tools: ping TSC members identified as inactive

When detecting TSC members as inactive, @-mention them in the pull
request that moves them to emeritus. This notifies them in case the pull
request is in error.

.github/workflows/find-inactive-tsc.yml

@@ -32,7 +32,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
 
       - name: Find inactive TSC members
-        run: tools/find-inactive-tsc.mjs
+        run: tools/find-inactive-tsc.mjs >> $GITHUB_ENV
 
       - name: Open pull request
         uses: gr2m/create-or-update-pull-request-action@v1
@@ -41,7 +41,10 @@ jobs:
         with:
           author: Node.js GitHub Bot <github-bot@iojs.org>
           branch: actions/inactive-tsc
-          body: This PR was generated by tools/find-inactive-tsc.yml.
+          body: |
+            This PR was generated by tools/find-inactive-tsc.yml.
+
+            In case there was an error: ${{ env.INACTIVE_TSC_MEMBERS }}
           commit-message: "meta: move one or more TSC members to emeritus"
           labels: meta
           title: "meta: move one or more TSC members to emeritus"

tools/find-inactive-tsc.mjs

@@ -96,6 +96,8 @@ async function getAttendance(tscMembers, meetings) {
         if (match) {
           return match[1];
         }
+        // Using `console.warn` so that stdout output is not generated.
+        // The stdout output is consumed in find-inactive-tsc.yml.
         console.warn(`Attendee entry does not contain GitHub handle: ${line}`);
         return '';
       })
@@ -251,10 +253,13 @@ const noVotes = tscMembers.filter(
 const inactive = lightAttendance.filter((member) => noVotes.includes(member));
 
 if (inactive.length) {
-  console.log('\nInactive TSC members:\n');
-  console.log(inactive.map((entry) => `* ${entry}`).join('\n'));
-  console.log('\nGenerating new README.md file...');
+  // The stdout output is consumed in find-inactive-tsc.yml. If format of output
+  // changes, find-inactive-tsc.yml may need to be updated.
+  console.log(`INACTIVE_TSC_HANDLES="${inactive.map((entry) => '@' + entry).join(' ')}"`);
+  // Using console.warn() to avoid messing with find-inactive-tsc which consumes
+  // stdout.
+  console.warn('Generating new README.md file...');
   const newReadmeText = await moveTscToEmeritus(inactive);
   fs.writeFileSync(new URL('../README.md', import.meta.url), newReadmeText);
-  console.log('Updated README.md generated. Please commit these changes.');
+  console.warn('Updated README.md generated. Please commit these changes.');
 }