project: Add pre-commit hook for clang-format

Automatically reformats the code before committing any changes using clang-format, to ensure that there are no additional reformatting commits needed in the future.

This requires clang-format to be globally available to git, either through path or by directly being in the git bash directory. The hook will only run if a developer actually installs it with install.sh.

.hooks/pre-commit/clang-format.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+if ! hash clang-format 2>/dev/null; then
+	echo "'clang-format' must be installed in a global environment."
+	exit 1
+fi
+
+find ./source -type f -name "*.h" -or -name "*.hpp" -or -name "*.c" -or -name "*.cpp" -exec clang-format -i '{}' \;

install.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+readarray -t hooks < <(find .hooks/ -maxdepth 1 -type d -not -wholename .hooks/ -print0)
+for v in "${hooks[@]}"; do
+	hookname=`basename $v`
+	echo "#!/bin/bash" > .git/hooks/${hookname}
+	echo "find .hooks/${hookname}/ -type f -name '*.sh' -exec '{}' \;" >> .git/hooks/${hookname}
+done