chore: Enforce minimum clang-format version

format.sh

@@ -1,29 +1,31 @@
 #!/bin/bash
 
-utility="clang-format"
-utility_version="$("$utility" --version 2>/dev/null)" || {
+validate() {
+	utility="clang-format"
+	utility_version="$("$utility" --version 2>/dev/null)" || {
 		echo "$utility not found in path!"
 		exit 1
-}
+	}
 
-regex="version ([0-9]+).([0-9]+).([0-9]+)"
-declare -i major=0
-declare -i minor=0
-declare -i patch=0
-declare -i required_major=9
-declare -i required_minor=0
-declare -i required_patch=0
+	regex="version ([0-9]+).([0-9]+).([0-9]+)"
+	declare -i major=0
+	declare -i minor=0
+	declare -i patch=0
+	declare -i required_major=9
+	declare -i required_minor=0
+	declare -i required_patch=0
 
-if [[ "$utility_version" =~ $regex ]]; then
+	if [[ "$utility_version" =~ $regex ]]; then
 		major="${BASH_REMATCH[1]}"
 		minor="${BASH_REMATCH[2]}"
 		patch="${BASH_REMATCH[3]}"
-fi
+	fi
 
-if ((major < required_major)) || ((minor < required_minor)) || ((patch < required_patch)); then
+	if ((major < required_major)) || ((minor < required_minor)) || ((patch < required_patch)); then
 		echo "$utility $required_major.$required_minor.$required_patch required, but is $major.$minor.$patch"
 		exit 1
-fi
+	fi
+}
 
 help() {
 	echo "Usage: $0 [OPTION]..."
@@ -52,7 +54,7 @@ format() {
 }
 
 case $1 in
-  "-h" | "--help") help ;;
-  "-d" | "--dry-run") dry_run ;;
-  "") format ;;
+"-h" | "--help") help ;;
+"-d" | "--dry-run") validate && dry_run ;;
+"") validate && format ;;
 esac