post-update

#!/bin/sh
buildroot=$(git config hooks.autotex.buildroot)
if [ -z "$buildroot" ]; then
	echo "*** No buildroot specified. Quitting." >&2
	exit 1
fi
builddir=$(git config hooks.autotex.projectname)
if [ -z "$builddir" ]; then
	echo "*** No project name specified. Quitting." >&2
	exit 1
fi
custom_texinputs=$(git config hooks.autotex.texinputs)

# change texinputs if set
if [ -n "$custom_texinputs" ]; then
	export TEXINPUTS="$custom_texinputs"
fi
master_name=$(git config hooks.autotex.buildbranch)
if [ -z "$master_name" ]; then
	master_name=$(git config hooks.protectedbranch)
	if [ -z "$master_name" ]; then
		echo "*** No build branch specified. Nothing to do." >&2
		exit 0
	fi
fi
jobname=$(git config hooks.autotex.jobname)
#TODO: pull these from some list, to allow for multiple jobs
if [ -z "$jobname" ]; then
	echo "*** Job name is not set. I don't know what to compile." >&2
	exit 0
fi


case " $@ " in
*" refs/heads/$master_name "*)
	echo "*** Update pushed to $master_name, building TeX file."
	pdflatex_command=$(git config hooks.autotex.pdflatex)
	latexmk_command=$(git config hooks.autotex.latexmk)
	if [ -z "$pdflatex_command" ]; then
		pdflatex_command="pdflatex %O %S"
	fi
	if [ -z "$latexmk_command" ]; then
		latexmk_command="latexmk"
	fi
	workdir="$buildroot$builddir"
	#create working dir if it doesn't exist yet
	if [ ! -d "$workdir" ]; then
		mkdir "$workdir"
		if [ $? -ne 0 ]; then
			echo "*** Failed to create build directory." >&2
			exit 1
		fi
	fi
	publishto=$(git config hooks.autotex.publishto)
	git --work-tree="$workdir" --git-dir="$GIT_DIR" checkout -f
	cd "$workdir"
	rm "$jobname.pdf"
	$latexmk_command -pdflatex="$pdflatex_command" -pdf "$jobname.tex" >> latexmk_build.log
	if [ $? -ne 0 ]; then
		echo "*** Failed to build notes" >&2
		exit 1
	fi
	# publish if publishto is set
	if [ -n "$publishto" ]; then
		cp "$jobname.pdf" "$publishto"
		if [ $? -ne 0 ]; then
			echo "*** Failed to copy $jobname.pdf to $publishto" >&2
			exit 1
		else
			echo "$jobname.pdf was published to $publishto"
			exit 0
		fi
	else
		echo "*** Publish location not set. Job done."
		exit 0
	fi
	;;
esac
echo "No build refs pushed. Nothing to do."