#!/bin/sh
# -*- mode: sh; -*-

# nixup: Deploy a nix flake from the current directory to a remote host.

set -eu

# Make a quick check to see if there is a flake in the current directory
# with deploy-rs as an input.
if [ ! "$(find . -maxdepth 0 -name 'flake.nix')" ] &&
     ! grep -q 'deploy-rs' ./flake.nix; then
  echo "Could not find a flake with 'deploy-rs' in the current directory" >&2
  exit 1
fi

# By default build the configuration on the remote host.
BUILD_LOCAL=false

while getopts ":hl" arg; do
  case "$arg" in
    l) BUILD_LOCAL=true ;;
    h) echo "Usage: nixup [-h] [-l] HOST" >&2
       exit 1
       ;;
    *) printf "Invalid option: -%s\nSee '-h' for usage\n" "$OPTARG" >&2
       exit 1
       ;;
  esac
done
shift $((OPTIND - 1))

if [ "$#" -ne 1 ]; then
  echo "Please specify a host. See '-h' for usage" >&2
  exit 1
fi

deploy_args=".#$1 -s --auto-rollback false"
if [ "$BUILD_LOCAL" != true ]; then
  deploy_args="$deploy_args --remote-build"
fi

# Deploy the configuration.
deploy $deploy_args

# Copy the flake to the remote host.
rsync -ax --delete ./ "$1":/etc/nixos/