# File: Makefile for keyboard-leds-trayicons
# Location: keyboard-leds-trayicons source package
# Author: bgstack15
# Startdate: 2020-03-17
# Title: Makefile for keyboard-leds-trayicons 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 and logout-manager Makefile
# Improve:
# Document:
#    Includes a nice way to dynamically generate dependencies as self-reported by all the files.
# Dependencies:

APPNAME    = keyboard-leds-trayicons
APPVERSION = 0.0.2
SRCDIR     = $(CURDIR)
prefix     = /usr
SYSCONFDIR = $(DESTDIR)/etc
BINDIR     = $(DESTDIR)$(prefix)/bin
SHAREDIR   = $(DESTDIR)$(prefix)/share
DOCDIR     = $(SHAREDIR)/doc/${APPNAME}
MANDIR     = $(SHAREDIR)/man
APPSDIR    = $(SHAREDIR)/applications
ICONDIR    = $(SHAREDIR)/icons
SYSCONFDIR = $(DESTDIR)/etc
XDGAUTODIR = $(SYSCONFDIR)/xdg/autostart

awkbin     :=$(shell which awk)
cpbin      :=$(shell which cp)
echobin    :=$(shell which echo)
findbin    :=$(shell which find)
grepbin    :=$(shell which grep)
installbin :=$(shell which install)
lnbin      :=$(shell which ln)
rmbin      :=$(shell which rm)
sedbin     :=$(shell which sed)
sortbin    :=$(shell which sort)
trbin      :=$(shell which tr)
truebin    :=$(shell which true)
uniqbin    :=$(shell which uniq)
xargsbin   :=$(shell which xargs)
md2manbin  :=$(shell which go-md2man)
gzipbin    :=$(shell which gzip)

SEPARATOR ?=,

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' --exclude-dir='doc' -A5 -riIE dependencies $(SRCDIR) | ${awkbin} -v 'distro=$(DISTRO)' 'tolower($$0) ~ distro {$$1="";$$2="";print}' | ${trbin} ',' '\n' | ${sedbin} -r -e 's/^\s*//;' -e 's/\*$$//;' | ${sortbin} | ${uniqbin} | ${sedbin} -r -e 's/$$/$(SEPARATOR)/' | ${xargsbin}

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

install: install_files install_man

install_files:
	@${echobin} Installing files to ${DESTDIR}
	${installbin} -d ${SYSCONFDIR} ${BINDIR} ${DOCDIR} \
		${APPSDIR} ${ICONDIR}/hicolor/scalable/status ${XDGAUTODIR}
	${installbin} -m 0644 -t ${SYSCONFDIR} ${SRCDIR}/etc/*.*
	${installbin} -m 0755 -t ${BINDIR} ${SRCDIR}/usr/bin/*
	${installbin} -m 0644 -t ${ICONDIR}/hicolor/scalable/status ${SRCDIR}/usr/share/icons/hicolor/scalable/status/*
	${installbin} -m 0644 -t ${XDGAUTODIR} ${SRCDIR}/etc/xdg/autostart/*
	${installbin} -m 0644 -t ${APPSDIR} ${SRCDIR}/usr/share/applications/*
	${installbin} -m 0644 -t ${DOCDIR} ${SRCDIR}/usr/share/doc/keyboard-leds-trayicons/*

install_man:
ifeq ($(md2manbin),)
	@${echobin} Cannot install man pages, because go-md2man is not found.
	@false
endif
	${installbin} -d ${MANDIR}/man1 ${MANDIR}/man5
	${md2manbin} < ${SRCDIR}/usr/share/man/man1/keyboard-leds-trayicons.1.md | ${gzipbin} > ${MANDIR}/man1/keyboard-leds-trayicons.1.gz
	${md2manbin} < ${SRCDIR}/usr/share/man/man5/keyboard-leds-trayicons.conf.5.md | ${gzipbin} > ${MANDIR}/man5/keyboard-leds-trayicons.conf.5.gz

uninstall:
	@${echobin} SRCDIR=${SRCDIR}
	${rmbin} -f $$( ${findbin} ${SRCDIR} -mindepth 1 ! -type d -printf '%p\n' | ${sedbin} -r -e "s:^${SRCDIR}:${DESTDIR}:" ) $$( ${findbin} ${SRCDIR}/usr/share/man ! -type d -printf '%p\n' | ${sedbin} -r -e "s:^${SRCDIR}:${DESTDIR}:" -r -e 's/\.md$$/.gz/;' )

	# remove all installed directories that are now blank.
	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."