#!/bin/sh
#
# Run a test executable. Output nothing if test passes,
# show the output if it fails. Leave output in <test>.log for 
# examination. 
# 
# If $VALGRIND if is set run under valgrind. If there are
# valgrind erros show valgrind output, also leave it in
# <test>.valgrind for examination.
#

vg_failed() {
    cat $VG_LOG 1>&2
    echo $1 1>&2
    exit 1
}

vg_check()
{
    test -f $VG_LOG || vg_failed Valgrind log file $VG_LOG missing.
    # Ensure there is an ERROR SUMMARY line.
    grep -E '^==[0-9]+== ERROR SUMMARY:' $VG_LOG > /dev/null || \
	vg_failed "No valgrind ERROR SUMMARY line in $$vg_failed."
    # Ensure that the number of errors is 0.
    grep -E '^==[0-9]+== ERROR SUMMARY: [^0] ' $VG_LOG > /dev/null && \
	vg_failed "Valgrind reported errors in $vg_out; see above." 
    # Check for leaks.
    grep -E '^==[0-9]+== +.* lost: [^0]' $VG_LOG && \
	vg_failed "Found memory leaks (see log file, $VG_LOG); see above."
    true
}

# Export variables from makefile.
export VALGRIND srcdir

VG_LOG="$1.vglog"
TEST_LOG="$1.log"
rm -f $VG_LOG $TEST_LOG

if grep -l "^# Generated by .*libtool" "$1" >/dev/null 2>&1; then
    # This is a libtool "executable". Valgrind it if VALGRIND specified.
    test -n "$VALGRIND" && VALGRIND="$VALGRIND --log-file-exactly=$VG_LOG --"
    # Hide output unless there's an error.
    libtool --mode=execute $VALGRIND "$@" >$TEST_LOG 2>&1 || {
	ERROR=$?
	cat $TEST_LOG  
    }
    test -n "$VALGRIND" && vg_check
else
    # This is a non-libtool shell script, just execute it.
    "$@"
fi

if test -z "$ERROR"; then
    # Clean up logs if there was no error.
    rm -f $VG_LOG $TEST_LOG
    exit 0
else
    exit $ERROR
fi