Prompt user to add 'build' task to tasks.json

Author: DustinCampbell

src/omnisharpMain.ts

@@ -23,6 +23,7 @@ import {StdioOmnisharpServer} from './omnisharpServer';
 import forwardChanges from './features/changeForwarding';
 import reportStatus from './features/omnisharpStatus';
 import {installCoreClrDebug} from './coreclr-debug';
+import {promptToAddBuildTaskIfNecessary} from './tasks';
 import * as vscode from 'vscode';
 
 export function activate(context: vscode.ExtensionContext): any {
@@ -76,9 +77,12 @@ export function activate(context: vscode.ExtensionContext): any {
 		server.stop();
 	}));
 
+    // Check to see if there is a tasks.json with a "build" task and prompt the user to add it if missing.
+    promptToAddBuildTaskIfNecessary();
+    
     // install coreclr-debug
     installCoreClrDebug(context);
-
+    
 	context.subscriptions.push(...disposables);
 }
 

src/tasks.ts

@@ -0,0 +1,87 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as fs from 'fs-extra-promise';
+import * as path from 'path';
+import * as vscode from 'vscode';
+import * as tasks from 'vscode-tasks';
+
+function promptToAddBuildTask() {
+    return new Promise<boolean>((resolve, reject) => {
+        const item = { title: 'Yes' }
+        
+        vscode.window.showInformationMessage('Would you like to add a build task for your project?', item).then(selection => {
+            return selection
+                ? resolve(true)
+                : resolve(false);
+        });
+    });
+}
+
+function createBuildTaskDescription(): tasks.TaskDescription {
+    return {
+        taskName: "build",
+        args: [],
+        isBuildCommand: true,
+        problemMatcher: "$msCompile"
+    };
+}
+
+function createTasksConfiguration(): tasks.TaskConfiguration {
+    return {
+        version: "0.1.0",
+        command: "dotnet",
+        isShellCommand: true,
+        args: [],
+        tasks: [ createBuildTaskDescription() ]
+    };
+}
+
+function writeTasksJson(tasksJsonPath: string, tasksConfig: tasks.TaskConfiguration) {
+    const tasksJsonText = JSON.stringify(tasksConfig, null, '    ');
+    fs.writeFileSync(tasksJsonPath, tasksJsonText);
+}
+
+export function promptToAddBuildTaskIfNecessary() {
+    if (!vscode.workspace.rootPath) {
+        return;
+    }
+    
+    // If there is no project.json, we won't bother to prompt the user for tasks.json.
+    const projectJsonPath = path.join(vscode.workspace.rootPath, 'project.json');
+    if (!fs.existsSync(projectJsonPath)) {
+        return;
+    }
+
+    const vscodeFolder = path.join(vscode.workspace.rootPath, '.vscode');
+    const tasksJsonPath = path.join(vscodeFolder, 'tasks.json');
+    
+    fs.ensureDirAsync(vscodeFolder).then(() => {
+        fs.existsAsync(tasksJsonPath).then(exists => {
+            if (exists) {
+                fs.readFileAsync(tasksJsonPath).then(text => {
+                    const fileText = text.toString();
+                    let tasksConfig: tasks.TaskConfiguration = JSON.parse(fileText);
+                    let buildTask = tasksConfig.tasks.find(td => td.taskName === 'build');
+                    if (!buildTask) {
+                        promptToAddBuildTask().then(shouldAdd => {
+                            buildTask = createBuildTaskDescription();
+                            tasksConfig.tasks.push(buildTask);
+                            writeTasksJson(tasksJsonPath, tasksConfig);
+                        });
+                    }
+                });
+            }
+            else {
+                promptToAddBuildTask().then(shouldAdd => {
+                    const tasksConfig = createTasksConfiguration();
+                    writeTasksJson(tasksJsonPath, tasksConfig);
+                });
+            }
+        });
+    });
+}

src/typings/vscode-extension-telemetry.d.ts

@@ -1,3 +1,8 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
 declare module 'vscode-extension-telemetry' {
 	export default class TelemetryReporter {
 		constructor(extensionId: string,extensionVersion: string, key: string);