Fix sourceRoot and destinationRoot and add fs API

yeoman-generator/yeoman-generator-tests.ts

@@ -35,6 +35,7 @@ var compose = generator.composeWith('namespace', 'any', {
 });
 
 compose.defaultFor('name');
+compose.destinationRoot() === 'string';
 compose.destinationRoot('rootPath') === 'string';
 compose.determineAppname();
 compose.getCollisionFilter()('output');
@@ -59,7 +60,8 @@ compose.run('args', () => {
 compose.runHooks(() => {
   return;
 });
-returnString = compose.sourceRoot('rootPath') === 'string';
+compose.sourceRoot('rootPath') === 'string';
+compose.sourceRoot() === 'string';
 
 var assert = yeoman.assert;
 
@@ -176,3 +178,25 @@ generator.prompt({ name: 'Name', message: '', validate: (input) => "Error" }, (a
 generator.prompt({ name: 'Name', message: '', filter: (input) => input }, (answer) => {}); 
 generator.prompt({ name: 'Name', message: '', when: (answers) => true }, (answer) => {}); 
 generator.prompt({ name: 'Name', message: '', when: true }, (answer) => {}); 
+
+// http://yeoman.io/generator/Base.html
+// https://github.com/SBoudrias/mem-fs-editor
+generator.fs.read("file") === "string";
+generator.fs.read("file", {}) === "string";
+generator.fs.readJSON("file") === {};
+generator.fs.readJSON("file", {}) === {};
+generator.fs.write("file", "contents");
+generator.fs.writeJSON("file", {});
+generator.fs.writeJSON("file", {}, () => {});
+generator.fs.writeJSON("file", {}, () => {}, 2);
+generator.fs.delete("file");
+generator.fs.delete("file", {});
+generator.fs.copy("from", "to");
+generator.fs.copy("from", "to", {});
+generator.fs.copyTpl("from", "to", {});
+generator.fs.copyTpl("from", "to", {}, {});
+generator.fs.move("from", "to");
+generator.fs.move("from", "to", {});
+generator.fs.exists("file") === true;
+generator.fs.commit(() => {});
+generator.fs.commit([], () => {});

yeoman-generator/yeoman-generator.d.ts

@@ -9,7 +9,7 @@ declare module yo {
         argument(name: string, config: IArgumentConfig): void;
         composeWith(namespace: string, options: any, settings?: IComposeSetting): IYeomanGenerator;
         defaultFor(name: string): void;
-        destinationRoot(rootPath: string): string;
+        destinationRoot(rootPath?: string): string;
         destinationPath(...path: string[]): string;
         determineAppname(): void;
         getCollisionFilter(): (output: any) => void;
@@ -19,7 +19,7 @@ declare module yo {
         run(args?: any): void;
         run(args: any, callback?: Function): void;
         runHooks(callback?: Function): void;
-        sourceRoot(rootPath: string): string;
+        sourceRoot(rootPath?: string): string;
         templatePath(...path: string[]): string;
         prompt(opt: IPromptOptions | IPromptOptions[], callback: (answers: any) => void): void;
         npmInstall(packages?: string[] | string, options?: any, cb?: Function): void;
@@ -27,13 +27,14 @@ declare module yo {
         spawnCommand(name: string, args?: string[], options?: Object): void;
         spawnCommandSync(name: string, args?: string[], options?: Object): void;
         options: { [key: string]: any };
+        fs: IMemFsEditor;
     }
 
     export class YeomanGeneratorBase implements IYeomanGenerator, NodeJS.EventEmitter {
         argument(name: string, config: IArgumentConfig): void;
         composeWith(namespace: string, options: any, settings?: IComposeSetting): IYeomanGenerator;
         defaultFor(name: string): void;
-        destinationRoot(rootPath: string): string;
+        destinationRoot(rootPath?: string): string;
         destinationPath(...path: string[]): string;
         determineAppname(): void;
         getCollisionFilter(): (output: any) => void;
@@ -43,7 +44,7 @@ declare module yo {
         run(args?: any): void;
         run(args: any, callback?: Function): void;
         runHooks(callback?: Function): void;
-        sourceRoot(rootPath: string): string;
+        sourceRoot(rootPath?: string): string;
         templatePath(...path: string[]): string;
         addListener(event: string, listener: Function): NodeJS.EventEmitter;
         on(event: string, listener: Function): NodeJS.EventEmitter;
@@ -65,6 +66,21 @@ declare module yo {
         appname: string;
         gruntfile: IGruntFileStatic;
         options: { [key: string]: any };
+        fs: IMemFsEditor;
+    }
+
+    export interface IMemFsEditor {
+        read(filepath: string, options?: Object): string;
+        readJSON(filepath: string, defaults?: Object): Object;
+        write(filepath: string, contents: string): void;
+        writeJSON(filepath: string, contents: Object, replacer?: Function, space?: number): void;
+        delete(filepath: string, options?: Object): void;
+        copy(from: string, to: string, options?: Object): void;
+        copyTpl(from: string, to: string, context: Object, options?: Object): void;
+        move(from: string, to: string, options?: Object): void;
+        exists(filepath: string): boolean;
+        commit(callback: Function): void;
+        commit(filters: any[], callback: Function): void;
     }
 
     export interface IInstallDependencyOptions {