name: release
on:
  push:
    branches:
      - master
    tags:
      - 'v*.*.*'

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      # Bump version on merging Pull Requests with specific labels.
      # (bump:major,bump:minor,bump:patch)
      - id: bumpr
        if: "!startsWith(github.ref, 'refs/tags/')"
        uses: haya14busa/action-bumpr@v1

      # Update corresponding major and minor tag.
      # e.g. Update v1 and v1.2 when releasing v1.2.3
      - uses: haya14busa/action-update-semver@v1
        if: "!steps.bumpr.outputs.skip"
        with:
          tag: ${{ steps.bumpr.outputs.next_version }}

      # Get tag name.
      - id: tag
        uses: haya14busa/action-cond@v1
        with:
          cond: "${{ startsWith(github.ref, 'refs/tags/') }}"
          if_true: ${{ github.ref }}
          if_false: ${{ steps.bumpr.outputs.next_version }}

      # Create release.
      - uses: actions/create-release@v1
        if: "steps.tag.outputs.value != ''"
        env:
          # This token is provided by Actions, you do not need to create your own token
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.tag.outputs.value }}
          release_name: Release ${{ steps.tag.outputs.value }}
          body: ${{ steps.bumpr.outputs.message }}
          draft: false
          prerelease: false