ci: auto-lock discussions and auto-close after 30 days (#39311)

As noted in #39212, it would be useful to prevent "bumping" of old
Discussions.

Because `lock-threads` does not have the ability to perform the closing
itself[0], we can write a small `github-script` compatible script.

This will loop through all answered but open Discussions, and close them
(if it's been 30 days since they were answered).

We also make sure that `lock-threads` will then lock the Discussions
once they're closed.

Closes #39212.

[0]: dessant/lock-threads#45

Co-authored-by: gpt-4.1 <[email protected]>

Author: jamietanna

.github/workflows/close-answered-discussions.yml

@@ -0,0 +1,29 @@
+name: Close answered discussions
+
+permissions:
+  discussions: write
+
+on:
+  # run daily
+  schedule:
+    - cron: '0 0 * * *'
+
+  # allow manual trigger
+  workflow_dispatch:
+
+jobs:
+  close-answered-discussions:
+    runs-on: ubuntu-latest
+    if: github.repository == 'renovatebot/renovate'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          show-progress: false
+
+      - uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const script = require('.github/workflows/close-answered-discussions/script.js')
+            console.log(await script({github, context, discussionAnsweredDays: 30}))

.github/workflows/close-answered-discussions/script.js

@@ -0,0 +1,76 @@
+// Parses the ISO date string and checks it's past the age window
+// Co-authored-by: GPT-4.1 (GitHub Copilot)
+function isOlderThanDaysAgo(dateString, daysAgo) {
+  const parsedDate = new Date(dateString);
+  const now = new Date();
+  const thresholdDate = new Date(now.getTime() - daysAgo * 24 * 60 * 60 * 1000);
+  return parsedDate < thresholdDate;
+}
+
+module.exports = async ({ github, context, discussionAnsweredDays }) => {
+  const owner = context.repo.owner;
+  const repo = context.repo.repo;
+
+  let cursor = null;
+
+  const query = `query ($cursor: String) {
+  repository(owner: "${owner}", name: "${repo}") {
+    discussions(after: $cursor, states: OPEN, answered: true, first: 50, orderBy: {field: CREATED_AT, direction: ASC}) {
+      pageInfo {
+        endCursor
+        hasNextPage
+      }
+      edges {
+        node {
+          id
+          answerChosenAt
+        }
+      }
+    }
+  }
+}`;
+
+  while (true) {
+    console.debug({ cursor }, 'Starting query');
+    const { repository } = await github.graphql(query, { cursor });
+
+    console.debug(
+      `Found ${repository.discussions.edges.length} discussions in this page of data`,
+    );
+
+    let numMutating = 0;
+    let mutation = 'mutation {';
+    for (let i in resp.repository.discussions.edges) {
+      let edge = resp.repository.discussions.edges[i];
+      if (
+        isOlderThanDaysAgo(edge.node.answerChosenAt, discussionAnsweredDays)
+      ) {
+        mutation += `m${i}: closeDiscussion(input: {discussionId: "${edge.node.id}"}) {
+    clientMutationId
+    }\n`;
+        numMutating++;
+      }
+    }
+    mutation += '}';
+
+    if (numMutating > 0) {
+      console.debug(`Attempting the following mutation:\n${mutation}`);
+
+      await github.graphql(mutation);
+
+      console.log(`Closed ${numMutating} answered Discussions`);
+    } else {
+      console.debug(
+        `Did not find any Discussions to close in this page of data`,
+      );
+    }
+
+    if (!resp.repository.discussions.pageInfo.hasNextPage) {
+      break;
+    }
+
+    cursor = resp.repository.discussions.pageInfo.endCursor;
+  }
+
+  return '';
+};

.github/workflows/lock.yml

@@ -9,6 +9,7 @@ on:
   workflow_dispatch:
 
 permissions:
+  discussions: write
   issues: write
   pull-requests: write
 
@@ -24,6 +25,7 @@ jobs:
         if: github.repository == 'renovatebot/renovate'
         with:
           github-token: ${{ github.token }}
+          discussions-inactive-days: 30
           issue-inactive-days: 30
           pr-inactive-days: 30
-          process-only: 'issues, prs'
+          process-only: 'issues, prs, discussions'

eslint.config.mjs

@@ -30,6 +30,7 @@ export default tseslint.config(
       '**/.venv/',
       'tools/mkdocs/docs',
       'tools/mkdocs/site',
+      '.github/workflows/**/*.js',
       '.worktrees/**/*',
     ],
   },

tsconfig.json

@@ -39,6 +39,7 @@
     "tmp",
     "tools/mkdocs/docs",
     "tools/mkdocs/site",
+    ".github/workflows/**/*.js",
     ".worktrees/**/*"
   ],
   "ts-node": {