name: New release

on:
  push:
    branches:
      - master

jobs:
  generate_changelog:
    runs-on: ubuntu-latest
    name: create release draft
    steps:
      - uses: actions/checkout@v1

      - name: 'Get Previous tag'
        id: previoustag
        uses: "WyriHaximus/github-action-get-previous-tag@master"
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

      - name: calculate next version
        id: version
        uses: charmixer/auto-changelog-action@8095796
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Generate changelog
        uses: charmixer/auto-changelog-action@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          since_tag: ${{ steps.previoustag.outputs.tag }}
          future_release: ${{ steps.version.outputs.next-version }}

      - name: Read CHANGELOG.md
        id: package
        uses: juliangruber/read-file-action@v1
        with:
          path: ./CHANGELOG.md

      - name: Create Release draft
        id: create_release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # This token is provided by Actions, you do not need to create your own token
        with:
          release_name: ${{ steps.version.outputs.next-version }}
          tag_name: ${{ steps.version.outputs.next-version }}
          body: |
            ${{ steps.package.outputs.content }}
          draft: true