name: Release

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

jobs:
  release:
    name: Release
    strategy:
      matrix:
        os: [ ubuntu-latest ]
        go-version: [ 1.14.x ]
    runs-on: ${{ matrix.os }}

    steps:
    - name: Install Go
      uses: actions/setup-go@v1
      with:
        go-version: ${{ matrix.go-version }}

    - name: Checkout code
      uses: actions/checkout@v2

    # So GoReleaser can generate the changelog properly
    - name: Unshallowify the repo clone
      run: git fetch --prune --unshallow

    # 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::$(git rev-parse --short HEAD)"
        echo "::set-output name=go_cache::$(go env GOCACHE)"

        # 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}"

    - name: Cache the build cache
      uses: actions/cache@v1
      with:
        path: ${{ steps.vars.outputs.go_cache }}
        key: ${{ runner.os }}-go-release-${{ hashFiles('**/go.sum') }}
        restore-keys: |
          ${{ runner.os }}-go-release

    # GoReleaser will take care of publishing those artifacts into the release
    - name: Run GoReleaser
      uses: goreleaser/goreleaser-action@v1
      with:
        version: latest
        args: release --rm-dist
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        TAG: ${{ steps.vars.outputs.version_tag }}

    # Only publish on non-special tags (e.g. non-beta)
    - name: Publish .deb to Gemfury
      if: ${{ steps.vars.outputs.tag_special == '' }}
      env:
        GEMFURY_PUSH_TOKEN: ${{ secrets.GEMFURY_PUSH_TOKEN }}
      run: |
        for filename in dist/*.deb; do
          curl -F package=@"$filename" https://${GEMFURY_PUSH_TOKEN}:@push.fury.io/caddy/
        done