############################################################################
# Copyright 2009-2013 Benjamin Kellermann, John                            #
#                                                                          #
# This program is free software: you can redistribute it and/or modify it  #
# under the terms of the GNU General Public License as published by the    #
# Free Software Foundation, either version 3 of the License, or (at your   #
# option) any later version.                                               #
#                                                                          #
# This program is distributed in the hope that it will be useful, but      #
# WITHOUT ANY WARRANTY; without even the implied warranty of               #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        #
# General Public License for more details.                                 #
#                                                                          #
# You should have received a copy of the GNU General Public License along  #
# with this program.  If not, see <http://www.gnu.org/licenses/>.          #
############################################################################

############################################################################
# This is a Makefile to compile LaTeX files                                #
# try: make watch                        # requires inotifytools           #
#      make watchtikz_<picturefile>                                        #
############################################################################

# the documents to be compiled by default
#DOC=$(foreach i,$(shell grep -l documentclass *.tex), $(basename $i))
DOC=datenschleuder97
# if svgs should be compiled as pdf or png
SVG_TARGET_EXT=pdf

# your favorite pdf viewer 
# (I recommend evince or okular as they update rebuilt pdfs automatically)
#PDFVIEWER=evince
PDFVIEWER=okular --unique

# the command to call latex, e.g. pdflatex or xelatex
# LATEXCMD=xelatex -interaction=nonstopmode -synctex=1
#
#TEXMFHOME="/path/to/new/texmfhome:$(kpsewhich -var-value TEXMFHOME)"
LATEXCMD=lualatex -interaction=nonstopmode -synctex=1

# (for automatic compiling .svg (inkscape) or .tex (pgf))
PICDIR=bilder

# should the declaration \pgfrealjobname{} be checked?
CHECKPGFREALJOBNAME=true

#shut the make up
VERBOSE ?= @

PRINTF ?= printf

# all extensions which should be deleted with make clean
TEXEXT=log aux toc synctex.gz synctex.gz\(busy\) pdfsync
# hyperref
TEXEXT+=out
# bibtex
TEXEXT+=bbl blg
# thumbpdf
TEXEXT+=tpt
# makeindex
TEXEXT+=ist
# glossaries
TEXEXT+=glo glg gls
# latex-beamer
TEXEXT+=nav snm
# ntheorem
TEXEXT+=thm
# changebar
TEXEXT+=cb2 cb
# todonotes
TEXEXT+=tdo
# insdljs
TEXEXT+=djs
# vim-latexsuite
TEXEXT+=tex.latexmain
# other stuff, whereever it came from
TEXEXT+=url ilg brf lof lot loc nav nlo snm idx

PIC=$(addsuffix .$(SVG_TARGET_EXT),$(basename $(wildcard $(PICDIR)/*.svg))) 
PIC+=$(foreach i,$(wildcard *.tex.erb),$(shell basename $i .erb))

TIKZPIC=$(addsuffix .pdf,$(foreach i,$(wildcard $(PICDIR)/*.tex),$(shell basename $i .tex)))

default: $(foreach i,$(DOC),$i.pdf)

$(PICDIR): $(PIC)

tikzpics: $(TIKZPIC)

$(DOC)_notes.pdf: $(DOC).pdf

STY=$(foreach i,$(wildcard *.dtx),$(shell basename $i .dtx).sty)


build-dep: $(foreach i,$(DOC),build-dep_$i)
build-dep_%:
	make $*.tex $(PIC)
	make $(STY)

%.pdf: %.tex $(wildcard *.tex) $(PIC) $(wildcard tikz/*.tikz) $(wildcard *.sty) $(STY)
	$(call checkForRunningProcess,$*)
	$(call checkForPGFrealjobname,$*)
	$(VERBOSE)$(LATEXCMD) $*
	make $*.bbl
	if [ "`grep makeglossaries *.tex`" ];then\
		make $*.gls;\
	fi
	$(VERBOSE) $(LATEXCMD) $*
	$(VERBOSE) $(LATEXCMD) $*

final: $(foreach i,$(DOC),$i_final.pdf)
%_final.pdf: %.pdf
	$(call checkForRunningProcess,$*)
	make $*.tpt
	$(LATEXCMD) $*
	qpdf --linearize $*.pdf $*_tmp.pdf
	mv $*_tmp.pdf $*.pdf
	cp $*.pdf $*_final.pdf

clean:
	@rm -vf $(foreach ext,$(TEXEXT),*.$(ext))
	@rm -vf $(PIC) $(TIKZPIC) $(STY)
	@rm -vf $(foreach i,$(DOC),$i_notes.tex)

distclean: $(foreach i,$(DOC),distclean_$i)
distclean_%: clean
	rm -f $(foreach ext,.pdf _notes.pdf,$*$(ext))

checkForRunningProcess = \
	@if [ -f /tmp/$(1)_watch.pid ];then\
		WATCHID=`cat /tmp/$(1)_watch.pid`;\
		if [ `ps --pid $$WATCHID|wc -l` = 2 ];then\
			$(PRINTF) "\033[31mThere is a \"make watch\" running!\033[0m\n";\
			return 1;\
		fi;\
	fi
	
ifeq ($(CHECKPGFREALJOBNAME),true)
checkForPGFrealjobname = \
	@if [ "`grep pgfrealjobname *.tex`" ];then\
		PGFREALJOBNAMEOCCURED=false;\
		for PGFREALJOBNAME in `grep pgfrealjobname *.tex|cut -f2 -d\{|cut -f1 -d\}`; do\
			if [ "$$PGFREALJOBNAME" = "$*" ];then\
				PGFREALJOBNAMEOCCURED=true;\
			fi;\
		done;\
		if [ "$$PGFREALJOBNAMEOCCURED" = "false" ]; then\
			$(PRINTF) "\033[31m\\pgfrealjobname{} is set to a wrong value! I expected:\n\\pgfrealjobname{$*}\033[0m\n";\
			return 1;\
		fi;\
	fi
else
checkForPGFrealjobname = 
endif

cpTmp = \
	zcat $$COMPILEFILE.synctex.gz |sed -e 's!^Input:\([[:digit:]]*\):\([^/]\)!Input:\1:$(shell pwd)/\2!g'|gzip >/tmp/$(1).synctex.gz;\
	cp $$COMPILEFILE.pdf /tmp/$(1).pdf;\

ifeq ($(wildcard ~/texmf/),)
ADDITIONALDIRS=
else
ADDITIONALDIRS=$(wildcard ~/texmf/)
endif

watch: $(foreach i,$(DOC),watch_$i)
watch_%: %.pdf
	$(call checkForRunningProcess,$*)
	$(PRINTF) $$PPID > /tmp/$*_watch.pid
	if [ `ls -l *.tex.latexmain|wc -l` != 1 ]; then\
			rm -fv *.tex.latexmain;\
			touch $*.tex.latexmain;\
		fi;\
		COMPILEFILE=`basename *.tex.latexmain .tex.latexmain`;\
		$(call cpTmp,$*)\
		if [ -z "`ps x |grep "$(PDFVIEWER) /tmp/$*.pdf" |grep -v grep`" ];then $(PDFVIEWER) /tmp/$*.pdf; fi&\
		while true; do\
			FILE=`inotifywait -r -e close_write --format="%w%f" --exclude '(/[^\\.]*\$$|\\.swp\$$|qt_temp\\..*)' . $(ADDITIONALDIRS) 2>/dev/null`;\
			EXT=`$(PRINTF) $$FILE|sed -e 's/^.*\.\([^.]*\)$$/\1/g'`;\
			FILEBASENAME=`basename $$FILE .$$EXT`;\
			LACHECK=false;\
			if [ `ls -l *.tex.latexmain|wc -l` = 1 ];then COMPILEFILE=`basename *.tex.latexmain .tex.latexmain`; fi;\
			case $$EXT in\
			tex)\
				if [ -f $${FILEBASENAME}_notes.tex ]; then make $${FILEBASENAME}_notes.tex; fi;\
				if [ "`$(PRINTF) $$FILE|grep '^\./$(PICDIR)/'`" != "" ]; then make $$FILEBASENAME.pdf; fi;\
				LACHECK=true;;\
			sty|cls) LACHECK=true;;\
			dtx)\
				make $$FILEBASENAME.sty;\
				LACHECK=true;;\
			pdf|png|jpg);;\
			bib)\
				bibtex $$COMPILEFILE;\
				$(LATEXCMD) $$COMPILEFILE;\
				LACHECK=true;;\
			svg) make $(PICDIR)/$$FILEBASENAME.$(SVG_TARGET_EXT);;\
			erb) make $$FILEBASENAME;;\
			*)\
				$(PRINTF) "$$FILE was modified and I don't know what to do!\n";\
				continue;;\
			esac;\
			/usr/bin/time -f "%e seconds needed for one compile round." -o /tmp/make_watch_duration $(LATEXCMD) $$COMPILEFILE;\
			if [ $$? -eq 0 ];then\
				if [ "`grep 'LaTeX Warning: Citation .* on page .* undefined' $$COMPILEFILE.log`" ];then\
					bibtex $$COMPILEFILE;\
					BIBTEX=true;\
				else\
					BIBTEX=false;\
				fi;\
				if [ "`grep 'pdfTeX warning (dest): name{glo:.*} has been referenced but does not' $$COMPILEFILE.log`" ];then\
					makeglossaries $$COMPILEFILE;\
					GLOSSARIES=true;\
				else\
					GLOSSARIES=false;\
				fi;\
				if [ $$BIBTEX = true -o $$GLOSSARIES = true ];then\
					$(VERBOSE) $(LATEXCMD) $$COMPILEFILE;\
					$(VERBOSE) $(LATEXCMD) $$COMPILEFILE;\
				fi;\
				if [ $$LACHECK = true ];then lacheck $$FILE; fi;\
				cat /tmp/make_watch_duration;\
				notify-send --expire-time=1000 --hint=int:transient:1 -a "LaTeX" "pdflatex compiled successfull" "`cat /tmp/make_watch_duration`";\
				if [ $$BIBTEX = true ];then $(PRINTF) "\033[33mI ran BibTeX, therefore compilation took a bit longer.\033[0m\n"; fi;\
				if [ $$GLOSSARIES = true ];then $(PRINTF) "\033[33mI ran makeglossaries, therefore compilation took a bit longer.\033[0m\n"; fi;\
				$(call cpTmp,$*)\
			else\
				if [ $$LACHECK = true ];then lacheck $$FILE; fi;\
				$(PRINTF) "\033[31mSOMETHING WENT WRONG, PLEASE CHECK THE CONSOLE!!!\033[0m\n";\
				notify-send --expire-time=1000 --hint=int:transient:1 "ERROR: pdflatex; Compilefile: $$COMPILEFILE";\
			fi;\
		done

watchtikz_%: %.pdf
	cp $< /tmp/
	if [ -z "`ps x |grep "$(PDFVIEWER) /tmp/$<" |grep -v grep`" ];then $(PDFVIEWER) /tmp/$<; fi&
	while true; do\
		inotifywait -r -e close_write --exclude '(/[^\\.]*\$$|\\.swp\$$)' $(PICDIR) 2>/dev/null;\
		$(LATEXCMD) --jobname=$* $(DOC);\
		if [ $$? -eq 0 ];then\
			cp $*.pdf /tmp/$<;\
		else\
			$(PRINTF) "\033[31mSOMETHING WENT WRONG, PLEASE CHECK THE CONSOLE!!!\033[0m\n";\
		fi;\
	done

.PHONY: default final clean distclean watch tikzpics $(PICDIR) build-dep

.SECONDARY:

%.sty: %.dtx %.ins
	rm -f $@
	$(LATEXCMD) $*.ins

%.tex: %.tex.erb *.rb
	erb $< >$@

%.bbl: %.aux $(wildcard *.bib)
	if test "`grep citation $*.aux`" -a "`grep 'bibliography{.*}' $*.tex`"; then bibtex $*; fi

%.tpt: %.pdf 
	thumbpdf $< 

%.gls: $(wildcard *.tex)
	makeglossaries $*
	$(LATEXCMD) $*
	makeglossaries $*

$(PICDIR)/%.pdf: $(PICDIR)/%.svg
	inkscape --export-pdf=$@ -T $<

%.pdf: $(PICDIR)/%.tex
	$(VERBOSE) $(LATEXCMD) --jobname=$* $(DOC)
	$(VERBOSE) $(LATEXCMD) --jobname=$* $(DOC)
	$(VERBOSE) $(LATEXCMD) --jobname=$* $(DOC)

$(PICDIR)/%.png: $(PICDIR)/%.svg
	inkscape --export-png=$@ -w1000 $<

$(PICDIR)/%_gray.png: $(PICDIR)/%.png
	convert -colorspace gray $< $@