Apply prefer-const lint rule

lib/cluster.js

@@ -28,13 +28,13 @@ let respawnTimestamp = 0;
 let tooManyCrashesTimestamp = 0;
 
 function getDependencyVersions() {
-  let dependencies = [`node@${process.versions.node}`];
+  const dependencies = [`node@${process.versions.node}`];
   try {
-    let npmls = JSON.parse(
+    const npmls = JSON.parse(
       require("child_process").execSync("npm ls --prod --json --depth 0")
     );
 
-    for (let k in npmls.dependencies)
+    for (const k in npmls.dependencies)
       dependencies.push(`${k}@${npmls.dependencies[k].version}`);
   } catch (err) {
     // Continue regardless of error
@@ -44,9 +44,9 @@ function getDependencyVersions() {
 }
 
 function getConfig() {
-  let conf = [];
+  const conf = [];
   const keys = Object.keys(process.env);
-  for (let k of keys) {
+  for (const k of keys) {
     if (k.startsWith("GENIEACS_")) {
       const name = k.slice(9);
       const value = process.env[k];
@@ -59,7 +59,7 @@ function getConfig() {
 }
 
 function restartWorker(worker, code, signal) {
-  let msg = {
+  const msg = {
     message: "Worker died",
     pid: worker.process.pid
   };
@@ -81,7 +81,7 @@ function restartWorker(worker, code, signal) {
   if (now - tooManyCrashesTimestamp > 60000) {
     process.exitCode = 1;
     cluster.removeListener("exit", restartWorker);
-    for (let pid in cluster.workers) cluster.workers[pid].kill();
+    for (const pid in cluster.workers) cluster.workers[pid].kill();
 
     logger.error({
       message: "Too many crashes, exiting",
@@ -142,7 +142,7 @@ function start(service) {
     });
 
     cluster.removeListener("exit", restartWorker);
-    for (let pid in cluster.workers) cluster.workers[pid].kill();
+    for (const pid in cluster.workers) cluster.workers[pid].kill();
   });
 
   cluster.setupMaster({
@@ -165,7 +165,7 @@ process.on("uncaughtException", err => {
   });
   process.exitCode = 1;
   cluster.removeListener("exit", restartWorker);
-  for (let pid in cluster.workers) cluster.workers[pid].kill();
+  for (const pid in cluster.workers) cluster.workers[pid].kill();
 });
 
 exports.start = start;