name: Release

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

jobs:
  build:

    runs-on: ubuntu-20.04

    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Load Go version
      id: go-version
      run: |
        echo ::set-output name=go-version::$(sed 's/^.*://' .github/go/Dockerfile)

    - uses: actions/setup-go@v2
      with:
        go-version: ${{ steps.go-version.outputs.go-version }}

    - name: Select custom release notes
      id: release-notes
      run: |
        RELNOTES="docs/release-notes/RELEASE-${GITHUB_REF#refs/tags/}.md"
        [[ -f "$RELNOTES" ]] && echo ::set-output name=ARGS::--release-notes $RELNOTES || true

    - name: Docker Login
      run: |
        username="${{ secrets.DOCKERHUB_USERNAME }}"
        password="${{ secrets.DOCKERHUB_PASSWORD }}"
        echo "$password" | docker login --username "$username" --password-stdin

    - uses: goreleaser/goreleaser-action@v2
      with:
        args: release --rm-dist ${{ steps.release-notes.outputs.ARGS }}
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}