feat(cli): use a 'ModulePrefix' constant to define components and directives prefix

This is not the final commit ! We still need to find an agreement on which solution
to use between exported constants and comments, then, if the first one is choosed,
move the associated code to utilities (see TODOs) and make the associated UTs.

see angular#3452

Author: nlm-pro

packages/angular-cli/blueprints/component/index.js

@@ -7,6 +7,7 @@ const getFiles = Blueprint.prototype.files;
 const stringUtils = require('ember-cli-string-utils');
 const astUtils = require('../../utilities/ast-utils');
 const NodeHost = require('@angular-cli/ast-tools').NodeHost;
+const ts = require('typescript');
 
 module.exports = {
   description: '',
@@ -37,14 +38,29 @@ module.exports = {
 
     this.dynamicPath = parsedPath;
 
+    var modulePrefix = '';
+
+    // TODO : make it generic and move it to utilities
+    try {
+      let pathToModule = findParentModule(this.project, this.dynamicPath.dir);
+      astUtils.getSourceNodes(astUtils.getSource(pathToModule))
+        .last(node => (node.flags & ts.NodeFlags.Export) !== 0 && node.getText().indexOf('ModulePrefix') > -1)
+        .subscribe(node => {
+          modulePrefix = /= ?['"]([\w-]+)["']/.exec(node.getText())[1];
+        });
+    } catch(e) {
+      console.log(`there isn't any module for this component\n\t`);
+    }
+   
     var defaultPrefix = '';
     if (this.project.ngConfig &&
         this.project.ngConfig.apps[0] &&
         this.project.ngConfig.apps[0].prefix) {
       defaultPrefix = this.project.ngConfig.apps[0].prefix;
     }
 
-    var prefix = (this.options.prefix === 'false' || this.options.prefix === '') ? '' : (this.options.prefix || defaultPrefix);
+    var prefix = (this.options.prefix === 'false' || this.options.prefix === '')
+                      ? '' : (this.options.prefix || modulePrefix || defaultPrefix);
     prefix = prefix && `${prefix}-`;
 
     this.selector = stringUtils.dasherize(prefix + parsedPath.name);

packages/angular-cli/blueprints/directive/index.js

@@ -6,6 +6,8 @@ const findParentModule = require('../../utilities/find-parent-module').default;
 const NodeHost = require('@angular-cli/ast-tools').NodeHost;
 const Blueprint = require('../../ember-cli/lib/models/blueprint');
 const getFiles = Blueprint.prototype.files;
+const ts = require('typescript');
+
 
 module.exports = {
   description: '',
@@ -32,14 +34,29 @@ module.exports = {
 
     this.dynamicPath = parsedPath;
 
+    var modulePrefix = '';
+
+    // TODO : make it generic and move it to utilities
+    try {
+      let pathToModule = findParentModule(this.project, this.dynamicPath.dir);
+      astUtils.getSourceNodes(astUtils.getSource(pathToModule))
+        .last(node => (node.flags & ts.NodeFlags.Export) !== 0 && node.getText().indexOf('ModulePrefix') > -1)
+        .subscribe(node => {
+          modulePrefix = /= ?['"]([\w-]+)["']/.exec(node.getText())[1];
+        });
+    } catch(e) {
+      console.log(`there isn't any module for this directive\n\t`);
+    }
+
     var defaultPrefix = '';
     if (this.project.ngConfig &&
         this.project.ngConfig.apps[0] &&
         this.project.ngConfig.apps[0].prefix) {
       defaultPrefix = this.project.ngConfig.apps[0].prefix;
     }
 
-    var prefix = (this.options.prefix === 'false' || this.options.prefix === '') ? '' : (this.options.prefix || defaultPrefix);
+    var prefix = (this.options.prefix === 'false' || this.options.prefix === '')
+                      ? '' : (this.options.prefix || modulePrefix || defaultPrefix);
     prefix = prefix && `${prefix}-`;