Continous compile a project using ccach, cmake, inotify-tools and ninja

fast_compile.sh

#!/bin/bash
# sudo apt-get install inotify-tools ninja-build cmake

CURPATH=`pwd`

#Sounds to play.
OKSOUND='/usr/share/sounds/pop.wav'
ERRSOUND='/usr/share/sounds/KDE-K3B-Finish-Error.ogg'

inotifywait -mqr --timefmt '%d/%m/%y %H:%M' --format '%T %w %f %e' \
-e close_write,modify,moved_to,create . | while read date time dir file event; do
	ext="${file##*.}"

	#
	# Ninja Compile
	#
	if [[ "$ext" = "cpp" || "$ext" = "h" ]]; 
	then
		FILECHANGE=${dir}${file}
		# convert absolute path to relative
		FILECHANGEREL=`echo "$FILECHANGE" | sed 's_'$CURPATH'/__'`
		PROCESS_NUM=`ps -ef | grep "ninja" | grep -v "grep" | wc -l`
		if [[ $PROCESS_NUM -eq 1 ]];
		then
			echo -e "At ${time} on ${date}, file $FILECHANGE was changed, but prev build is not finished"
		else
			echo -e "At ${time} on ${date}, file \e[00;31m$FILECHANGE\e[00m was changed. Rebuilding."
			ninja -C build 
			if [[ $? -ne 0 ]];
			then
				echo -e "\E[47;31mBuild Failed\033[0m\n"
				paplay $ERRSOUND
			else
				echo -e "\e[00;32mDone\e[00m\n"
				paplay $OKSOUND
				#git status
			fi
		fi
	fi


	#
	# CMake build
	#
	if [[ "$ext" = "cmake" || "$file" = "CMakeLists.txt" ]]; 
	then
		PROCESS_NUM=`ps -ef | grep "cmake" | grep -v "grep" | wc -l`
		if [[ $PROCESS_NUM -eq 1 ]];
		then
			echo "At ${time} on ${date}, file $FILECHANGE was changed, but cmake is still configuring"
		else
			echo "At ${time} on ${date}, file $FILECHANGE was changed. Rebuilding the project"
			(mkdir -p $CURPATH/build && cd $CURPATH/build && cmake .. -G Ninja)
			ninja -C build
			echo -e "\e[00;32mDone\e[00m\n"
			paplay $OKSOUND
			#git status
		fi
	fi

done