Erich Blume
2b296b34a6
- dagger.md: add build_nix, nix_version, flake_lock to functions table - build-container-image.md: document Dagger as local nix build option - build-authentik-container.md: mention Dagger build path - Mark add-dagger-nix-build card complete Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
86 lines
2.8 KiB
Markdown
86 lines
2.8 KiB
Markdown
---
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title: Dagger
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modified: 2026-02-20
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tags:
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- reference
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- ci-cd
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- dagger
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---
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# Dagger
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Build engine for BlumeOps CI/CD pipelines. Replaces shell-based build scripts with Python functions that run identically locally and in CI.
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## Quick Reference
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| Property | Value |
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|----------|-------|
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| **Module** | `blumeops-ci` |
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| **Engine Version** | v0.19.11 |
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| **SDK** | Python |
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| **Source** | `.dagger/src/blumeops_ci/main.py` |
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| **Config** | `dagger.json` |
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## Functions
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| Function | Signature | Description |
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|----------|-----------|-------------|
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| `build` | `(src, container_name) → Container` | Build a container from `containers/<name>/Dockerfile` |
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| `publish` | `(src, container_name, version, registry?) → str` | Build and push to registry (default: `registry.ops.eblu.me`) |
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| `build_nix` | `(src, container_name) → File` | Build a nix container from `containers/<name>/default.nix`, return docker-archive tarball |
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| `nix_version` | `(package) → str` | Extract the version of a nixpkgs package |
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| `build_docs` | `(src, version) → File` | Build Quartz docs site, return docs tarball |
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| `flake_lock` | `(src, flake_path?) → File` | Resolve flake inputs, return updated `flake.lock` |
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## CLI Examples
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```bash
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# Build a container
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dagger call build --src=. --container-name=devpi
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# Drop into container shell for inspection
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dagger call build --src=. --container-name=devpi terminal
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# Debug a failure interactively
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dagger call --interactive build --src=. --container-name=devpi
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# Publish a container to zot
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dagger call publish --src=. --container-name=devpi --version=v1.1.0
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# Build a nix container (no local nix required)
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dagger call build-nix --src=. --container-name=nettest export --path=./nettest.tar.gz
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# Check a nixpkgs package version
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dagger call nix-version --package=authentik
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# Build docs tarball locally
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dagger call build-docs --src=. --version=dev export --path=./docs-dev.tar.gz
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# Debug a docs build failure
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dagger call --interactive build-docs --src=. --version=dev
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```
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## Secrets
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Dagger has a first-class `Secret` type — values are never logged or cached. Pass secrets from environment variables using the `env:VAR` syntax:
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```bash
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dagger call release-docs \
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--src=. --version=v1.6.0 \
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--forgejo-token=env:FORGEJO_TOKEN \
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--argocd-token=env:ARGOCD_TOKEN
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```
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In [[forgejo]] Actions, secrets are injected as env vars. Locally, mise tasks call `op read` to populate them.
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## Caveats
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- **Pre-1.0 API** — Current version is v0.19.x. Pin the CLI version and test upgrades on a branch before adopting.
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- **Privileged container** — The Dagger engine requires privileged container access. The Forgejo runner's DinD sidecar provides this.
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## Related
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- [[forgejo]] — CI/CD trigger layer
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- [[zot]] — Container registry (publish target)
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- [[docs]] — Documentation site (build target)
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- [[adopt-dagger-ci]] — Adoption plan (phases 1–3 complete)
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