#!/bin/sh -e

LANG="C"; export LANG
LC_CTYPE="C"; export LC_CTYPE
LC_NUMERIC="C"; export LC_NUMERIC
LC_TIME="C"; export LC_TIME
LC_COLLATE="C"; export LC_COLLATE
LC_MONETARY="C"; export LC_MONETARY
LC_MESSAGES="C"; export LC_MESSAGES
LC_PAPER="C"; export LC_PAPER
LC_NAME="C"; export LC_NAME
LC_ADDRESS="C"; export LC_ADDRESS
LC_TELEPHONE="C"; export LC_TELEPHONE
LC_MEASUREMENT="C"; export LC_MEASUREMENT
LC_IDENTIFICATION="C"; export LC_IDENTIFICATION
LC_ALL=""; export LC_ALL
TZ=GMT; export TZ
HGEDITOR=true; export HGEDITOR
HGMERGE=true; export HGMERGE
HGUSER="test"; export HGUSER
HGRCPATH=""; export HGRCPATH

if [ `echo -n HG` = "-n HG" ]
then
    ECHO_N=echo
    NNL="\c"
else
    ECHO_N="echo -n"
    NNL=
fi

umask 022

tests=0
failed=0

HGTMP=""
cleanup_exit() {
    rm -rf "$HGTMP"
}

# Remove temporary files even if we get interrupted
trap "cleanup_exit" 0 # normal exit
trap "exit 255" 1 2 3 6 15 # HUP INT QUIT ABRT TERM

HGTMP="${TMPDIR-/tmp}/hgtests.$RANDOM.$RANDOM.$RANDOM.$$"
(umask 077 && mkdir "$HGTMP") || {
    echo "Could not create temporary directory! Exiting." 1>&2
    exit 1
}

TESTDIR="$PWD"
export TESTDIR
INST="$HGTMP/install"
PYTHONDIR="$INST/lib/python"
cd ..
if ${PYTHON-python} setup.py install --home="$INST" \
  --install-lib="$PYTHONDIR" > tests/install.err 2>&1
then
    rm tests/install.err
else
    cat tests/install.err
    exit 1
fi
cd "$TESTDIR"

BINDIR="$INST/bin"
PATH="$BINDIR:$PATH"; export PATH
if [ -n "$PYTHON" ]; then
    {
        echo "#!/bin/sh"
        echo "exec \"$PYTHON"'" "$@"'
    } > "$BINDIR/python"
    chmod 755 "$BINDIR/python"
fi

PYTHONPATH="$PYTHONDIR"; export PYTHONPATH

run_one() {
    rm -f "$1.err"

    mkdir "$HGTMP/$1"
    cd "$HGTMP/$1"
    fail=0
    HOME="$HGTMP/$1"; export HOME
    OUT="$HGTMP/$1.out"
    OUTOK="$TESTDIR/$1.out"
    ERR="$TESTDIR/$1.err"

    if "$TESTDIR/$1" > "$OUT" 2>&1; then
	: no error
    else
	echo "$1 failed with error code $?"
	fail=1
    fi

    if [ -s "$OUT" -a ! -s "$OUTOK" ] ; then
	cp "$OUT" "$ERR"
	echo
	echo "$1 generated unexpected output:"
	cat "$ERR"
	fail=1
    elif [ -r "$OUTOK" ]; then
	if diff -u "$OUTOK" "$OUT" > /dev/null; then
	    : no differences
	else
	    cp "$OUT" "$ERR"
	    echo
	    echo "$1 output changed:"
	    diff -u "$OUTOK" "$ERR" || true
	    fail=1
	fi
    fi

    cd "$TESTDIR"
    rm -f "$HGTMP/$1.out"
    rm -rf "$HGTMP/$1"
    return $fail
}

# list of prerequisite programs
# stuff from coreutils (cat, rm, etc) are not tested
prereqs="python merge diff grep unzip gunzip bunzip2 sed"
missing=''
for pre in $prereqs ; do
    if type $pre > /dev/null 2>&1 ; then
        : prereq exists
    else
        missing="$pre $missing"
    fi
done

if [ "$missing" != ''  ] ; then
    echo "ERROR: the test suite needs some programs to execute correctly."
    echo "The following programs are missing: "
    for pre in $missing; do
        echo "   $pre"
    done
    exit 1
fi

TESTS="$*"
if [ -z "$TESTS" ] ; then
    TESTS=`ls test-* | grep -v "[.~]"`
fi

for f in $TESTS ; do
    $ECHO_N ".${NNL}"
    run_one $f || failed=`expr $failed + 1`
    tests=`expr $tests + 1`
done

echo
echo "Ran $tests tests, $failed failed."

if [ $failed -gt 0 ] ; then
    exit 1
fi
exit 0