child_process: move exports to bottom for better code style

lib/child_process.js

@@ -51,9 +51,7 @@ const {
 
 const MAX_BUFFER = 1024 * 1024;
 
-exports.ChildProcess = ChildProcess;
-
-exports.fork = function fork(modulePath /* , args, options */) {
+function fork(modulePath /* , args, options */) {
   validateString(modulePath, 'modulePath');
 
   // Get options and args arguments.
@@ -108,10 +106,9 @@ exports.fork = function fork(modulePath /* , args, options */) {
   options.shell = false;
 
   return spawn(options.execPath, args, options);
-};
-
+}
 
-exports._forkChild = function _forkChild(fd) {
+function _forkChild(fd) {
   // set process.send()
   const p = new Pipe(PipeConstants.IPC);
   p.open(fd);
@@ -123,8 +120,7 @@ exports._forkChild = function _forkChild(fd) {
   process.on('removeListener', function onRemoveListener(name) {
     if (name === 'message' || name === 'disconnect') control.unref();
   });
-};
-
+}
 
 function normalizeExecArgs(command, options, callback) {
   if (typeof options === 'function') {
@@ -144,12 +140,12 @@ function normalizeExecArgs(command, options, callback) {
 }
 
 
-exports.exec = function exec(command, options, callback) {
+function exec(command, options, callback) {
   const opts = normalizeExecArgs(command, options, callback);
-  return exports.execFile(opts.file,
-                          opts.options,
-                          opts.callback);
-};
+  return module.exports.execFile(opts.file,
+                                 opts.options,
+                                 opts.callback);
+}
 
 const customPromiseExecFunction = (orig) => {
   return (...args) => {
@@ -167,12 +163,12 @@ const customPromiseExecFunction = (orig) => {
   };
 };
 
-Object.defineProperty(exports.exec, promisify.custom, {
+Object.defineProperty(exec, promisify.custom, {
   enumerable: false,
-  value: customPromiseExecFunction(exports.exec)
+  value: customPromiseExecFunction(exec)
 });
 
-exports.execFile = function execFile(file /* , args, options, callback */) {
+function execFile(file /* , args, options, callback */) {
   let args = [];
   let callback;
   let options;
@@ -386,11 +382,11 @@ exports.execFile = function execFile(file /* , args, options, callback */) {
   child.addListener('error', errorhandler);
 
   return child;
-};
+}
 
-Object.defineProperty(exports.execFile, promisify.custom, {
+Object.defineProperty(execFile, promisify.custom, {
   enumerable: false,
-  value: customPromiseExecFunction(exports.execFile)
+  value: customPromiseExecFunction(execFile)
 });
 
 function normalizeSpawnArguments(file, args, options) {
@@ -531,15 +527,15 @@ function normalizeSpawnArguments(file, args, options) {
 }
 
 
-var spawn = exports.spawn = function spawn(file, args, options) {
+function spawn(file, args, options) {
   const child = new ChildProcess();
 
   options = normalizeSpawnArguments(file, args, options);
   debug('spawn', options);
   child.spawn(options);
 
   return child;
-};
+}
 
 function spawnSync(file, args, options) {
   options = {
@@ -587,7 +583,6 @@ function spawnSync(file, args, options) {
 
   return child_process.spawnSync(options);
 }
-exports.spawnSync = spawnSync;
 
 
 function checkExecSyncError(ret, args, cmd) {
@@ -625,7 +620,6 @@ function execFileSync(command, args, options) {
 
   return ret.stdout;
 }
-exports.execFileSync = execFileSync;
 
 
 function execSync(command, options) {
@@ -644,7 +638,6 @@ function execSync(command, options) {
 
   return ret.stdout;
 }
-exports.execSync = execSync;
 
 
 function validateTimeout(timeout) {
@@ -672,3 +665,15 @@ function sanitizeKillSignal(killSignal) {
                                    killSignal);
   }
 }
+
+module.exports = {
+  _forkChild,
+  ChildProcess,
+  exec,
+  execFile,
+  execFileSync,
+  execSync,
+  fork,
+  spawn,
+  spawnSync
+};