X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/3910a1c4f5cd82cdcee45c0423f3f264e332b2a8..cc75efcbf4a83473ae4aa409476212ceb4b4daf5:/tools/mkdigraphs-vim

diff --git a/tools/mkdigraphs-vim b/tools/mkdigraphs-vim
index a4bdfe8..b9ab426 100755
--- a/tools/mkdigraphs-vim
+++ b/tools/mkdigraphs-vim
@@ -2,6 +2,13 @@
 
 VERSION=1.01
 
+if [ "$#" -ne 0 ]
+then
+	echo "Usage: $0 >digraphs-vim.inc.pl"
+	echo 'Collect digraph data from vim, standard output as Perl hash.'
+	exit 64 # EX_USAGE
+fi
+
 vim -e -c'echo version' -cdigraphs -cq | perl -CSD -nE '
 	if ($. == 1) { # head
 		say "# digraphs list from vim version ", s/\s*\z//r;