cascade-include-changes.yml

name: Cascade Include Changes

on:
  # Automatic: fires when a PR that touches the includes folder is merged into main.
  pull_request:
    types: [closed]
    branches:
      - live
    paths:
      - "shared/dynamics365-core/**"

  # Manual: re-run a cascade when the automatic trigger fails or needs to be retried.
  workflow_dispatch:
    inputs:
      changed_files:
        description: >
          Space-separated list of include file paths, e.g.
          "shared/dynamics365-core/file-a.md shared/dynamics365-core/file-b.md"
        required: true
        type: string
      pr_number:
        description: "Source PR number or URL (e.g. 11830 or https://github.com/.../pull/11830)"
        required: true
        type: string

jobs:
  cascade:
    # For pull_request events: only run when the PR was actually merged.
    # For workflow_dispatch: always run.
    if: github.event_name == 'workflow_dispatch' || github.event.pull_request.merged == true
    runs-on: ubuntu-latest

    steps:
      - name: Checkout source repo
        uses: actions/checkout@v6

      # For automatic runs: fetch the file list from the merged PR.
      # For manual runs: use the value typed into the dispatch form.
      - name: Resolve changed include files
        id: changed
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            FILES="${{ inputs.changed_files }}"
            echo "Manual run — using provided file list: $FILES"
          else
            FILES=$(gh pr view "${{ github.event.pull_request.number }}" \
              --json files \
              --jq '[.files[].path] | join(" ")')
            echo "PR merge — fetched file list: $FILES"
          fi
          echo "files=$FILES" >> "$GITHUB_OUTPUT"
        env:
          GH_TOKEN: ${{ secrets.CASCADE_PAT }}

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.11"

      # No third-party deps needed — script uses stdlib only.

      - name: Cascade include changes to downstream repos
        env:
          # CASCADE_PAT must be a classic PAT with repo scope, stored as a
          # repository secret in the source (includes) repo.
          GITHUB_TOKEN: ${{ secrets.CASCADE_PAT }}
          CHANGED_FILES: ${{ steps.changed.outputs.files }}
          PR_NUMBER: ${{ github.event_name == 'workflow_dispatch' && inputs.pr_number || github.event.pull_request.number }}
          PR_URL: ${{ github.event_name == 'workflow_dispatch' && '' || github.event.pull_request.html_url }}
        run: python scripts/cascade_dates.py

      - name: Post summary comment on source PR
        if: github.event_name == 'pull_request' && success()
        run: |
          gh pr comment "${{ github.event.pull_request.number }}" \
            --repo "${{ github.repository }}" \
            --body-file cascade-summary.md
        env:
          GH_TOKEN: ${{ secrets.CASCADE_PAT }}