align first add of launch configuration to preferences

fix wrong behavior of creating it always hard coded under .theia folder

Signed-off-by: Amiram Wingarten <amiram.wingarten@sap.com>

packages/debug/src/browser/debug-configuration-manager.ts

@@ -258,12 +258,23 @@ export class DebugConfigurationManager {
         });
     }
     protected async doCreate(model: DebugConfigurationModel): Promise<URI> {
-        const uri = new URI(model.workspaceFolderUri).resolve('.theia/launch.json');
+        await this.preferences.set('launch', {}); // create dummy launch.json in the correct place
+        const { configUri } = this.preferences.resolve('launch'); // get uri to write content to it
+        let uri: URI;
+        if (configUri && configUri.path.base === 'launch.json') {
+            uri = configUri;
+        } else { // fallback
+            uri = new URI(model.workspaceFolderUri).resolve('.theia/launch.json');
+        }
         const debugType = await this.selectDebugType();
         const configurations = debugType ? await this.provideDebugConfigurations(debugType, model.workspaceFolderUri) : [];
         const content = this.getInitialConfigurationContent(configurations);
+        const fileStat = await this.filesystem.getFileStat(uri.toString());
+        if (!fileStat) {
+            throw new Error(`file not found: ${uri.toString()}`);
+        }
         try {
-            await this.filesystem.createFile(uri.toString(), { content });
+            await this.filesystem.setContent(fileStat, content);
         } catch (e) {
             if (!FileSystemError.FileExists.is(e)) {
                 throw e;