Add option to apply configuration during next boot

README.md

@@ -29,6 +29,12 @@ Change some defaults if they don't fit.
 bij apply astatine --no-use-remote-sudo --no-use-substitutes
 ```
 
+Apply change during next boot:
+
+```
+bij apply astatine --on-next-boot
+```
+
 Sometimes it is required to execute some commands on a host directly.
 
 ```

bij.sh

@@ -4,6 +4,7 @@ set -euo pipefail
 
 FLAKE=
 TARGET=
+ON_NEXT_BOOT=
 USE_SUBSTITUTES="1"
 USE_REMOTE_SUDO="1"
 
@@ -22,6 +23,10 @@ while [[ $# -gt 0 ]]; do
 		shift
 		shift
 		;;
+	--on-next-boot)
+		ON_NEXT_BOOT="1"
+		shift
+		;;
 	--use-substitutes)
 		USE_SUBSTITUTES="1"
 		shift
@@ -95,9 +100,15 @@ if [[ -n "${USE_REMOTE_SUDO}" ]]; then
 	APPLY_OPTS+=("--use-remote-sudo")
 fi
 
+APPLY_OPERATION="switch"
+
+if [[ -n "${ON_NEXT_BOOT}" ]]; then
+	APPLY_OPERATION="boot"
+fi
+
 case "${COMMAND}" in
 apply)
-	nixos-rebuild switch --flake "${FLAKE_STORE_PATH}#${HOST}" --target-host "${TARGET}" "${APPLY_OPTS[@]}"
+	nixos-rebuild "${APPLY_OPERATION}" --flake "${FLAKE_STORE_PATH}#${HOST}" --target-host "${TARGET}" "${APPLY_OPTS[@]}"
 	;;
 build)
 	nixos-rebuild build --flake "${FLAKE_STORE_PATH}#${HOST}"