on:
  push:
    tags:
      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10

name: Containerd Release

jobs:
  check:
    name: Check Signed Tag
    runs-on: ubuntu-18.04
    timeout-minutes: 5
    outputs:
      stringver: ${{ steps.contentrel.outputs.stringver }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v2
        with:
          ref: ${{ github.ref }}
          path: src/github.com/containerd/containerd

      - name: Check signature
        run: |
          releasever=${{ github.ref }}
          releasever="${releasever#refs/tags/}"
          TAGCHECK=$(git tag -v ${releasever} 2>&1 >/dev/null) ||
          echo "${TAGCHECK}" | grep -q "error" && {
              echo "::error::tag ${releasever} is not a signed tag. Failing release process."
              exit 1
          } || {
              echo "Tag ${releasever} is signed."
              exit 0
          }
        working-directory: src/github.com/containerd/containerd

      - name: Release content
        id: contentrel
        run: |
          RELEASEVER=${{ github.ref }}
          echo "::set-output name=stringver::${RELEASEVER#refs/tags/v}"
          git tag -l ${RELEASEVER#refs/tags/} -n20000 | tail -n +3 | cut -c 5- >release-notes.md
        working-directory: src/github.com/containerd/containerd

      - name: Save release notes
        uses: actions/upload-artifact@v2
        with:
          name: containerd-release-notes
          path: src/github.com/containerd/containerd/release-notes.md

  build:
    name: Build Release Binaries
    runs-on: ${{ matrix.os }}
    needs: [check]
    timeout-minutes: 10
    strategy:
      matrix:
        os: [ubuntu-18.04]
        platform:
          - linux/amd64
          - linux/arm64
          - windows/amd64
    steps:
      - name: Install Go
        uses: actions/setup-go@v2
        with:
          go-version: '1.17.3'
      - name: Set env
        shell: bash
        env:
          MOS: ${{ matrix.os }}
        run: |
          releasever=${{ github.ref }}
          releasever="${releasever#refs/tags/}"
          echo "RELEASE_VER=${releasever}" >> $GITHUB_ENV
          echo "GOPATH=${{ github.workspace }}" >> $GITHUB_ENV
      - name: Checkout containerd
        uses: actions/checkout@v2
        with:
          # Intentionally use github.repository instead of containerd/containerd to
          # make this action runnable on forks.
          # See https://github.com/containerd/containerd/issues/5098 for the context.
          repository: ${{ github.repository }}
          ref: ${{ github.ref }}
          path: src/github.com/containerd/containerd

      - name: Setup buildx instance
        uses: docker/setup-buildx-action@v1
        with:
          use: true
      - uses: crazy-max/ghaction-github-runtime@v1 # sets up needed vars for caching to github
      - name: Make
        shell: bash
        run: |
          cache="--cache-from=type=gha,scope=containerd-release --cache-to=type=gha,scope=containerd-release"
          if [[ "${PLATFORM}" =~ "windows" ]]; then
            # For Windows the cni build script generates a config but shells out to powershell (and also assume it is running on windows) to get a gateway and subnet.
            # The values provided here are taken from packages that we previously generated.
            export GATEWAY=172.21.16.1
            export PREFIX_LEN=12
            BUILD_ARGS="--build-arg GATEWAY --build-arg PREFIX_LEN"
          fi
          docker buildx build ${cache} --build-arg RELEASE_VER --build-arg GO_VERSION ${BUILD_ARGS} -f .github/workflows/release/Dockerfile --platform=${PLATFORM} -o releases/ .
          echo PLATFORM_CLEAN=${PLATFORM/\//-} >> $GITHUB_ENV

          # Remove symlinks since we don't want these in the release Artifacts
          find ./releases/ -maxdepth 1 -type l | xargs rm
        working-directory: src/github.com/containerd/containerd
        env:
          GO_VERSION: '1.17.2'
          PLATFORM: ${{ matrix.platform }}
      - name: Save Artifacts
        uses: actions/upload-artifact@v2
        with:
          name: release-tars-${{env.PLATFORM_CLEAN}}
          path: src/github.com/containerd/containerd/releases/*.tar.gz*

  release:
    name: Create containerd Release
    runs-on: ubuntu-18.04
    timeout-minutes: 10
    needs: [build, check]
    steps:
      - name: Download builds and release notes
        uses: actions/download-artifact@v2
        with:
          path: builds
      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fail_on_unmatched_files: true
          name: containerd ${{ needs.check.outputs.stringver }}
          draft: false
          prerelease: ${{ contains(github.ref, 'beta') || contains(github.ref, 'rc') }}
          body_path: ./builds/containerd-release-notes/release-notes.md
          files: |
            builds/release-tars-**/*