RAZ - Rust Action Zapper

⚡ Run ANY Rust file from ANYWHERE instantly. Smart test detection. Zero config. Just hit Cmd+R and watch it fly 🚀

VS Code Features

• Cmd+R to Run: Press Cmd+R (Mac) or Ctrl+R (Windows/Linux) in any Rust file to instantly run it
• Cmd+Shift+R to Override: Run with custom environment variables, options, and arguments
• Auto-Breakpoint Debug Mode: Set breakpoints and press Cmd+R - switches to debug mode automatically
• Binary Auto-Download: Downloads correct binary for your platform automatically
• Task Runner Integration: Better concurrency with VS Code's task system
• Override Persistence: Custom command configurations persist across sessions
• Extension Dependencies: Auto-installs rust-analyzer and CodeLLDB
• Smart Test Detection: Automatically detects and runs the test at your cursor position
• Framework Aware: Specialized commands for Leptos, Dioxus, Tauri, Bevy, Yew, and more
• Cross-IDE Override Persistence: Save overrides in VS Code, use them in terminal, Vim, IntelliJ, or anywhere
• Zero Configuration: Works immediately without any setup

Usage

Basic Usage (Cmd+R)

1. Open any Rust file in VS Code
2. Press Cmd+R (Mac) or Ctrl+R (Windows/Linux)
3. RAZ will:
   • Detect the file type and project context
   • Check for breakpoints in the current symbol's range
   • Automatically switch to debug mode if breakpoints are detected
   • Use rust-analyzer's debug codelens for debugging or fallback to RAZ execution

VS Code Debugging Integration

Auto-Breakpoint Debug Mode: Set breakpoints and press Cmd+R - switches to debug mode automatically

1. Set breakpoints in your Rust code by clicking in the gutter
2. Press Cmd+R as normal - RAZ automatically detects breakpoints
3. Debug mode activates when breakpoints are found in the current symbol
4. Run mode is used when no breakpoints are present

How It Works

• Symbol Detection: RAZ finds the symbol at your cursor position
• Breakpoint Scanning: Checks for breakpoints within that symbol's range
• Smart Switching:
  • ✅ Breakpoints found → Executes rust-analyzer's "Debug" codelens command
  • ⚡ No breakpoints → Uses fast RAZ execution
• Zero Configuration: Leverages existing rust-analyzer + CodeLLDB setup

Override Usage (Cmd+Shift+R)

Press Cmd+Shift+R to run with custom overrides and optionally save them for future use. Enter overrides in the input field:

Input Syntax

RUST_BACKTRACE=full --release --device true -- --exact --nocapture

The extension automatically parses:

• Environment variables: SCREAMING_CASE=value (e.g., RUST_BACKTRACE=full)
• Cargo options: Common cargo flags like --release, --features, etc. are automatically recognized
• Test arguments: Test-specific flags like --nocapture, --show-output are placed after --
• Manual separator: Use -- to explicitly separate cargo options from test arguments

Examples

Run with backtrace:

RUST_BACKTRACE=full

Run in release mode:

--release

Note: --release is automatically recognized as a cargo option

Run tests with output:

--nocapture --show-output

Note: Test arguments are automatically placed after --

Run specific test in release mode:

--release --exact --nocapture

Combined example:

RUST_BACKTRACE=full RUST_LOG=debug --release --platform web -- --test-threads 1

Command Selection

To see all available commands:

• Use Cmd+Shift+P → "RAZ: Select and Run Command"

Other Commands

Additional commands available through the Command Palette:

• "RAZ: Open RAZ Settings": Open VS Code settings for RAZ
• "RAZ: Setup RAZ Binary": Guided setup for RAZ binary installation
• "RAZ: Toggle Breakpoint Detection": Enable/disable automatic breakpoint detection
• "RAZ: Show Debug Info": Show debugging information for current cursor position

Override Persistence with Deferred Save

RAZ features a deferred save mechanism that only saves override configurations after successful command execution. This prevents failed or invalid overrides from persisting and causing future execution problems.

How Deferred Save Works

1. Cmd+Shift+R: Enter overrides and run the command
2. Command Execution: RAZ runs the command with your overrides applied
3. Success: If the command succeeds (exit code 0), the override is saved
4. Failure: If the command fails, the override is NOT saved and you see: "⚠ Warning Command failed. Override was NOT saved."
5. Future Runs: Cmd+R automatically applies saved overrides for that specific function

Benefits

• No Bad Overrides: Failed commands with invalid flags don't create persistent configurations
• Clean Configurations: Only working overrides are saved to your workspace
• Automatic Cleanup: No need to manually remove failed override attempts
• VS Code Integration: Failed tasks in VS Code don't create persistent overrides

Storage

Overrides are stored in .raz/overrides.toml with automatic backups and function-specific keys like src/lib.rs:function_name

Example Config Structure

[[overrides]]
version = 1

[overrides."src/lib.rs:test_foo"]
key = { primary = "src/lib.rs:test_foo", fallbacks = ["src/lib.rs:L25"] }
override_config = { key = "test", env = { RUST_BACKTRACE = "1" }, cargo_options = ["--quiet"], args = ["--exact", "--nocapture"] }
metadata = { created_at = "2024-01-15T10:30:00Z", file_path = "src/lib.rs", function_name = "test_foo" }

Managing Overrides

Use VS Code commands to manage your saved overrides:

• "RAZ: Override Statistics": View all saved override configurations
• "RAZ: List All Overrides": List all saved override configurations
• "RAZ: Clear Saved Overrides": Clear all saved overrides
• "RAZ: Debug Override Resolution": Debug override resolution for current file
• Command Palette: Access override management through Cmd+Shift+P

For CLI-based management, see the Override Management Guide.

Configuration

{
  // Show terminal output (default: true)
  "raz.showOutput": true,
  
  // Use VS Code tasks for better concurrency (default: true)
  "raz.useTaskRunner": true,
  
  // Enable automatic breakpoint detection for debugging (default: true)
  "raz.enableBreakpointDetection": true,
  
  // Custom path to RAZ binary (optional)
  // If not set, the extension will automatically download and manage the binary
  "raz.path": "/usr/local/bin/raz"
}

Binary Management

RAZ automatically downloads and manages the binary for your platform:

• Automatic Download: On first use, RAZ downloads the latest binary from GitHub releases
• Platform Detection: Automatically detects your OS and architecture (Linux, macOS, Windows)
• Custom Path: Set raz.path to use your own RAZ installation
• Lightweight Extension: No bundled binaries - smaller download size

Debugging Integration

RAZ seamlessly integrates with rust-analyzer and CodeLLDB for debugging:

• Direct Codelens Execution: Simply executes rust-analyzer's "Debug" codelens command when breakpoints are found
• Automatic Detection: Detects breakpoints within symbol ranges automatically
• Zero Configuration: Leverages your existing rust-analyzer + CodeLLDB setup
• Fallback Support: Falls back to fast RAZ execution when no breakpoints are detected
• Extension Dependencies: Automatically installs rust-analyzer and CodeLLDB extensions

Common Overrides

For Dioxus Projects

• --platform web - Build for web platform
• --platform desktop - Build for desktop platform
• --device true - Build for real device (mobile)
• --device false - Build for simulator (mobile)
• --release - Build in release mode
• --open - Open browser after starting server

For Tests

• -- --exact - Run exact test match
• -- --nocapture - Show println! output
• -- --test-threads 1 - Run tests sequentially
• -- --ignored - Run ignored tests

Environment Variables

• RUST_BACKTRACE=full - Full backtrace on panic
• RUST_BACKTRACE=1 - Short backtrace on panic
• RUST_LOG=debug - Enable debug logging
• RUST_FLAGS="-A warnings" - Suppress warnings

Examples

Running Tests

Place your cursor on a test function and press Cmd+R:

#[test]
fn test_auth() { // <- Cursor here + Cmd+R + Breakpoint = Debug mode!
    assert!(true);  // <- Set breakpoint here for automatic debugging
}
// Without breakpoints: cargo test -- tests::test_auth --exact
// With breakpoints: rust-analyzer debug mode with full debugging support

Running Binaries

Open any main.rs and press Cmd+R:

fn main() {
    println!("Hello, world!");
}
// Executes: cargo run

Running Single Files

Open a standalone Rust file and press Cmd+R:

// /tmp/hello.rs
fn main() {
    println!("Hello from single file!");
}
// Executes: rustc /tmp/hello.rs && /tmp/hello

Task Runner

The extension uses VS Code's task system for better command management:

Benefits

• Concurrent Execution: Run multiple commands simultaneously (e.g., dev server + tests)
• Non-blocking: Long-running commands (like cargo leptos watch) don't block the terminal
• Better Management: Stop, restart, and monitor tasks through VS Code's UI
• Dedicated Terminals: Each task runs in its own terminal panel

Usage

When you run a command with Cmd+R, it executes as a VS Code task. If you try to run the same command again, you'll get options:

• Show Task: Switch to the existing task's terminal
• Start New: Create a new instance
• Cancel: Cancel the operation

Long-Running Commands

These commands are automatically detected as background tasks:

• cargo leptos watch
• trunk serve (Yew)
• cargo tauri dev
• dx serve (Dioxus)
• cargo watch

To disable the task runner and use traditional terminal execution:

{
  "raz.useTaskRunner": false
}

Installation

See INSTALL.md for detailed installation instructions.

Building from Source

For Installation

1. Clone the repository
2. Install dependencies:

   cd raz-adapters/vscode
   npm install
   

3. Bundle the extension:

   npm run bundle
   

4. Install the extension:

   code --install-extension raz-vscode-x.x.x.vsix
   

For Development/Contributing

1. Clone the repository
2. Install dependencies:

   cd raz-adapters/vscode
   npm install
   

3. Compile TypeScript:

   npm run compile
   

4. Press F5 in VS Code to launch the extension development host

Requirements

• VS Code 1.89.0 or higher
• Rust toolchain (cargo, rustc)
• Optional: Framework-specific tools (cargo-leptos, dx, trunk, etc.)

🐛 Issues and Support

Reporting Extension Issues

Use our specialized VS Code Extension Issue Template for:

• Keybinding problems (Cmd+R, Cmd+Shift+R not working)
• Extension loading issues
• Task runner problems
• Override dialog issues

Quick Debugging

1. Check the RAZ output channel:

   • View → Output → Select "RAZ" from dropdown

2. Test the binary directly:

   raz --version
   raz "/path/to/file.rs:line:column" --dry-run
   

3. Common solutions:

   • Restart VS Code
   • Check keybinding conflicts in Command Palette
   • Verify binary is installed: which raz

📋 All Issue Templates | 📖 Troubleshooting Guide

License

MIT