chore: fixup patches linting (#26595)

script/lint.js

@@ -164,16 +164,16 @@ const LINTERS = [{
 }, {
   key: 'patches',
   roots: ['patches'],
-  test: () => true,
+  test: filename => filename.endsWith('.patch'),
   run: (opts, filenames) => {
     const patchesDir = path.resolve(__dirname, '../patches');
-    for (const patchTarget of fs.readdirSync(patchesDir)) {
-      const targetDir = path.resolve(patchesDir, patchTarget);
-      // If the config does not exist that is OK, we just skip this dir
-      const targetConfig = path.resolve(targetDir, 'config.json');
-      if (!fs.existsSync(targetConfig)) continue;
+    const patchesConfig = path.resolve(patchesDir, 'config.json');
+    // If the config does not exist, that's a proiblem
+    if (!fs.existsSync(patchesConfig)) {
+      process.exit(1);
+    }
 
-      const config = JSON.parse(fs.readFileSync(targetConfig, 'utf8'));
+    const config = JSON.parse(fs.readFileSync(patchesConfig, 'utf8'));
     for (const key of Object.keys(config)) {
       // The directory the config points to should exist
       const targetPatchesDir = path.resolve(__dirname, '../../..', key);
@@ -207,22 +207,22 @@ const LINTERS = [{
         throw new Error(`Expected all the patch files listed in the .patches file at "${dotPatchesPath}" to exist but some did not:\n${JSON.stringify([...patchFileSet.values()], null, 2)}`);
       }
     }
-    }
 
-    let ok = true;
-    filenames.filter(f => f.endsWith('.patch')).forEach(f => {
+    const allOk = filenames.length > 0 && filenames.map(f => {
       const patchText = fs.readFileSync(f, 'utf8');
-      if (/^Subject: .*$\s+^diff/m.test(patchText)) {
+      const subjectAndDescription = /Subject: (.*?)\n\n([\s\S]*?)\s*(?=diff)/ms.exec(patchText);
+      if (!subjectAndDescription[2]) {
         console.warn(`Patch file '${f}' has no description. Every patch must contain a justification for why the patch exists and the plan for its removal.`);
-        ok = false;
+        return false;
       }
       const trailingWhitespace = patchText.split('\n').filter(line => line.startsWith('+')).some(line => /\s+$/.test(line));
       if (trailingWhitespace) {
         console.warn(`Patch file '${f}' has trailing whitespace on some lines.`);
-        ok = false;
+        return false;
       }
-    });
-    if (!ok) {
+      return true;
+    }).every(x => x);
+    if (!allOk) {
       process.exit(1);
     }
   }