Merge pull request #10 from yeoman/mem-fs

Expose mem-fs on the environment

lib/environment.js

@@ -6,6 +6,7 @@ var chalk = require('chalk');
 var _ = require('lodash');
 var GroupedQueue = require('grouped-queue');
 var untildify = require('untildify');
+var memFs = require('mem-fs');
 
 var debug = require('debug')('generators:environment');
 
@@ -47,6 +48,7 @@ var Environment = module.exports = function Environment(args, opts, adapter) {
   this.store = new Store();
 
   this.runLoop = new GroupedQueue(Environment.queues);
+  this.sharedFs = memFs.create();
 
   this.lookups = ['.', 'generators', 'lib/generators'];
   this.aliases = [];
@@ -405,6 +407,9 @@ Environment.enforceUpdate = function (env) {
     env.runLoop = new GroupedQueue(['initializing', 'prompting', 'configuring', 'default',
     'writing', 'conflicts', 'install', 'end']);
   }
+  if (!env.sharedFs) {
+    env.sharedFs = memFs.create();
+  }
   return env;
 };
 

package.json

@@ -37,6 +37,7 @@
     "inquirer": "^0.8.0",
     "lodash": "^2.4.1",
     "log-symbols": "^1.0.1",
+    "mem-fs": "SBoudrias/mem-fs",
     "text-table": "^0.2.0",
     "untildify": "^1.0.0",
     "yeoman-generator": "^0.17.7"

test/environment.js

@@ -50,6 +50,10 @@ describe('Environment', function () {
       var env = new Environment(null, null, dummyAdapter);
       assert.equal(env.adapter, dummyAdapter, 'Not the adapter provided');
     });
+
+    it('instantiates a mem-fs instance', function () {
+      assert.ok(this.env.sharedFs);
+    });
   });
 
   describe('#help()', function () {
@@ -442,6 +446,7 @@ describe('Environment', function () {
       this.env = new Environment();
       delete this.env.adapter;
       delete this.env.runLoop;
+      delete this.env.sharedFs;
     });
 
     it('add an adapter', function () {
@@ -453,6 +458,11 @@ describe('Environment', function () {
       Environment.enforceUpdate(this.env);
       assert(this.env.runLoop);
     });
+
+    it('add a shared mem-fs instance', function () {
+      Environment.enforceUpdate(this.env);
+      assert(this.env.sharedFs);
+    });
   });
 
   describe('.createEnv()', function () {