Vscode Ext仅在项目有文件时显示扩展名

Question

我创建了一个处理一些 Rakefile 任务的 vscode 扩展。 现在我想限制扩展名仅在用户使用时才会显示在资源管理器中 打开Rakefile

为此，我在 package.json 中使用以下条目

 "contributes": {
    "views": {
      "explorer": [
        {
          "id": "rakeView",
          "name": "Rakee",
          "when": "resourceFilename ='Rakefile'"
        }
      ]
    },
    "commands": [
      {
        "command": "rakeView.executeTask",
        "title": "Execute",
        "icon": "images/icon.png"
      }
    ],

添加以下行时

"when": "resourceFilename ='Rakefile'"

从资源管理器视图中删除的扩展程序，当我删除它时，我能够看到扩展程序。 我希望它仅在项目有 Rakefile 时显示，我该怎么做？

https://github.com/microsoft/vscode-extension-samples/tree/1aae138e311fb87cc3ed2782be287f5d2f78e327/task-provider-sample

更新

尝试下面的答案后仍然不起作用，这是全部代码：

import * as vscode from "vscode";
import { rakeTaskProvider } from "./rakeCmd";
import { TaskTreeDataProvider } from "./rakeView";

let rakeTaskProvider: vscode.Disposable | undefined;

export function activate(_context: vscode.ExtensionContext): void {
  const workspaceRoot = vscode.workspace.rootPath;

  const onChangeActiveTextEditor = () => {
    let editor = vscode.window.activeTextEditor;
    vscode.commands.executeCommand('setContext', 'rakeView:fileIsRake', editor && editor.document.languageId === 'rakefile');
  };
  vscode.window.onDidChangeActiveTextEditor(onChangeActiveTextEditor, null, _context.subscriptions);
  onChangeActiveTextEditor();

  rakeTaskProvider = vscode.tasks.registerTaskProvider(
    rakeTaskProvider.rakeType,
    new rakeTaskProvider(workspaceRoot)
  );
  vscode.window.registerTreeDataProvider(
    "rakeView",
    new TaskTreeDataProvider(_context)
  );
  vscode.commands.registerCommand("rakeView.executeTask", function (task) {
    console.log(task);
    vscode.tasks.executeTask(task).then(
      function (value) {
        return value;
      },
      function (e) {
        console.error(
          "error",
          e
        );
      }
    );
  });
}

export function deactivate(): void {
  if (rakeTaskProvider) {
    rakeTaskProvider.dispose();
  }
}

package.json

"contributes": {
    "views": {
      "explorer": [
        {
          "id": "rakeView",
          "name": "Rakke",
          "when": "rakeView:fileIsRake"
        }
      ]
    },

Answer 1

你需要使用上下文，当编辑器改变时设置一个上下文变量来表示当前文件是一个 Rakefile

在您的 activate 函数中

  const onChangeActiveTextEditor = () => {
    let editor = vscode.window.activeTextEditor;
    vscode.commands.executeCommand('setContext', 'myExtenstion:fileIsRake', editor && editor.document.languageId === 'rake');
  };
  vscode.window.onDidChangeActiveTextEditor(onChangeActiveTextEditor, null, context.subscriptions);
  onChangeActiveTextEditor();

在package.json 中添加这个上下文变量

    "views": {
      "explorer": [
        {
          "id": "rakeView",
          "name": "Rakee",
          "when": "myExtenstion:fileIsRake"
        }
      ]
    },