Fix checks for curl/mktemp/growpart presence

bin/uncloud-init

@@ -65,12 +65,12 @@ deploy_ssh_authorized_keys () {
 			return
 	fi
 
-	if [ ! -x "$(command -v curl)" ]; then
+	if ! command -v curl; then
 		echo "Could not find or execute curl. Exiting." >&2
 		exit 1
 	fi
 
-	if [ ! -x "$(command -v mktemp)" ]; then
+	if ! command -v mktemp; then
 		echo "Could not find or execute mktemp. Exiting." >&2
 		exit 1
 	fi
@@ -89,7 +89,7 @@ deploy_ssh_authorized_keys () {
 
 grow_root_partition () {
 	growpart_script='uncloud-init-growpart'
-	if [ -x "$(command -v "$growpart_script")" ]; then
+	if command -v "$growpart_script"; then
 		# TODO: this command seems quite fragile...
 		# sh growpart -q /dev/vda 3 > /dev/null;
 		true # no-op