The fastest unified package manager for Arch Linux + universal runtime version manager.
Alpha. OMG is alpha software. The CLI, flags, and on-disk formats can change without compatibility guarantees. Use it on machines you can recover, and file issues when something breaks.
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OMG replaces pacman, yay, nvm, pyenv, rustup, rbenv, and jenv with a single binary. It queries packages in about 11ms (13ms mean) via a background daemon that keeps repository indexes in memory.
# Before: 7 tools, 7 syntaxes, 7 configuration files
pacman -Ss firefox # Official repositories
yay -S spotify # AUR packages
nvm install 22 && nvm use 22# Node.js
pyenv install 3.12 # Python
rustup default stable # Rust
rbenv install 3.3.0 # Ruby
# After: Just OMG
omg search firefox
omg install spotify
omg use node 22
omg use python 3.12
omg use rust stable
omg use ruby 3.3.0curl -fsSL https://raw.githubusercontent.com/PyRo1121/omg/main/install.sh | bash# Prebuilt binary (fastest)
yay -S omg-bin
# Build from source
yay -S omgcargo install omg --git https://github.com/PyRo1121/omg --lockedAdd instant directory-based runtime switching to your shell configuration:
# Zsh (~/.zshrc)
eval "$(omg hook zsh)"
# Bash (~/.bashrc)
eval "$(omg hook bash)"
# Fish (~/.config/fish/config.fish)
omg hook fish | source# 1. Search packages across official repos and AUR in ~11ms
omg search ripgrep
# 2. Install official packages or AUR packages with auto-elevation
omg install visual-studio-code-bin
# 3. Switch language versions instantly
omg use node 22
omg use python 3.12
# 4. Run project scripts with auto-detected runtime versions
omg run dev
# 5. Lock your exact package and runtime environment for teammates
omg env capture
# 6. Launch the interactive terminal dashboard
omg dashDirect libalpm integration and an in-memory repository index eliminate subprocess startup overhead. omg search firefox --no-aur returns in 13ms mean / 11ms median compared to 247ms with pacman and 366ms with yay --repo.
Manage Node.js, Bun, Python, Go, Rust, Ruby, Java, and Pi from one CLI. OMG honors existing .nvmrc, .python-version, rust-toolchain.toml, and .tool-versions files automatically.
Build and install AUR packages safely unprivileged as your regular user. Multi-package builds run in parallel with build artifact cleanup.
omg run <task> inspects your directory, detects package.json, Cargo.toml, Makefile, pyproject.toml, or deno.json, and executes the task with the required runtime version pre-loaded.
omg env capture records installed packages and active runtimes into omg.lock. Teammates can run omg env check to detect drift and keep environments consistent.
omg dash launches an interactive terminal UI for monitoring package updates, disk space, active runtimes, and system health at a glance.
Measured 2026-09-03 on Arch Linux (kernel 7.2.2, Intel Core i9-14900K, 31 GiB RAM, local pacman sync databases) with hyperfine 1.20. Timed commands were preflighted (search/info had to print firefox; explicit count was 273). Flags: --shell=none --output=pipe, 3 warmup, 20–50 runs.
| Operation | OMG (daemon) | omg-fast | pacman | yay | vs pacman |
|---|---|---|---|---|---|
search firefox --no-aur |
13.1 ms (median 11.4) | 11.2 ms | 247 ms | 366 ms | 19× |
info firefox |
26.4 ms | 10.7 ms | 226 ms | 543 ms | 9× / 21× fast |
explicit --count |
10.4 ms | 10.4 ms | 32 ms | 54 ms | 3× |
status |
11.9 ms | 10.7 ms | — | — | — |
update discovery |
829 ms | — | — | — | — |
omg search / omg info / omg status go through the daemon. omg-fast is the thin IPC client (same index, less CLI work). Search speedup uses daemon mean vs pacman -Ss. Info’s 21× figure is omg-fast vs pacman -Si; the full omg info path is 9×.
Reproduce: ./benchmark-hyperfine.sh. This run: benchmarks/records/20260903_015949-5c43ddcc. History: benchmarks/latest.md.
OMG natively handles version switching and installation for major ecosystems:
| Runtime | Version Detection Files | Default Target |
|---|---|---|
| Node.js | .nvmrc, .node-version, package.json |
Official prebuilt binaries |
| Python | .python-version, pyproject.toml |
Standalone optimized builds |
| Rust | rust-toolchain.toml, rust-toolchain |
Official rustup toolchains |
| Go | .go-version, go.mod |
Official archive distributions |
| Bun | .bun-version, package.json |
Official release builds |
| Ruby | .ruby-version, Gemfile |
Ruby-build provider |
| Java | .java-version |
Adoptium Temurin OpenJDK |
| Command | Description |
|---|---|
omg search <query> |
Search packages in official repositories and AUR |
omg install <pkg...> |
Install system or community packages |
omg remove <pkg...> |
Remove packages (-r removes unneeded dependencies) |
omg update |
Upgrade all system and AUR packages |
omg use <runtime> [ver] |
Install and switch to a language version |
omg run <task> |
Execute project scripts with correct runtimes |
omg doctor |
Diagnose environment, PATH, and mirror configuration |
omg clean |
Remove orphaned packages and clean package caches |
omg dash |
Open the interactive terminal dashboard |
omg why <pkg> |
Trace dependency chains explaining why a package is installed |
omg size |
View package disk usage breakdown and dependency trees |
Run omg --help or see the CLI documentation for full argument details.
More docs: Installation · Runtimes · Security · Contributing
OMG is free and open-source software licensed under the MIT License.
Copyright (c) 2024-2026 Olen Latham.