github-release.yml

name: Create GitHub Release from Tag

on:
  push:
    tags:
      - "v*"

permissions:
  contents: write

concurrency:
  group: github-release-${{ github.ref }}
  cancel-in-progress: false

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v7
        with:
          ref: ${{ github.sha }}
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v7
        with:
          node-version: 22.22.1

      - name: Verify tag matches package.json version
        id: version
        env:
          TAG_NAME: ${{ github.ref_name }}
        run: |
          set -euo pipefail

          PKG_VERSION=$(node -p "require('./package.json').version")
          EXPECTED_TAG="v${PKG_VERSION}"

          if [[ "${TAG_NAME}" != "${EXPECTED_TAG}" ]]; then
            echo "Tag ${TAG_NAME} does not match package.json version ${PKG_VERSION} (expected ${EXPECTED_TAG})."
            exit 1
          fi

          echo "tag_name=${TAG_NAME}" >> "$GITHUB_OUTPUT"
          echo "pkg_version=${PKG_VERSION}" >> "$GITHUB_OUTPUT"

      - name: Create GitHub Release
        env:
          GH_TOKEN: ${{ github.token }}
          TAG_NAME: ${{ steps.version.outputs.tag_name }}
          PKG_VERSION: ${{ steps.version.outputs.pkg_version }}
        run: |
          set -euo pipefail

          if gh release view "${TAG_NAME}" >/dev/null 2>&1; then
            echo "Release ${TAG_NAME} already exists; skipping creation."
            exit 0
          fi

          PRERELEASE_FLAG=()
          if [[ "${PKG_VERSION}" == *"-"* ]]; then
            PRERELEASE_FLAG=(--prerelease)
          fi

          gh release create "${TAG_NAME}" \
            --title "${TAG_NAME}" \
            --generate-notes \
            "${PRERELEASE_FLAG[@]}"