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linux/.config/bash/module/Nix.sh

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Bash

# Find Nix package path.
# Usage: nix_find <PACKAGE>
function nix_find() {
local IFS=$'\n'
local package="${1}"
if [[ "${package}" = "" ]]; then
help find_nix
return 2
fi
local found=$(ls --classify /nix/store/ | grep "${package}".*/)
if [[ "${found}" != "" ]]; then
echo "/nix/store/${found%/}"
else
false
fi
}
# Switch to Unstable branch.
function nix_unstable() {
nix-channel --remove nixos
nix-channel --remove home-manager
nix-channel --add https://nixos.org/channels/nixos-unstable nixos
nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
nix-channel --update
}
# Display current channel.
function nix_channel() {
nix-channel --list
}
# Update system (rebuild).
# Optionally force the hostname.
# Usage: nix_update [HOSTNAME]
function nix_update() {
local target="${1}"
[[ "${target}" = "" ]] && target="${HOSTNAME}"
cd ${HOME}/.config/linux/system
nixos-rebuild switch --flake .#${target}
}
# Upgrade system. Applies after reboot.
# Optionally force the hostname.
# Usage: nix_upgrade [HOSTNAME]
function nix_upgrade() {
local target="${1}"
[[ "${target}" = "" ]] && target="${HOSTNAME}"
cd ${HOME}/.config/linux/system
nix flake update && nix_update "${target}"
}
# Free up root space.
function nix_clean() {
nix-collect-garbage -d
_is_root && nix-store --gc
}
# Spawn shell with specified nix environment. `Main` is default.
# Usage: nix_shell [NAME]
function nix_shell() {
local name="${1,,}"
[[ "${name}" = "" ]] && name="main"
nix_shell="${name}" nix-shell ~/.config/linux/shell/"${name^}".nix
}
alias shell="nix_shell"
# Spawn nix-shell with specified packages.
# Usage: nix_tmpshell <PACKAGES>
function nix_tmpshell() {
local pkgs="${@}"
if [[ "${pkgs}" = "" ]]; then
help nix_tmpshell
return 2
fi
nix_shell="${1}" nix-shell -p ${pkgs}
}
alias tmpshell="nix_tmpshell"
# Autocomplete with available hosts.
function _comp_hosts() {
local IFS=$'\n'
local targets=($(ls --classify ~/.config/linux/system/ | grep /$ | sed -e "s/\/$//"))
_autocomplete_first ${targets[@]}
}
# Autocomplete with available shells.
function _comp_shells() {
local IFS=$'\n'
local targets=($(ls ~/.config/linux/shell/ | sed -e "s/.nix$//" | tr '[:upper:]' '[:lower:]'))
_autocomplete_first ${targets[@]}
}
complete -F _comp_hosts nix_update nix_upgrade
complete -F _comp_shells nix_shell shell