Validate dependencies to avoid specific duplicated ones

Gruntfile.js

@@ -1,9 +1,23 @@
  var _ = require('underscore');
  var timer = require("grunt-timer");
  var jasmineCfg = require('./lib/build/tasks/jasmine.js');
+ var duplicatedDependencies = require('./lib/build/tasks/shrinkwrap-duplicated-dependencies.js');
 
  var REQUIRED_NPM_VERSION = /2.14.[0-9]+/;
  var REQUIRED_NODE_VERSION = /0.10.[0-9]+/;
+ var SHRINKWRAP_MODULES_TO_VALIDATE = [
+  'backbone',
+  'camshaft-reference',
+  'carto',
+  'cartodb.js',
+  'cartocolor',
+  'd3',
+  'jquery',
+  'leaflet',
+  'perfect-scrollbar',
+  'torque.js',
+  'turbo-carto'
+];
 
   /**
    *  CartoDB UI assets generation
@@ -43,6 +57,15 @@
       }
     });
 
+    var duplicatedModules = duplicatedDependencies(require('./npm-shrinkwrap.json'), SHRINKWRAP_MODULES_TO_VALIDATE);
+    if (duplicatedModules.length > 0) {
+      grunt.log.fail("############### /!\\ CAUTION /!\\ #################");
+      grunt.log.fail("Duplicated dependencies found in npm-shrinkwrap.json file.");
+      grunt.log.fail(JSON.stringify(duplicatedModules, null, 4));
+      grunt.log.fail("#################################################");
+      process.exit(1);
+    }
+
     var ROOT_ASSETS_DIR = './public/assets/';
     var ASSETS_DIR = './public/assets/<%= pkg.version %>';
 

lib/build/tasks/shrinkwrap-duplicated-dependencies.js

@@ -0,0 +1,49 @@
+function alldeps (mod, deps, name, parentVersion) {
+  name = name || mod.name;
+  return Object.keys(mod.dependencies).reduce(function (all, dependency) {
+    if (!all.hasOwnProperty(dependency)) {
+      all[dependency] = {};
+    }
+
+    var version = mod.dependencies[dependency].version;
+    var resolved = mod.dependencies[dependency].resolved;
+    if (!all[dependency].hasOwnProperty(version)) {
+      all[dependency][resolved] = {};
+    }
+
+    all[dependency][resolved][name] = parentVersion || version;
+    if (mod.dependencies[dependency].dependencies) {
+      alldeps(mod.dependencies[dependency], all, dependency, version);
+    }
+    return all;
+  }, deps || {});
+}
+
+/**
+ * Checks all modules dependencies versions within a npm-shrinkwrap to not be
+ * duplicated from different parent dependencies.
+ *
+ * For instance if there are a couple of dependencies using a different version
+ * of backbone it will return backbone with its parent dependencies.
+ */
+function duplicated (shrinkwrap, modulesToValidate) {
+  shrinkwrap = shrinkwrap || require('./npm-shrinkwrap.json');
+  var all = alldeps(shrinkwrap);
+
+  modulesToValidate = modulesToValidate || Object.keys(all);
+
+  return modulesToValidate.reduce(function (duplicatedMods, mod) {
+    var modVersions = Object.keys(all[mod]);
+    if (modVersions.length > 1) {
+      var invalidMod = { name: mod, versions: [] };
+
+      modVersions.forEach(function (modVersion) {
+        invalidMod.versions.push({version: modVersion, from: all[mod][modVersion]});
+      });
+      duplicatedMods.push(invalidMod);
+    }
+    return duplicatedMods;
+  }, []);
+}
+
+module.exports = duplicated;