release.yml

name: Make Release
# Create a release on the given branch
# Release and tag name format will be <version>-<branch>
# The body of the release will be created from the changelog.txt or news element in the addon.xml.in

on: workflow_dispatch

jobs:
  default:
    runs-on: ubuntu-latest
    name: Make Release

    steps:

      # Checkout the current repository into a directory (repositories name)
      - name: Checkout Repository
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          path: ${{ github.event.repository.name }}

      # Install all dependencies required by the following steps
      # - libxml2-utils, xmlstarlet: reading news and version from addon.xml.in
      - name: Install dependencies
        run: |
          sudo apt-get install libxml2-utils xmlstarlet

      # Create the variables required by the following steps
      # - steps.required-variables.outputs.changes: latest entry in the changelog.txt (if exists), or addon.xml.in news element
      # - steps.required-variables.outputs.version: version element from addon.xml.in
      # - steps.required-variables.outputs.branch: branch of the triggering ref
      - name: Get required variables
        id: required-variables
        run: |
          changes=$(cat "$(find . -name changelog.txt)" | awk -v RS= 'NR==1')
          if [ -z "$changes" ] ;
          then
            changes=$(xmlstarlet fo -R "$(find . -name addon.xml.in)" | xmlstarlet sel -t -v 'string(/addon/extension/news)' | awk -v RS= 'NR==1')
          fi
          changes="${changes//'%'/'%25'}"
          changes="${changes//$'\n'/'%0A'}"
          changes="${changes//$'\r'/'%0D'}"
          changes="${changes//$'\\n'/'%0A'}"
          changes="${changes//$'\\r'/'%0D'}"
          echo ::set-output name=changes::$changes
          version=$(xmlstarlet fo -R "$(find . -name addon.xml.in)" | xmlstarlet sel -t -v 'string(/addon/@version)')
          echo ::set-output name=version::$version
          branch=$(echo ${GITHUB_REF#refs/heads/})
          echo ::set-output name=branch::$branch
        working-directory: ${{ github.event.repository.name }}

      # Create a release at {steps.required-variables.outputs.branch}
      # - tag and release name format: {steps.required-variables.outputs.version}-{steps.required-variables.outputs.branch} ie. 1.0.0-Matrix
      # - release body: {steps.required-variables.outputs.changes}
      - name: Create Release
        id: create-release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.required-variables.outputs.version }}-${{ steps.required-variables.outputs.branch }}
          release_name: ${{ steps.required-variables.outputs.version }}-${{ steps.required-variables.outputs.branch }}
          body: ${{ steps.required-variables.outputs.changes }}
          draft: false
          prerelease: false
          commitish: ${{ steps.required-variables.outputs.branch }}