# File: Makefile for logout-manager
# Location: logout-manager source package
# Author: bgstack15
# Startdate: 2020-03-10
# Title: Makefile for logout-manager source package
# Purpose: To use traditional Unix make utility
# History:
# Usage:
# Reference:
#    https://stackoverflow.com/questions/4219255/how-do-you-get-the-list-of-targets-in-a-makefile/26339924#26339924
#    https://stackoverflow.com/questions/19105241/how-do-you-conditionally-call-a-target-based-on-a-target-variable-makefile/19107231#19107231
#    https://stackoverflow.com/questions/5917576/sort-a-text-file-by-line-length-including-spaces
#    https://superuser.com/questions/352289/bash-scripting-test-for-empty-directory/667100#667100
#    bgscripts Makefile
# Improve:
# Document:
# Dependencies:

APPNAME    = logout-manager
APPVERSION = 0.0.1
SRCDIR     = $(CURDIR)
prefix     = /usr
SYSCONFDIR = $(DESTDIR)/etc
DEFAULTDIR = $(DESTDIR)/etc/sysconfig
# for debian use '$(DESTDIR)/etc/default'
BINDIR     = $(DESTDIR)$(prefix)/bin
SHAREDIR   = $(DESTDIR)$(prefix)/share
LIBEXECDIR = $(DESTDIR)$(prefix)/libexec
DOCDIR     = $(SHAREDIR)/doc/$(APPNAME)
APPDIR     = $(SHAREDIR)/$(APPNAME)
APPSDIR    = $(SHAREDIR)/applications

awkbin     :=$(shell which awk)
cpbin      :=$(shell which cp)
echobin    :=$(shell which echo)
findbin    :=$(shell which find)
grepbin    :=$(shell which grep)
installbin :=$(shell which install)
rmbin      :=$(shell which rm)
sedbin     :=$(shell which sed)
sortbin    :=$(shell which sort)
truebin    :=$(shell which true)
xargsbin   :=$(shell which xargs)
lnbin      :=$(shell which ln)

all:
	${echobin} "No compilation in this package."

.PHONY: clean install uninstall list deplist deplist_opts

list:
	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | ${awkbin} -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | ${sortbin} | ${grepbin} -E -v -e '^[^[:alnum:]]' -e '^$@$$'

deplist:
	@if test -z "$(DISTRO)" ; then ${echobin} "Please run \`make deplist\` with DISTRO= one of: `make deplist_opts 2>&1 1>/dev/null | ${xargsbin}`. Aborted." ; exit 1 ; fi
	@${grepbin} -h --exclude='Makefile' -A5 -riIE dependencies $(SRCDIR) | awk -v 'distro=$(DISTRO)' 'tolower($$0) ~ distro {$$1="";$$2="";print}' | sort | uniq | xargs

deplist_opts:
	@${echobin} "el7" 1>&2
	@${echobin} "devuan" 1>&2

install:
	@${echobin} Installing files to ${DESTDIR}
	${installbin} -d ${SYSCONFDIR} ${DEFAULTDIR} ${BINDIR} ${APPSDIR} ${APPDIR} ${DOCDIR}
	${cpbin} -pr ${SRCDIR}/etc/*.* ${SYSCONFDIR}
	${cpbin} -pr ${SRCDIR}/etc/sysconfig/* ${DEFAULTDIR}
	${cpbin} -pr ${SRCDIR}/usr/bin/* ${BINDIR}
	${cpbin} -pr ${SRCDIR}/usr/share/applications/* ${APPSDIR}
	${cpbin} -pr ${SRCDIR}/usr/share/${APPNAME}/*.* ${APPDIR}
	${cpbin} -pr ${SRCDIR}/usr/share/doc/${APPNAME}/* ${DOCDIR}
	# symlink, when alternatives is not being used
	${lnbin} -s logout-manager-gtk.py ${BINDIR}/logout-manager

uninstall:
	@${echobin} SRCDIR=${SRCDIR}
	${rmbin} -f $$( ${findbin} ${SRCDIR} -mindepth 1 ! -type d -printf '%p\n' | ${sedbin} -r -e "s:^${SRCDIR}:${DESTDIR}:" ) ${DEFAULTDIR}/${APPNAME} ${BINDIR}/logout-manager

	# absolute minimum directories to remove
	#${rmbin} -rf ${APPDIR} ${SYSCONFDIR}/${APPNAME} ${DOCDIR}

	# remove all installed directories that are now blank.
	rmdir ${DEFAULTDIR} 2>/dev/null ; for word in $$( ${findbin} ${SRCDIR} -mindepth 1 -type d -printf '%p\n' | ${sedbin} -r -e "s:^${SRCDIR}:${DESTDIR}:" | ${awkbin} '{ print length, $$0 }' | sort -rn | ${awkbin} '{print $$2}' ) ; do ${findbin} $${word} -mindepth 1 1>/dev/null 2>&1 | read 1>/dev/null 2>&1 || { rmdir "$${word}" 2>/dev/null || ${truebin} ; } ;  done

clean:
	-${echobin} "target $@ not implemented yet! Gotta say unh."