Awesome

Barion - Fast and Simple Prompt

Barion is a compiled fast prompt to use across any shell.

Features

The special features of Barion is support for showing nix-shell, showing a compact git status overview and optional fish_prompt-like view of the exit status of last command.

Building

Building Barion requires just Crystal as there is no dependencies. Running crystal build --release prompt.cr -o barion should be everything necessary. There is also an environment set up for building via nix, so nix-build will take care of everything.

Setup

All these setup commands are

bash

If you want to keep your prompt inside nix shells, you can use the below code:

function barion_prompt {
	barion $1
	PS1="\[\e[1m\]\$\[\e[m\] "
}
PROMPT_COMMAND="barion_prompt \$?"

If the fish-style status-code display is not needed, simply drop the parameter:

function barion_prompt {
	barion
	PS1="\[\e[1m\]\$\[\e[m\] "
}
PROMPT_COMMAND="barion_prompt"

(The \[ and \] marks non-printing characters to avoid glitches in prompt rendering see GNU Bash manual)

fish

For fish we can just use the fish_prompt hook.

function fish_prompt
	barion $status
	echo "\e[1m\$\e[m "
end

Again, if the status is not needed or wanted, just remove the parameter:

function fish_prompt
	barion
	echo "\e[1m\$\e[m "
end

zsh

With zsh we use the precmd hook to achieve the same effect as the other shells.

function precmd {
	barion $?
}
PROMPT="%B\$%b "

If you don't want the fish-style exit codes shown in the prompt, just remove the parameter passed to barion.

function precmd {
	barion
}
PROMPT="%B\$%b "

Other shells

Use some sort of available hook to call Barion and write the lower prompt line in the native way of the shell.