Added a tidy script

Makefile

@@ -96,9 +96,6 @@ clean:
 	$(RM) -r $(RELEASE) $(DEBUG)
 	$(RM) default.profraw testcov.profdata
 
-tidy:
-	clang-tidy -checks='cert-*' -header-filter='.*' $(SRC_FILES) -- --std=c++20 -Iinclude $(pkg-config --cflags libpng) -Idoctest-2.4.11 -Ipng++-0.2.9 -Ifmt-10.0.0/include
-
 release: $(RELEASE_TARGET) $(RELEASE_TEST_TARGET)
 	@:
 

tidy.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+usage() {
+    cat <<EOF
+Usage: tidy.sh <file ...>
+       tidy.sh --help
+
+Run \`clang-tidy' on the provided source files.
+
+Options:
+    -h, --help      Print this help and exit.
+
+EOF
+}
+
+usage_exit_ok() {
+    usage
+    exit
+}
+
+usage_exit_error() {
+    usage
+    exit 1
+}
+
+parse_params() {
+    while :; do
+        case "${1-}" in
+            -h | --help) usage_exit_ok ;;
+            -?*) die "Unknown option: $1" ;;
+            *) break ;;
+        esac
+        shift
+    done
+
+    args=("$@")
+    [[ ${#args[@]} -lt 1 ]] && usage_exit_error
+
+    return 0
+}
+
+parse_params "$@"
+clang-tidy \
+    -checks='cert-*' \
+    -header-filter='.*' \
+    "${args[@]}" \
+    -- \
+    --std=c++20 \
+    -Iinclude \
+    $(pkg-config --cflags libpng) \
+    -Idoctest-2.4.11 \
+    -Ipng++-0.2.9 \
+    -Ifmt-10.0.0/include