feat: add timestamp to log output

src/index.mjs

@@ -1,4 +1,5 @@
 import dotenv from 'dotenv';
+import logger from './lib/logger.mjs';
 import createRepo from './lib/create_repo.mjs';
 import getComments from './lib/get_comments.mjs';
 import getPull from './lib/get_pull.mjs';
@@ -13,6 +14,7 @@ dotenv.config();
 async function ghActionBot() {
   // parse repo name from cli and create repo instance
   const repo = createRepo(process.argv.splice(2)[0]);
+
   const {
     COMMENT_BODY_REGEXP,
     COMMENT_BODY_REGEXP_FLAGS,
@@ -55,11 +57,11 @@ async function ghActionBot() {
     })
   )).filter(Boolean);
 
-  console.log(`Found ${records.length} outstanding failures`);
+  logger.log(`Found ${records.length} outstanding failures`);
 
   await Promise.all(
     records.map(async record => {
-      console.log(`Re-testing PR #${record.pull.number}`);
+      logger.log(`Re-testing PR #${record.pull.number}`);
       const comment = await createComment(repo, records[0].pull.number, PULL_RETEST_BODY);
       await deleteComment(repo, comment.id);
     })
@@ -68,7 +70,7 @@ async function ghActionBot() {
 
 export default function() {
   return ghActionBot().catch(err => {
-    console.error(err);
+    logger.error(err);
     return process.exit(1);
   });
 }

src/lib/logger.mjs

@@ -0,0 +1,16 @@
+/* eslint no-console: 0 */
+const wrapMessage = msg => `${new Date()}: ${msg.join(' ')}`;
+
+const logger = {
+  log(...args) {
+    console.log(wrapMessage(args));
+  },
+  warn(...args) {
+    console.warn(wrapMessage(args));
+  },
+  error(...args) {
+    console.error(wrapMessage(args));
+  },
+};
+
+export default logger;