fix(@angular/cli): fix generate app root in windows

Fix #7960

Author: filipesilva

packages/@angular/cli/commands/generate.ts

@@ -138,15 +138,15 @@ export default Command.extend({
       dryRun: commandOptions.dryRun
     };
     const parsedPath = dynamicPathParser(dynamicPathOptions);
-    commandOptions.sourceDir = appConfig.root;
-    const root = appConfig.root + path.sep;
-    commandOptions.appRoot = parsedPath.appRoot === appConfig.root ? '' :
+    commandOptions.sourceDir = parsedPath.sourceDir;
+    const root = parsedPath.sourceDir + path.sep;
+    commandOptions.appRoot = parsedPath.appRoot === parsedPath.sourceDir ? '' :
       parsedPath.appRoot.startsWith(root)
         ? parsedPath.appRoot.substr(root.length)
         : parsedPath.appRoot;
 
     commandOptions.path = parsedPath.dir.replace(separatorRegEx, '/');
-    commandOptions.path = parsedPath.dir === appConfig.root ? '' :
+    commandOptions.path = parsedPath.dir === parsedPath.sourceDir ? '' :
       parsedPath.dir.startsWith(root)
         ? commandOptions.path.substr(root.length)
         : commandOptions.path;

packages/@angular/cli/utilities/dynamic-path-parser.ts

@@ -12,9 +12,11 @@ export interface DynamicPathOptions {
 
 export function dynamicPathParser(options: DynamicPathOptions) {
   const projectRoot = options.project.root;
-  const sourceDir = options.appConfig.root;
+  const sourceDir = options.appConfig.root.replace('/', path.sep);
 
-  const p = options.appConfig.appRoot === undefined ? 'app' : options.appConfig.appRoot;
+  const p = options.appConfig.appRoot === undefined
+    ? 'app'
+    : options.appConfig.appRoot.replace('/', path.sep);
   const appRoot = path.join(sourceDir, p);
   const cwd = process.env.PWD;