#!/bin/bash -x
#
# here, we check a release for every possible enable/disable combination.

# we enable or disable according to a bit combination of length #packets
packets=("debug" "qtgui" "jobmarket" "vmg" "ecut") #"python"
length=${#packets[*]}
end=`units "2^$length" | awk -F": " {'print $2'}`

function bitcheck {
	# $1 is the bit array
	# $2 is the length of the bit array
	# $3 is the bit to check (starting at 0)
	# we print 0 or 1 depending on the bit
	let inverse=$2-$3-1
	bits=$1
	while [ $inverse -gt 0 ]; do
		let bits=$bits/2
		((inverse-=1))
	done
	let bit=$bits%2
	echo $bit
}

if [ -z $1 ]; then
	echo "Usage: $0 <source repo> <path where to check> <commit> [configure flags]"
	exit 1
fi
SOURCEDIR="$1"
shift
DIR="$1"
shift
commit="$1"
shift

# variables to define
LOG="`pwd`/commitcheck-${commit}"
checkdir="commitchecking"
cores=12

# check whether target is empty and create clone of git repo
if [ -e $DIR ]; then
	echo "Target directory $DIR must not be present!"
	exit 255
fi
echo -e "#Begin of Logfile" >${LOG}.log
git clone $SOURCEDIR $DIR | tee -a ${LOG}.log
DIR=`realpath $DIR`
if [ ! $? -eq 0 ]; then
	echo "Please install realpath package!"
	exit 128
fi
OLDDIR=`pwd`
cd $DIR

i=0
while [ $i -lt $end ]; do

# GENERATING configure line
	configureline="--enable-python "
	j=0
	while [ $j -lt ${#packets[*]} ]; do
		bit=`bitcheck $i $length $j`
		if [ $bit -eq 0 ]; then
			configureline=${configureline}" --disable-${packets[$j]}"
		else
			configureline=${configureline}" --enable-${packets[$j]}"
		fi
		((j+=1))
	done

# PERFORMING CHECKS
	git checkout -f ${commit}
	# copy some overrides
	for testfile in `find tests -name 'Makefile.am'`; do
		sed -i -e "s#max_jobs = 4#max_jobs = $cores#" $testfile
	done
	./bootstrap
	rm -rf $checkdir
	mkdir -p $checkdir
	cd $checkdir
	echo "Now testing version `git describe --dirty --always` with $configureline" &>${LOG}-${i}.log
	../configure --prefix=${DIR}/$checkdir ${configureline} "$@" &>>${LOG}-${i}.log
	make -k -j${cores} check &>>${LOG}-${i}.log
	resultcode=$?
	# add failed testsuite.logs
	echo "#################################################################################" >>${LOG}-${i}.log
	for failedlog in `find tests/ -regex '.*/[0-9]*/.*' -name 'testsuite.log' -exec grep -l "FAILED" {} \;`; do
		echo -e "\t$failedlog" >>${LOG}-${i}.log
		echo "#################################################################################" >>${LOG}-${i}.log
		cat <$failedlog >>${LOG}-${i}.log
		echo "#################################################################################" >>${LOG}-${i}.log
	done
	if [ $resultcode -gt 0 ]; then
		echo -e "${i}: `git describe --dirty --always`, ${configureline}: FAILED." >>${LOG}.log
	else
		echo -e "${i}: `git describe --dirty --always`, ${configureline}: ok." >>${LOG}.log
	fi
	cd ..

	((i+=1))
done
cd $OLDDIR