add quiet options

tools/format

@@ -14,14 +14,18 @@ Usage: $me [OPTION]...
 Format C source code
 
 Options:
+   -q, -quiet  silence output
 
-   --help     print this help and exit
-   --version  output version information"
+   --help       print this help and exit
+   --version    output version information"
+
+QUIET=
 
 while test $# -gt 0; do
   case $1 in
     --help) echo "$usage"; exit 0;;
     --version) echo "$version"; exit 0;;
+    --quiet|-q) QUIET=true;;
     -*)
      echo "$0: Unknown option '$1'." >&2
      echo "$0: Try '--help' for more information.'$1'." >&2
@@ -30,5 +34,10 @@ while test $# -gt 0; do
   shift
 done
 
+if [ -z "$QUIET" ]; then
 find . -type f -name '*.c' ! -path './lib/*' ! -path './gcklib/*' -exec clang-format -i --verbose {} +
 find . -type f -name '*.h' ! -path './lib/*' ! -path './gcklib/*' -exec clang-format -i --verbose {} +
+else
+find . -type f -name '*.c' ! -path './lib/*' ! -path './gcklib/*' -exec clang-format -i {} +
+find . -type f -name '*.h' ! -path './lib/*' ! -path './gcklib/*' -exec clang-format -i {} +
+fi