Apply consistent-return lint rule

lib/cache.js

@@ -50,7 +50,7 @@ function connect(callback) {
     mongodb.MongoClient.connect(
       MONGODB_CONNECTION_URL,
       (err, db) => {
-        if (err) return callback(err);
+        if (err) return void callback(err);
 
         mongoDb = db;
         mongoCollection = db.collection("cache");
@@ -58,7 +58,7 @@ function connect(callback) {
 
         const now = Date.now();
         mongoDb.command({ hostInfo: 1 }, (err, res) => {
-          if (err) return callback(err);
+          if (err) return void callback(err);
           mongoTimeOffset = res.system.currentTime.getTime() - now;
           exports.get = mongoGet;
           exports.set = mongoSet;
@@ -133,7 +133,7 @@ function redisLock(lockName, ttl, callback) {
   }
 
   redisClient.set(lockName, token, "NX", "EX", ttl, (err, res) => {
-    if (err || res) return callback(err, unlockOrExtend);
+    if (err || res) return void callback(err, unlockOrExtend);
 
     setTimeout(() => {
       redisLock(lockName, ttl, callback);
@@ -145,7 +145,7 @@ function mongoGet(key, callback) {
   let expire = new Date(Date.now() - mongoTimeOffset);
   if (Array.isArray(key)) {
     mongoCollection.find({ _id: { $in: key } }).toArray((err, res) => {
-      if (err) return callback(err);
+      if (err) return void callback(err);
 
       let indices = {};
       key.forEach((v, i) => {
@@ -160,9 +160,9 @@ function mongoGet(key, callback) {
     });
   } else {
     mongoCollection.findOne({ _id: { $in: [key] } }, (err, res) => {
-      if (err || !res) return callback(err);
+      if (err || !res) return void callback(err);
 
-      if (res["expire"] > expire) return callback(null, res["value"]);
+      if (res["expire"] > expire) return void callback(null, res["value"]);
 
       callback();
     });
@@ -194,10 +194,10 @@ function mongoPop(key, callback) {
     null,
     { remove: true },
     (err, res) => {
-      if (err || !res["value"]) return callback(err);
+      if (err || !res["value"]) return void callback(err);
 
       if (res["value"]["expire"] > new Date(Date.now() - mongoTimeOffset))
-        return callback(null, res["value"]["value"]);
+        return void callback(null, res["value"]["value"]);
 
       callback();
     }