release.yml

name: Release
on:
  push:
    tags:
      - v?[0-9]+.[0-9]+**
  workflow_call:
    inputs:
      tag:
        description: Target tag
        required: true
        type: string

jobs:
  release:
    name: page
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash

    steps:
      - name: extract tag (version)
        id: version
        run: |
          if [ -z "${{ inputs.tag }}" ]; then
              echo "value=$(echo $GITHUB_REF | cut -d / -f 3)" >> $GITHUB_OUTPUT
          else
              echo "value=${{ inputs.tag }}" >> $GITHUB_OUTPUT
          fi

      # checkout needed for changelog only
      - name: checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
          ref: ${{ steps.version.outputs.value }}

      - id: changelog
        name: Generate Changelog
        continue-on-error: true
        run: |
          git fetch --tags --all --prune-tags --force

          TAG_FIRST=$(git describe --abbrev=0 --tags $(git describe --abbrev=0)^)
          TAG_SECOND=$(git describe --abbrev=0)
          echo "Generating changelog between tags: ${{ steps.version.outputs.value }}...$TAG_FIRST...$TAG_SECOND"

          RESULT_FILE=generated-changelog.md
          RESULT_LOG_ACT="$(git log $TAG_SECOND...${{ steps.version.outputs.value }} --pretty=format:'- %s [·](${{ github.event.repository.html_url }}/commit/%H)' --reverse)"
          RESULT_LOG_POST="$(git log $TAG_FIRST...$TAG_SECOND --pretty=format:'- %s [·](${{ github.event.repository.html_url }}/commit/%H)' --reverse)"

          echo "
          ## TODO: EDIT ME BEFORE PUBLISH

          __Changelog ${{ steps.version.outputs.value }}__…${TAG_SECOND}

          $RESULT_LOG_ACT

          __${TAG_SECOND}__…${TAG_FIRST}

          $RESULT_LOG_POST

          <!-- Built with ♥️. -->
          " > $RESULT_FILE

          echo "file=$RESULT_FILE" >> $GITHUB_OUTPUT

      - id: release
        name: create release "${{ steps.version.outputs.value }}"
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          draft: true
          prerelease: true
          tag_name: ${{ steps.version.outputs.value }}
          release_name: ${{ steps.version.outputs.value }}
          body_path: ${{ steps.changelog.outputs.file }}