release.yml

name: Build and publish release

on:
  push:
    tags:
      - "v[0-9]*"

permissions:
  contents: write

jobs:
  build-and-release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 1

      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - name: Verify release tag matches package version
        env:
          RELEASE_TAG: ${{ github.ref_name }}
        run: |
          python - <<'PY'
          import os
          import re
          from pathlib import Path

          tag = os.environ["RELEASE_TAG"]
          match = re.fullmatch(r"v(\d+\.\d+\.\d+)", tag)
          source = Path("spectroview/__init__.py").read_text(encoding="utf-8")
          version = re.search(r'^VERSION\s*=\s*["\']([^"\']+)["\']', source, re.M)
          if not match or version is None or version.group(1) != match.group(1):
              raise SystemExit(
                  "Release tags must be vMAJOR.MINOR.PATCH and match "
                  "spectroview.VERSION."
              )
          PY

      - name: Build and validate distributions
        run: |
          python -m pip install --upgrade build twine
          python -m build
          python -m twine check dist/*

      - uses: actions/upload-artifact@v4
        with:
          name: python-distributions
          path: dist/
          if-no-files-found: error

      - name: Create GitHub release and attach distributions
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh release create "$GITHUB_REF_NAME" dist/* \
            --repo "$GITHUB_REPOSITORY" \
            --title "$GITHUB_REF_NAME" \
            --notes "The installable wheel is attached below and is used by SPECTROview's automatic updater." \
            --generate-notes \
            --verify-tag

  publish-pypi:
    needs: build-and-release
    runs-on: ubuntu-latest
    environment:
      name: pypi
      url: https://pypi.org/p/spectroview
    permissions:
      id-token: write
    steps:
      - uses: actions/download-artifact@v4
        with:
          name: python-distributions
          path: dist/

      - name: Publish distributions to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1