auto-changelog-v3.yml

name: Auto Changelog (v3)

on:
  pull_request:
    branches: [ v3-alpha ]
    types: [ closed ]
  workflow_dispatch:
    inputs:
      pr_number:
        description: 'PR number to process'
        required: true
        type: string

jobs:
  auto-changelog:
    if: github.event.pull_request.merged == true || github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-latest

    permissions:
      contents: write

    steps:
    - name: Checkout v3-alpha
      uses: actions/checkout@v4
      with:
        ref: v3-alpha
        fetch-depth: 0
        token: ${{ secrets.CHANGELOG_PUSH_TOKEN || secrets.GITHUB_TOKEN }}

    - name: Resolve PR number
      id: pr
      run: |
        if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
          echo "number=${{ github.event.inputs.pr_number }}" >> $GITHUB_OUTPUT
        else
          echo "number=${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
        fi

    - name: Check if changelog was updated in PR
      id: check
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        PR_NUMBER: ${{ steps.pr.outputs.number }}
      run: |
        FILES=$(curl -sf \
          -H "Authorization: Bearer $GITHUB_TOKEN" \
          -H "Accept: application/vnd.github+json" \
          "https://api.github.com/repos/${{ github.repository }}/pulls/${PR_NUMBER}/files?per_page=100" \
          | jq -r '.[].filename')
        if echo "$FILES" | grep -q "^v3/UNRELEASED_CHANGELOG.md$"; then
          echo "skip=true" >> $GITHUB_OUTPUT
          echo "✅ Changelog was updated in PR — skipping auto-fill."
        else
          echo "skip=false" >> $GITHUB_OUTPUT
          echo "ℹ️ Changelog not updated — auto-filling."
        fi

    - name: Setup Go
      if: steps.check.outputs.skip == 'false'
      uses: actions/setup-go@v5
      with:
        go-version: '1.23'

    - name: Auto-fill changelog entry
      if: steps.check.outputs.skip == 'false'
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
        GITHUB_REPOSITORY: ${{ github.repository }}
        PR_NUMBER: ${{ steps.pr.outputs.number }}
      run: go run v3/scripts/auto-changelog.go

    - name: Commit and push
      if: steps.check.outputs.skip == 'false'
      env:
        PR_NUMBER: ${{ steps.pr.outputs.number }}
        PR_TITLE: ${{ github.event.pull_request.title }}
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "github-actions[bot]@users.noreply.github.com"
        git add v3/UNRELEASED_CHANGELOG.md
        git commit -m "chore(changelog): auto-add entry for PR #${PR_NUMBER} — ${PR_TITLE}"
        git push https://x-access-token:${{ secrets.CHANGELOG_PUSH_TOKEN || secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git v3-alpha