pr-migration-auto-close.yml

name: Auto-Close PRs

on:
  schedule:
     # Runs every second day at noon UTC
    - cron: '0 12 */2 * *'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  close-stale-prs:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
      issues: write

    steps:
      - name: Close PRs labeled "auto-close"
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo;
            const label = "auto-close";
            const now = new Date();
            const millisecondsInADay = 24 * 60 * 60 * 1000;
            const autoCloseDays = 30; // how many days before PRs should be closed automatically

            // Fetch all open PRs
            const prs = await github.paginate(github.rest.pulls.list, {
              owner,
              repo,
              state: "open",
              per_page: 100
            });

            for (const pr of prs) {
              // Check if PR has the "auto-close" label
              if (!pr.labels.some(l => l.name === label)) continue;

              // Get the PR's label event timeline
              const events = await github.paginate(github.rest.issues.listEvents, {
                owner,
                repo,
                issue_number: pr.number
              });

              // Find the label added event
              const labelEvent = events.find(e => e.event === "labeled" && e.label.name === label);

              const timeSinceLabeled = Math.floor((now - new Date(labelEvent.created_at)) / millisecondsInADay);

              // If label added event found and is older than autoCloseDays days, close the PR
              if (labelEvent && timeSinceLabeled >= autoCloseDays) {
                console.log(`Closing PR #${pr.number}`);
                
                // Close the PR
                await github.rest.pulls.update({
                  owner,
                  repo,
                  pull_number: pr.number,
                  state: "closed"
                });

                const commentBody = 
                  "# Automatic PR Closure Notice\n" +
                  "## Information\n" +
                  "This PR has been closed automatically. It was marked with the `auto-close` [label](https://github.com/oneapi-src/unified-runtime/labels/auto-close) 30 days ago as part of the Unified Runtime source code migration to the intel/llvm repository - https://github.com/intel/llvm/pull/17043.\n\n" +
                  "All Unified Runtime development should be done in [intel/llvm](https://github.com/intel/llvm/tree/sycl/unified-runtime), details can be found in the updated [contribution guide](https://oneapi-src.github.io/unified-runtime/core/CONTRIB.html).\n" +
                  "This repository will continue to exist as a mirror and will host the [specification documentation](https://oneapi-src.github.io/unified-runtime/).\n\n" +
                  "## Next Steps\n" +
                  "Should you wish to re-open this PR it **must be moved** to [intel/llvm](https://github.com/intel/llvm/tree/sycl/unified-runtime). We have provided a [script to help automate this process](https://github.com/oneapi-src/unified-runtime/blob/main/scripts/move-pr-to-intel-llvm.py), otherwise no actions are required.\n\n" +
                  "---\n" +
                  "*This is an automated comment.*";

                // Comment on the PR
                await github.rest.issues.createComment({
                  owner,
                  repo,
                  issue_number: pr.number,
                  body: commentBody
                });
              }
            }