vis-lua: add vis.VERSION property

It is a string in `git describe` format, as reporte by `vis -v`.

2 files changed, 4 insertions, 0 deletions

diff --git a/README.md b/README.md
index a27c982..d8dc1b4 100644
--- a/README.md
+++ b/README.md
@@ -577,6 +577,7 @@ simple short lived (configuration) tasks.
 At this time there exists no API stability guarantees.
 
  - `vis`
+   - `VERSION` version information string in `git describe` format, same as reported by `vis -v`
    - `MODE_NORMAL`, `MODE_OPERATOR_PENDING`, `MODE_INSERT`, `MODE_REPLACE`, `MODE_VISUAL`, `MODE_VISUAL_LINE` mode constants
    - `mode` current mode (one of the above constants)
    - `lexers` LPeg lexer support module
diff --git a/vis-lua.c b/vis-lua.c
index ad017b1..ee474e1 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -1198,6 +1198,9 @@ void vis_lua_init(Vis *vis) {
 	luaL_newmetatable(L, "vis");
 	luaL_setfuncs(L, vis_lua, 0);
 
+	lua_pushstring(L, VERSION);
+	lua_setfield(L, -2, "VERSION");
+
 	static const struct {
 		enum VisMode id;
 		const char *name;