General: add remote build workaround to nixos-operations-script

bin/nixos-operations-script.sh

@@ -8,6 +8,7 @@ hostname=$(/run/current-system/sw/bin/hostname) # The name of the host to build
 flakeDir="${FLAKE_DIR}"                         # Path to the flake file (and optionally the hostname)
 update=false                                    # Whether to update and commmit flake.lock
 user=$(/run/current-system/sw/bin/whoami)       # Which user account to use for git commands
+buildHost=""                                    # Which host to use to generate the build (defaults to the local host)
 remainingArgs=""                                # All remaining arguments that haven't yet been processed (will be passed to nixos-rebuild)
 
 function usage() {
@@ -34,6 +35,11 @@ function usage() {
 POSITIONAL_ARGS=()
 while [[ $# -gt 0 ]]; do
   case "$1" in
+	--build-host)
+		buildHost="$2"
+		shift
+		shift
+		;;
 	--flake|-f)
 		flakeDir="$2"
 		shift
@@ -89,6 +95,12 @@ fi
 
 options="--flake ${flakeDir}#${hostname} ${remainingArgs} --use-remote-sudo --log-format multiline-with-logs"
 
+if [[ -n "${buildHost}" && $operation != "build" && $operation != *"dry"* ]]; then
+	echo "Remote build detected, running this operation first: nixos-rebuild build ${options} --build-host $buildHost"
+	/run/current-system/sw/bin/nixos-rebuild build $options --build-host $buildHost
+	echo "Remote build complete!"
+fi
+
 echo "Running this operation: nixos-rebuild ${operation} ${options}"
 /run/current-system/sw/bin/nixos-rebuild $operation $options