#!/usr/bin/env fish
# update server with nixos-rebuild

if test (path basename $PWD) != nixfiles
    echo "not in nixfiles directory!" >&2
    return 1
end

argparse --move-unknown "r/remote&" "b/build-host=&" -- $argv

set --local target (status basename)
set --local action (if test -n "$argv[1]"; echo $argv[1]; else echo "switch"; end)
set --local build_host $_flag_build_host $target

if set --query _flag_remote; or set --query _flag_build_host
    set --function build_host_arg --build-host $build_host[1]
end

nh os $action \
    --file . nixosConfigurations.{$target} \
    $build_host_arg \
    --use-substitutes \
    --target-host {$target} \
    --show-trace \
    --elevation-strategy=passwordless \
    $argv_opts