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|
#!/usr/bin/env bash
# a small useful script for quickly accessing different nix and nixos commands
# through a single nice interface.
# run `nx help` for command list!
set -euo pipefail
config="/etc/configuration"
current_hostname="$(hostname)"
run() {
echo -ne "* \033[1;33m"
echo "$@"
echo -ne "\033[0m"
$@
}
error() {
echo -ne "\033[1;31m"
echo -n "error: "
echo -ne "\033[0m"
echo "$@"
}
rebuild() {
local target="$1"
local tool="$2"
run nixos-rebuild --sudo --builders "\"\"" --flake "$config#$target" "$tool"
}
flag() {
local f="$1"
case "$f" in
-h | --here)
config="."
;;
*)
error "unknown flag '$f'"
exit 1
;;
esac
}
apply_command() {
rebuild "$current_hostname" "switch"
}
apply_boot_command() {
rebuild "$current_hostname" "boot"
}
test_command() {
local given_host="${1:-}"
local target
if [ -z "$given_host" ]; then
target="$current_hostname"
else
target="$given_host"
fi
run nix build "$config#nixosConfigurations.$target.config.system.build.toplevel" --dry-run
}
repl_command() {
local given_host="${1:-}"
local target
if [ -z "$given_host" ]; then
target="$current_hostname"
else
target="$given_host"
fi
rebuild "$target" "repl"
}
garbage_command() {
local given_period="${1:-}"
if [ -z "$given_period" ]; then
run sudo nix-collect-garbage -d
else
run sudo nix-collect-garbage --delete-older-than "$given_period"
fi
}
help_command() {
echo "usage: nx <command> [args] [flags]"
echo ""
echo "commands:"
echo " apply apply nixos configuration and switch to it"
echo " apply-boot apply nixos configuration on next boot"
echo " test [host] try building configuration of a host (default: current host)"
echo " repl [host] start repl with host configuration (default: current host)"
echo " garbage [age] collect garbage (default: all)"
echo ""
echo "flags:"
echo " --here, -h evaluate configuration in current directory"
}
args=()
for arg in "$@"; do
if [[ "$arg" == -* ]]; then
flag "$arg"
else
args+=("$arg")
fi
done
command="${args[0]:-}"
if [ -z "$command" ]; then
error "no command given!"
echo ""
help_command
exit 1
fi
case "$command" in
help)
help_command
;;
apply)
apply_command
;;
apply-boot)
apply_boot_command
;;
test)
test_command "${args[1]:-}"
;;
repl)
repl_command "${args[1]:-}"
;;
garbage)
garbage_command "${args[1]:-}"
;;
*)
error "unknown command '$command'"
exit 1
;;
esac
|
