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release workflow (karol-broda/snitch)

The release workflow from karol-broda/snitch, explained and optimized by Latchkey.

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Source: karol-broda/snitch.github/workflows/release.yamlLicense MITView source

What it does

This is the release workflow from the karol-broda/snitch repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)
name: release

on:
  push:
    tags:
      - "v*"

permissions:
  contents: write
  packages: write

jobs:
  release-linux:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: actions/setup-go@v6
        with:
          go-version: "1.25.0"

      - name: release linux
        uses: goreleaser/goreleaser-action@v6
        with:
          version: "~> v2"
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          AUR_KEY: ${{ secrets.AUR_KEY }}

  release-darwin:
    needs: release-linux
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: actions/setup-go@v6
        with:
          go-version: "1.25.0"

      - name: release darwin
        uses: goreleaser/goreleaser-action@v6
        with:
          version: "~> v2"
          args: release --clean --config .goreleaser-darwin.yaml --skip=validate
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  release-containers:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        variant: [alpine, debian, ubuntu, scratch]
        include:
          - variant: alpine
            is_default: true
          - variant: debian
            is_default: false
          - variant: ubuntu
            is_default: false
          - variant: scratch
            is_default: false
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: DeterminateSystems/nix-installer-action@v17

      - uses: nix-community/cache-nix-action@v6
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
          restore-prefixes-first-match: nix-${{ runner.os }}-

      - name: login to ghcr
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: build container
        run: nix build ".#snitch-${{ matrix.variant }}" --print-out-paths

      - name: load and push container
        env:
          VERSION: ${{ github.ref_name }}
          REPO: ghcr.io/${{ github.repository_owner }}/snitch
          VARIANT: ${{ matrix.variant }}
          IS_DEFAULT: ${{ matrix.is_default }}
        run: |
          VERSION="${VERSION#v}"

          docker load < result

          IMAGE_TAG=$(docker images --format '{{.Repository}}:{{.Tag}}' | grep "snitch:.*-${VARIANT}" | head -1)

          if [ -z "$IMAGE_TAG" ]; then
            echo "error: could not find loaded image for ${VARIANT}"
            exit 1
          fi

          docker tag "$IMAGE_TAG" "${REPO}:${VERSION}-${VARIANT}"
          docker tag "$IMAGE_TAG" "${REPO}:latest-${VARIANT}"
          docker push "${REPO}:${VERSION}-${VARIANT}"
          docker push "${REPO}:latest-${VARIANT}"

          if [ "$IS_DEFAULT" = "true" ]; then
            docker tag "$IMAGE_TAG" "${REPO}:${VERSION}"
            docker tag "$IMAGE_TAG" "${REPO}:latest"
            docker push "${REPO}:${VERSION}"
            docker push "${REPO}:latest"
          fi

      - name: summary
        env:
          VERSION: ${{ github.ref_name }}
          REPO: ghcr.io/${{ github.repository_owner }}/snitch
          VARIANT: ${{ matrix.variant }}
        run: |
          VERSION="${VERSION#v}"
          echo "pushed ${REPO}:${VERSION}-${VARIANT}" >> $GITHUB_STEP_SUMMARY

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: release
 
on:
  push:
    tags:
      - "v*"
 
permissions:
  contents: write
  packages: write
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  release-linux:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
 
      - uses: actions/setup-go@v6
        with:
          go-version: "1.25.0"
 
      - name: release linux
        uses: goreleaser/goreleaser-action@v6
        with:
          version: "~> v2"
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          AUR_KEY: ${{ secrets.AUR_KEY }}
 
  release-darwin:
    timeout-minutes: 30
    needs: release-linux
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
 
      - uses: actions/setup-go@v6
        with:
          go-version: "1.25.0"
 
      - name: release darwin
        uses: goreleaser/goreleaser-action@v6
        with:
          version: "~> v2"
          args: release --clean --config .goreleaser-darwin.yaml --skip=validate
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
  release-containers:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      matrix:
        variant: [alpine, debian, ubuntu, scratch]
        include:
          - variant: alpine
            is_default: true
          - variant: debian
            is_default: false
          - variant: ubuntu
            is_default: false
          - variant: scratch
            is_default: false
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
 
      - uses: DeterminateSystems/nix-installer-action@v17
 
      - uses: nix-community/cache-nix-action@v6
        with:
          primary-key: nix-${{ runner.os }}-${{ hashFiles('flake.lock') }}
          restore-prefixes-first-match: nix-${{ runner.os }}-
 
      - name: login to ghcr
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
 
      - name: build container
        run: nix build ".#snitch-${{ matrix.variant }}" --print-out-paths
 
      - name: load and push container
        env:
          VERSION: ${{ github.ref_name }}
          REPO: ghcr.io/${{ github.repository_owner }}/snitch
          VARIANT: ${{ matrix.variant }}
          IS_DEFAULT: ${{ matrix.is_default }}
        run: |
          VERSION="${VERSION#v}"
 
          docker load < result
 
          IMAGE_TAG=$(docker images --format '{{.Repository}}:{{.Tag}}' | grep "snitch:.*-${VARIANT}" | head -1)
 
          if [ -z "$IMAGE_TAG" ]; then
            echo "error: could not find loaded image for ${VARIANT}"
            exit 1
          fi
 
          docker tag "$IMAGE_TAG" "${REPO}:${VERSION}-${VARIANT}"
          docker tag "$IMAGE_TAG" "${REPO}:latest-${VARIANT}"
          docker push "${REPO}:${VERSION}-${VARIANT}"
          docker push "${REPO}:latest-${VARIANT}"
 
          if [ "$IS_DEFAULT" = "true" ]; then
            docker tag "$IMAGE_TAG" "${REPO}:${VERSION}"
            docker tag "$IMAGE_TAG" "${REPO}:latest"
            docker push "${REPO}:${VERSION}"
            docker push "${REPO}:latest"
          fi
 
      - name: summary
        env:
          VERSION: ${{ github.ref_name }}
          REPO: ghcr.io/${{ github.repository_owner }}/snitch
          VARIANT: ${{ matrix.variant }}
        run: |
          VERSION="${VERSION#v}"
          echo "pushed ${REPO}:${VERSION}-${VARIANT}" >> $GITHUB_STEP_SUMMARY
 

What changed

4 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

This workflow runs 3 jobs (6 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow