # human-facing install page
├── install.sh        # one-line installer, detects the distro
├── install.json      # per-distro data, machine-readable
├── badge.svg         # repo status badge
├── fedora_42/
│   ├── sample-project.repo
│   ├── repodata/
│   └── sample-project-1.0-1.x86_64.rpm
├── debian_12/
│   └── stable/
│       ├── Release
│       ├── Release.key
│       ├── Packages.gz
│       └── sample-project_1.0_amd64.deb
└── arch/
    ├── public.key
    ├── sample-project.db.tar.gz
    └── sample-project-1.0-1-x86_64.pkg.tar.zst
```

## Inspect and install locally

Open `install.html` in a browser for the per-distro install snippets, or run `install.sh` to detect the distro and install in one step; `install.json` carries the same data for scripts. Because `localfs` has no public URL, the snippets point at `path` on disk, so they work as-is for installing on the same machine.

## Self-hosting

The directory is a complete, standard repository. To serve it over the network, point any static web server (nginx, Caddy, `python -m http.server`) at `path`, or place it on an NFS/SMB share. Package managers consume it like any other repo.

The generated `install.html` links use the on-disk `path`, not your server's URL, so for a networked repo give consumers the repository URL directly. For a turnkey public repo with a matching install page, an [S3-compatible backend](https://docs.omnipackage.org/guides/s3_repository/index.md) is simpler — including self-hosted MinIO, which speaks the same S3 API.

## Retention

[`retain_packages`](https://docs.omnipackage.org/configuration/repositories/#package-retention) works the same as for S3: each `publish`/`release` keeps the N most recent packages per distro plus the new build and prunes the rest from `path`.

# The install page

`publish` and `release` write four files to the repository root, next to the per-distro package trees: `install.html`, `install.sh`, `install.json`, and `badge.svg`. Each publish updates the published distro's entry and keeps the rest, so the files stay complete when distros are published one at a time, as in a [CI matrix](https://docs.omnipackage.org/guides/cicd/index.md).

`omnipackage info --show-install-page-url` prints the page URL (S3 repositories).

## `install.html`

A self-contained static page with install instructions for every published distro, grouped by family. Each entry holds copy-paste shell steps and the repository's GPG public key; the header offers a one-line `curl ... | sh` that runs `install.sh`. Light and dark themes, no external assets.

The page stores its data as JSON in a `<script type="application/json" id="data">` element; the next publish reads existing entries from it. A [custom template](#custom-install-page) must keep that element.

## `install.sh`

The POSIX installer behind the one-liner. It picks the distro id from `/etc/os-release`, refuses to run on a different CPU architecture than the packages were built for, asks for confirmation, and needs root (`sudo` when available).

| Flag            | Effect                                 |
| --------------- | -------------------------------------- |
| `-y`, `--yes`   | Skip the confirmation prompt           |
| `--distro <id>` | Skip autodetection, use this distro id |
| `-h`, `--help`  | Usage                                  |

## `install.json`

The same data for scripts: a JSON array with one object per distro.

| Field           | Meaning                                            |
| --------------- | -------------------------------------------------- |
| `distro_id`     | Distro id, e.g. `fedora_42`                        |
| `distro_name`   | Human-readable name                                |
| `distro_family` | Family used for grouping, e.g. Debian, Fedora      |
| `install_steps` | Install commands, one array element per shell line |
| `gpg_key`       | ASCII-armored public key                           |
| `download_url`  | Direct URL of the distro's latest package file     |
| `package_type`  | `rpm`, `deb`, or `pacman`                          |
| `arch`          | `x86_64` or `aarch64`                              |
| `package_name`  | From `config.yml`                                  |
| `timestamp`     | RFC 3339 time of that distro's last publish        |

## `badge.svg`

A shields-style badge: the repository `name` from `config.yml` on the left, distro counts per package format on the right (e.g. `12 RPM 8 DEB`). After an S3 publish, ready-to-paste badge markdown is printed in the log.

## Custom install page

`publish` and `release` accept `--custom-install-page <path>`: a [Liquid](https://shopify.github.io/liquid/) template that replaces the built-in page. Two rules:

- Keep a `<script type="application/json" id="data">` element. Publish stores the distro data there and reads it back on the next run; without it, previously published distros drop off the page.
- The template context is `package_name` plus any extra keys on the [repository entry](https://docs.omnipackage.org/configuration/repositories/index.md): a `homepage: https://myapp.example.com` line on the repository renders as `{{ homepage }}`.

Start from the built-in [`install.html.liquid`](https://github.com/omnipackage/omnipackage-rs/blob/master/src/publish/repo_files/install.html.liquid).

# Templates

OmniPackage renders the RPM `.spec` file, the DEB `debian/` control files, and the pacman `PKGBUILD` from [Liquid](https://shopify.github.io/liquid/) templates. This page covers the template context and how to feed per-distro values into one shared template.

## Why template

A working `.spec` file or `debian/control` is mostly boilerplate identical across distros in a family — same `%build` recipe, same `Source0`, same `Description`. The parts that differ are small: package dependency names (`qt6-base-common-devel` on openSUSE vs. `qt6-qtbase-devel` on Fedora), optional CMake flags (Qt5 vs. Qt6), occasional tool overrides (a different compiler on an older distro).

Without templating, you would carry a copy of the spec for every distro and watch them drift. With templating, one `.spec.liquid` and one `debian/` directory; everything that varies — names, version, maintainer, deps, custom flags — comes from `config.yml` per distro.

## Where templates live

In `config.yml`:

```yaml
rpm:
  spec_template: ".omnipackage/myapp.spec.liquid"

deb:
  debian_templates: ".omnipackage/deb"

pacman:
  pkgbuild_template: ".omnipackage/PKGBUILD.liquid"
```

- **RPM**: a single file ending in `.liquid`. The rendered output goes into the rpmbuild tree as the spec file.
- **DEB**: a directory. Every file inside ending in `.liquid` is rendered (the `.liquid` suffix is stripped: `control.liquid` → `control`). Files without `.liquid` are copied verbatim — useful for `compat`, license files, scripts, etc.
- **pacman**: a single file ending in `.liquid`. The rendered output is the `PKGBUILD` that `makepkg` builds (Arch, Manjaro) — a normal PKGBUILD with `build()` / `package()` functions.

A typical DEB tree contains `control.liquid`, `changelog.liquid`, `rules.liquid`, and `compat.liquid`. See the [`c_makefile` example](https://github.com/omnipackage/examples/tree/master/c_makefile/.omnipackage/deb) for a complete minimal set.

## Built-in variables

Every template renders with these in scope:

| Variable               | Type                     | Source                                                                                                                |
| ---------------------- | ------------------------ | --------------------------------------------------------------------------------------------------------------------- |
| `version`              | string                   | Output of the configured `version_extractor`                                                                          |
| `current_time_rfc2822` | string                   | Render-time timestamp; used in `debian/changelog`                                                                     |
| `package_name`         | string                   | From the build entry in `config.yml`                                                                                  |
| `maintainer`           | string                   | From the build entry                                                                                                  |
| `homepage`             | string                   | From the build entry                                                                                                  |
| `description`          | string                   | From the build entry                                                                                                  |
| `build_dependencies`   | array of strings         | From the build entry                                                                                                  |
| `runtime_dependencies` | array of strings         | From the build entry                                                                                                  |
| `secrets`              | object (string → string) | From the `secrets:` block; access as `{{ secrets.MY_KEY }}`                                                           |
| `source_folder_name`   | string                   | RPM and pacman — name of the staged source tarball directory (the pacman source is `{{ source_folder_name }}.tar.gz`) |

Arrays render with the Liquid `join` filter:

```liquid
BuildRequires: {{ build_dependencies | join: ' ' }}
Requires: {{ runtime_dependencies | join: ', ' }}
```

(RPM uses spaces, DEB uses `,` — the templates choose, not the engine.)

## Custom per-distro variables

Any field on a build entry in `config.yml` beyond the known keys above is passed straight into the template context with the same name. This is the mechanism for per-distro variation.

Example from [`mpz`](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/config.yml) — same Qt-based project compiled against Qt5 or Qt6 depending on the distro:

```yaml
debian_qt5: &debian_qt5
  build_dependencies: [gcc, make, cmake, qtbase5-dev, qtmultimedia5-dev]
  CMAKE_EXTRA_CLI: "-DUSE_QT5=ON"
  <<: *deb

debian_qt6: &debian_qt6
  build_dependencies: [gcc, make, cmake, qt6-base-dev, qt6-multimedia-dev]
  <<: *deb

builds:
  - distro: "debian_12"
    <<: *debian_qt5
  - distro: "debian_13"
    <<: *debian_qt6
```

Then in the [shared spec / rules templates](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/deb/rules.liquid):

```liquid
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr {{ CMAKE_EXTRA_CLI }} ..
```

For Qt5 distros this expands to `... -DUSE_QT5=ON ..`; for Qt6 distros it expands to `... ..` (the extra space is harmless to `cmake`). One template, two distro flavors, no fork.

Custom values can be strings, integers, floats, or booleans — whatever YAML produces. They are addressed by the same key used in YAML.

## Liquid basics

- `{{ var }}` — substitute a value.
- `{{ var | filter }}` — apply a filter (`join`, `upcase`, `default`, `size`, etc.).
- `{% if cond %}...{% endif %}` — conditional block.
- `{% for x in arr %}...{% endfor %}` — loop.

Useful patterns:

```liquid
{% if runtime_dependencies.size > 0 %}
Requires: {{ runtime_dependencies | join: ', ' }}
{% endif %}
```

```liquid
{{ secrets.SENTRY_DSN | default: "" }}
```

## Undefined variables render as empty

Referencing a variable that was not set anywhere does **not** error — it renders as an empty string (and evaluates as falsy in `{% if %}`). This is deliberate, so a custom variable like `CMAKE_EXTRA_CLI` can be set on some distros and omitted on others without conditional guards in the template.

The flip side: typos render silently. If a value is not appearing where you expect, double-check the spelling in both `config.yml` and the template.

# Build recipes

OmniPackage builds each package in a clean per-distro container. Most projects need only `build_dependencies` filled in (see [builds](https://docs.omnipackage.org/configuration/builds/index.md)); the patterns below cover the cases that need more — Qt/CMake quirks, Electron apps, and Arch. To match a specific error message to a fix, see [Troubleshooting](https://docs.omnipackage.org/guides/troubleshooting/index.md).

## CMake and Qt

- **Make install rules unconditional.** If a project gates its `install()` rules behind an AppImage/qmake flag, lift them into an always-on `if(UNIX AND NOT APPLE)` block so packaging works without that flag. Install the binary, `.desktop` file, icons, and the AppStream `metainfo` (upstream often forgets the last one).

- **Exclude bundled-library artifacts with a component.** Bundled deps (e.g. Qt-Advanced-Docking-System) ship their own `install()` rules — headers, a static lib, cmake config — which land in the buildroot and trigger rpm's *"Installed (but unpackaged) files"* error. Tag your own rules and install only that component:

  ```sh
  # rpm  %install
  DESTDIR=%{buildroot} cmake --install _build --component myapp
  # debian/rules
  DESTDIR=$(CURDIR)/debian/<pkg> cmake --install _build --component myapp
  ```

- **On deb, drive `cmake` directly — not `dh_auto_configure`.** `dh_auto_configure` forces `-DFETCHCONTENT_FULLY_DISCONNECTED=ON`, which blocks CPM/FetchContent from downloading bundled deps, so the fetched targets never exist and `target_link_libraries` fails. Drive cmake yourself in `debian/rules` (recipes are **TAB**-indented):

  ```makefile
  %:
      dh $@
  override_dh_auto_configure:
      cmake -S . -B _build -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr
  override_dh_auto_build:
      cmake --build _build --parallel
  override_dh_auto_test:
  override_dh_auto_install:
      DESTDIR=$(CURDIR)/debian/{{ package_name }} cmake --install _build --component myapp
  ```

- **Initialize submodules first.** OmniPackage stages the working tree with rsync, so uninitialized submodules ship empty and the build can't find the subproject. Run `git submodule update --init --recursive` before building — `--recursive` matters for nested submodules.

- **Relocate hardcoded `DESTINATION lib` for lib64 distros.** A project that installs libs to a literal `lib` puts them in `/usr/lib` even on Fedora/openSUSE/EL/Mageia, where the loader looks in `/usr/lib64`, so at runtime the app can't find its own private libs. Fix in the spec `%install` (Debian's `/usr/lib` is correct, so guard on it):

  ```sh
  if [ "%{_libdir}" != "/usr/lib" ] && [ -d %{buildroot}/usr/lib ]; then
    mkdir -p %{buildroot}%{_libdir}; mv %{buildroot}/usr/lib/* %{buildroot}%{_libdir}/; fi
  ```

- **Nudge deb for private / no-SONAME libs.** Internal shared libs with no version (`libfoo.so`) carry no shlibs entry, so `dpkg-shlibdeps` reports *no dependency information found*. Add an override; rpm self-satisfies via basename Provides/Requires:

  ```makefile
  override_dh_shlibdeps:
      dh_shlibdeps -l$(DESTROOT)/usr/lib -- --ignore-missing-info
  ```

- **QML modules and the SVG plugin aren't auto-detected.** They're dlopened, not linked, so list them in `runtime_dependencies` — see the [QML map](#qt6-dependencies) below.

Tip

Working references: [`mpz`](https://github.com/olegantonyan/mpz/tree/master/.omnipackage) and [`rssguard`](https://github.com/olegantonyan/rssguard/tree/master/.omnipackage).

## Qt6 dependencies

Package names diverge per distro **family** — this is the main reason for per-family anchors. For a Qt6/CMake app using Core, Gui, Widgets, Network and PrintSupport (all in qtbase) plus **Core5Compat** and **LinguistTools**, and needing **GuiPrivate** (e.g. for a bundled docking system):

| Need                                             | Fedora / RHEL              | openSUSE                                 | Debian / Ubuntu                    |
| ------------------------------------------------ | -------------------------- | ---------------------------------------- | ---------------------------------- |
| compiler + build tools                           | `gcc-c++ cmake make git`   | `gcc-c++ cmake make git`                 | `build-essential cmake git`        |
| Qt6 base (Core/Gui/Widgets/Network/PrintSupport) | `qt6-qtbase-devel`         | `qt6-base-devel`                         | `qt6-base-dev`                     |
| Qt6 **private** headers (GuiPrivate)             | `qt6-qtbase-private-devel` | `qt6-base-private-devel`                 | `qt6-base-private-dev`             |
| Core5Compat                                      | `qt6-qt5compat-devel`      | `qt6-qt5compat-devel`                    | `qt6-5compat-dev`                  |
| LinguistTools (lrelease)                         | `qt6-qttools-devel`        | `qt6-tools-devel` + `qt6-linguist-devel` | `qt6-tools-dev` + `qt6-l10n-tools` |
| OpenGL dev                                       | `mesa-libGL-devel`         | `Mesa-libGL-devel`                       | `libgl-dev`                        |

On **AlmaLinux/Rocky**, Qt6 lives in EPEL/CRB, which aren't on the base image and install *after* `build_dependencies`. Pull them in `before_build_script` instead:

```yaml
el_rpm: &el_rpm
  <<: *common
  build_dependencies: [gcc-c++, cmake, make, git]
  before_build_script: >-
    dnf install -y epel-release &&
    dnf install -y --nobest --enablerepo=crb
    qt6-qtbase-devel qt6-qtbase-private-devel qt6-qttools-devel qt6-qt5compat-devel mesa-libGL-devel
  rpm: { spec_template: ".omnipackage/specfile.spec.liquid" }
```

### Runtime QML modules

A QML app dlopens its imported modules and the SVG imageformat plugin at runtime, so they must be explicit `runtime_dependencies`:

| Import / need                                                             | Fedora / RHEL                                                                   | openSUSE                                                                                     | Debian / Ubuntu                                                                                                                                                                                                                     |
| ------------------------------------------------------------------------- | ------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| QtQuick, QtQml, Layouts, Shapes, Controls, Dialogs, Templates, Qt.labs.\* | `qt6-qtdeclarative` *(usually auto-pulled by the linked `libQt6Quick6` soname)* | **`qt6-declarative-imports`** *(separate package,* *not* *pulled by the soname — must list)* | one `qml6-module-*` per import: `qml6-module-qtquick`, `-qtquick-controls`, `-qtquick-dialogs`, `-qtquick-layouts`, `-qtquick-shapes`, `-qtcore`, `-qt-labs-platform`, `-qt-labs-qmlmodels`, `-qtqml-models`, `-qtqml-workerscript` |
| SVG imageformat plugin (SVG icons)                                        | `qt6-qtsvg`                                                                     | `libQt6Svg6` *(ships the plugin)*                                                            | `qt6-svg-plugins` *(not `libqt6svg6`, which is only the lib)*                                                                                                                                                                       |

Warning

On openSUSE the whole QtQuick/Controls import tree lives in `qt6-declarative-imports`, which the linked-soname deps do **not** pull — omit it and the app starts with `module "QtQuick" is not installed`. A missing module only shows at runtime, so confirm the real set with the smoke-test in [Verifying a built package](#verifying-a-built-package).

## Patching staged source

Sometimes the build needs a source change the repo doesn't have — a missing QML import, an extra `install()` rule, a stale flag — and you can't or shouldn't commit it. Patch the **staged** copy at build time: the change lives entirely in `.omnipackage/`, and the committed tree stays pristine.

Put an **idempotent** script in `.omnipackage/` (guard every edit so re-runs are no-ops) and call it from both formats — the rpm `%prep` (after `%setup`) and the deb `override_dh_auto_configure` (before configure):

```sh
# .omnipackage/patch-qml.sh — inject a private-module import that went fully
# private in QtQuick.Controls.impl in Qt 6.11 (harmless on older Qt).
set -eu
for f in $(grep -rlE '\bIconImage\b' src --include='*.qml' 2>/dev/null || true); do
  grep -q 'QtQuick\.Controls\.impl' "$f" || sed -i '/^import QtQuick\.Controls$/a import QtQuick.Controls.impl' "$f"
done
```

```spec
%prep
%setup -q -n {{ source_folder_name }}
sh .omnipackage/patch-qml.sh
```

```makefile
override_dh_auto_configure:
    sh .omnipackage/patch-qml.sh
    dh_auto_configure -- -DCMAKE_BUILD_TYPE=Release
```

`.omnipackage/` is part of the staged tree, so the script is present in-container at the source root. The same trick installs an upstream-forgotten file straight from the spec/`rules` (`install -Dm644 foo.metainfo.xml %{buildroot}%{_datadir}/metainfo/…`).

## Electron and Node

`init` detects `package.json` → electron. The whole build runs inside a shared `install.sh` called from the rpm `%install` and the deb `override_dh_auto_install` (the spec `%build` stays empty). It provisions Node, runs the JS build, runs `electron-builder --linux dir`, and stages `dist_electron/linux-unpacked/` into `/opt/<pkg>/`, writing the `.desktop` file, icons, and the `/usr/bin/<pkg>` launcher itself. Reference: [`pulsar`](https://github.com/olegantonyan/pulsar/tree/master/.omnipackage).

Provision the toolchain in `before_build_script` (runs in the source root):

```sh
# node-gyp needs a modern python3:
mkdir -p /usr/local/bin
for py in /usr/bin/python3.13 /usr/bin/python3.12 /usr/bin/python3.11; do
  [ -x "$py" ] && { ln -sf "$py" /usr/local/bin/python3; break; }
done
# gcc >= 11 where the default is older (needs gcc-NN / g++-NN in build_dependencies):
for v in 15 14 13 12 11; do
  if [ -x "/usr/bin/g++-$v" ]; then
    ln -sf /usr/bin/gcc-$v /usr/local/bin/gcc; ln -sf /usr/bin/gcc-$v /usr/local/bin/cc
    ln -sf /usr/bin/g++-$v /usr/local/bin/g++; ln -sf /usr/bin/g++-$v /usr/local/bin/c++; break
  fi
done
# nvm via curl (NOT wget — see the openSUSE TW gotcha in Troubleshooting):
export NVM_DIR=/nvm PROFILE=/profile; mkdir -p "$NVM_DIR"; touch "$PROFILE"
nvm --version || { curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.2/install.sh | bash; source "$PROFILE"; }
```

Build and stage in `install.sh` (`$1` = buildroot, `$2` = package name):

```sh
source /profile
nvm install; corepack enable; nvm use     # Node from .nvmrc, yarn from packageManager
export HUSKY=0                             # husky's git hooks fail (.git is stripped)
yarn install                              # runs electron-builder install-app-deps
yarn <build>
( cd <app> && yarn electron-builder --linux dir --publish never )
mkdir -p "$1/opt/$2"; cp -a <app>/dist_electron/linux-unpacked/. "$1/opt/$2/"
# prune foreign/musl prebuilts — keep only this build's linux+arch:
U="$1/opt/$2/resources/app.asar.unpacked/node_modules"
case "$(uname -m)" in x86_64) drop=arm64;; aarch64) drop=x64;; *) drop=;; esac
find "$U" -depth ! -path '*/src/*' \( -iname '*darwin*' -o -iname '*win32*' -o -iname '*-musl*' \) -exec rm -rf {} +
[ -n "$drop" ] && find "$U" -depth -iname "*linux-$drop*" -exec rm -rf {} +
mkdir -p "$1/usr/bin"; ln -sf "/opt/$2/$2" "$1/usr/bin/$2"   # launcher symlink
```

The spec carries a few defines so rpm doesn't strip or shlibdep the prebuilt bundle:

```spec
%undefine __brp_mangle_shebangs                       # bundled node_modules use versionless shebangs
%define debug_package %{nil}
%define __os_install_post %{nil}                       # don't strip bundled/foreign-arch binaries
%global __requires_exclude ^.+\\.so\\(\\)\\(64bit\\)$   # drop unversioned bundled-soname Requires
```

The deb rules drive `install.sh` and disable strip/shlibdeps (TAB-indented):

```makefile
override_dh_auto_install:
    $(CURDIR)/.omnipackage/install.sh $(CURDIR)/debian/{{ package_name }} {{ package_name }}
override_dh_strip:
override_dh_shlibdeps:
```

deb runtime deps are explicit (shlibdeps is off) — the Electron desktop libs, with t64 alternations for newer releases: `"libgtk-3-0t64 | libgtk-3-0"`, `"libatspi2.0-0t64 | libatspi2.0-0"`, plus `libnotify4 libnss3 libxss1 libxtst6 libuuid1 libsecret-1-0 xdg-utils`. rpm auto-detects the versioned system libs.

Note

Toolchain floor: **glibc ≥ 2.28** (Node 22 prebuilt) and **gcc ≥ 11** (C++20 `<source_location>`). EL8 (gcc-toolset needs `scl enable`) and pre-gcc11 Debian/Ubuntu can't build without a hack — drop them.

## pacman and Arch

`arch` and `manjaro` build the one `PKGBUILD.liquid` with `makepkg` (OmniPackage runs it as an unprivileged `omnibuild` user — nothing to configure). It's a normal PKGBUILD, Liquid-rendered:

```bash
pkgname={{ package_name }}
pkgver={{ version }}                  # makepkg forbids `-`; 0.99~master.<ts>.<hash> is fine
pkgrel=1
pkgdesc="{{ description }}"
arch=("$(uname -m)")                  # never hardcode x86_64 — makepkg sources this
url="{{ homepage }}"
{% if runtime_dependencies.size > 0 %}depends=({{ runtime_dependencies | join: ' ' }}){% endif %}
options=('!lto')                      # only if it links prebuilt C/asm (aws-lc-rs, ring)
source=("{{ source_folder_name }}.tar.gz")
sha256sums=('SKIP')                   # local staged tarball — nothing remote to verify

build()   { cd "$srcdir/{{ source_folder_name }}"; <compile>; }
package() { cd "$srcdir/{{ source_folder_name }}"; <install into $pkgdir>; }
```

- **`build_dependencies` are Arch names**; `base-devel` (gcc/make/…) is preinstalled. makepkg runs `--nodeps`, so these — not the PKGBUILD's `depends`/`makedepends` — install the toolchain. No `before_build_script` is needed (rust/go/crystal+shards/python+python-pip/ruby are all in the official repos).
- **install.sh-based types** (python/ruby/electron): `package()` just runs the shared `.omnipackage/install.sh "$pkgdir"` — no `build()`, no `!lto`.
- **Output:** `<name>-<ver>-<rel>-<arch>.pkg.tar.zst` + detached `.sig`; the signed repo db is `<project_slug>.db.tar.gz`.

## Verifying a built package

A successful build isn't proof the package installs and runs. Build one rpm and one deb, then inspect the contents and the auto-detected dependencies. The build host is often **not** Debian, so read the `.deb` with `ar`+`tar` rather than `dpkg`:

```sh
# RPM
rpm -qlp pkg.rpm     # files — expect only your paths, no bundled-lib headers/.a/cmake
rpm -qpR pkg.rpm     # Requires — expect auto-detected libs (Qt6, libc, libstdc++, …)
rpm -qip pkg.rpm     # name / version / license / summary

# DEB without dpkg (match the data member's extension: .xz/.zst/.gz)
m=$(ar t pkg.deb | grep '^data.tar')
ar p pkg.deb "$m" | xz -dc | tar -tf -                          # file list
ar p pkg.deb "$(ar t pkg.deb | grep '^control.tar')" | xz -dc | tar -xO ./control   # Depends/Description

# pacman (.pkg.tar.zst — zstd-aware tar, no pacman needed)
tar -xOf pkg.pkg.tar.zst .PKGINFO    # pkgname/pkgver/arch/depends
tar -tf  pkg.pkg.tar.zst             # files (ignore the .PKGINFO/.BUILDINFO/.MTREE dotfiles)
```

Static inspection misses **runtime** gaps — a dlopened QML module or plugin that isn't a dependency. For GUI apps, smoke-test the real package in a throwaway container: install it (pulling deps) and run it headless.

```sh
# DEB (apt resolves deps from a local file with the leading ./)
podman run --rm -v "$DEB":/p.deb:ro,Z debian:13 bash -c \
  'apt-get update -qq && apt-get install -y ./p.deb && QT_QPA_PLATFORM=offscreen timeout 6 myapp 2>&1 | grep -i "not a type\|not installed" && echo BROKEN || echo OK'
```

See also [Best practices → Test the installed package](https://docs.omnipackage.org/guides/best_practices/#test-the-installed-package-not-just-the-build) and [`omnipackage portal`](https://docs.omnipackage.org/cli/portal/index.md).

# CI/CD integration

Running `omnipackage release` from CI so every push, tag, or other trigger produces signed packages.

## GitHub Actions

A suggested setup, adapted from [`mpz`](https://github.com/olegantonyan/mpz). The reference workflows in [`mpz/.github/workflows`](https://github.com/olegantonyan/mpz/tree/master/.github/workflows) are four files:

| File                            | Trigger                    | Purpose                                  |
| ------------------------------- | -------------------------- | ---------------------------------------- |
| `_omnipackage.yml`              | `workflow_call`            | Reusable release pipeline                |
| `omnipackage-next.yml`          | Push to `master`           | Rolling **next** channel                 |
| `omnipackage-stable.yml`        | GitHub `release` published | **Stable** channel from a tagged release |
| `refresh-omnipackage-cache.yml` | Monthly cron + manual      | Re-primes the container image cache      |

When-to-release lives in the trigger wrappers; how-to-release lives in the shared workflow. The two channels differ only in which `repositories:` entry they publish to and which `version_extractor` they use.

The split (dev packages on every push to `master`, stable packages on each tagged release) is optional: a single workflow publishing to a single `repositories:` entry works just as well. Drop the wrapper you do not need.

### Installing the CLI

Every job needs the `omnipackage` binary. Preferred — the GitHub Action:

```yaml
- uses: omnipackage/omnipackage-rs@stable   # @master for master builds
```

Ubuntu runners only; CPU architecture (x86_64 / aarch64) auto-detected. The channel comes from the pinned ref: `@master` installs the master channel; any other ref, including a version tag, installs the latest stable. The action has one output, `version`. The workflows below use this.

Alternative — add the apt repository directly. Use it on non-GitHub CI, or to pin an exact channel:

```yaml
- name: Install omnipackage
  run: |
    echo 'deb https://repositories.omnipackage.org/omnipackage-rs/master/ubuntu_24.04 stable/' | sudo tee /etc/apt/sources.list.d/omnipackage_omnipackage.list
    curl -fsSL https://repositories.omnipackage.org/omnipackage-rs/master/ubuntu_24.04/stable/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/omnipackage_omnipackage.gpg > /dev/null
    sudo apt-get update
    sudo apt-get install omnipackage
```

### The shared workflow

`_omnipackage.yml` takes two inputs and runs two jobs:

```yaml
on:
  workflow_call:
    inputs:
      repository:
        required: true
        type: string
      version_extractor:
        required: true
        type: string

jobs:
  list-distros:
    runs-on: ubuntu-24.04
    outputs:
      distros: ${{ steps.get-distros.outputs.distros }}
    steps:
      - uses: omnipackage/omnipackage-rs@stable
      - uses: actions/checkout@v6
      - id: get-distros
        run: echo "distros=$(omnipackage info --list-distros . --format json)" >> "$GITHUB_OUTPUT"

  release:
    needs: [list-distros]
    runs-on: ubuntu-24.04
    concurrency:
      group: omnipackage-${{ inputs.repository }}-${{ matrix.distro }}
      cancel-in-progress: false
    strategy:
      fail-fast: false
      matrix:
        distro: ${{ fromJson(needs.list-distros.outputs.distros) }}
    steps:
      - uses: omnipackage/omnipackage-rs@stable
      - uses: actions/checkout@v6
      - run: echo "${{ secrets.OMNIPACKAGE_DOTENV }}" > .env
      - run: omnipackage release . --build-dir $RUNNER_TEMP --repository "${{ inputs.repository }}" --distros "${{ matrix.distro }}" --version-extractor "${{ inputs.version_extractor }}" --image-cache github
```

Field notes:

- `list-distros` emits a JSON array of distro IDs that `fromJson()` expands into the `release` matrix. Adding a build target to `config.yml` widens the matrix automatically.
- `concurrency.group` keyed on `(repository, distro)` with `cancel-in-progress: false` queues same-channel runs instead of racing — concurrent writers corrupt repo metadata (`Release`, `Packages.gz`, `repodata/`).
- `fail-fast: false` lets one distro's failure leave the other distros' packages published.
- `--image-cache github` references the `image_caches:` entry below.

### Stable vs next triggers

Two thin wrappers pick *when* and *which channel*.

**Next** — `omnipackage-next.yml`. Every push to `master`:

```yaml
name: Release packages - next

on:
  workflow_dispatch:
  push:
    branches: [master]

jobs:
  run:
    uses: ./.github/workflows/_omnipackage.yml
    secrets: inherit
    with:
      repository: "Linux packages - next"
      version_extractor: "git"
```

`version_extractor: "git"` derives a unique, monotonic version from the commit. Swap `push:` for `workflow_run:` to publish only from green CI commits.

**Stable** — `omnipackage-stable.yml`. Only when a GitHub release is published:

```yaml
name: Release packages - stable

on:
  workflow_dispatch:
  release:
    types: [published]

jobs:
  run:
    uses: ./.github/workflows/_omnipackage.yml
    secrets: inherit
    with:
      repository: "Linux packages - stable"
      version_extractor: "stable"
```

Drafts and pre-releases do not trigger. `version_extractor: "stable"` reads the version from the GitHub release tag — see [version_extractors](https://docs.omnipackage.org/configuration/version_extractors/index.md) for alternatives. Both wrappers also accept `workflow_dispatch` for re-runs without retagging.

`secrets: inherit` is required — without it, `OMNIPACKAGE_DOTENV` is not visible to the called workflow.

### Image cache priming

Without a primed cache, every release rebuilds each per-distro container from scratch (minutes per distro). With a cache, `build` starts from a registry pull.

`refresh-omnipackage-cache.yml` re-primes monthly and on demand. Same `list-distros` job; the second job swaps `release` for `prime`:

```yaml
on:
  workflow_dispatch:
  schedule:
    - cron: '44 6 1 * *'

permissions:
  packages: write

jobs:
  # list-distros: same as _omnipackage.yml

  image_cache:
    needs: [list-distros]
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        distro: ${{ fromJson(needs.list-distros.outputs.distros) }}
    steps:
      - uses: omnipackage/omnipackage-rs@stable
      - uses: actions/checkout@v6
      - run: echo "${{ secrets.OMNIPACKAGE_DOTENV }}" > .env
      - run: omnipackage prime . --image-cache github --distros "${{ matrix.distro }}"
```

- `permissions: packages: write` lets `GITHUB_TOKEN` push images to GHCR (the default is read-only).
- `cron: '44 6 1 * *'` runs 06:44 UTC on the 1st of each month — off-the-hour minutes avoid scheduler throttling.
- Re-prime when distro base images receive security updates, the `setup` script changes, or the toolchain in `setup` changes. The monthly cron catches the first; trigger manually for the others.

The matching `image_caches:` entry:

```yaml
image_caches:
  - name: github
    provider: registry
    image_tag: omnipackage-cache
    registry:
      url: ghcr.io
      namespace: ${GITHUB_REGISTRY_NAMESPACE}
      username: ${GITHUB_REGISTRY_USERNAME}
      password: ${GITHUB_REGISTRY_PASSWORD}
```

The three `GITHUB_REGISTRY_*` env vars come from the `.env` blob.

### Secrets

`OMNIPACKAGE_DOTENV` is a convenience: paste the entire local `.env` into one multi-line GitHub Actions secret, write it back verbatim in CI, and rotate in one place. The plain pattern (one secret per env var, exposed via `env:` on the step) works equally well; the two can be mixed.

`.env` lives in `$GITHUB_WORKSPACE`, is discarded with the runner, is not uploaded as an artifact, and is not visible to the build container unless `config.yml` explicitly maps it.

# Best practices

Conventions that make OmniPackage-built packages behave well on the distros they target. None are enforced by the tool — they are guidance from production packaging.

## Add one repo, install works

The user-facing contract: **a user adds your OmniPackage repository and nothing else, and `apt install <your-package>` / `dnf install <your-package>` resolves cleanly, every runtime dependency satisfied from the repositories the distro ships with.** No extra PPAs, no Copr, no third-party repos, no manual `.deb` downloads for a transitive dependency.

That contract is what keeps the generated `install.html` a four-line snippet instead of a small howto. Everything else on this page follows from it.

## One project per repository

Host a single project per OmniPackage repository. The generated install flow assumes it, and the user experience falls apart otherwise.

`install.html` ends in `apt install <your-package>` — one package, no ambiguity. Stacking unrelated projects into one bucket breaks that in one of two ways:

- **Non-overlapping audiences.** Users who add your repo see package names they do not recognise. Every `apt search` hit becomes "what is this, and why is it on my system?" — the trust signal of a focused repo is gone.
- **Overlapping audiences.** Users installing more than one of your projects hit a duplicate-source warning unless the install page for project B detects that project A's repo is already configured and skips the add step. Doing that portably across `apt` / `dnf` / `zypper` / `pacman` is extra shell logic the install snippet does not currently carry.

"Add this repo, then pick from the list" may come in a future release; until then, keep one project per repository. The bucket itself can be shared: use a distinct [`path_in_bucket`](https://docs.omnipackage.org/configuration/repositories/index.md) per project to isolate each repo tree. Separate buckets work too but are not required.

Some users prefer to avoid multiple third-party repos on their system. But the trust decision is per-source, not per-package, and the system-side cost of three small focused repos is about the same as one large one.

## Runtime dependencies must come from the distro's standard repos

Every package in `runtime_dependencies` — and every shared library the binary links at run time — must resolve from the distro's default repositories: `main`/`universe` on Debian and Ubuntu, the default repos on Fedora, openSUSE, AlmaLinux, Rocky, and so on. Those are the repositories every install of the distro already has configured.

This is a feature, not a constraint. A dependency on `libssl` or `qt6-base` resolves instantly, picks up security updates through `apt upgrade` / `dnf upgrade`, and adds nothing to your package's disk footprint.

Two consequences:

- **Pick library versions available across your distro matrix.** If you list `qt6` on a distro that only ships `qt5`, the package will not install. The fix is to narrow the supported distros or carry a per-distro variant via [per-distro custom variables](https://docs.omnipackage.org/guides/templates/#custom-per-distro-variables); [`mpz`](https://github.com/olegantonyan/mpz) builds Qt5 on older distros and Qt6 on newer ones. Distro lifetimes filter further — no point working around a version that only exists on an EOL release.
- **Do not bundle what the distro already ships.** Vendoring a copy of `libcurl` or `zlib` when the distro provides one wastes space, pins you to whatever version you bundled, and means a CVE in that library is not patched until *you* cut a new release.

## When a dependency isn't available, static-link it

OmniPackage is not a distro. You publish your own repository, maintain only your own packages, and nobody downstream is recompiling against your shared libraries. That changes the rules.

Distro packaging policies (Debian Policy, Fedora Packaging Guidelines, openSUSE's, and others) generally forbid bundled or statically-linked third-party libraries and require everything to link against system shared libs. That rule exists because the distro maintains the entire dependency graph: one `libfoo` security update flows to every consumer at once. Bundled copies break that guarantee.

You do not ship into that graph. So the rule relaxes from a requirement to a recommendation: **prefer shared libraries when the distro has them; static-link when it does not.**

Where static linkage is the right call:

- **Library missing from one distro in your matrix.** Dropping Debian 12 because it does not ship a recent enough `libfmt` is a worse trade than statically linking `libfmt` into the one Debian 12 build. Everywhere else still uses the system shared library.
- **Library too old on one distro.** Same shape — your code needs `libfoo >= 11`, but Ubuntu 22.04 has `libfoo 9`. Static-link on Ubuntu 22.04 (and only there); use the shared `libfoo` everywhere else. See [`mpz`](https://github.com/olegantonyan/mpz) for the same pattern applied to Qt5/Qt6 build flags.
- **Languages that static-link by default.** Rust and Go produce static binaries against their own crates and packages as a matter of course. That is idiomatic and not worth fighting — only `libc` and a small set of system libs typically remain dynamic, and those *should* stay dynamic so they pick up distro security updates.

In practice this is a narrow exception, not a blanket policy. Most of the dependency list still points at distro-shipped packages; one or two libraries are static-linked on the specific distros that need it. If you find yourself static-linking *most* dependencies on *most* distros, that warrants a second look — usually the distro matrix is wrong, or the library choice is.

## `before_build_script` is for build-time tooling, not runtime deps

When a distro's compiler or toolchain is too old, use [`before_build_script`](https://docs.omnipackage.org/configuration/builds/index.md): a shell script that runs inside the build container before the package build, typically to install a newer toolchain. Pulling a current Rust via `rustup`, installing a recent Node via `nvm`, dropping in a newer CMake from upstream — all fine. [`omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs) does this on older distros and uses distro-packaged Rust on newer ones.

The key distinction: `before_build_script` provisions the **build environment**, not the **user's machine**. Anything it installs is discarded with the container after the build. The produced `.deb` / `.rpm` / `.pkg.tar.zst` must still satisfy the rule above — every runtime dependency must come from the distro's standard repositories.

So: use `before_build_script` freely for a modern toolchain. Do not use it to paper over a runtime dependency you cannot satisfy — that produces a package that builds and installs but fails to launch, because the build-time `libfoo` is not on the user's machine. If a runtime library is not in the distro's standard repos, static-link it (above) instead.

## Test the installed package, not just the build

`omnipackage release` succeeding means the package built and the repository signed cleanly. It does not mean the package *installs and runs* on a fresh system. Build hosts have headers, build tools, and prior dependency installations that production user machines do not. A package that depends on a `-devel` / `-dev` package by mistake, or that links a `before_build_script`-installed library, will build fine and fail on `apt install` (or at first launch) for the first user who tries it.

[`omnipackage portal`](https://docs.omnipackage.org/cli/portal/index.md) provides the right environment: an interactive root shell in the plain distro base image, no `setup` applied, container discarded on `exit`. Open one per distro, add your published repo, run `apt install <your-package>` (or `dnf install` / `zypper install` / `pacman -S`), then run the binary — the snippet from your generated `install.html` is what to paste. Do this at least once per distro before announcing a release.

## Trust is in the developer, not the channel

A question worth answering up-front when shipping a third-party repository: "why should a user trust me as the package provider?"

The trust decision is not about the distribution channel. Users trust *you*, the developer, or they do not. If they trust you, they will `cargo install`, `npm install`, `pip install`, run your `curl | sh`, or add your repo. If they do not, none of those work either.

OmniPackage changes nothing here. It is open source ([`omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs)) and only drives the standard Linux packaging tools: `rpmbuild`, `debuild`, `makepkg`, `gpg`, `createrepo_c`. What ends up inside the `.deb` / `.rpm` / `.pkg.tar.zst` is your code, your build script, your dependencies; the signing key is yours, the bucket is yours, the install page is generated from your config.

# Troubleshooting

Every package is built in a clean per-distro container, so problems that never appear in a local build surface here — missing distro packages, private headers, foreign-arch binaries. Match the message in your build log to a fix below. For the build patterns these fixes refer to, see [Build recipes](https://docs.omnipackage.org/guides/build_recipes/index.md).

## Dependencies and packaging

| Symptom in the build log                                                           | Cause                                                                                                                                                   | Fix                                                                                                                                                                                                                                                           |
| ---------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Failed to find required Qt component "…Private"`                                  | The project (or a bundled lib) uses Qt private headers; the base `*-devel` package omits them. Often only a warning locally.                            | Add the private-headers package to `build_dependencies` — see the [Qt6 map](https://docs.omnipackage.org/guides/build_recipes/#qt6-dependencies).                                                                                                             |
| `Installed (but unpackaged) file(s) found` (rpm)                                   | `cmake --install` ran a bundled library's own install rules (headers, `.a`, cmake config).                                                              | Install only your own [component](https://docs.omnipackage.org/guides/build_recipes/#cmake-and-qt): `cmake --install _build --component myapp`.                                                                                                               |
| deb: `missing find_package for IMPORTED target` / fetched targets absent           | `dh_auto_configure` forces `-DFETCHCONTENT_FULLY_DISCONNECTED=ON`, blocking CPM/FetchContent.                                                           | Drive `cmake` directly in `debian/rules` — see [CMake and Qt](https://docs.omnipackage.org/guides/build_recipes/#cmake-and-qt).                                                                                                                               |
| `No provider of '<pkg>'` (dnf/zypper) · `Unable to locate package` (apt)           | Wrong package name for that distro family.                                                                                                              | Look up the real name ([below](#finding-the-right-package-name)) and fix the family anchor.                                                                                                                                                                   |
| App can't load its own `libfoo.so` at runtime (Fedora/openSUSE/EL/Mageia)          | The project hardcodes `install(DESTINATION lib)`; libs land in `/usr/lib`, not the `lib64` loader path.                                                 | Relocate `/usr/lib/*` → `%{_libdir}` in the spec — see [CMake and Qt](https://docs.omnipackage.org/guides/build_recipes/#cmake-and-qt).                                                                                                                       |
| `dpkg-shlibdeps: no dependency information found for …/libfoo.so`                  | A private or unversioned internal lib has no shlibs entry.                                                                                              | Add `override_dh_shlibdeps:` with `--ignore-missing-info`; rpm needs nothing. See [CMake and Qt](https://docs.omnipackage.org/guides/build_recipes/#cmake-and-qt).                                                                                            |
| Runtime: `<Type> is not a type` · `module "QtQuick.X" is not installed` · blank UI | A dlopened QML module or the SVG plugin isn't a dependency (these aren't auto-detected), or the app uses a private module a newer Qt no longer exposes. | List the module in `runtime_dependencies` (see the [QML map](https://docs.omnipackage.org/guides/build_recipes/#qt6-dependencies)); if it's an app bug, [patch the staged source](https://docs.omnipackage.org/guides/build_recipes/#patching-staged-source). |
| Wrong or empty `version` in the package                                            | The version_extractor regex didn't match.                                                                                                               | The regex runs over the whole file — use one capture group and a unique prefix like `project(`. See [version_extractors](https://docs.omnipackage.org/configuration/version_extractors/index.md).                                                             |
| `add_subdirectory … does not contain a CMakeLists.txt`, empty `libs/<sub>`         | Git submodules weren't initialized; the working tree is staged verbatim.                                                                                | `git submodule update --init --recursive` before building (recursive matters for nested submodules).                                                                                                                                                          |
| `unzip: not found` (or another tool) mid-build, but local builds are fine          | A bundled dep's build step shells out to a helper present on one base image but not another.                                                            | Add the tool to `build_dependencies` for every family.                                                                                                                                                                                                        |
| Local `cmake`/`make` succeeds but the container build fails                        | The container lacks packages your machine has (private headers, newer Qt).                                                                              | Expected — always validate with a real `omnipackage build`, not a local configure.                                                                                                                                                                            |
| Build host reboots or processes are OOM-killed                                     | Concurrent builds and/or full `make -j`/`cmake --build --parallel` exhaust RAM (Qt is heavy).                                                           | Build one distro at a time locally; keep parallelism for CI.                                                                                                                                                                                                  |
| `dpkg: command not found` when inspecting a `.deb`                                 | The build host isn't Debian.                                                                                                                            | Read the `.deb` with `ar`+`tar` — see [Verifying a built package](https://docs.omnipackage.org/guides/build_recipes/#verifying-a-built-package).                                                                                                              |
| `bogus date in %changelog` (rpm)                                                   | The weekday doesn't match the date.                                                                                                                     | Use a real weekday (`date -d 2026-06-01 +%a`).                                                                                                                                                                                                                |
| Dependency install 404s on an end-of-life release                                  | Archived base-image repos no longer resolve.                                                                                                            | Drop EOL distros from `builds:`.                                                                                                                                                                                                                              |
| `mageia_cauldron`: metadata 404 on all mirrors                                     | Rolling-repo checksum desync — not your config.                                                                                                         | Retry later, or drop `mageia_cauldron`.                                                                                                                                                                                                                       |

## Electron and Node

| Symptom in the build log                                                           | Cause                                                                                                                                          | Fix                                                                                                                                                                                               |
| ---------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| openSUSE TW: `curl`/`wget`/`zypper` → `undefined symbol: ngtcp2_crypto_*`          | Listing `curl`/`wget` in `build_dependencies` upgraded `libcurl-mini4` to a skewed `libcurl4`, breaking every libcurl tool (including zypper). | Remove `curl`/`wget` from the openSUSE `build_dependencies`; the base image's curl already works for nvm.                                                                                         |
| rpm: `nothing provides 'libX.so()(64bit)'` (libffmpeg, libnss3, a musl `libc.so`…) | Bundled private libs are needed by **unversioned** soname with no Provides.                                                                    | Exclude them: `%global __requires_exclude ^.+\\.so\\(\\)\\(64bit\\)$` and prune foreign prebuilts. See [Electron and Node](https://docs.omnipackage.org/guides/build_recipes/#electron-and-node). |
| `__requires_exclude` strips real deps, or has no effect                            | The spec parser eats one backslash, so a single `\(` matches every soname.                                                                     | Use **double** backslashes: `\\.so\\(\\)`.                                                                                                                                                        |
| `/usr/bin/strip: Unable to recognise the format … arm64.node`                      | rpm's strip pass hit a foreign-arch prebuilt binary a dep bundles.                                                                             | `%define __os_install_post %{nil}` (rpm) / empty `override_dh_strip:` (deb); prune foreign prebuilts.                                                                                             |
| `fatal error: source_location: No such file or directory`                          | A native module needs C++20 `<source_location>` (libstdc++ ≥ gcc 11); the compiler is older.                                                   | Add a versioned gcc ≥ 11 and symlink it in `before_build_script`, or drop the distro.                                                                                                             |
| `unrecognized command line option '-std=gnu++20'`                                  | The default compiler is older than gcc 10.                                                                                                     | Same as above.                                                                                                                                                                                    |

## pacman and Arch

| Symptom in the build log                                                 | Cause                                                                        | Fix                                                                                                        |
| ------------------------------------------------------------------------ | ---------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------- |
| `undefined symbol: aws_lc_*_SHA512` and other prebuilt C/asm link errors | makepkg enables LTO by default, which can't link prebuilt objects.           | Add `options=('!lto')` to the PKGBUILD.                                                                    |
| `bundle: command not found` in `package()`                               | Arch's `ruby` ships no bundler executable.                                   | `gem install --user-install --no-document bundler` and add `$(ruby -e 'puts Gem.user_dir')/bin` to `PATH`. |
| Manjaro: `lib*.so.N: cannot open shared object` installing build deps    | A bare `pacman -Sy <pkg>` is a partial upgrade against a lagging base image. | Always `pacman -Syu`. OmniPackage's setup already does — this only bites in your own pacman commands.      |

## Finding the right package name

When a build aborts at dependency install, the package name is wrong for that family. Open a shell in the plain base image and search:

```sh
omnipackage portal opensuse_tumbleweed   # zypper se -s qt6 | grep -i 5compat
omnipackage portal fedora_42             # dnf provides '*/Qt6GuiPrivateConfig.cmake'
omnipackage portal debian_13             # apt-get update && apt-cache search qt6-.*private
omnipackage portal arch                  # pacman -Ss qt6   (base-devel is preinstalled)
```

Note

Family names diverge in surprising ways. openSUSE's Core5Compat package is `qt6-qt5compat-devel` (same as Fedora), **not** `qt6-core5compat-devel`.

The full per-family Qt6 list is in [Build recipes → Qt6 dependencies](https://docs.omnipackage.org/guides/build_recipes/#qt6-dependencies).
# Configuration

# Configuration

OmniPackage reads `.omnipackage/config.yml` from the project root. This section documents every top-level key.

## Top-level keys

| Key                                                                                              | Required | Purpose                                                   |
| ------------------------------------------------------------------------------------------------ | -------- | --------------------------------------------------------- |
| [`version_extractors`](https://docs.omnipackage.org/configuration/version_extractors/index.md)   | yes      | How to determine the package version                      |
| [`builds`](https://docs.omnipackage.org/configuration/builds/index.md)                           | yes      | Per-distro build configuration                            |
| [`repositories`](https://docs.omnipackage.org/configuration/repositories/index.md)               | no       | Where to publish built packages                           |
| [`image_caches`](https://docs.omnipackage.org/configuration/image_caches/index.md)               | no       | Cached container images to speed up builds                |
| [`secrets`](https://docs.omnipackage.org/configuration/secrets/index.md)                         | no       | Environment-variable substitution into `config.yml`       |
| [`ignore_source_files`](https://docs.omnipackage.org/configuration/ignore_source_files/index.md) | no       | Patterns for files to exclude from the staged source tree |

## Environment substitution

Any string in `config.yml` can reference an environment variable as `${VAR}` (`$VAR` and default values are not recognized). The process environment wins; then `.env`, read from the current directory (override with `--env-file <path>`). A variable defined in neither becomes an empty string. Only variables referenced in `config.yml` are consumed.

A `.env` file is the recommended default: one place for every value, usable both locally and as a single CI secret. In CI you can also pass values directly through the runner's environment, which makes per-secret rotation easier. The two styles mix freely.

For a minimal complete config, see the [`c_makefile` example](https://github.com/omnipackage/examples/blob/master/c_makefile/.omnipackage/config.yml).

# `builds`

Each entry in `builds:` defines one package build for one target distro. A project shipping to Debian 12 and Fedora 40 has two `builds` entries — typically deduplicated with YAML anchors so shared fields live in one place.

## Keys per build entry

| Key                        | Required    | Description                                                                                                                                                                                                       |
| -------------------------- | ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `distro`                   | yes         | Distro ID — see [Supported distros](https://docs.omnipackage.org/distros/index.md). Unknown IDs are silently skipped at build time                                                                                |
| `package_name`             | yes         | Name of the resulting `.rpm` / `.deb` / `.pkg.tar.zst`                                                                                                                                                            |
| `maintainer`               | yes         | `Name <email>` — used in the spec/control `Maintainer:` field and changelog entries                                                                                                                               |
| `homepage`                 | yes         | Project URL — written into the spec `URL:` and DEB `Homepage:` fields                                                                                                                                             |
| `description`              | yes         | Short package description                                                                                                                                                                                         |
| `build_dependencies`       | no          | Distro package names installed in the container before the build. **Names differ per distro family** (`qt6-base-dev` on Debian, `qt6-qtbase-devel` on Fedora) — the main reason for per-family anchors            |
| `runtime_dependencies`     | no          | Distro package names declared as runtime deps. Most projects need few or none; see below                                                                                                                          |
| `before_build_script`      | no          | Path (relative to source dir) to a shell script run inside the container before the package build, e.g. to install a toolchain that isn't in the distro repos                                                     |
| `rpm.spec_template`        | RPM only    | Path (relative to source dir) to a `.spec.liquid` file. Required for RPM-format distros                                                                                                                           |
| `deb.debian_templates`     | DEB only    | Path (relative to source dir) to a directory of `debian/*.liquid` files. Required for DEB-format distros                                                                                                          |
| `pacman.pkgbuild_template` | pacman only | Path (relative to source dir) to a `PKGBUILD.liquid` file. Required for pacman-format distros (Arch, Manjaro)                                                                                                     |
| *(custom fields)*          | no          | Arbitrary scalar values (string, bool, int, float — not arrays or objects) passed straight into the template context. See [Templates](https://docs.omnipackage.org/guides/templates/#custom-per-distro-variables) |

Only the `rpm:`, `deb:`, or `pacman:` block matching the distro's package format is read, so each build entry needs the one for its format. They are usually defined once via a YAML anchor (see below) rather than repeated.

Unknown top-level keys in `config.yml` are silently ignored, which is what lets the anchor pattern below work cleanly.

### When `runtime_dependencies` is needed

Rarely. `rpmbuild` and `dpkg-shlibdeps` scan the built binaries' linked libraries during the package build and add the providing distro packages as dependencies automatically, so the package already declares everything it dynamically links against.

Explicit entries matter for:

- **`dlopen`-loaded libraries** — not present in `DT_NEEDED`, so the build-time scanner cannot see them. Anything loaded by name at runtime (plugins, optional codecs, GPU backends) must be listed.
- **Non-library runtime requirements** — external tools the package shells out to (`gpg`, `ffmpeg`, `podman`), data-only packages, fonts, themes.
- **Choice between alternatives** — when more than one distro package can satisfy the same need (e.g. either `podman` or `docker`), declare the alternation explicitly. See syntax below.

### `runtime_dependencies` syntax

Each entry is a plain distro package name like `gpg` or `libqt5multimedia5-plugins` — sufficient for most projects. Strings pass through verbatim into the rendered spec / control file, so use the syntax the target distro's package format understands.

OR-alternative forms — DEB pipe-OR (`pkg | other-pkg`) and RPM rich-dep syntax (`(pkg or other-pkg)`) — are **only** needed when more than one distro package can satisfy the same need. If a single distro package provides what you want, write its name as a plain string.

```yaml
# Typical case: plain package names
runtime_dependencies: [gpg, ffmpeg]

# Alternation: only when either provider is acceptable
runtime_dependencies: ["podman | docker", gpg]              # DEB target
runtime_dependencies: ["(podman or docker)", gpg]           # RPM target
```

## DRYing up with YAML anchors

Without anchors, shipping to ten distros means repeating the same `package_name`, `maintainer`, `homepage`, `description`, and template paths ten times. With anchors, each build entry shrinks to one or two lines.

A typical layout has three layers: **common** (shared across every build), **per-format** (RPM vs DEB plus template paths), and **per-distro-family** (where dependency lists diverge):

```yaml
common: &common
  package_name: my-app
  maintainer: "You <you@example.com>"
  homepage: https://example.com
  description: A short description

rpm: &rpm
  <<: *common
  rpm:
    spec_template: ".omnipackage/my-app.spec.liquid"

deb: &deb
  <<: *common
  deb:
    debian_templates: ".omnipackage/deb"

pacman: &pacman
  <<: *common
  build_dependencies: [gcc, make, cmake]
  pacman:
    pkgbuild_template: ".omnipackage/PKGBUILD.liquid"

debian_family: &debian_family
  build_dependencies: [build-essential, cmake]
  <<: *deb

fedora_family: &fedora_family
  build_dependencies: [gcc, make, cmake]
  <<: *rpm

builds:
  - distro: "debian_12"
    <<: *debian_family
  - distro: "debian_13"
    <<: *debian_family
  - distro: "ubuntu_24.04"
    <<: *debian_family
  - distro: "fedora_42"
    <<: *fedora_family
  - distro: "almalinux_9"
    <<: *fedora_family
  - distro: "arch"
    <<: *pacman
  - distro: "manjaro"
    <<: *pacman
```

Syntax notes:

- `&name` defines an anchor; `*name` references it.
- `<<:` is YAML's merge key — it copies every key from the referenced mapping into the current one. Keys defined explicitly on the entry override merged values.
- Anchors chain transitively: `*debian_family` merges `*deb`, which merges `*common`, so each `builds` entry inherits everything up the chain.
- The top-level keys `common:`, `rpm:`, `deb:`, `pacman:`, `debian_family:`, `fedora_family:` are not OmniPackage config — they are YAML scratch space hosting anchors. The parser only reads `version_extractors:`, `builds:`, `repositories:`, `image_caches:`, `secrets:`, `ignore_source_files:`.
- Arch and Manjaro share one `*pacman` anchor — same package format, same package names, both rolling — so no per-distro split is needed.
- Per-distro entries can still override anything — a different `build_dependencies` list for one distro, a `before_build_script` only on older distros, and so on. Explicit keys win over merged ones.

For a multi-format project at scale (Qt5 vs. Qt6 splits, per-distro CMake flags), see [`mpz/.omnipackage/config.yml`](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/config.yml). For `before_build_script` on older distros only, see [`omnipackage-rs/.omnipackage/config.yml`](https://github.com/omnipackage/omnipackage-rs/blob/master/.omnipackage/config.yml).

## Custom fields

Any field on a build entry beyond the keys above lands in the [template context](https://docs.omnipackage.org/guides/templates/#custom-per-distro-variables) under the same name. Use it for per-distro variation that doesn't fit `build_dependencies` or `runtime_dependencies`: CMake flags, environment exports, feature toggles. Values must be scalars (strings, bools, ints, floats); arrays and nested objects are not supported.

```yaml
- distro: "ubuntu_20.04"
  build_dependencies: [curl, make, gcc-10]
  ENV_EXPORTS: "export CC=gcc-10"
  before_build_script: ".omnipackage/install_rust.sh"
  <<: *deb
```

`{{ ENV_EXPORTS }}` expands inside the spec or `debian/rules` template to set up the right toolchain before the build. Distros that don't set `ENV_EXPORTS` get an empty string, so the same template works everywhere without `{% if %}` guards.

# `version_extractors`

A version extractor produces the version string stamped into the built package. At least one is required. `release` and `build` select one with `--version-extractor <name>`; the first entry is the default.

## Providers

### `file`

Reads a file and applies a regex to extract the version.

```yaml
version_extractors:
  - name: version_file
    provider: file
    file:
      file: VERSION
      regex: '^(.+)$'
```

### `shell`

Runs a shell command; stdout (trimmed) is the version.

```yaml
version_extractors:
  - name: git_tag
    provider: shell
    shell:
      command: "git describe --tags --abbrev=0"
```

### `constant`

Hardcoded version string.

```yaml
version_extractors:
  - name: fixed
    provider: constant
    constant:
      version: "1.0.0"
```

## Failure behavior

An extractor failure stops the command. `file` fails when the file cannot be read or the regex is invalid or does not match; the regex runs over the whole file, and the version is capture group 1 of the first match. `shell` runs via `sh -c` in the project directory and fails on a nonzero exit.

# `repositories`

Each entry describes one publishing target. `publish` and `release` select one with `--repository <name>`; if omitted, the first entry is used.

## Common keys

| Key                      | Required | Description                                                                                                                                                             |
| ------------------------ | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `name`                   | yes      | Human-readable identifier; passed to `--repository`                                                                                                                     |
| `provider`               | yes      | `s3` or `localfs`                                                                                                                                                       |
| `gpg_private_key_base64` | yes      | Base64-wrapped ASCII-armored private key; normally `${GPG_KEY}`                                                                                                         |
| `package_name`           | yes      | Package name rendered into the install page and used as the project slug under `path_in_bucket`                                                                         |
| `retain_packages`        | no       | Number of previously published packages kept per distro, on top of each new build. Default `0` keeps only the latest build. See [Package retention](#package-retention) |

Extra keys on a repository entry pass through as template variables for the [custom install page](https://docs.omnipackage.org/guides/install_page/#custom-install-page), like [custom fields](https://docs.omnipackage.org/configuration/builds/#custom-fields) on build entries.

## Provider: `localfs`

Writes the repository tree to a host directory instead of a bucket — the same standard repo, no S3 required. Useful for testing, same-machine installs, and self-hosting.

```yaml
- name: Local test
  provider: localfs
  localfs:
    path: /tmp/omnipackage-repos
  gpg_private_key_base64: "${GPG_KEY}"
```

See [Publishing to a local directory](https://docs.omnipackage.org/guides/localfs_repository/index.md) for what gets written and how to serve it.

## Provider: `s3`

Uploads to an S3 bucket or any S3-compatible storage.

| Key                    | Required | Description                                                                                 |
| ---------------------- | -------- | ------------------------------------------------------------------------------------------- |
| `bucket`               | yes      | Bucket name                                                                                 |
| `endpoint`             | yes      | Full S3 endpoint URL                                                                        |
| `access_key_id`        | yes      | Usually `${...}` from env                                                                   |
| `secret_access_key`    | yes      | Usually `${...}` from env                                                                   |
| `region`               | no       | Region string; default `auto`. Required by some providers                                   |
| `path_in_bucket`       | no       | Subdirectory prefix inside the bucket                                                       |
| `bucket_public_url`    | no       | Public URL base used in the generated install page                                          |
| `force_path_style`     | no       | Default `false`; set `true` for MinIO, some R2/B2 setups                                    |
| `cloudflare_zone_id`   | no       | Zone ID to purge after upload. Requires `cloudflare_api_token`; either one alone is ignored |
| `cloudflare_api_token` | no       | API token used for the purge. Requires `cloudflare_zone_id`                                 |

See [Publishing to S3](https://docs.omnipackage.org/guides/s3_repository/index.md) for an end-to-end walkthrough.

## Package retention

`retain_packages` sets how many previously published packages are kept per distro, alongside the new build. With `retain_packages: 3`, each `publish`/`release` keeps the three most recent `.deb`/`.rpm`/`.pkg.tar.zst` files per distro plus the one just built, and removes the rest. The default `0` keeps only the latest build.

On each run, before uploading the new package:

1. Existing packages are fetched from the target.
1. The N most recent by modification time are kept; older ones are pruned.
1. The new package is uploaded, metadata is regenerated, and pruned packages are deleted from the backend (bucket or local path).

Counting is per distro and per package type, and includes nested subdirectories. Retained packages are not re-uploaded.

## Concurrent publishes

The [install page files](https://docs.omnipackage.org/guides/install_page/index.md) are updated with conditional writes, retried on conflict, when the S3 endpoint supports `If-Match` (probed automatically); otherwise last writer wins, with a warning. Repo metadata (`repodata/`, `Packages.gz`, the pacman db) has no such protection: run publishes to the same repository one at a time. In GitHub Actions, use a [`concurrency` group](https://docs.omnipackage.org/guides/cicd/#the-shared-workflow).

```yaml
- name: Releases
  provider: s3
  retain_packages: 3
  s3:
    bucket: my-bucket
    endpoint: https://s3.example.com
  gpg_private_key_base64: "${GPG_KEY}"
  package_name: myapp
```

# `image_caches`

Each build target pulls a container image. Image caches store prepared images (the distro base plus everything `setup` installs) in a registry or locally, so later builds start from the snapshot and skip `setup` entirely.

The cache is populated by [`prime`](https://docs.omnipackage.org/cli/prime/index.md) and consumed by `build` / `publish` / `release` via `--image-cache <name>`. If the named cache is configured but not yet primed, the container runtime fails to pull it — run `prime` first.

## Providers

### `registry`

Push cached images to any OCI-compatible container registry (GHCR, Docker Hub, GitLab Registry, self-hosted Harbor, …).

```yaml
image_caches:
  - name: my-cache
    provider: registry
    image_tag: omnipackage-cache
    registry:
      url: ghcr.io
      namespace: myorg
      username: ${REGISTRY_USER}
      password: ${REGISTRY_TOKEN}
```

The full image reference is `<url>/<namespace>/<distro_id>:<image_tag>`, e.g. `ghcr.io/myorg/fedora_42:omnipackage-cache`. One image per distro, with `image_tag` shared across all of them.

### `local`

Snapshot the image into the container runtime's local store. No registry, no push — for quick local iteration when you just want to skip `setup` on subsequent runs.

```yaml
image_caches:
  - name: local
    provider: local
    image_tag: omnipackage-cache
```

## GitHub Container Registry (ghcr.io)

GHCR is the most common CI target (free, integrated with GitHub Actions) and the most common source of credential confusion. Two cases:

### From GitHub Actions: `GITHUB_TOKEN`

Inside a workflow, the auto-injected `GITHUB_TOKEN` can push and pull from GHCR — no PAT required. The job must declare write access:

```yaml
permissions:
  packages: write
```

(The default for modern repos is read-only — enough to pull but not push; `prime` fails without `write`.) In the workflow step, pass the values into `.env` so `${...}` substitution in `config.yml` can read them:

```yaml
- run: |
    echo "GITHUB_REGISTRY_USERNAME=${{ github.actor }}" >> .env
    echo "GITHUB_REGISTRY_PASSWORD=${{ secrets.GITHUB_TOKEN }}" >> .env
    echo "GITHUB_REGISTRY_NAMESPACE=${{ github.repository_owner }}" >> .env
```

`GITHUB_TOKEN` is ephemeral — scoped to the workflow run, no rotation needed.

### Outside Actions (local dev, other CI): Personal Access Token

`GITHUB_TOKEN` only exists inside a GitHub Actions runner. To `prime` from your laptop or other CI, use a **classic Personal Access Token** with `write:packages` and `read:packages` scopes (fine-grained tokens do not currently cover GHCR — use classic). Create it at GitHub → Settings → Developer settings → Personal access tokens → **Tokens (classic)**, then paste it into your local `.env`:

```sh
GITHUB_REGISTRY_USERNAME=your-github-username
GITHUB_REGISTRY_PASSWORD=ghp_xxxxxxxxxxxxxxxxxxxx
GITHUB_REGISTRY_NAMESPACE=your-github-username   # or an org you have package-write on
```

The same env-var names work in both cases — only the source of the token differs.

### `namespace`: org vs personal

GHCR images are owned by either a GitHub user or an organization. `namespace` is whichever one owns the package:

- Personal repo or personal-account `prime`: `namespace` is your GitHub username (`${{ github.repository_owner }}` resolves to this in personal-repo workflows).
- Org-owned repo: `namespace` is the org name. The token (`GITHUB_TOKEN` or PAT) needs `packages: write` on the org's packages.

For projects primed from both org-owned CI and contributor forks, declare two `image_caches:` entries, one per namespace, and select with `--image-cache <name>` at run time. [`omnipackage-rs/.omnipackage/config.yml`](https://github.com/omnipackage/omnipackage-rs/blob/master/.omnipackage/config.yml) does this with `github` and `github_personal` entries.

## Real-world references

- [`mpz`](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/config.yml) — single `github` entry, primed monthly from GitHub Actions with `GITHUB_TOKEN`.
- [`omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs/blob/master/.omnipackage/config.yml) — dual `github` / `github_personal` entries for org + contributor-fork workflows.

The matching CI wiring (`refresh-omnipackage-cache.yml`, `permissions: packages: write`, the `.env`-writing step) is in the [CI/CD integration guide](https://docs.omnipackage.org/guides/cicd/#image-cache-priming).

# `secrets`

`secrets:` is a top-level map of name-to-value pairs that need to reach the build but must not appear in `config.yml`. Values typically come from `${...}` substitution so the literal value stays in `.env` or the process environment.

```yaml
secrets:
  API_TOKEN: ${API_TOKEN}
  SENTRY_DSN: ${SENTRY_DSN}
```

A typical case is a build-time identifier baked into the application, like Sentry's `SENTRY_DSN`: not catastrophic if leaked, but it should not sit in version control, and the build must embed it into the binary or a shipped config file.

## Where secrets are visible

Each entry in `secrets:` reaches the build through three independent paths.

**1. Environment variables inside the build container.** Every entry is passed as `-e NAME=value`, so anything running inside the container — `before_build_script`, spec `%build` / `%install` scriptlets, `debian/rules` recipes, and anything they shell out to — sees them as ordinary env vars (`$API_TOKEN`, `$SENTRY_DSN`).

**2. The Liquid template context.** Secrets are also exposed as a `secrets` object in the template scope:

```liquid
%post
echo "SENTRY_DSN={{ secrets.SENTRY_DSN }}" >> /etc/my-app/sentry.env
```

Substitution happens at render time; the rendered spec / control file is written to disk in the build directory with the literal value embedded. That is fine for ephemeral CI runners, but **do not** template secrets into files that ship inside the package itself — anyone who downloads it can read them.

**3. As `${...}` substitution targets in `config.yml`.** The same `${}` expansion any other env-sourced value uses; once referenced from `config.yml`, a secret is just a string in the parsed config. The `secrets:` block is what makes it cross into the container in step 1.

## Log redaction

Every value listed in `secrets:` is fed to the logger as a redaction term. Anything OmniPackage prints — its own progress lines, captured stdout/stderr from inside the container — runs through a substring replace that swaps each secret value for `[REDACTED]`. If a build script accidentally `echo`s `$API_TOKEN`, the captured line shows up as `[REDACTED]`.

Two caveats:

- **Redaction is plain substring replace, not regex or whole-token.** Short or non-unique secret values can match unrelated text in the log. Use long, unique values.
- **Redaction only applies to OmniPackage's own log output.** Files written *into* the build (a rendered spec containing `{{ secrets.X }}`) keep the literal value — that is what makes them work. Treat the build directory the same way you would treat the GPG key on disk.

## What gets logged at startup

The job variables line at the top of each build shows only the **keys** of the `secrets:` map, never the values:

```text
starting build for fedora_42, variables: version=1.2.3 current_time_rfc2822=... secrets=[API_TOKEN, SENTRY_DSN]
```

Useful for confirming the right secrets are loaded without leaking them into CI logs.

# `ignore_source_files`

A list of patterns that exclude files and directories from the source tree before it gets staged into the build container. Applies equally to RPM, DEB, and pacman builds.

```yaml
ignore_source_files:
  - .git
  - .env
  - .DS_Store
  - "*.log"
  - /build
  - /target
  - node_modules
```

## What it does

For each build, OmniPackage uses `rsync` to copy the project source into a working directory inside the container (`/root/rpmbuild/SOURCES/<name>/` for RPM, `/output/build/` for DEB, `/work/<name>/` for pacman). Each pattern in `ignore_source_files` is passed verbatim as `--exclude=<pattern>` to that rsync. Matching files never reach the container, never end up in the source tarball that ships inside the RPM, and never enter the `debuild` working tree.

Two main uses:

- **Keep build artefacts out of the package source.** Prior local builds (`/build`, `/dist`, `/target`, `node_modules`) bloat the staged tree and can confuse the in-container build by colliding with what it is about to produce.
- **Keep secrets out.** `.env` typically holds the GPG key and S3 credentials. The final package only contains files your spec / `debian/` / `PKGBUILD` recipes install, so a stray `.env` will not ship on its own — but it sits in the container's working tree, available to anything the build script runs. That is a hazard if a script bakes it into a generated config or copies the tree elsewhere. The init templates exclude `.env`; do the same in a config written from scratch.

## Pattern syntax

Patterns are rsync exclude filters (not gitignore — close, but not identical):

| Pattern     | Matches                                                              |
| ----------- | -------------------------------------------------------------------- |
| `name`      | Any file or directory called `name`, at any depth                    |
| `/name`     | A file or directory called `name` only at the source root (anchored) |
| `*.ext`     | Any file with that extension, at any depth (basename glob)           |
| `dir/*.tmp` | `*.tmp` files directly inside any `dir/`                             |

`*` does not cross `/` boundaries (standard rsync). Stick to the four shapes above; fancier patterns (`**`, character classes) are valid in rsync but inconsistent across versions, so avoid them.

## Defaults from `omnipackage init`

`omnipackage init` writes a starter `ignore_source_files` matching the detected project type. Common to every type:

```yaml
- .git
- .env
- .DS_Store
- "*.log"
```

Per-type additions:

| Project type        | Adds                            |
| ------------------- | ------------------------------- |
| `rust`              | `/target`                       |
| `cmake`, `cpp`, `c` | `/build`                        |
| `electron`, `tauri` | `node_modules`, `/dist`, `/out` |
| `ruby`              | `/vendor`, `/tmp`               |
| `crystal`           | `/lib`, `/bin`                  |

These are starting points — extend them as the project grows. Real-world examples: [`mpz`](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/config.yml) excludes `/build`; [`omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs/blob/master/.omnipackage/config.yml) excludes `/target`.
# CLI reference

# CLI reference

OmniPackage ships a single binary, `omnipackage`, with several subcommands.

## Commands

| Command                                                        | Purpose                                                 |
| -------------------------------------------------------------- | ------------------------------------------------------- |
| [`init`](https://docs.omnipackage.org/cli/init/index.md)       | Scaffold `.omnipackage/` for a new project              |
| [`build`](https://docs.omnipackage.org/cli/build/index.md)     | Build packages inside containers, don't publish         |
| [`publish`](https://docs.omnipackage.org/cli/publish/index.md) | Upload already-built packages to a repository           |
| [`release`](https://docs.omnipackage.org/cli/release/index.md) | `build` and `publish` in one pass per distro            |
| [`prime`](https://docs.omnipackage.org/cli/prime/index.md)     | Pre-populate the image cache                            |
| [`info`](https://docs.omnipackage.org/cli/info/index.md)       | Query project metadata (distros, install-page URL)      |
| [`gpg`](https://docs.omnipackage.org/cli/gpg/index.md)         | Generate and convert signing keys                       |
| [`portal`](https://docs.omnipackage.org/cli/portal/index.md)   | Open an interactive shell in a distro's build container |

## Global options

| Flag                           | Description |
| ------------------------------ | ----------- |
| \`--container-runtime \<docker | podman>\`   |

If neither is set, `podman` is preferred when available, otherwise `docker`. The command fails if neither is in `$PATH`.

## Environment variables

| Variable                        | Effect                                                                                                                            |
| ------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| `OMNIPACKAGE_CONTAINER_RUNTIME` | Same as `--container-runtime`; the flag takes precedence if both are set                                                          |
| `OMNIPACKAGE_BUILD_DIR`         | Same as `--build-dir`; the flag takes precedence if both are set. An empty string is treated as unset (falls back to the default) |
| `NO_COLOR`                      | Disable ANSI colors in OmniPackage's own log output                                                                               |

## Common per-command flags

The project flags (`<project-dir>`, `--config-path`, `--env-file`) apply to `build`, `publish`, `release`, `prime`, and `info`. The job flags (the rest of the table) apply to all of them except `info`. Every flag has a default — most invocations only need `<project-dir>`, which itself defaults to the current directory.

| Flag                   | Default                                                          | Description                                                                                                                   |
| ---------------------- | ---------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| `<project-dir>`        | `.` (current dir)                                                | Positional path to the project root                                                                                           |
| `--config-path <rel>`  | `.omnipackage/config.yml`                                        | Config path relative to the project dir                                                                                       |
| `--env-file <path>`    | `.env`                                                           | `.env` file for `${...}` substitution in `config.yml`. Relative paths resolve from the current directory, not `<project-dir>` |
| `--distros <ids...>`   | **all distros configured in `builds:`**                          | Space-separated list of distro IDs to act on                                                                                  |
| `--build-dir <path>`   | `$TMPDIR/omnipackage-build` (typically `/tmp/omnipackage-build`) | Where intermediate build artefacts go; per-distro subdirs live under here. Also settable via `OMNIPACKAGE_BUILD_DIR`          |
| `--fail-fast`          | off (continue with remaining distros on error)                   | Stop on the first failing distro instead                                                                                      |
| `--image-cache <name>` | none (no cache, full setup runs every time)                      | Use a configured [image cache](https://docs.omnipackage.org/configuration/image_caches/index.md) by name                      |

`--distros`, `--image-cache`, `--repository`, and `--version-extractor` also accept their first-letter short forms (`-d`, `-i`, `-r`, `-v`) on every command that takes them.

## Common logging flags

`build`, `publish`, `release`, and `prime` share these. OmniPackage's own progress logs always go to stdout; the flags below control output from the process running **inside** the container. The full container log is always written to disk under `--build-dir` regardless of these settings.

| Flag                          | Default                                     | Description                                                                                                                                        |
| ----------------------------- | ------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- |
| \`--container-output \<stderr | stdout                                      | null>\`                                                                                                                                            |
| `--disable-container-echo`    | off (`set -x` enabled inside the container) | Quieter container output                                                                                                                           |
| `--fail-log-lines <n>`        | `50`                                        | On failure with `--container-output=null`, print the last N lines of the on-disk log. Ignored otherwise (output already went to the terminal live) |

# `omnipackage init`

Scaffold `.omnipackage/` for a project that doesn't yet have one. Detects the project type from manifest files (`Cargo.toml`, `go.mod`, `package.json`, …), then writes a starter `config.yml`, an RPM `specfile.spec.liquid`, the Debian `control` / `changelog` / `compat` / `rules` templates, and a pacman `PKGBUILD.liquid`, all pre-filled with package name, maintainer, and version-extractor defaults.

```text
omnipackage init [path] [flags]
```

`path` defaults to `.`. Existing files under `.omnipackage/` are preserved unless `--force` is set.

## Flags

| Flag                    | Default                                                    | Description                                                                                                                                                                                                                                                  |
| ----------------------- | ---------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `<path>`                | `.`                                                        | Project directory that will receive `.omnipackage/`                                                                                                                                                                                                          |
| `--type <id>`           | autodetected from manifests                                | Override project type. One of `rust`, `go`, `python`, `ruby`, `crystal`, `c`, `cpp`, `cmake`, `electron`, `tauri`, `generic`                                                                                                                                 |
| `--package-name <name>` | manifest value, else directory basename                    | Package name; slugified for use in paths                                                                                                                                                                                                                     |
| `--maintainer <name>`   | `git config user.name`, then `$USER`, then `Unknown`       | Maintainer name written into changelog and control files                                                                                                                                                                                                     |
| `--email <addr>`        | `git config user.email`, else `unknown@example.com`        | Maintainer email                                                                                                                                                                                                                                             |
| `--homepage <url>`      | manifest value, else `https://example.com`                 | Project homepage                                                                                                                                                                                                                                             |
| `--description <text>`  | manifest value, else `<package> packaged with omnipackage` | Short package description                                                                                                                                                                                                                                    |
| `--retain-packages <n>` | `0`                                                        | Value written to every scaffolded `repositories:` entry; previously published packages kept per distro on top of each new build (`0` = only the latest). See [Package retention](https://docs.omnipackage.org/configuration/repositories/#package-retention) |
| `--force`               | off                                                        | Overwrite existing files in `.omnipackage/`                                                                                                                                                                                                                  |
| `--dry-run`             | off                                                        | Print the planned files without writing                                                                                                                                                                                                                      |

## Project-type detection

`init` walks the project root and picks the first match (most specific first):

| Marker                                              | Type       |
| --------------------------------------------------- | ---------- |
| `src-tauri/Cargo.toml`                              | `tauri`    |
| `Cargo.toml`                                        | `rust`     |
| `shard.yml`                                         | `crystal`  |
| `go.mod`                                            | `go`       |
| `Gemfile` or any `*.gemspec`                        | `ruby`     |
| `package.json`                                      | `electron` |
| `pyproject.toml`, `requirements.txt`, or any `*.py` | `python`   |
| `CMakeLists.txt`                                    | `cmake`    |
| `*.cpp` / `*.cc` / `*.cxx`                          | `cpp`      |
| `*.c`                                               | `c`        |
| anything else                                       | `generic`  |

Pass `--type` to override the autodetected value.

## Default version extractor per type

Each scaffolded `config.yml` ships with a `version_extractors:` entry tuned to the project type:

| Type        | File                   | Regex                             |
| ----------- | ---------------------- | --------------------------------- |
| `rust`      | `Cargo.toml`           | `version = "(.+)"`                |
| `tauri`     | `src-tauri/Cargo.toml` | `version = "(.+)"`                |
| `go`        | `version.go`           | `Version = "(.+)"`                |
| `python`    | `main.py`              | `VERSION = "(.+)"`                |
| `ruby`      | `lib/<pkg>/version.rb` | `VERSION = "(.+)"`                |
| `crystal`   | `shard.yml`            | `version: (.+)`                   |
| `electron`  | `package.json`         | `"version": "(.+)"`               |
| `cmake`     | `CMakeLists.txt`       | `project\([^)]*VERSION ([0-9.]+)` |
| `c` / `cpp` | `version.h`            | `VERSION "(.+)"`                  |
| `generic`   | `VERSION`              | `^(\S+)$`                         |

Edit the resulting `config.yml` if the project keeps its version somewhere else — see [`version_extractors`](https://docs.omnipackage.org/configuration/version_extractors/index.md).

## What gets written

Under `<path>/.omnipackage/`:

- `config.yml` — one `builds:` entry per distro family, with `setup`, `build`, and `install` blocks pre-filled for the project type.
- `specfile.spec.liquid` — RPM spec template.
- `deb/control.liquid`, `deb/changelog.liquid`, `deb/compat.liquid`, `deb/rules.liquid` — Debian source-package templates.
- `PKGBUILD.liquid` — pacman build template (Arch, Manjaro).

`--dry-run` prints the same list without writing. Run it first if you're unsure what `init` will touch.

## After running

1. Edit `config.yml` and replace the placeholder `build:` / `install:` commands with the project's real build steps.
1. Generate or point to a GPG key — see [`gpg generate`](https://docs.omnipackage.org/cli/gpg/index.md) and [Signing packages](https://docs.omnipackage.org/guides/signing/index.md).
1. Fill in a `repositories:` entry — see [`repositories`](https://docs.omnipackage.org/configuration/repositories/index.md).
1. Run [`omnipackage build`](https://docs.omnipackage.org/cli/build/index.md) to verify the scaffold compiles.

# `omnipackage build`

Build packages for the distros defined in `.omnipackage/config.yml` without publishing. A successful run produces `.rpm` / `.deb` / `.pkg.tar.zst` files under `--build-dir`, ready for [`publish`](https://docs.omnipackage.org/cli/publish/index.md).

```text
omnipackage build [project-dir] [flags]
```

`project-dir` defaults to `.`, so plain `omnipackage build` works from the project root.

## Flags

Every flag has a default; the table shows the value used if the flag is omitted.

| Flag                          | Default                              | Description                                                                                                                                                                                              |
| ----------------------------- | ------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `<project-dir>`               | `.`                                  | Project root                                                                                                                                                                                             |
| `--config-path <rel>`         | `.omnipackage/config.yml`            | Config path relative to the project dir                                                                                                                                                                  |
| `--env-file <path>`           | `.env`                               | Env file for `${...}` substitution in `config.yml`                                                                                                                                                       |
| `--distros <ids...>`          | **all distros in `builds:`**         | Space-separated subset of distro IDs                                                                                                                                                                     |
| `--build-dir <path>`          | `$TMPDIR/omnipackage-build`          | Where per-distro build subdirs live                                                                                                                                                                      |
| `--fail-fast`                 | off                                  | Stop on the first failing distro                                                                                                                                                                         |
| `--image-cache <name>`        | none                                 | Use a configured [image cache](https://docs.omnipackage.org/configuration/image_caches/index.md). Requires the cache to be primed first — see [`prime`](https://docs.omnipackage.org/cli/prime/index.md) |
| `--version-extractor <name>`  | first entry in `version_extractors:` | Pick a [version extractor](https://docs.omnipackage.org/configuration/version_extractors/index.md) by name                                                                                               |
| \`--container-output \<stderr | stdout                               | null>\`                                                                                                                                                                                                  |
| `--disable-container-echo`    | off                                  | Disable `set -x` inside the container (less noisy output)                                                                                                                                                |
| `--fail-log-lines <n>`        | `50`                                 | On failure with `--container-output=null`, print the last N lines of the on-disk log. Ignored otherwise — output already went to the terminal live                                                       |

## Notes

- The build matrix is `--distros` (or all configured distros, if omitted) intersected with `builds:`. Each entry runs in its own container; one distro's failure does not affect the others unless `--fail-fast` is set.
- Pass the same `--build-dir` to a follow-up [`publish`](https://docs.omnipackage.org/cli/publish/index.md) — `publish` reads the built artefacts from there.

# `omnipackage publish`

Upload already-built packages to a [repository](https://docs.omnipackage.org/configuration/repositories/index.md). Run [`omnipackage build`](https://docs.omnipackage.org/cli/build/index.md) first **with the same `--build-dir`**: `publish` reads the built `.rpm` / `.deb` / `.pkg.tar.zst` artefacts from there. Use [`omnipackage release`](https://docs.omnipackage.org/cli/release/index.md) for build + publish in one pass without tracking the build dir.

```text
omnipackage publish [project-dir] [flags]
```

`project-dir` defaults to `.`.

## Flags

| Flag                           | Default                        | Description                                                                                                                                      |
| ------------------------------ | ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------ |
| `<project-dir>`                | `.`                            | Project root                                                                                                                                     |
| `--config-path <rel>`          | `.omnipackage/config.yml`      | Config path relative to the project dir                                                                                                          |
| `--env-file <path>`            | `.env`                         | Env file for `${...}` substitution in `config.yml`                                                                                               |
| `--distros <ids...>`           | **all distros in `builds:`**   | Space-separated subset of distros to publish                                                                                                     |
| `--build-dir <path>`           | `$TMPDIR/omnipackage-build`    | Must match the `--build-dir` of the prior `build`                                                                                                |
| `--fail-fast`                  | off                            | Stop on the first failing distro                                                                                                                 |
| `--image-cache <name>`         | none                           | Image cache to use for the repo-metadata generation containers (`createrepo_c`, `dpkg-scanpackages`, `repo-add`)                                 |
| `--repository <name>`          | first entry in `repositories:` | Which `repositories:` entry to publish to                                                                                                        |
| `--custom-install-page <path>` | built-in template              | Override the generated `install.html` template. See [Custom install page](https://docs.omnipackage.org/guides/install_page/#custom-install-page) |
| \`--container-output \<stderr  | stdout                         | null>\`                                                                                                                                          |
| `--disable-container-echo`     | off                            | Disable `set -x` inside the container (less noisy output)                                                                                        |
| `--fail-log-lines <n>`         | `50`                           | On failure with `--container-output=null`, print the last N lines of the on-disk log. Ignored otherwise                                          |

## What `publish` does

For each distro:

1. Prunes previously published packages per the repository's [`retain_packages`](https://docs.omnipackage.org/configuration/repositories/#package-retention) setting before uploading.
1. Starts a container with the distro-native repo-metadata tool (`createrepo_c` for RPM, `dpkg-scanpackages` for DEB, `repo-add` for pacman).
1. Adds the built artefact to the repo tree and signs the metadata with the GPG key from `repositories.gpg_private_key_base64`.
1. Uploads the resulting tree to the configured backend (S3-compatible or local filesystem).
1. Renders the [install page files](https://docs.omnipackage.org/guides/install_page/index.md) (`install.html`, `install.sh`, `install.json`, `badge.svg`) and writes them at the repo root.

# `omnipackage release`

Build and publish in one pass per distro. The most common command: most users only run `release`, not the separate `build` / `publish` pair.

```text
omnipackage release [project-dir] [flags]
```

`project-dir` defaults to `.`.

`release` is not literally `build` followed by `publish`. For each distro it runs build, repo metadata generation, and signing in a single container, then uploads and renders the install page. This is why `release` does not depend on a prior `--build-dir`, while `publish` does.

Previously published packages are pruned per the repository's [`retain_packages`](https://docs.omnipackage.org/configuration/repositories/#package-retention) setting before the upload.

## Flags

The union of `build` and `publish` flags. Every flag has a default; the table shows the value used if the flag is omitted.

| Flag                           | Default                              | Description                                                                                                                                      |
| ------------------------------ | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------ |
| `<project-dir>`                | `.`                                  | Project root                                                                                                                                     |
| `--config-path <rel>`          | `.omnipackage/config.yml`            | Config path relative to the project dir                                                                                                          |
| `--env-file <path>`            | `.env`                               | Env file for `${...}` substitution in `config.yml`                                                                                               |
| `--distros <ids...>`           | **all distros in `builds:`**         | Space-separated subset of distros                                                                                                                |
| `--build-dir <path>`           | `$TMPDIR/omnipackage-build`          | Where per-distro build subdirs live                                                                                                              |
| `--fail-fast`                  | off                                  | Stop on the first failing distro                                                                                                                 |
| `--image-cache <name>`         | none                                 | Use a configured [image cache](https://docs.omnipackage.org/configuration/image_caches/index.md)                                                 |
| `--repository <name>`          | first entry in `repositories:`       | Which `repositories:` entry to publish to                                                                                                        |
| `--version-extractor <name>`   | first entry in `version_extractors:` | Pick a [version extractor](https://docs.omnipackage.org/configuration/version_extractors/index.md) by name                                       |
| `--custom-install-page <path>` | built-in template                    | Override the generated `install.html` template. See [Custom install page](https://docs.omnipackage.org/guides/install_page/#custom-install-page) |
| \`--container-output \<stderr  | stdout                               | null>\`                                                                                                                                          |
| `--disable-container-echo`     | off                                  | Disable `set -x` inside the container (less noisy output)                                                                                        |
| `--fail-log-lines <n>`         | `50`                                 | On failure with `--container-output=null`, print the last N lines of the on-disk log. Ignored otherwise                                          |

## `release` vs. separate `build` + `publish`

- **`release`** — the default. Everything happens in one container per distro, so it is also faster than the two-step pair.
- **`build` then `publish`** — useful for inspecting the artefact (install it locally, run a smoke test) before pushing to the repository, or for publishing the same artefact to multiple repositories without rebuilding.

# `omnipackage info`

Query project metadata without running a build. Useful in CI scripts — the JSON form of `--list-distros` drives the GitHub Actions matrix in the [CI/CD guide](https://docs.omnipackage.org/guides/cicd/index.md).

```text
omnipackage info [project-dir] [flags]
```

`project-dir` defaults to `.`. One of `--list-distros` or `--show-install-page-url` is required (otherwise nothing is printed).

## Flags

| Flag                      | Default                        | Description                                            |
| ------------------------- | ------------------------------ | ------------------------------------------------------ |
| `<project-dir>`           | `.`                            | Project root                                           |
| `--config-path <rel>`     | `.omnipackage/config.yml`      | Config path relative to the project dir                |
| `--env-file <path>`       | `.env`                         | Env file for `${...}` substitution in `config.yml`     |
| `--list-distros`          | off                            | Print every `distro:` ID from `builds:`                |
| `--show-install-page-url` | off                            | Print the URL where the install page will be published |
| `--repository <name>`     | first entry in `repositories:` | Repository scoping for `--show-install-page-url`       |
| \`--format \<plain        | json>\`                        | `plain`                                                |

## Examples

```sh
# Plain list of distros, one per line
omnipackage info . --list-distros

# JSON array — for CI matrix generation
omnipackage info . --list-distros --format json

# Where the install page will land for the default repository
omnipackage info . --show-install-page-url

# ...for a specific repository
omnipackage info . --show-install-page-url --repository "Linux packages - stable"
```

# `omnipackage gpg`

Generate and convert GPG signing keys. See [Signing packages](https://docs.omnipackage.org/guides/signing/index.md) for the broader workflow (export from your existing keyring, passphrase requirements, etc.).

## `gpg generate`

Generate a new keypair and print the **private** key to stdout. The public key is derivable from it on demand, so OmniPackage stores only one.

```text
omnipackage gpg generate --name <name> --email <email> [--format pem|base64]
```

| Flag                  | Default      | Description                |
| --------------------- | ------------ | -------------------------- |
| `-n, --name <name>`   | — (required) | Key owner name (real name) |
| `-e, --email <email>` | — (required) | Key owner email            |
| \`--format \<pem      | base64>\`    | `pem`                      |

The generated key is RSA 4096-bit, no expiration, **no passphrase** (OmniPackage cannot use a passphrased key). Generation runs in an isolated `GNUPGHOME` — your real `~/.gnupg` is never touched.

```sh
# Typical: write directly into .env
echo "GPG_KEY=$(omnipackage gpg generate --name 'Your Name' --email you@example.com --format base64)" >> .env
```

## `gpg convert`

Convert between `pem` and `base64` encodings of the same key.

```text
omnipackage gpg convert [<input>] [--input-format pem|base64] [--output-format pem|base64]
```

| Flag                        | Default   | Description                                                   |
| --------------------------- | --------- | ------------------------------------------------------------- |
| `<input>`                   | stdin     | Positional path to the input key file. Reads stdin if omitted |
| \`-i, --input-format \<pem  | base64>\` | `pem`                                                         |
| \`-o, --output-format \<pem | base64>\` | `base64`                                                      |

Always writes to stdout. The conversion is loss-free — decoding the `base64` form yields exactly the original `pem` block.

```sh
# pem (e.g. exported from your gpg keyring) → base64 for .env
omnipackage gpg convert signing-key.asc

# base64 from .env → pem for inspection or re-import
echo "$GPG_KEY" | omnipackage gpg convert --input-format base64 --output-format pem | gpg --import
```

# `omnipackage portal`

Open an interactive `bash` shell inside the base container image for a given distro. Use it to debug failing builds: run the same `dnf install ...` / `apt-get install ...` / `pacman -Syu ...` lines `setup` would run, inspect the error, find the right package name, then update `config.yml`.

```text
omnipackage portal <distro> [flags]
```

`<distro>` is the distro ID, e.g. `fedora_42`, `debian_13`, or `arch`. See [Supported distros](https://docs.omnipackage.org/distros/index.md) for the full list.

## Flags

| Flag                 | Default                     | Description                                                                                                    |
| -------------------- | --------------------------- | -------------------------------------------------------------------------------------------------------------- |
| `<distro>`           | — (required)                | Distro ID                                                                                                      |
| `--build-dir <path>` | `$TMPDIR/omnipackage-build` | Bind-mounted into the container at `/<basename-of-build-dir>` so you can move files between host and container |

## What you get

- The plain distro base image (e.g. `fedora:42`, `debian:trixie`, `archlinux:latest`) — **not** the post-`setup` snapshot. `portal` is for diagnosing setup, not skipping it.
- An interactive `bash` shell as root.
- `--build-dir` mounted at `/<basename>` (so `/tmp/omnipackage-build` becomes `/omnipackage-build` inside).
- `--rm` semantics — the container is discarded on `exit`; no state persists between portal sessions.

Finding the right package name for a `build_dependencies` entry:

```sh
omnipackage portal fedora_42
# inside container:
dnf install -y my-suspect-package
# or
dnf search my-keyword
```

# `omnipackage prime`

Pre-populate the container [image cache](https://docs.omnipackage.org/configuration/image_caches/index.md) by running each distro's `setup` stage and snapshotting the result. Subsequent `build` / `release` runs start from the cached image and skip `setup` (the slow `apt-get install build-essential ...` / `dnf install rpmdevtools ...` step).

```text
omnipackage prime [project-dir] [flags]
```

`project-dir` defaults to `.`. Requires `image_caches:` to be configured — without it, `prime` errors out with `image_caches is missing`.

## Flags

| Flag                          | Default                        | Description                                                                                             |
| ----------------------------- | ------------------------------ | ------------------------------------------------------------------------------------------------------- |
| `<project-dir>`               | `.`                            | Project root                                                                                            |
| `--config-path <rel>`         | `.omnipackage/config.yml`      | Config path relative to the project dir                                                                 |
| `--env-file <path>`           | `.env`                         | Env file for `${...}` substitution in `config.yml`                                                      |
| `--distros <ids...>`          | **all distros in `builds:`**   | Space-separated subset to prime                                                                         |
| `--build-dir <path>`          | `$TMPDIR/omnipackage-build`    | Where the per-distro temporary directories live                                                         |
| `--fail-fast`                 | off                            | Stop on the first failing distro                                                                        |
| `--image-cache <name>`        | first entry in `image_caches:` | Which image cache to populate                                                                           |
| \`--container-output \<stderr | stdout                         | null>\`                                                                                                 |
| `--disable-container-echo`    | off                            | Disable `set -x` inside the container (less noisy output)                                               |
| `--fail-log-lines <n>`        | `50`                           | On failure with `--container-output=null`, print the last N lines of the on-disk log. Ignored otherwise |

## What `prime` does, per distro

1. Pulls the distro base image.
1. Runs the distro's `setup` and `setup_repo` commands inside a container, including any `before_build_script` from the build entry.
1. Commits the resulting container as an image tagged `<distro_id>:<image_tag>`.
1. For `provider: registry`, logs in and pushes the image. For `provider: local`, leaves it in the container runtime's local store only.

## When to re-prime

Re-prime when any input to `setup` changes, since the cached image will no longer reflect it:

- The distro's published base image receives security updates (the typical reason for the monthly cron in the [CI/CD guide](https://docs.omnipackage.org/guides/cicd/#image-cache-priming)).
- `build_dependencies` change in `config.yml`.
- A `before_build_script` changes.
- The toolchain installed by `setup` changes (e.g. a newer Rust via `install_rust.sh`).

The first usually runs through the scheduled cron; the rest are triggered manually via `workflow_dispatch` after the relevant change lands.
# Reference

# Supported distros

OmniPackage builds DEB, RPM, and pacman packages for the distributions below. Use the **ID** in `config.yml` (`builds[].distro`) and on the command line (`--distros <id>`).

The authoritative source is [`distros.yml`](https://github.com/omnipackage/omnipackage-rs/blob/master/src/distros.yml); run `omnipackage info --list-distros` to print the set your installed version supports.

## DEB-based

| Distribution | IDs                                                                                            |
| ------------ | ---------------------------------------------------------------------------------------------- |
| Debian       | `debian_11`, `debian_12`, `debian_13`, `debian_testing`, `debian_unstable`                     |
| Ubuntu       | `ubuntu_20.04`, `ubuntu_22.04`, `ubuntu_24.04`, `ubuntu_25.04`, `ubuntu_25.10`, `ubuntu_26.04` |

## RPM-based

| Distribution        | IDs                                                                                                         |
| ------------------- | ----------------------------------------------------------------------------------------------------------- |
| Fedora              | `fedora_38`, `fedora_39`, `fedora_40`, `fedora_41`, `fedora_42`, `fedora_43`, `fedora_44`, `fedora_rawhide` |
| openSUSE Leap       | `opensuse_15.3`, `opensuse_15.4`, `opensuse_15.5`, `opensuse_15.6`, `opensuse_16.0`                         |
| openSUSE Tumbleweed | `opensuse_tumbleweed`                                                                                       |
| AlmaLinux           | `almalinux_8`, `almalinux_9`, `almalinux_10`                                                                |
| Rocky Linux         | `rockylinux_8`, `rockylinux_9`, `rockylinux_10`                                                             |
| Mageia              | `mageia_9`, `mageia_10`, `mageia_cauldron`                                                                  |

## Pacman-based

| Distribution | IDs       |
| ------------ | --------- |
| Arch Linux   | `arch`    |
| Manjaro      | `manjaro` |

Deprecated IDs

Still recognized, but their base-image repositories no longer work, so builds fail: `debian_10`, `ubuntu_23.04`, `ubuntu_23.10`. Avoid them in new configs.

## Architecture

OmniPackage does not pass `--platform` to the container runtime, so builds run on the host's native architecture: an ARM64 host produces ARM64 binaries with no extra configuration. Most base images are multiarch. Exceptions: Arch Linux is x86_64-only upstream, and Manjaro's ARM repositories are no longer updated.

Repositories are per-architecture. To publish both `aarch64` and `x86_64`, build two separate sets of repos: each on a host of the matching architecture, with its own bucket or path and its own install page.

# Examples

Minimal single-purpose projects live in the [examples repo](https://github.com/omnipackage/examples), one per language/build-system combination: `c_makefile`, `crystal`, `electron`, `go`, `python`, `ruby`, `rust`, `tauri`, `c_with_secrets`. Each ships a ready-to-use `.omnipackage/config.yml` (RPM, DEB, and pacman targets) and a README.

## Real-world projects

Larger configs that exercise more of OmniPackage — many distros, per-distro overrides, GitHub Actions, signing, S3:

### mpz

[`olegantonyan/mpz`](https://github.com/olegantonyan/mpz) — a Qt desktop music player (C++/CMake). The [`.omnipackage/config.yml`](https://github.com/olegantonyan/mpz/blob/master/.omnipackage/config.yml) demonstrates:

- **36 build targets** across openSUSE, Debian, Ubuntu, Fedora, AlmaLinux, RockyLinux, Mageia, Arch, and Manjaro.
- **Per-distro Qt version split** via YAML anchors (`*debian_qt5` / `*debian_qt6`, `*readhat_qt5` / `*readhat_qt6`). Each anchor sets the right `build_dependencies` and, for Qt5, passes `CMAKE_EXTRA_CLI: "-DUSE_QT5=ON"`.
- **`runtime_dependencies`** for Qt5 multimedia plugins on Debian-family distros.
- **Two `version_extractors`**: a shell extractor producing `2.99~next.<timestamp>.<sha>` for the rolling channel, and a `file` extractor that pulls the stable version from `CMakeLists.txt` via regex.
- **Custom RPM spec** (`mpz.spec.liquid`), **DEB templates directory** (`.omnipackage/deb`), and **pacman `PKGBUILD`** (`.omnipackage/PKGBUILD.liquid`) — Arch/Manjaro build against Qt6 via a shared `*pacman` anchor.
- **Cloudflare R2** with `cloudflare_zone_id` / `cloudflare_api_token` for cache purges after each publish.
- Matching **GitHub Actions workflows** in [`.github/workflows`](https://github.com/olegantonyan/mpz/tree/master/.github/workflows) — the reference setup the [CI/CD guide](https://docs.omnipackage.org/guides/cicd/index.md) walks through.

### omnipackage-rs

[`omnipackage/omnipackage-rs`](https://github.com/omnipackage/omnipackage-rs) — OmniPackage built with itself. The [`.omnipackage/config.yml`](https://github.com/omnipackage/omnipackage-rs/blob/master/.omnipackage/config.yml) addresses a different problem: shipping a Rust binary on distros whose packaged toolchain is too old.

- **`before_build_script: .omnipackage/install_rust.sh`** on older distros (Debian 11/12, Ubuntu 20.04, openSUSE Leap, AlmaLinux, RockyLinux) installs a current toolchain via rustup before the build. Newer distros (Fedora 41+, openSUSE Tumbleweed, Arch, Manjaro) skip the script and use distro-packaged `rust` / `cargo`.
- **Cross-format `runtime_dependencies`** — DEB pipe-OR `["podman | docker", "gpg"]` and RPM rich deps `["(podman or docker)", "gpg"]`. pacman `depends` can't express alternatives, so it hard-depends `["gnupg", "podman"]` (docker via `optdepends`). Same intent, different syntax.
- **Per-distro `ENV_EXPORTS`** — Ubuntu 20.04 needs `export CC=gcc-10` because the default compiler is too old for some dependencies.
- **Two `image_caches`** pointing at the same GHCR registry under different namespaces (org vs. personal) — for builds from forks or contributor accounts.
- **`cargotoml` version extractor** reads the version directly from `Cargo.toml`.
- Matching **GitHub Actions workflows** in [`.github/workflows`](https://github.com/omnipackage/omnipackage-rs/tree/master/.github/workflows). The shape mirrors mpz, plus a `bootstrap-binary` job that builds the binary from source, since OmniPackage builds itself.

Either project is a reasonable starting point: copy mpz for many-distro setups with YAML anchors, copy omnipackage-rs for bootstrapping a toolchain inside the build container.

# Use with AI agents

OmniPackage ships an agent skill so AI coding assistants can scaffold, fill, and debug your packaging.

## Claude Code

Install the skill as a plugin. It triggers on packaging tasks and updates with the tool:

```text
/plugin marketplace add omnipackage/omnipackage-rs
/plugin install omnipackage@omnipackage
```

CLI equivalent: `claude plugin marketplace add omnipackage/omnipackage-rs && claude plugin install omnipackage@omnipackage`. Refresh later with `claude plugin update omnipackage@omnipackage`.

## Any other agent

Point it at the full documentation in one file:

- <https://docs.omnipackage.org/llms-full.txt> — the whole site as a single Markdown file
- <https://docs.omnipackage.org/llms.txt> — a short index of the pages

Both follow the [llms.txt](https://llmstxt.org/) convention; paste the URL into your agent or `curl` it in.