fix ts lint

Author: tinayuangao

tools/gulp/tasks/screenshots.ts

@@ -3,7 +3,10 @@ import {readdirSync, statSync, existsSync, mkdirp, readFileSync, writeFileSync}
 import * as path from 'path';
 import * as admin from 'firebase-admin';
 import * as firebase from 'firebase';
-import {openScreenshotsBucket, openFirebaseScreenshotsDatabase, connectFirebaseScreenshots} from '../util/firebase';
+import {
+  openScreenshotsBucket,
+  openFirebaseScreenshotsDatabase,
+  connectFirebaseScreenshots} from '../util/firebase';
 import {setGithubStatus} from '../util/github';
 
 const imageDiff = require('image-diff');
@@ -47,7 +50,8 @@ function updateResult(database: firebase.database.Database, prNumber: string, re
   return getPullRequestRef(database, prNumber).child('result').set(result).then(() => result);
 }
 
-function getPullRequestRef(database: firebase.database.Database | admin.database.Database, prNumber: string) {
+function getPullRequestRef(database: firebase.database.Database | admin.database.Database,
+                           prNumber: string) {
   return database.ref(FIREBASE_REPORT).child(prNumber).child(getSecureToken());
 }
 
@@ -65,13 +69,16 @@ function getScreenshotFiles(database: firebase.database.Database) {
   mkdirp(path.join(SCREENSHOT_DIR, `golds`));
   mkdirp(path.join(SCREENSHOT_DIR, `diff`));
 
-  return database.ref('screenshot/goldens').once('value').then((snapshot: firebase.database.DataSnapshot) => {
+  return database.ref('screenshot/goldens').once('value')
+      .then((snapshot: firebase.database.DataSnapshot) => {
     let counter = 0;
     snapshot.forEach((childSnapshot: firebase.database.DataSnapshot) => {
       let key = childSnapshot.key;
       let binaryData = new Buffer(childSnapshot.val(), 'base64').toString('binary');
       writeFileSync(`${SCREENSHOT_DIR}/golds/${key}.screenshot.png`, binaryData, 'binary');
-      if (++counter == snapshot.numChildren()) return true;
+      if (++counter == snapshot.numChildren()) {
+        return true;
+      }
     });
   }).catch((error: any) => console.log(error));
 }
@@ -101,7 +108,8 @@ function getSecureToken() {
  *   If the images are the test results, mode should be 'test'.
  *   If the images are the diff images generated, mode should be 'diff'.
  */
-function uploadScreenshotsData(database: firebase.database.Database, mode: 'test' | 'diff', prNumber: string) {
+function uploadScreenshotsData(database: firebase.database.Database,
+                               mode: 'test' | 'diff', prNumber: string) {
   let localDir = mode == 'diff' ? path.join(SCREENSHOT_DIR, 'diff') : SCREENSHOT_DIR;
   let promises: any[] = [];
   getLocalScreenshotFiles(localDir).forEach((file: string) => {
@@ -192,4 +200,4 @@ function uploadScreenshots() {
     promises.push(bucket.upload(fileName, { destination: destination }));
   });
   return Promise.all(promises);
-}
+}