nixfetch

A fast, minimal system information fetch tool for Linux, written in Odin. Displays system info alongside a colored NixOS logo.

Preview

Custom Image Support

On terminals that support the Kitty graphics protocol (e.g. Ghostty, Kitty), you can display a custom PNG image instead of the ANSI logo by setting the NIXFETCH_IMAGE environment variable:

NIXFETCH_IMAGE=/path/to/image.png nixfetch

If the terminal does not support the Kitty graphics protocol, or the variable is unset, nixfetch falls back to the default colored ANSI logo.

Information Displayed

Field	Source
User	`$USER` + `uname` syscall
OS	`/etc/os-release` PRETTY_NAME
Host	`/sys/devices/virtual/dmi/id/`
Kernel	`uname` syscall
Shell	`$SHELL`
Desktop	`$XDG_CURRENT_DESKTOP` / `$XDG_SESSION_TYPE`
Memory	`/proc/meminfo`
Swap	`/proc/meminfo`
Terminal	`$TERM_PROGRAM`
Uptime	`sysinfo` syscall
Colors	ANSI color palette

Building

Prerequisites

Odin compiler
just command runner

If you're on NixOS or have Nix installed, a dev shell is provided:

nix develop

Build & Run

# default (debug) build
just build
just run

# optimized builds
just build-speed      # speed optimization
just build-size       # size optimization
just build-aggressive # aggressive optimization
just build-minimal    # minimal optimization

# build and run in one step
just run-speed

Binaries are output to target/<variant>/nixfetch.

Project Structure

src/
├── main.odin     # entry point, collects system info
├── lib.odin      # system info gathering functions
└── format.odin   # NixOS logo definitions
flake.nix         # Nix dev environment
justfile          # build recipes

License

MIT