move requires inside functions that need them

lib/utils/utils.js

@@ -1,30 +1,23 @@
-let path = require('path');
-let globule = require('globule');
-let merge = require('merge');
 let http = require('follow-redirects').http;
 let https = require('follow-redirects').https;
-let shelljs = require('shelljs');
-var tar = require('tar');
-var propose = require('propose');
-var Web3 = require('web3');
-const constants = require('../constants');
-
-//let fs = require('../core/fs.js');
-let o_fs = require('fs-extra');
 
 function joinPath() {
+  const path = require('path');
   return path.join.apply(path.join, arguments);
 }
 
 function filesMatchingPattern(files) {
+  const globule = require('globule');
   return globule.find(files, {nonull: true});
 }
 
 function fileMatchesPattern(patterns, intendedPath) {
+  const globule = require('globule');
   return globule.isMatch(patterns, intendedPath);
 }
 
 function recursiveMerge(target, source) {
+  const merge = require('merge');
   return merge.recursive(target, source);
 }
 
@@ -81,6 +74,7 @@ function httpsGetJson(url, callback) {
 }
 
 function runCmd(cmd, options) {
+  const shelljs = require('shelljs');
   let result = shelljs.exec(cmd, options || {silent: true});
   if (result.code !== 0) {
     console.log("error doing.. " + cmd);
@@ -93,10 +87,12 @@ function runCmd(cmd, options) {
 }
 
 function cd(folder) {
+  const shelljs = require('shelljs');
   shelljs.cd(folder);
 }
 
 function sed(file, pattern, replace) {
+  const shelljs = require('shelljs');
   shelljs.sed('-i', pattern, replace, file);
 }
 
@@ -105,6 +101,7 @@ function exit(code) {
 }
 
 function downloadFile(url, dest, cb) {
+  const o_fs = require('fs-extra');
   var file = o_fs.createWriteStream(dest);
   (url.substring(0,5) === 'https' ? https : http).get(url, function(response) {
     response.pipe(file);
@@ -118,6 +115,8 @@ function downloadFile(url, dest, cb) {
 }
 
 function extractTar(filename, packageDirectory, cb) {
+  const o_fs = require('fs-extra');
+  const tar = require('tar');
   o_fs.createReadStream(filename).pipe(
     tar.x({
       strip: 1,
@@ -129,6 +128,7 @@ function extractTar(filename, packageDirectory, cb) {
 }
 
 function proposeAlternative(word, _dictionary, _exceptions) {
+  const propose = require('propose');
   let exceptions = _exceptions || [];
   let dictionary = _dictionary.filter((entry) => {
     return exceptions.indexOf(entry) < 0;
@@ -141,6 +141,7 @@ function pwd() {
 }
 
 function getExternalContractUrl(file) {
+  const constants = require('../constants');
   let url;
   const RAW_URL = 'https://raw.githubusercontent.com/';
   const MALFORMED_ERROR = 'Malformed Github URL for ';
@@ -186,10 +187,12 @@ function getExternalContractUrl(file) {
 }
 
 function toChecksumAddress(address) {
+  const Web3 = require('web3');
   return Web3.utils.toChecksumAddress(address);
 }
 
 function sha3(arg) {
+  const Web3 = require('web3');
   return Web3.utils.sha3(arg);
 }