Create close-old-pr.yml

.github/workflows/close-old-pr.yml

@@ -0,0 +1,47 @@
+name: Close PRs Without Linked Issues
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  close_prs_without_issue:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check and Close PRs Without Linked Issues
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # This ensures that git history is fully fetched for proper processing
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Close PRs Without Linked Issues
+        run: |
+          const daysThreshold = 30;
+
+          const github = require('@actions/github');
+
+          const octokit = new github.GitHub(process.env.GITHUB_TOKEN);
+
+          const owner = github.context.repo.owner;
+          const repo = github.context.repo.repo;
+
+          const { data: pullRequests } = await octokit.pulls.list({ owner, repo, state: 'open' });
+
+          for (const pr of pullRequests) {
+            const { data: issues } = await octokit.issues.listForRepo({ owner, repo, per_page: 100 });
+
+            const linkedIssue = issues.find(issue =>
+              issue.pull_request && issue.pull_request.url === pr.url
+            );
+
+            if (!linkedIssue) {
+              await octokit.pulls.update({ owner, repo, pull_number: pr.number, state: 'closed' });
+              await octokit.issues.createComment({
+                owner,
+                repo,
+                issue_number: pr.number,
+                body: "This pull request has been closed because it does not mention the issue that it solves. Please refer to the [Contributing files](https://github.com/Akshat111111/Hedging-of-Financial-Derivatives/blob/main/contributing.md) to help you add this information. Then, tag the maintainers so your PR can be reopened."
+              });
+            }
+          }