#! /bin/sh

REPOS="$1"
DUMP="$2"
OWNER="$3"
if [ -z "$REPOS" ] || [ -z "$DUMP" ]; then
    echo "Usage: $0 repository dump-prefix [repository-owner]" >&2
    exit 1
fi

if [ -n "$OWNER" ]; then
    SVNADMIN="sudo -u $OWNER svnadmin"
    SVNLOOK="sudo -u $OWNER svnlook"
else
    SVNADMIN=svnadmin
    SVNLOOK=svnlook
fi

REV=`$SVNLOOK youngest "$REPOS"`
if [ "`expr "$REV" : '[0-9]\+'`" -eq 0 ]; then
    echo "$0: svnlook youngest failed" >&2
    exit 1
fi

$SVNADMIN dump "$REPOS" 0 "$REV" > "$DUMP.$REV"

exit 0