#!/bin/sh
# Test the stage2 directory to see whether it passes
# a bootstrap check and/or a check using the tests directory.
# If stage2 passes, binary_step returns an exit status of 0 (true);
# if it fails, binary_step returns an exit status of 1 (false).
#
# binary_step remakes the archive in stage2/library and the executable
# in stage2/compiler. In the intended use, the binary script sets up
# these directories so that these actions cause no recompilations,
# either Mercury to C or C to object, only linking. Other uses probably
# won't work.

usage="\
Usage: $0 [options]
Options:
	-b, --no-bootcheck
		Do not perform a bootcheck; check only the tests directory.
	-c, --compile-only
		Compile only. Do not compare stage2.ok and stage3.
	-h, --help
		Display this usage message.
	-j <num-jobs>, --jobs <num-jobs>
		Run using <num-jobs> different parallel processes.
	-m <mmake-args>, --mmake-args <mmake-args>
		Pass <mmake-args> as options to \`mmake'.
	-o <filename>, --output-file <filename>
		Output results to <filename>.
	-t <testdir>, --test-dir <testdir>
		Execute runtests from the named subdirectory of tests.
"

set -x

alltestdirs="benchmarks general hard_coded invalid valid warnings"

bootcheck="true"
compile_only="false"
jfactor=""
mmake_opts=""
outfile="DIFF.BINARY"
testdirs=""

while [ $# -gt 0 ]; do
	case "$1" in

	-b|--no-bootcheck)
		bootcheck="false" ;;

	-c|--compile-only)
		compile_only="true" ;;

	-h|--help)
		echo "$usage"
		exit 0 ;;

	-j|--jobs)
		jfactor="-j$2"; shift ;;
	-j*)
		jfactor="-j` expr $1 : '-j\(.*\)' `" ;;
	--jobs*)
		jfactor="--jobs` expr $1 : '--jobs\(.*\)' `" ;;

	-m|--mmake)
		mmake_opts="$mmake_opts $2"; shift ;;

	-o|--output-file)
		outfile="$2"; shift ;;
	-o*)
		outfile="` expr $1 : '-o\(.*\)' `"; ;;

	-t|--test-dir)
		testdir="$2"; shift
		if test -d tests/$testdir
		then
			testdirs="$testdirs $testdir"
		else
			if test "$testdir" = "all"
			then
				testdirs="$alltestdirs"
			else
				echo "tests has no subdirectory named $testdir"
			fi
		fi ;;
	-t*)
		testdir="` expr $1 : '-t\(.*\)' `"
		if test -d tests/$testdir
		then
			testdirs="$testdirs $testdir"
		else
			if test "$testdir" = "all"
			then
				testdirs="$alltestdirs"
			else
				echo "tests has no subdirectory named $testdir"
			fi
		fi ;;

	-*)
		echo "$0: unknown option \`$1'" 1>&2
		echo "$usage" 1>&2
		exit 1 ;;

	*)
		echo "$usage" 1>&2
		exit 1 ;;
	esac
	shift
done

root=`/bin/pwd`

MERCURY_COMPILER=$root/stage1/mercury_compile
export MERCURY_COMPILER
MERCURY_INT_DIR=$root/stage2/library
export MERCURY_INT_DIR

MMAKE_VPATH=.
export MMAKE_VPATH
MMAKE_DIR=../scripts
export MMAKE_DIR

# Ensure that mmake will not disturb the .o and .c files placed there by binary

set +x

touch stage2/library/*.c
touch stage2/compiler/*.c

sleep 2

touch stage2/library/*.o
touch stage2/compiler/*.o

# Rebuild the stage2 library and compiler from the components already there.

/bin/rm -f stage2/library/libmercury.a stage2/library/libmercury.so
/bin/rm -f stage2/compiler/mercury_compile

set -x

# the `RM_C=:' ensures that the `.c' files do not get deleted

if (cd stage2/library ; mmake $mmake_opts $jfactor RM_C=: libmercury)
then
	echo "building of stage 2 library successful"
else
	echo "building of stage 2 library not successful"
	exit 1
fi

if (cd stage2/compiler ; mmake $mmake_opts $jfactor RM_C=: mercury_compile)
then
	echo "building of stage 2 compiler successful"
else
	echo "building of stage 2 compiler not successful"
	exit 1
fi

unset MMAKE_VPATH
unset MMAKE_DIR

MERCURY_COMPILER=$root/stage2/compiler/mercury_compile
export MERCURY_COMPILER
MERCURY_INT_DIR=$root/stage3/library
export MERCURY_INT_DIR

if "$bootcheck" = true
then

	# Rebuild the stage3 library and compiler from scratch

	/bin/rm -f stage3/library/*.c
	/bin/rm -f stage3/compiler/*.c

	if (cd stage3 ; mmake $mmake_opts depend_library depend_compiler)
	then
		echo "building of stage 3 dependencies successful"
	else
		echo "building of stage 3 dependencies not successful"
		exit 1
	fi

	MMAKE_VPATH=.
	export MMAKE_VPATH
	MMAKE_DIR=../scripts
	export MMAKE_DIR

	if (cd stage3/library ; mmake -S $mmake_opts $jfactor cs)
	then
		echo "building of stage 3 library successful"
	else
		echo "building of stage 3 library not successful"
		exit 1
	fi

	if (cd stage3/compiler ; mmake -S $mmake_opts $jfactor cs)
	then
		echo "building of stage 3 compiler successful"
	else
		echo "building of stage 3 compiler not successful"
		exit 1
	fi

	if test "$compile_only" = false
	then
		founddiff=false
		cat /dev/null > $outfile
		for dir in library compiler
		do
			for file in stage2.ok/$dir/*.c
			do
				stage3file="stage3/$dir/`basename $file`"
				diff -u $file $stage3file >> $outfile ||
					founddiff=true
			done
		done

		if "$founddiff" = true
		then
			echo "error - stage2.ok and stage3 differ!"
			exit 1
		else
			echo "stage2.ok and stage3 compare ok"
		fi
	fi
fi

for testdir in $testdirs
do
	if (cd tests/$testdir; runtests)
	then
		echo "tests in the $testdir directory successful"
	else
		echo "tests in the $testdir directory not successful"
		exit 1
	fi
done

exit 0