release-please.yml

name: Release On Version Bump

on:
  push:
    branches: [main]

permissions:
  contents: write
  actions: write

jobs:
  create-release:
    name: Create Release
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Detect version bump
        id: detect
        shell: bash
        env:
          BEFORE_SHA: ${{ github.event.before }}
        run: |
          set -euo pipefail

          CURRENT_VERSION="$(jq -r '.version' package.json)"
          TAG_NAME="v${CURRENT_VERSION}"

          echo "current_version=$CURRENT_VERSION" >> "$GITHUB_OUTPUT"
          echo "tag_name=$TAG_NAME" >> "$GITHUB_OUTPUT"

          # First push to branch or unknown previous commit
          if [[ -z "${BEFORE_SHA}" || "${BEFORE_SHA}" =~ ^0+$ ]]; then
            echo "should_release=false" >> "$GITHUB_OUTPUT"
            echo "reason=before_sha_unavailable" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          PREV_VERSION="$(git show "${BEFORE_SHA}:package.json" 2>/dev/null | jq -r '.version' 2>/dev/null || true)"

          if [[ -z "${PREV_VERSION}" ]]; then
            echo "should_release=false" >> "$GITHUB_OUTPUT"
            echo "reason=previous_version_unavailable" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          if [[ "$CURRENT_VERSION" == "$PREV_VERSION" ]]; then
            echo "should_release=false" >> "$GITHUB_OUTPUT"
            echo "reason=version_unchanged" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          if git ls-remote --exit-code --tags origin "refs/tags/${TAG_NAME}" >/dev/null 2>&1; then
            echo "should_release=false" >> "$GITHUB_OUTPUT"
            echo "reason=tag_exists" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "previous_version=$PREV_VERSION" >> "$GITHUB_OUTPUT"
          echo "should_release=true" >> "$GITHUB_OUTPUT"
          echo "reason=version_changed" >> "$GITHUB_OUTPUT"

      - name: Log decision
        shell: bash
        run: |
          echo "Decision: ${{ steps.detect.outputs.reason }}"
          echo "Current version: ${{ steps.detect.outputs.current_version }}"
          echo "Tag: ${{ steps.detect.outputs.tag_name }}"

      - name: Create GitHub release
        if: steps.detect.outputs.should_release == 'true'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.detect.outputs.tag_name }}
          target_commitish: ${{ github.sha }}
          generate_release_notes: true