ci.yml

name: CI

on:
  push:
    branches: ["main"]
    tags: ["helm/**", "v*"]
  pull_request:
    branches: ["main"]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CACHE: ${{ (github.event_name == 'push'
              || github.event_name == 'pull_request')
          && github.ref != 'refs/heads/main'
          && !startsWith(github.ref, 'refs/tags/v')
          && !contains(github.event.head_commit.message, '[fresh ci]') }}
  RUST_BACKTRACE: 1
  RUST_VER: "1.62"

jobs:

  ################
  # Pull Request #
  ################

  pr:
    if: ${{ github.event_name == 'pull_request' }}
    needs:
      - clippy
      - docker
      - helm-lint
      - rustdoc
      - rustfmt
      - test-e2e
      - test-unit
    runs-on: ubuntu-latest
    steps:
      - run: true




  ##########################
  # Linting and formatting #
  ##########################

  clippy:
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ env.RUST_VER }}
          override: true
          components: clippy
      - uses: Swatinem/rust-cache@v1
        if: ${{ env.CACHE == 'true' }}

      - run: make cargo.lint

  helm-lint:
    name: Lint Helm chart
    if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
    strategy:
      fail-fast: false
      matrix:
        chart: ["baza"]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: azure/setup-helm@v3

      - run: make helm.lint chart=${{ matrix.chart }}

  rustfmt:
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: nightly
          components: rustfmt

      - run: make cargo.fmt check=yes




  ###########
  # Testing #
  ###########

  test-e2e:
    name: E2E tests
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    needs: ["docker"]
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ env.RUST_VER }}
          override: true
      - uses: Swatinem/rust-cache@v1
        if: ${{ env.CACHE == 'true' }}
      - uses: satackey/action-docker-layer-caching@v0.0.11
        with:
          key: test-e2e-{hash}
          restore-keys: test-e2e-
        continue-on-error: true
        timeout-minutes: 10
        if: ${{ env.CACHE == 'true' }}

      - uses: actions/download-artifact@v3
        with:
          name: docker-${{ github.run_number }}
          path: .cache/docker/
      - run: make docker.untar

      - run: make test.e2e start-app=yes dockerized=yes
                  tag=build-${{ github.run_number }}

  test-unit:
    name: Unit tests
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ env.RUST_VER }}
          override: true
      - uses: Swatinem/rust-cache@v1
        if: ${{ env.CACHE == 'true' }}

      - run: make test.unit




  ############
  # Building #
  ############

  docker:
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: docker/setup-buildx-action@v2

      - run: make docker.image debug=no no-cache=yes
                  tag=build-${{ github.run_number }}

      - run: make docker.tar
                  tags=build-${{ github.run_number }}
      - uses: actions/upload-artifact@v3
        with:
          name: docker-${{ github.run_number }}
          path: .cache/docker/image.tar
          retention-days: 1

  rustdoc:
    if: ${{ !startsWith(github.ref, 'refs/tags/helm/') }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions-rs/toolchain@v1
        with:
          profile: minimal
          toolchain: ${{ env.RUST_VER }}
          override: true
      - uses: Swatinem/rust-cache@v1
        if: ${{ env.CACHE == 'true' }}

      - run: make cargo.doc private=yes open=no




  #############
  # Releasing #
  #############

  release-docker:
    name: Release Docker image
    if: ${{ github.event_name == 'push'
         && (github.ref == 'refs/heads/main'
             || startsWith(github.ref, 'refs/tags/v')) }}
    needs: ["docker", "test-e2e"]
    strategy:
      fail-fast: false
      matrix:
        registry: ["docker.io", "ghcr.io", "quay.io"]
    runs-on: ubuntu-latest
    steps:
      # Skip if this is fork and no credentials are provided.
      - id: skip
        run: echo ::set-output name=no::${{ !(
               github.repository_owner != 'instrumentisto'
               && ((matrix.registry == 'quay.io'
                    && secrets.QUAYIO_ROBOT_USER == '')
                || (matrix.registry == 'docker.io'
                    && secrets.DOCKERHUB_BOT_USER == ''))
             ) }}

      - uses: actions/checkout@v3
        if: ${{ steps.skip.outputs.no == 'true' }}

      - uses: actions/download-artifact@v3
        with:
          name: docker-${{ github.run_number }}
          path: .cache/docker/
        if: ${{ steps.skip.outputs.no == 'true' }}
      - run: make docker.untar
        if: ${{ steps.skip.outputs.no == 'true' }}

      - name: Login to ${{ matrix.registry }} container registry
        uses: docker/login-action@v2
        with:
          registry: ${{ matrix.registry }}
          username: ${{ (matrix.registry == 'docker.io'
                         && secrets.DOCKERHUB_BOT_USER)
                     || (matrix.registry == 'quay.io'
                         && secrets.QUAYIO_ROBOT_USER)
                     || github.repository_owner }}
          password: ${{ (matrix.registry == 'docker.io'
                         && secrets.DOCKERHUB_BOT_PASS)
                     || (matrix.registry == 'quay.io'
                         && secrets.QUAYIO_ROBOT_TOKEN)
                     || secrets.GITHUB_TOKEN }}
        if: ${{ steps.skip.outputs.no == 'true' }}

      - name: Parse semver versions from Git tag
        id: semver
        uses: actions-ecosystem/action-regex-match@v2
        with:
          text: ${{ github.ref }}
          regex: '^refs/tags/v((([0-9]+)\.[0-9]+)\.[0-9]+(-.+)?)$'
        if: ${{ steps.skip.outputs.no == 'true'
             && startsWith(github.ref, 'refs/tags/v') }}
      - name: Form version Docker tags
        id: tags
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            let versions = '${{ steps.semver.outputs.group1 }}';
            if ('${{ steps.semver.outputs.group4 }}' === '') {
              versions += ',${{ steps.semver.outputs.group2 }}';
              if ('${{ steps.semver.outputs.group3 }}' !== '0') {
                versions += ',${{ steps.semver.outputs.group3 }}';
              }
              versions += ',latest';
            }
            return versions;
        if: ${{ steps.skip.outputs.no == 'true'
             && startsWith(github.ref, 'refs/tags/v') }}

      - run: make docker.tags
                  registries=${{ matrix.registry }}
                  of=build-${{ github.run_number }}
                  tags=${{ (startsWith(github.ref, 'refs/tags/v')
                            && steps.tags.outputs.result)
                        ||     'edge' }}
        if: ${{ steps.skip.outputs.no == 'true' }}
      - run: make docker.push
                  registries=${{ matrix.registry }}
                  tags=${{ (startsWith(github.ref, 'refs/tags/v')
                            && steps.tags.outputs.result)
                        ||     'edge' }}
        if: ${{ steps.skip.outputs.no == 'true' }}

      # On GitHub Container Registry README is automatically updated on pushes.
      - name: Update README on Docker Hub
        uses: christian-korneck/update-container-description-action@v1
        with:
          provider: dockerhub
          destination_container_repo: ${{ github.repository }}
          readme_file: README.md
        env:
          DOCKER_USER: ${{ secrets.DOCKERHUB_BOT_USER }}
          DOCKER_PASS: ${{ secrets.DOCKERHUB_BOT_PASS }}
        if: ${{ steps.skip.outputs.no == 'true'
             && matrix.registry == 'docker.io' }}
      - name: Update README on Quay.io
        uses: christian-korneck/update-container-description-action@v1
        with:
          provider: quay
          destination_container_repo: ${{ matrix.registry }}/${{ github.repository }}
          readme_file: README.md
        env:
          DOCKER_APIKEY: ${{ secrets.QUAYIO_API_TOKEN }}
        if: ${{ steps.skip.outputs.no == 'true'
             && matrix.registry == 'quay.io' }}

  release-github:
    name: Release on GitHub
    if: ${{ startsWith(github.ref, 'refs/tags/v') }}
    needs:
      - clippy
      - release-docker
      - rustdoc
      - rustfmt
      - test-e2e
      - test-unit
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Parse semver versions from Git tag
        id: semver
        uses: actions-ecosystem/action-regex-match@v2
        with:
          text: ${{ github.ref }}
          regex: '^refs/tags/v((([0-9]+)\.[0-9]+)\.[0-9]+(-.+)?)$'
      - name: Verify Git tag version matches `Cargo.toml` version
        run: |
          test "${{ steps.semver.outputs.group1 }}" \
            == "$(grep -m1 'version = "' Cargo.toml | cut -d'"' -f2)"

      - name: Parse CHANGELOG link
        id: changelog
        run: echo ::set-output
                  name=link::${{ github.server_url }}/${{ github.repository }}/blob/v${{ steps.semver.outputs.group1 }}/CHANGELOG.md#$(sed -n '/^## \[${{ steps.semver.outputs.group1 }}\]/{s/^## \[\(.*\)\][^0-9]*\([0-9].*\)/\1--\2/;s/[^0-9a-z-]*//g;p;}' CHANGELOG.md)
      - name: Parse milestone link
        id: milestone
        run: echo ::set-output
                  name=link::${{ github.server_url }}/${{ github.repository }}/milestone/$(sed -n '/^## \[${{ steps.semver.outputs.group1 }}\]/,/Milestone/{s/.*milestone.\([0-9]*\).*/\1/p;}' CHANGELOG.md)

      - name: Create GitHub release
        uses: softprops/action-gh-release@v1
        with:
          name: ${{ steps.semver.outputs.group1 }}
          body: >
            [Changelog](${{ steps.changelog.outputs.link }}) |
            [Milestone](${{ steps.milestone.outputs.link }})
          prerelease: ${{ contains(steps.semver.outputs.group1, '-') }}

  release-helm:
    name: Release Helm chart
    if: ${{ startsWith(github.ref, 'refs/tags/helm/') }}
    needs: ["helm-lint"]
    strategy:
      max-parallel: 1
      matrix:
        chart: ["baza"]
    runs-on: ubuntu-latest
    steps:
      - id: skip
        run: echo ::set-output name=no::${{
                 startsWith(github.ref,
                            format('refs/tags/helm/{0}/', matrix.chart))
             }}

      - uses: actions/checkout@v3
        if: ${{ steps.skip.outputs.no == 'true' }}
      - uses: azure/setup-helm@v3
        if: ${{ steps.skip.outputs.no == 'true' }}

      - name: Parse semver versions from Git tag
        id: semver
        uses: actions-ecosystem/action-regex-match@v2
        with:
          text: ${{ github.ref }}
          regex: '^refs/tags/helm/${{ matrix.chart }}/((([0-9]+)\.[0-9]+)\.[0-9]+(-.+)?)$'
        if: ${{ steps.skip.outputs.no == 'true' }}
      - name: Verify Git tag version matches `Chart.yaml` version
        run: |
          test "${{ steps.semver.outputs.group1 }}" \
            == "$(grep -m1 'version: ' helm/${{ matrix.chart }}/Chart.yaml \
                  | cut -d' ' -f2)"
        if: ${{ steps.skip.outputs.no == 'true' }}

      - run: make helm.package chart=${{ matrix.chart }}
                  out-dir=.cache/helm/ clean=yes
        if: ${{ steps.skip.outputs.no == 'true' }}

      # Helm's digest is just SHA256 checksum:
      # https://github.com/helm/helm/blob/v3.9.2/pkg/provenance/sign.go#L417-L418
      - name: Generate SHA256 checksum
        run: ls -1 | xargs -I {} sh -c "sha256sum {} > {}.sha256sum"
        working-directory: .cache/helm/
        if: ${{ steps.skip.outputs.no == 'true' }}
      - name: Show generated SHA256 checksum
        run: cat *.sha256sum
        working-directory: .cache/helm/
        if: ${{ steps.skip.outputs.no == 'true' }}

      - name: Parse CHANGELOG link
        id: changelog
        run: echo ::set-output
                  name=link::${{ github.server_url }}/${{ github.repository }}/blob/helm%2F${{ matrix.chart }}%2F${{ steps.semver.outputs.group1 }}/helm/${{ matrix.chart }}/CHANGELOG.md#$(sed -n '/^## \[${{ steps.semver.outputs.group1 }}\]/{s/^## \[\(.*\)\][^0-9]*\([0-9].*\)/\1--\2/;s/[^0-9a-z-]*//g;p;}' helm/${{ matrix.chart }}/CHANGELOG.md)

      - name: Create GitHub release
        uses: softprops/action-gh-release@v1
        with:
          name: helm/${{ matrix.chart }} ${{ steps.semver.outputs.group1 }}
          body: >
            [Changelog](${{ steps.changelog.outputs.link }}) |
            [Overview](${{ github.server_url }}/${{ github.repository }}/tree/helm%2F${{ matrix.chart }}%2F${{ steps.semver.outputs.group1 }}/helm/${{ matrix.chart }}) |
            [Values](${{ github.server_url }}/${{ github.repository }}/blob/helm%2F${{ matrix.chart }}%2F${{ steps.semver.outputs.group1 }}/helm/${{ matrix.chart }}/values.yaml)
          files: |
            .cache/helm/*.tgz
            .cache/helm/*.sha256sum
          fail_on_unmatched_files: true
          prerelease: ${{ contains(steps.semver.outputs.group1, '-') }}
        if: ${{ steps.skip.outputs.no == 'true' }}

      - name: Parse Git repository name
        id: repo
        uses: actions-ecosystem/action-regex-match@v2
        with:
          text: ${{ github.repository }}
          regex: '^${{ github.repository_owner }}/(.+)$'

      # TODO: Find or write a tool to build index idempotently from GitHub
      #       releases, and keep on GitHub Pages only the built index.
      #       https://github.com/helm/chart-releaser/issues/133
      - name: Update Helm repository index
        run: |
          set -ex

          git config --local user.email 'actions+${{ github.run_number }}@github.com'
          git config --local user.name 'GitHub Actions'

          git fetch origin gh-pages:gh-pages
          git checkout gh-pages
          git reset --hard

          mkdir -p helm/
          cp -rf .cache/helm/*.tgz helm/
          helm repo index helm/ --url=https://${{ github.repository_owner }}.github.io/${{ steps.repo.outputs.group1 }}/helm

          git add -v helm/
          git commit -m 'Release ${{ steps.semver.outputs.group1 }} version of `${{ matrix.chart }}` Helm chart'
          git checkout -
          git push origin gh-pages
        if: ${{ steps.skip.outputs.no == 'true' }}