tree-editor: fixed ENOENT error (#184)

Fixed `ENOENT` error for the `TreeEditor` extension.

Signed-off-by: Jonas Helming <[email protected]>

Author: JonasHelming

README.md

@@ -21,7 +21,7 @@ A [yeoman](https://yeoman.io/) generator that scaffolds a project structure for
 
 ## How to use
 
-To use it, install `yo` and the `generator`.
+To use it, install `yo` (version 4.x.x) and the `generator` (see next below).
 
 ```
 npm install -g yo generator-theia-extension

src/app/index.ts

@@ -461,18 +461,38 @@ module.exports = class TheiaExtension extends Base {
         /** tree-editor */
         if (this.params.extensionType === ExtensionType.TreeEditor) {
             this.fs.copyTpl(
-                this.templatePath('tree-editor/'),
-                this.extensionPath(`src/browser/`),
+                this.templatePath('tree-editor/example-file'),
+                this.extensionPath(`src/browser/example-file`),
                 { params: this.params }
             );
-            this.fs.move(
-                this.extensionPath('src/browser/README.md'),
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/style'),
+                this.extensionPath(`src/browser/style`),
+                { params: this.params }
+            );
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/tree'),
+                this.extensionPath(`src/browser/tree`),
+                { params: this.params }
+            );
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/README.md'),
                 this.extensionPath(`README.md`),
             );
-            this.fs.move(
-                this.extensionPath('src/browser/tree-frontend-module.ts'),
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/tree-contribution.ts'),
+                this.extensionPath(`src/browser/tree-contribution.ts`),
+                { params: this.params }
+            );
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/tree-frontend-module.ts'),
                 this.extensionPath(`src/browser/${this.params.extensionPath}-frontend-module.ts`),
             );
+            this.fs.copyTpl(
+                this.templatePath('tree-editor/tree-label-provider-contribution.ts'),
+                this.extensionPath(`src/browser/tree-label-provider-contribution.ts`),
+                { params: this.params }
+            );
         }
 
         /** DiagramEditor */