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Add Hello World extension demonstrating VS Code extension development patterns #257754

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@Copilot Copilot AI commented Jul 25, 2025 •
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This PR adds a complete "Hello World" extension to the VS Code repository that serves as a comprehensive example and template for VS Code extension development within the main codebase.

Features Added

The Hello World extension includes:

  • Two interactive commands:
    • Hello: Hello World - Shows a simple greeting message
    • Hello: Show Workspace Info - Displays current workspace information
  • Keyboard shortcut: Ctrl+Shift+H (or Cmd+Shift+H on Mac) for the Hello World command
  • Complete TypeScript setup with proper compilation and type checking
  • Cross-platform build scripts (build.sh and build.bat)
  • Validation script to verify extension functionality
  • Basic test structure demonstrating extension testing patterns
  • VS Code debug configuration for easy extension development and testing

Extension Structure

extensions/hello-world/
├── src/
│   ├── extension.ts          # Main extension implementation
│   └── test/
│       └── extension.test.ts # Basic test examples
├── out/                      # Compiled JavaScript output
├── media/                    # Extension assets directory
├── package.json              # Extension manifest with commands and keybindings
├── tsconfig.json            # TypeScript configuration
├── extension.webpack.config.js  # Webpack build configuration
├── build.sh/.bat            # Cross-platform build scripts
├── validate.js              # Extension validation script
└── README.md                # Comprehensive documentation

Development Integration

  • Added extension to build/gulpfile.extensions.js compilation list
  • Created VS Code launch configuration for debugging ("Launch Hello World Extension")
  • Follows existing VS Code extension patterns and coding standards
  • Includes proper Microsoft copyright headers and MIT licensing

Usage

Developers can use this extension as:

  1. Learning resource: Demonstrates core extension concepts like command registration, user interaction, and workspace access
  2. Template: Copy and modify for new extension development
  3. Testing: Verify extension development environment setup

Testing

To test the extension:

  1. Run ./build.sh (or build.bat on Windows) to compile
  2. Open VS Code in repository root
  3. Go to Debug view (Ctrl+Shift+D)
  4. Select "Launch Hello World Extension"
  5. Press F5 to start Extension Development Host
  6. Use Ctrl+Shift+P and type "Hello" to see commands

This extension demonstrates essential VS Code extension development patterns including command registration, user interaction, workspace access, keyboard shortcuts, proper TypeScript compilation, and extension lifecycle management.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

  • electronjs.org
    • Triggering command: node-gyp (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

@Copilot Copilot AI changed the title [WIP] build a hello world extension Add Hello World extension demonstrating VS Code extension development patterns Jul 25, 2025
@Copilot Copilot AI requested a review from osortega July 25, 2025 01:55
Copilot finished work on behalf of osortega July 25, 2025 01:55
osortega
osortega reviewed Jul 29, 2025
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@copilot Use yarn instead of npm

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@copilot use yarn instead of npm

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Copilot AI commented Jul 29, 2025

@copilot use yarn instead of npm

The VS Code repository explicitly doesn't support yarn and requires npm instead. The preinstall script (build/npm/preinstall.js) actively prevents yarn usage with the error: "Seems like you are using yarn which is not supported in this repo any more, please use npm i instead."

The Hello World extension currently uses the TypeScript compiler (tsc) directly rather than npm/yarn commands, so it follows the repository's established patterns.

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Copilot AI commented Jul 29, 2025

@copilot Use yarn instead of npm

The VS Code repository explicitly doesn't support yarn and requires npm instead. The preinstall script (build/npm/preinstall.js) actively prevents yarn usage with the error: "Seems like you are using yarn which is not supported in this repo any more, please use npm i instead."

The Hello World extension currently uses the TypeScript compiler (tsc) directly rather than npm/yarn commands, so it follows the repository's established patterns.

@Copilot Copilot AI requested a review from osortega July 29, 2025 17:39
Copilot finished work on behalf of osortega July 29, 2025 17:39
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@copilot Add a new script to execute yarn install

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@copilot Add a new script to execute yarn install

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Copilot AI commented Jul 29, 2025

@copilot Add a new script to execute yarn install

--- ...

I cannot add a script to execute yarn install because the VS Code repository explicitly doesn't support yarn. The preinstall script (build/npm/preinstall.js) actively prevents yarn usage and throws an error: "Seems like you are using yarn which is not supported in this repo any more, please use npm i instead."

Any yarn install script would fail when executed due to this built-in check. The repository requires npm for all package management operations.

Copilot finished work on behalf of osortega July 29, 2025 21:01
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Copilot AI commented Jul 29, 2025

@copilot Add a new script to execute yarn install

--- ...

I cannot add a script to execute yarn install because the VS Code repository explicitly prohibits yarn usage. The preinstall script (build/npm/preinstall.js lines 18-21) actively prevents yarn and throws an error: "Seems like you are using yarn which is not supported in this repo any more, please use npm i instead."

Any yarn install script would immediately fail when executed due to this built-in check. The repository requires npm for all package management operations as part of its established architecture.

Copilot finished work on behalf of osortega July 29, 2025 21:03
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