REPOS="$1"
TXN="$2"

export PATH=/bin:/usr/bin

# Make sure that the log message contains some text.
SVNLOOK=//opt/CollabNet_Subversion/bin/svnlook
$SVNLOOK log -t "$TXN" "$REPOS" | \
   grep "[a-zA-Z0-9]" > /dev/null || exit 1

# All checks passed, so allow the commit.
exit 0