release-on-version-change.yml

name: Release on Version Change

on:
  push:
    branches:
      - main

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up Node.js (if needed for JSON processing)
        uses: actions/setup-node@v3
        with:
          node-version: '16'

      - name: Detect changes to manifest.json
        id: detect-changes
        run: |
          if git diff --name-only HEAD^ HEAD | grep -q "custom_components/eldom/manifest.json"; then
            echo "manifest.json was modified."
            echo "changed=true" >> $GITHUB_ENV
          else
            echo "manifest.json was not modified."
            echo "changed=false" >> $GITHUB_ENV
          fi

      - name: Extract new version
        id: extract-version
        if: env.changed == 'true'
        run: |
          VERSION=$(jq -r '.version' custom_components/eldom/manifest.json)
          echo "Extracted version: $VERSION"
          echo "version=$VERSION" >> $GITHUB_ENV

      - name: Get previous tag
        id: previous-tag
        if: env.changed == 'true'
        run: |
          PREVIOUS_TAG=$(git describe --tags --abbrev=0 HEAD^)
          echo "Previous tag: $PREVIOUS_TAG"
          echo "previous_tag=$PREVIOUS_TAG" >> $GITHUB_ENV

      - name: Generate changelog
        id: generate-changelog
        if: env.changed == 'true'
        run: |
          echo "Generating changelog..."
          CHANGELOG=$(git log ${{ env.previous_tag }}..HEAD --pretty=format:"- %s (%h)")
          echo "Changelog: $CHANGELOG"
          echo "changelog=$CHANGELOG" >> $GITHUB_ENV

      - name: Create GitHub Release
        if: env.changed == 'true'
        uses: actions/create-release@v1
        with:
          tag_name: "${{ env.version }}"
          release_name: "Version ${{ env.version }}"
          body: |
            ## Changelog
            ${{ env.changelog }}
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Log no release
        if: env.changed == 'false'
        run: echo "No changes to manifest.json. Skipping release creation."