Donavan Fritz
115fa86023
Lets a caller point at a non-default Dockerfile while keeping the build context broader. Needed for repos with multiple binaries sharing internal packages (api/Dockerfile + worker/Dockerfile, build context at repo root). Empty default preserves prior behavior. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
61 lines
1.9 KiB
Markdown
61 lines
1.9 KiB
Markdown
# action/image-build
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Composite Gitea Action that builds a container image with buildx and optionally
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runs a smoke test. **Does not push** — pair with `action/image-push` to publish.
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Splitting build from push lets a PR workflow run `image-build` (no secrets, no
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side effects) for validation while `main` runs the full build → push → deploy
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chain.
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## Usage
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```yaml
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- uses: actions/checkout@v4
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- uses: https://code.fritzlab.net/action/image-build@v1
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with:
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image: code.fritzlab.net/fritzlab/chrony
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smoke-test: docker run --rm --entrypoint /usr/sbin/chronyd $IMAGE -v
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```
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The image is built and tagged as `<image>:<github.run_number>` in the runner's
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local Docker daemon. Subsequent steps (e.g. `action/image-push`) can reference
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the same tag.
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## Inputs
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| Name | Required | Default | Description |
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| `image` | yes | — | Full image name without tag (e.g. `code.fritzlab.net/fritzlab/chrony`). |
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| `context` | no | `.` | Docker build context. |
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| `dockerfile` | no | `Dockerfile` (in context) | Path to the Dockerfile, relative to the context (or absolute under `$GITHUB_WORKSPACE`). Use for monorepos where the build context is the repo root but the Dockerfile lives in a subdir, e.g. `dockerfile: api/Dockerfile`. |
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| `build-args` | no | — | Multiline `KEY=VALUE` build args. |
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| `smoke-test` | no | — | Shell command run after build. `$IMAGE` is set to `<image>:<run_number>`. Non-zero exit fails the action. |
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## Outputs
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| Name | Description |
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|---|---|
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| `tag` | Numeric tag assigned (= `github.run_number`). |
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## Smoke test patterns
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Override entrypoint for a binary that expects no args:
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```yaml
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smoke-test: docker run --rm --entrypoint /usr/sbin/chronyd $IMAGE -v
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```
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Run a help command that returns non-zero:
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```yaml
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smoke-test: docker run --rm $IMAGE --help || true
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```
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Multiple checks chained:
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```yaml
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smoke-test: |
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docker run --rm $IMAGE --version
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docker run --rm --entrypoint /bin/sh $IMAGE -c 'test -x /usr/local/bin/myapp'
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```
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