.github/workflows/draft-release.yml

# Copyright (C) 2026 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Creates a draft GitHub Release on vX.Y tag push.
#
# The body is pre-populated with the matching CHANGELOG section as a
# starting point. A maintainer is expected to edit it into full prose
# release notes before clicking `finalize-release` to publish.
#
# Idempotent: re-running on an existing tag re-creates the draft only if
# one does not exist; it never clobbers a release that has already been
# published or edited.

name: Draft release

on:
  push:
    tags:
      - 'v[0-9]+.[0-9]+'

permissions:
  contents: write  # Required to create the release

jobs:
  draft:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ github.ref }}

      - name: Extract CHANGELOG section for this tag
        run: |
          python3 tools/release/extract_changelog_section.py \
            "${{ github.ref_name }}" > /tmp/release_body.txt
          echo "--- Draft release body ---"
          cat /tmp/release_body.txt

      - name: Create draft release (if missing)
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          TAG="${{ github.ref_name }}"
          if gh release view "$TAG" > /dev/null 2>&1; then
            echo "Release $TAG already exists — leaving body untouched."
          else
            gh release create "$TAG" \
              --draft \
              --title "Perfetto $TAG" \
              --notes-file /tmp/release_body.txt
          fi