Makefile.nvtop

SHELL := /usr/bin/zsh

INSTALL_AT := /opt/nvtop

SRC_FOLDER := ~/src/git-nvtop

ENV_FILE := /etc/environment
ENV_TEMP := /tmp/$(notdir ${ENV_FILE})
PACKAGES := git cmake libncurses-dev

AWK_SCRIPT := /^PATH=/ { \
	split ($$0, kv, "\""); \
	paths=kv[2]; \
	if (paths !~ /$(subst /,\/,${INSTALL_AT})\/bin/) \
	  paths=sprintf("%s:%s",paths,"${INSTALL_AT}/bin"); \
	printf("%s\"%s\"\n",kv[1],paths);}


build : ${SRC_FOLDER}/build
	cd $< ; make

${SRC_FOLDER} :
	[ -d $@ ] \
	  && { cd $@ ; git pull } \
	  || { \
	    [ -d $(@D) ] || mkdir -p $(@D) ; \
	    git clone 'https://github.com/Syllo/nvtop.git' $@ \
	    }

%/build : %
	[ -d $@ ] || mkdir -p $@
	$(MAKE) -f $(firstword ${MAKEFILE_LIST}) ensure-packages
	cd $@ ; \
	  cmake .. -DCMAKE_INSTALL_PREFIX=${INSTALL_AT} \

install : ${SRC_FOLDER}/build
	cd $< ; make install
	$(MAKE) -f $(firstword ${MAKEFILE_LIST}) update-environment

update-environment :
	cp ${ENV_FILE} ${ENV_TEMP}
	gawk '${AWK_SCRIPT}' < ${ENV_TEMP} > ${ENV_FILE}
	-cat ${ENV_TEMP} | grep -v '^PATH=' >> ${ENV_FILE}

ensure-packages : ${PACKAGES:%=${SRC_FOLDER}/build/ensure-package-%}

${SRC_FOLDER}/build/ensure-package-% :
	aptitude search "~i$*" || sudo apt install $*

clean :
	rm -rf ${SRC_FOLDER}/build