name: Release

on:
  push:
    tags:
      - 'v*.*.*'

jobs:
  release:
    name: Release
    strategy:
      matrix:
        os: [ ubuntu-latest ]
        go: [ '1.19' ]

        include:
        # Set the minimum Go patch version for the given Go minor
        # Usable via ${{ matrix.GO_SEMVER }}
        - go: '1.19'
          GO_SEMVER: '~1.19.0'

    runs-on: ${{ matrix.os }}
    # https://github.com/sigstore/cosign/issues/1258#issuecomment-1002251233
    # https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect#adding-permissions-settings
    permissions:
      id-token: write
      # https://docs.github.com/en/rest/overview/permissions-required-for-github-apps#permission-on-contents
      # "Releases" is part of `contents`, so it needs the `write`
      contents: write

    steps:
    - name: Install Go
      uses: actions/setup-go@v3
      with:
        go-version: ${{ matrix.GO_SEMVER }}
        check-latest: true

    - name: Checkout code
      uses: actions/checkout@v3
      with:
        fetch-depth: 0

    # Force fetch upstream tags -- because 65 minutes
    # tl;dr: actions/checkout@v3 runs this line:
    #   git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +ebc278ec98bb24f2852b61fde2a9bf2e3d83818b:refs/tags/
    # which makes its own local lightweight tag, losing all the annotations in the process. Our earlier script ran:
    #   git fetch --prune --unshallow
    # which doesn't overwrite that tag because that would be destructive.
    # Credit to @francislavoie for the investigation.
    # https://github.com/actions/checkout/issues/290#issuecomment-680260080
    - name: Force fetch upstream tags
      run: git fetch --tags --force

    # https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
    - name: Print Go version and environment
      id: vars
      run: |
        printf "Using go at: $(which go)\n"
        printf "Go version: $(go version)\n"
        printf "\n\nGo environment:\n\n"
        go env
        printf "\n\nSystem environment:\n\n"
        env
        echo "::set-output name=version_tag::${GITHUB_REF/refs\/tags\//}"
        echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"

        # Add "pip install" CLI tools to PATH
        echo ~/.local/bin >> $GITHUB_PATH

        # Parse semver
        TAG=${GITHUB_REF/refs\/tags\//}
        SEMVER_RE='[^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z\.-]*\)'
        TAG_MAJOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\1#"`
        TAG_MINOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\2#"`
        TAG_PATCH=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\3#"`
        TAG_SPECIAL=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\4#"`
        echo "::set-output name=tag_major::${TAG_MAJOR}"
        echo "::set-output name=tag_minor::${TAG_MINOR}"
        echo "::set-output name=tag_patch::${TAG_PATCH}"
        echo "::set-output name=tag_special::${TAG_SPECIAL}"

    # Cloudsmith CLI tooling for pushing releases
    # See https://help.cloudsmith.io/docs/cli
    - name: Install Cloudsmith CLI
      run: pip install --upgrade cloudsmith-cli

    - name: Validate commits and tag signatures
      run: |
        
        # Import Matt Holt's key
        curl 'https://github.com/mholt.gpg' | gpg --import

        echo "Verifying the tag: ${{ steps.vars.outputs.version_tag }}"
        # tags are only accepted if signed by Matt's key
        git verify-tag "${{ steps.vars.outputs.version_tag }}" || exit 1

    - name: Cache the build cache
      uses: actions/cache@v2
      with:
        # In order:
        # * Module download cache
        # * Build cache (Linux)
        path: |
          ~/go/pkg/mod
          ~/.cache/go-build
        key: ${{ runner.os }}-go${{ matrix.go }}-release-${{ hashFiles('**/go.sum') }}
        restore-keys: |
          ${{ runner.os }}-go${{ matrix.go }}-release
    - name: Install Cosign
      uses: sigstore/cosign-installer@main
    - name: Cosign version
      run: cosign version
    - name: Install Syft
      uses: anchore/sbom-action/download-syft@main
    - name: Syft version
      run: syft version
    # GoReleaser will take care of publishing those artifacts into the release
    - name: Run GoReleaser
      uses: goreleaser/goreleaser-action@v2
      with:
        version: latest
        args: release --rm-dist
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        TAG: ${{ steps.vars.outputs.version_tag }}
        COSIGN_EXPERIMENTAL: 1

    # Only publish on non-special tags (e.g. non-beta)
    # We will continue to push to Gemfury for the foreseeable future, although
    # Cloudsmith is probably better, to not break things for existing users of Gemfury.
    # See https://gemfury.com/caddy/deb:caddy
    - name: Publish .deb to Gemfury
      if: ${{ steps.vars.outputs.tag_special == '' }}
      env:
        GEMFURY_PUSH_TOKEN: ${{ secrets.GEMFURY_PUSH_TOKEN }}
      run: |
        for filename in dist/*.deb; do
          # armv6 and armv7 are both "armhf" so we can skip the duplicate
          if [[ "$filename" == *"armv6"* ]]; then
            echo "Skipping $filename"
            continue
          fi

          curl -F package=@"$filename" https://${GEMFURY_PUSH_TOKEN}:@push.fury.io/caddy/
        done

    # Publish only special tags (unstable/beta/rc) to the "testing" repo
    # See https://cloudsmith.io/~caddy/repos/testing/
    - name: Publish .deb to Cloudsmith (special tags)
      if: ${{ steps.vars.outputs.tag_special != '' }}
      env:
        CLOUDSMITH_API_KEY: ${{ secrets.CLOUDSMITH_API_KEY }}
      run: |
        for filename in dist/*.deb; do
          # armv6 and armv7 are both "armhf" so we can skip the duplicate
          if [[ "$filename" == *"armv6"* ]]; then
            echo "Skipping $filename"
            continue
          fi

          echo "Pushing $filename to 'testing'"
          cloudsmith push deb caddy/testing/any-distro/any-version $filename
        done

    # Publish stable tags to Cloudsmith to both repos, "stable" and "testing"
    # See https://cloudsmith.io/~caddy/repos/stable/
    - name: Publish .deb to Cloudsmith (stable tags)
      if: ${{ steps.vars.outputs.tag_special == '' }}
      env:
        CLOUDSMITH_API_KEY: ${{ secrets.CLOUDSMITH_API_KEY }}
      run: |
        for filename in dist/*.deb; do
          # armv6 and armv7 are both "armhf" so we can skip the duplicate
          if [[ "$filename" == *"armv6"* ]]; then
            echo "Skipping $filename"
            continue
          fi

          echo "Pushing $filename to 'stable'"
          cloudsmith push deb caddy/stable/any-distro/any-version $filename

          echo "Pushing $filename to 'testing'"
          cloudsmith push deb caddy/testing/any-distro/any-version $filename
        done