clangify only the different files (#3122)

clangify.sh

@@ -1,18 +1,22 @@
 #!/bin/bash
 
-# This script will run clang-format on all non-3rd-party C++/Header files.
+# This script will run clang-format on all modified, non-3rd-party C++/Header files.
 
 set -e
 
-if hash clang-format 2>/dev/null; then
-	find . \( -name "*.cpp" -o -name "*.h" \) \
+if hash clang-format 2>/dev/null && hash git 2>/dev/null; then
+	files_to_clean=($(git diff --name-only $(git merge-base origin/master HEAD)))
+
+	printf "%s\n" ${files_to_clean[@]} | \
+		xargs -I{} find '{}' \( -name "*.cpp" -o -name "*.h" \) \
 		-not -path "./cockatrice/src/qt-json/*" \
 		-not -path "./servatrice/src/smtp/*" \
 		-not -path "./common/sfmt/*" \
 		-not -path "./oracle/src/zip/*" \
 		-not -path "./build*/*" \
 		-exec clang-format -style=file -i {} \;
-	echo "Repository properly formatted"
+	echo "Successfully formatted following files:"
+	printf "%s\n" ${files_to_clean[@]}
 else
-	echo "Please install clang-format to use this program"
+	echo "Please install clang-format and git to use this program"
 fi