rgrc - Rusty Generic Colouriser

A fast, Rust-based command-line tool that colorizes the output of other commands using regex-based rules. Drop-in replacement for grc with better performance.

Features

• Fast: 10x faster than original grc
• Rich Colorization: ANSI colors with count/replace support
• Compatible: Works with existing grc configuration files
• Shell Integration: Auto-generates aliases
• 80+ Commands: Pre-configured for common tools
• Smart Regex: Hybrid engine with optional fancy-regex support
• Lightweight: Minimal dependencies (2 core deps)

Quick Start

Installation

Shell (curl):

curl -sS https://raw.githubusercontent.com/lazywalker/rgrc/master/script/install.sh | sh

Cargo:

cargo install rgrc --features embed-configs

Homebrew:

brew tap lazywalker/rgrc
brew install rgrc

Arch Linux:

yay -S rgrc

Alpine Linux:

# Enable the testing repository (add edge testing)
doas cp /etc/apk/repositories /etc/apk/repositories.bak
echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" | doas tee -a /etc/apk/repositories
doas apk update
doas apk add rgrc

NixOS:

nix-shell -p rgrc

Debian/Ubuntu:

# Download the latest .deb from releases and install
sudo dpkg -i rgrc_<version>_amd64.deb

Usage

# Colorize any command
rgrc ping -c 4 google.com
rgrc docker ps
rgrc df -h

# Set up aliases (recommended)
echo 'eval "$(rgrc --aliases)"' >> ~/.bashrc
source ~/.bashrc

# Then use commands directly
ping -c 4 google.com  # automatically colorized
docker ps             # automatically colorized

Supported Commands

System: df, free, ps, top, vmstat, iostat, uptime, mount Network: ping, traceroute, netstat, ss, ip, curl, dig Development: gcc, make, docker, kubectl, git, mvn, go Files: ls, find, du, fdisk, lsof, stat

See full list in share/ directory

Options

Usage: rgrc [OPTIONS] COMMAND [ARGS...]

Options:
  --color, --colour    Override color output (on|off|auto)
  --aliases            Output shell aliases for available binaries
  --all-aliases        Output all shell aliases
  --except CMD,..      Exclude commands from alias generation
  --completions SHELL  Print shell completion script for SHELL (bash|zsh|fish|ash)
  --flush-cache        Flush and rebuild cache directory
  --config, -c NAME    Explicit config file name (e.g., df to load conf.df)
  --help, -h           Show this help message
  --version, -V        Show installed rgrc version and exit

Configuration

Custom Rules

Create ~/.config/rgrc/conf.mycommand:

regexp=^ERROR
colours=red,bold

regexp=^WARNING
colours=yellow

regexp=^INFO
colours=green

Add to ~/.rgrc:

mycommand
conf.mycommand

Shell Completions

# Bash
rgrc --completions bash > /etc/bash_completion.d/rgrc

# Zsh
rgrc --completions zsh > ~/.zfunc/_rgrc

# Fish
rgrc --completions fish > ~/.config/fish/completions/rgrc.fish

Development Guide

See DEVELOPMENT.md for instructions on adding new commands.

License

MIT - see LICENSE for details.

Credits

Inspired by grc by Radovan Garabík and grc-rs by Lars Christensen.