blumeops/docs/reference/tools/dagger.md
Erich Blume 779b7d6709 Eliminate double towncrier run in release workflow (#199)
## Summary

- Added a new `build_quartz` Dagger function that builds the Quartz site from a pre-processed source tree (no towncrier)
- Reordered the release workflow so towncrier runs **once** on the runner, then passes the updated working tree to `build-quartz`
- `build_docs` and `build_changelog` are preserved for standalone use — `build_docs` now delegates to `build_quartz` internally

## Motivation

Previously towncrier ran twice per release: once inside a Dagger container (via `build_docs` → `build_changelog`) and once on the runner to capture CHANGELOG.md changes for the git commit. This was wasteful and fragile — if towncrier behavior changed, the two runs could produce different results.

## Test plan

- [ ] Review diff to confirm workflow step ordering is correct
- [ ] Trigger a release and confirm towncrier runs only once
- [ ] Verify the docs tarball contains the updated CHANGELOG.md
- [ ] `dagger call build-quartz --src=. --version=vX.Y.Z` should work standalone

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/199
2026-02-16 21:24:34 -08:00

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---
title: Dagger
modified: 2026-02-12
tags:
- reference
- ci-cd
- dagger
---
# Dagger
Build engine for BlumeOps CI/CD pipelines. Replaces shell-based build scripts with Python functions that run identically locally and in CI.
## Quick Reference
| Property | Value |
|----------|-------|
| **Module** | `blumeops-ci` |
| **Engine Version** | v0.19.11 |
| **SDK** | Python |
| **Source** | `.dagger/src/blumeops_ci/main.py` |
| **Config** | `dagger.json` |
## Functions
| Function | Signature | Description |
|----------|-----------|-------------|
| `build` | `(src, container_name) → Container` | Build a container from `containers/<name>/Dockerfile` |
| `publish` | `(src, container_name, version, registry?) → str` | Build and push to registry (default: `registry.ops.eblu.me`) |
| `build_docs` | `(src, version) → File` | Build Quartz docs site, return docs tarball |
## CLI Examples
```bash
# Build a container
dagger call build --src=. --container-name=devpi
# Drop into container shell for inspection
dagger call build --src=. --container-name=devpi terminal
# Debug a failure interactively
dagger call --interactive build --src=. --container-name=devpi
# Publish a container to zot
dagger call publish --src=. --container-name=devpi --version=v1.1.0
# Build docs tarball locally
dagger call build-docs --src=. --version=dev export --path=./docs-dev.tar.gz
# Debug a docs build failure
dagger call --interactive build-docs --src=. --version=dev
```
## Secrets
Dagger has a first-class `Secret` type — values are never logged or cached. Pass secrets from environment variables using the `env:VAR` syntax:
```bash
dagger call release-docs \
--src=. --version=v1.6.0 \
--forgejo-token=env:FORGEJO_TOKEN \
--argocd-token=env:ARGOCD_TOKEN
```
In [[forgejo]] Actions, secrets are injected as env vars. Locally, mise tasks call `op read` to populate them.
## Caveats
- **Pre-1.0 API** — Current version is v0.19.x. Pin the CLI version and test upgrades on a branch before adopting.
- **Privileged container** — The Dagger engine requires privileged container access. The Forgejo runner's DinD sidecar provides this.
## Related
- [[forgejo]] — CI/CD trigger layer
- [[zot]] — Container registry (publish target)
- [[docs]] — Documentation site (build target)
- [[adopt-dagger-ci]] — Adoption plan (phases 13 complete)