emmylua_check is a powerful command-line tool designed to help developers identify and fix potential issues in Lua code during development. It leverages the core analysis engine of emmylua-analyzer to provide comprehensive code diagnostics, ensuring code quality and robustness.

✨ Features

• ⚡ High Performance: Built with Rust for blazing-fast analysis, capable of handling large codebases.
• 🎯 Comprehensive Diagnostics: Offers over 50 types of diagnostics, including:
  • Syntax errors
  • Type mismatches
  • Undefined variables and fields
  • Unused code
  • Code style issues
  • ...and more!
• ⚙️ Highly Configurable: Fine-grained control over each diagnostic via .emmyrc.json or .luarc.json files, including enabling/disabling and severity levels.
• 💻 Cross-Platform: Supports Windows, macOS, and Linux.
• CI/CD Friendly: Easily integrates into continuous integration workflows to ensure team code quality.

📦 Installation

Install emmylua_check via cargo:

cargo install emmylua_check

🚀 Usage

Basic Usage

Analyze all Lua files in the current directory:

emmylua_check .

Analyze a specific workspace directory:

emmylua_check ./src

Advanced Usage

Specify Configuration File

Use a specific .emmyrc.json configuration file:

emmylua_check . -c ./config/.emmyrc.json

Ignore Specific Files or Directories

Ignore files in the vender and test directories:

emmylua_check . -i "vender/**,test/**"

Output in JSON Format

Output diagnostics in JSON format to a file for further processing:

emmylua_check . -f json --output ./diag.json

⚙️ Configuration

emmylua_check shares the same configuration system as the EmmyLua Language Server. You can create a .emmyrc.json file in your project root to configure diagnostic rules.

Example .emmyrc.json:

{
  "diagnostics": {
    "disable": [
      "unused"
    ]
  }
}

For detailed information on all available diagnostics and configuration options, see the EmmyLua Configuration Documentation.

🛠️ CI/CD Integration

You can easily integrate emmylua_check into your GitHub Actions workflow to automate code checks.

Example .github/workflows/check.yml:

name: EmmyLua Check

on: [push, pull_request]

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
      - name: Install emmylua_check
        run: cargo install emmylua_check
      - name: Run check
        run: emmylua_check .

Command Line Options

Usage: emmylua_check [OPTIONS] [WORKSPACE]...

Arguments:
  [WORKSPACE]...  Path(s) to workspace directory

Options:
  -c, --config <CONFIG>                Path to configuration file. If not provided, ".emmyrc.json" and ".luarc.json" will be searched in the workspace directory
  -i, --ignore <IGNORE>                Comma-separated list of ignore patterns. Patterns must follow glob syntax
  -f, --output-format <OUTPUT_FORMAT>  Specify output format [default: text] [possible values: json, text]
      --output <OUTPUT>                Specify output target (stdout or file path, only used when output_format is json) [default: stdout]
      --warnings-as-errors             Treat warnings as errors
      --verbose                        Verbose output
  -h, --help                           Print help information
  -V, --version                        Print version information