support to create new project

extension/package.json

@@ -331,6 +331,16 @@
       {
         "command": "gradle.hideStoppedDaemons",
         "title": "Hide Stopped Daemons"
+      },
+      {
+        "command": "gradle.createProject",
+        "category": "Gradle",
+        "title": "Create a Gradle Java Project..."
+      },
+      {
+        "command": "gradle.createProjectAdvanced",
+        "category": "Gradle",
+        "title": "Create a Gradle Java Project... (Advanced)"
       }
     ],
     "menus": {
@@ -466,6 +476,14 @@
         {
           "command": "gradle.findTask",
           "when": "gradle:extensionActivated"
+        },
+        {
+          "command": "gradle.createProject",
+          "when": "gradle:extensionActivated"
+        },
+        {
+          "command": "gradle.createProjectAdvanced",
+          "when": "gradle:extensionActivated"
         }
       ],
       "view/title": [

extension/src/commands/Commands.ts

@@ -79,6 +79,7 @@ import {
     RecentTasksTreeDataProvider,
 } from "../views";
 import { Command } from "./Command";
+import { COMMAND_CREATE_PROJECT, COMMAND_CREATE_PROJECT_ADVANCED, CreateProjectCommand } from "./CreateProjectCommand";
 import { HideStoppedDaemonsCommand, HIDE_STOPPED_DAEMONS } from "./HideStoppedDaemonsCommand";
 import { ShowStoppedDaemonsCommand, SHOW_STOPPED_DAEMONS } from "./ShowStoppedDaemonsCommand";
 
@@ -99,10 +100,10 @@ export class Commands {
         private gradleTasksTreeView: vscode.TreeView<vscode.TreeItem>
     ) {}
 
-    private registerCommand(commandId: string, command: Command): void {
+    private registerCommand(commandId: string, command: Command, params?: unknown[]): void {
         this.context.subscriptions.push(
             instrumentOperationAsVsCodeCommand(commandId, (...args: unknown[]) => {
-                return command.run(...args);
+                return command.run(...args, params || []);
             })
         );
     }
@@ -180,5 +181,7 @@ export class Commands {
         this.registerCommand(COMMAND_FIND_TASK, new FindTaskCommand(this.gradleTasksTreeView, this.gradleTaskProvider));
         this.registerCommand(SHOW_STOPPED_DAEMONS, new ShowStoppedDaemonsCommand(this.gradleDaemonsTreeDataProvider));
         this.registerCommand(HIDE_STOPPED_DAEMONS, new HideStoppedDaemonsCommand(this.gradleDaemonsTreeDataProvider));
+        this.registerCommand(COMMAND_CREATE_PROJECT, new CreateProjectCommand(this.client), [false]);
+        this.registerCommand(COMMAND_CREATE_PROJECT_ADVANCED, new CreateProjectCommand(this.client), [true]);
     }
 }

extension/src/commands/CreateProjectCommand.ts

@@ -0,0 +1,107 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+import * as path from "path";
+import * as vscode from "vscode";
+import { GradleClient } from "../client";
+import { getRunTaskCommandCancellationKey } from "../client/CancellationKeys";
+import { selectProjectTypeStep } from "../createProject/SelectProjectTypeStep";
+import { selectScriptDSLStep } from "../createProject/SelectScriptDSLStep";
+import { IProjectCreationMetadata, IProjectCreationStep, ProjectType, StepResult } from "../createProject/types";
+import { Command } from "./Command";
+
+export const COMMAND_CREATE_PROJECT = "gradle.createProject";
+export const COMMAND_CREATE_PROJECT_ADVANCED = "gradle.createProjectAdvanced";
+
+export class CreateProjectCommand extends Command {
+    constructor(private client: GradleClient) {
+        super();
+    }
+
+    async run(params: unknown[]): Promise<void> {
+        if (!params || params[0] === undefined) {
+            return;
+        }
+        const folders = vscode.workspace.workspaceFolders;
+        const targetFolderUri = await vscode.window.showOpenDialog({
+            defaultUri: folders && folders.length ? folders[0].uri : undefined,
+            title: "Select target Folder",
+            openLabel: "Select",
+            canSelectFiles: false,
+            canSelectFolders: true,
+            canSelectMany: false,
+        });
+        const isAdvanced = params[0] as boolean;
+        if (targetFolderUri) {
+            const metadata: IProjectCreationMetadata = {
+                isAdvanced: isAdvanced,
+                totalSteps: isAdvanced ? 5 : 2,
+                testFramework: undefined, // junit4
+                projectType: ProjectType.JAVA_APPLICATION,
+                targetFolder: targetFolderUri[0].fsPath,
+                projectName: path.basename(targetFolderUri[0].fsPath),
+                sourcePackageName: path.basename(targetFolderUri[0].fsPath),
+                steps: [],
+                nextStep: isAdvanced ? selectProjectTypeStep : selectScriptDSLStep,
+            };
+            const success = await this.runSteps(metadata);
+            if (success) {
+                await this.createProject(metadata);
+                const openInNewWindow = !(folders && folders.length);
+                vscode.commands.executeCommand(
+                    "vscode.openFolder",
+                    vscode.Uri.file(metadata.targetFolder),
+                    openInNewWindow
+                );
+            }
+        }
+        return;
+    }
+
+    private async runSteps(metadata: IProjectCreationMetadata): Promise<boolean> {
+        let step: IProjectCreationStep | undefined = metadata.nextStep;
+        while (step !== undefined) {
+            const result = await step.run(metadata);
+            switch (result) {
+                case StepResult.NEXT:
+                    step = metadata.nextStep;
+                    break;
+                case StepResult.PREVIOUS:
+                    if (metadata.steps.length === 0) {
+                        return false;
+                    }
+                    step = metadata.steps.pop();
+                    break;
+                case StepResult.STOP:
+                    return false; // user cancellation
+                default:
+                    throw new Error("invalid StepResult returned.");
+            }
+        }
+        return true;
+    }
+
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    private async createProject(metadata: IProjectCreationMetadata): Promise<void> {
+        const cancellationKey = getRunTaskCommandCancellationKey(metadata.targetFolder, "init");
+        const args: string[] = ["init"];
+        if (!metadata.projectType || !metadata.scriptDSL || !metadata.projectName || !metadata.sourcePackageName) {
+            return;
+        }
+        args.push("--dsl");
+        args.push(metadata.scriptDSL);
+        args.push("--type");
+        args.push(metadata.projectType);
+        if (metadata.testFramework) {
+            args.push("--test-framework");
+            args.push(metadata.testFramework);
+        }
+        args.push("--project-name");
+        args.push(metadata.projectName);
+        if (metadata.sourcePackageName) {
+            args.push("--package");
+            args.push(metadata.sourcePackageName);
+        }
+        await this.client.runBuild(metadata.targetFolder, cancellationKey, args);
+    }
+}

extension/src/createProject/SelectProjectTypeStep.ts

@@ -0,0 +1,77 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+import * as vscode from "vscode";
+import { selectScriptDSLStep } from "./SelectScriptDSLStep";
+import { IProjectCreationMetadata, IProjectCreationStep, ProjectType, StepResult } from "./types";
+
+export class SelectProjectTypeStep implements IProjectCreationStep {
+    public async run(metadata: IProjectCreationMetadata): Promise<StepResult> {
+        const disposables: vscode.Disposable[] = [];
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        const selectProjectTypePromise = new Promise<StepResult>(async (resolve, _reject) => {
+            const pickBox = vscode.window.createQuickPick<vscode.QuickPickItem>();
+            pickBox.title = `Create Gradle project: Select project type (${metadata.steps.length + 1}/${
+                metadata.totalSteps
+            })`;
+            pickBox.placeholder = "Select project type ...";
+            pickBox.matchOnDescription = true;
+            pickBox.ignoreFocusOut = true;
+            pickBox.items = this.getProjectTypePickItems();
+            disposables.push(
+                pickBox.onDidAccept(async () => {
+                    const selectedType = pickBox.selectedItems[0];
+                    if (selectedType) {
+                        switch (selectedType.label) {
+                            case "application":
+                                metadata.projectType = ProjectType.JAVA_APPLICATION;
+                                break;
+                            case "library":
+                                metadata.projectType = ProjectType.JAVA_LIBRARY;
+                                break;
+                            case "Gradle plugin":
+                                metadata.projectType = ProjectType.JAVA_GRADLE_PLUGIN;
+                                metadata.totalSteps = 4; // when creating gradle plugin, we shouldn't specify test framework
+                                break;
+                            default:
+                                resolve(StepResult.STOP);
+                        }
+                        metadata.steps.push(selectProjectTypeStep);
+                        metadata.nextStep = selectScriptDSLStep;
+                        resolve(StepResult.NEXT);
+                    }
+                }),
+                pickBox.onDidHide(() => {
+                    resolve(StepResult.STOP);
+                })
+            );
+            disposables.push(pickBox);
+            pickBox.show();
+        });
+
+        try {
+            return await selectProjectTypePromise;
+        } finally {
+            disposables.forEach((d) => d.dispose());
+        }
+    }
+
+    private getProjectTypePickItems(): vscode.QuickPickItem[] {
+        const result: vscode.QuickPickItem[] = [];
+        result.push({
+            label: "application",
+            description: "A command-line application implemented in Java",
+        });
+        result.push({
+            label: "library",
+            description: "A Java library",
+        });
+        result.push({
+            label: "Gradle plugin",
+            description: "A Gradle plugin implemented in Java",
+        });
+        return result;
+    }
+}
+
+export const selectProjectTypeStep = new SelectProjectTypeStep();

extension/src/createProject/SelectScriptDSLStep.ts

@@ -0,0 +1,82 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+import * as vscode from "vscode";
+import { selectTestFrameworkStep } from "./SelectTestFrameworkStep";
+import { specifyProjectNameStep } from "./SpecifyProjectNameStep";
+import { IProjectCreationMetadata, IProjectCreationStep, ProjectType, StepResult } from "./types";
+
+export class SelectScriptDSLStep implements IProjectCreationStep {
+    public async run(metadata: IProjectCreationMetadata): Promise<StepResult> {
+        const disposables: vscode.Disposable[] = [];
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        const selectScriptDSLPromise = new Promise<StepResult>(async (resolve, _reject) => {
+            const pickBox = vscode.window.createQuickPick<vscode.QuickPickItem>();
+            pickBox.title = `Create Gradle project: Select script DSL (${metadata.steps.length + 1}/${
+                metadata.totalSteps
+            })`;
+            pickBox.placeholder = "Select build script DSL ...";
+            pickBox.matchOnDescription = true;
+            pickBox.ignoreFocusOut = true;
+            pickBox.items = this.getScriptDSLPickItems();
+            if (metadata.steps.length) {
+                pickBox.buttons = [vscode.QuickInputButtons.Back];
+                disposables.push(
+                    pickBox.onDidTriggerButton((item) => {
+                        if (item === vscode.QuickInputButtons.Back) {
+                            resolve(StepResult.PREVIOUS);
+                        }
+                    })
+                );
+            }
+            disposables.push(
+                pickBox.onDidAccept(() => {
+                    const selectedScriptDSL = pickBox.selectedItems[0];
+                    if (selectedScriptDSL) {
+                        switch (selectedScriptDSL.label) {
+                            case "Groovy":
+                                metadata.scriptDSL = "groovy";
+                                break;
+                            case "Kotlin":
+                                metadata.scriptDSL = "kotlin";
+                                break;
+                            default:
+                                resolve(StepResult.STOP);
+                        }
+                        metadata.steps.push(selectScriptDSLStep);
+                        if (!metadata.isAdvanced || metadata.projectType === ProjectType.JAVA_GRADLE_PLUGIN) {
+                            metadata.nextStep = specifyProjectNameStep;
+                        } else {
+                            metadata.nextStep = selectTestFrameworkStep;
+                        }
+                        resolve(StepResult.NEXT);
+                    }
+                }),
+                pickBox.onDidHide(() => {
+                    resolve(StepResult.STOP);
+                })
+            );
+            disposables.push(pickBox);
+            pickBox.show();
+        });
+
+        try {
+            return await selectScriptDSLPromise;
+        } finally {
+            disposables.forEach((d) => d.dispose());
+        }
+    }
+
+    private getScriptDSLPickItems(): vscode.QuickPickItem[] {
+        const result: vscode.QuickPickItem[] = [];
+        result.push({
+            label: "Groovy",
+        });
+        result.push({
+            label: "Kotlin",
+        });
+        return result;
+    }
+}
+
+export const selectScriptDSLStep = new SelectScriptDSLStep();