add cmd check

.hooks/pre-commit

@@ -14,15 +14,19 @@ changed_files=$(git diff-index --cached $against | \
 	grep -E '[MA]	.*\.(c|cpp|cc|cxx)$' | cut -d'	' -f 2)
 
 
-if [ -n "$changed_files" ]; then
-	cppcheck --enable=warning,performance,portability --inline-suppr --error-exitcode=1 --platform=win64 --force $changed_files
-	err=$?
-	if [ $err -ne 0 ]; then
-		echo "[rt-thread][cppcheck] we found a obvious fault, please fix the error then commit again"
-		exit $err
-	else
-		echo "[rt-thread][cppcheck] cppcheck ok."
+if which cppcheck > /dev/null; then 
+	if [ -n "$changed_files" ]; then
+		cppcheck --enable=warning,performance,portability --inline-suppr --error-exitcode=1 --platform=win64 --force $changed_files
+		err=$?
+		if [ $err -ne 0 ]; then
+			echo "[rt-thread][cppcheck] we found a obvious fault, please fix the error then commit again"
+			exit $err
+		else
+			echo "[rt-thread][cppcheck] cppcheck ok."
+		fi
 	fi
+else
+    echo "cppcheck does not exist" 
 fi
 
 # We only filter the file name with c or cpp or h file.
@@ -30,30 +34,37 @@ fi
 changed_files=$(git diff-index --cached $against | \
 	grep -E '[MA]	.*\.(c|cpp|h)$' | cut -d'	' -f 2)
 
-
-if [ -n "$changed_files" ]; then
-	astyle --style=allman --indent=spaces=4 --indent=spaces=4 --indent=spaces=4 --pad-header --pad-header --pad-header --align-pointer=name --lineend=linux --convert-tabs --verbose  $changed_files
-	err=$?
-	if [ $err -ne 0 ]; then
-		echo "[rt-thread][astyle] we found a obvious fault, please fix the error then commit again"
-		exit $err
-	else
-		echo "[rt-thread][astyle] astyle file ok"
+if which astyle > /dev/null; then 
+	if [ -n "$changed_files" ]; then
+		astyle --style=allman --indent=spaces=4 --indent=spaces=4 --indent=spaces=4 --pad-header --pad-header --pad-header --align-pointer=name --lineend=linux --convert-tabs --verbose  $changed_files
+		err=$?
+		if [ $err -ne 0 ]; then
+			echo "[rt-thread][astyle] we found a obvious fault, please fix the error then commit again"
+			exit $err
+		else
+			echo "[rt-thread][astyle] astyle file ok"
+		fi
 	fi
+else
+    echo "astyle does not exist" 
 fi
 
-
 # We only filter the file name with c or cpp file.
 changed_files=$(git diff-index --cached $against | \
 	grep -E '[MA]	.*\.(c|cpp|h)$' | cut -d'	' -f 2)
 # formatting check
 # https://github.com/mysterywolf/formatting
 # formatting cmd ref https://github.com/supperthomas/git_auto_script
-if [ -n "$changed_files" ]; then
-	formatting $changed_files
-	echo "[rt-thread] formatting $changed_files is ok"
-	git add $changed_files
-	exit 0
+if which formatting > /dev/null; then 
+	if [ -n "$changed_files" ]; then
+		formatting $changed_files
+		echo "[rt-thread] formatting $changed_files is ok"
+		git add $changed_files
+		exit 0
+	fi
+else
+    echo "formatting does not exist" 
 fi
+
 exit 0