display loading message when new libs are being installed

Author: iurimatias

lib/contracts/compiler.js

@@ -69,7 +69,7 @@ class Compiler {
       },
       function loadCompiler(callback) {
         // TODO: there ino need to load this twice
-        solcW = new SolcW(self.solcVersion);
+        solcW = new SolcW({logger: self.logger, solcVersion: self.solcVersion});
         if (solcW.isCompilerLoaded()) {
           return callback();
         }

lib/contracts/solcW.js

@@ -1,14 +1,15 @@
 let utils = require('../utils/utils.js');
 let solcProcess;
 let compilerLoaded = false;
-var npm = require('../pipeline/npm.js');
+var Npm = require('../pipeline/npm.js');
 let path = require('path');
 let currentSolcVersion = require('../../package.json').dependencies.solc;
 
 class SolcW {
 
-  constructor(solcVersion) {
-    this.solcVersion = solcVersion;
+  constructor(options) {
+    this.solcVersion = options.solcVersion;
+    this.logger = options.logger;
   }
 
   load_compiler(done) {
@@ -27,6 +28,7 @@ class SolcW {
     if (this.solcVersion === currentSolcVersion) {
       solcProcess.send({action: 'loadCompiler', solcLocation: 'solc'});
     } else {
+      let npm = new Npm({logger: this.logger});
       npm.getPackageVersion('solc', this.solcVersion, false, function(location) {
         let requirePath = path.join(process.env.PWD, location);
         solcProcess.send({action: 'loadCompiler', solcLocation: requirePath});

lib/core/config.js

@@ -2,7 +2,7 @@ var fs = require('./fs.js');
 var File = require('./file.js');
 var Plugins = require('./plugins.js');
 var utils = require('../utils/utils.js');
-var npm = require('../pipeline/npm.js');
+var Npm = require('../pipeline/npm.js');
 
 // TODO: add wrapper for fs so it can also work in the browser
 // can work with both read and save
@@ -240,6 +240,7 @@ Config.prototype.loadFiles = function(files) {
         //if (false) {
           //readFiles.push(new File({filename: 'web3-' + web3Version + '.js', type: 'custom', resolver: function(callback) {
           readFiles.push(new File({filename: 'web3.js', type: 'custom', resolver: function(callback) {
+            let npm = new Npm({logger: self.logger});
             npm.getPackageVersion('web3', web3Version, 'dist/web3.js', function(web3Content) {
               callback(web3Content);
             });

lib/pipeline/npm.js

@@ -6,8 +6,14 @@ let http = require('follow-redirects').http;
 let https = require('follow-redirects').https;
 var tar = require('tar');
 
-module.exports = {
-  getPackageVersion: function(packageName, version, returnContent, callback) {
+class Npm {
+
+  constructor(options) {
+    this.logger = options.logger;
+  }
+
+  getPackageVersion(packageName, version, returnContent, callback) {
+    let self = this;
     let npmRegistry = "https://registry.npmjs.org/" + packageName + "/" + version;
 
     utils.httpsGet(npmRegistry, function (res) {
@@ -45,7 +51,7 @@ module.exports = {
           }
         } else {
           fs.mkdirpSync(packageDirectory);
-          //self.logger.info("downloading " + packageName + " " + version + "....");
+          self.logger.info("downloading " + packageName + " " + version + "....");
 
           download(tarball, packageDirectory + "/downloaded_package.tgz", function() {
             o_fs.createReadStream(packageDirectory + '/downloaded_package.tgz').pipe(
@@ -68,5 +74,6 @@ module.exports = {
       });
     });
   }
-};
+}
 
+module.exports = Npm;