vim-patch:9.0.0081: command line completion of user command may have duplicates (#19529)

Problem:    Command line completion of user command may have duplicates.
            (Dani Dickstein)
Solution:   Skip global user command if an identical buffer-local one is
            defined. (closes vim/vim#10797)
https://github.com/vim/vim/commit/c2842adfb2ca0637f13e2793fefa18e7818684f9

1 files changed, 10 insertions, 1 deletions

diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 0a9285b7fe..6963ede3ae 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -6788,9 +6788,18 @@ char *get_user_commands(expand_T *xp FUNC_ATTR_UNUSED, int idx)
   if (idx < buf->b_ucmds.ga_len) {
     return (char *)USER_CMD_GA(&buf->b_ucmds, idx)->uc_name;
   }
+
   idx -= buf->b_ucmds.ga_len;
   if (idx < ucmds.ga_len) {
-    return (char *)USER_CMD(idx)->uc_name;
+    char *name = (char *)USER_CMD(idx)->uc_name;
+
+    for (int i = 0; i < buf->b_ucmds.ga_len; i++) {
+      if (STRCMP(name, USER_CMD_GA(&buf->b_ucmds, i)->uc_name) == 0) {
+        // global command is overruled by buffer-local one
+        return "";
+      }
+    }
+    return name;
   }
   return NULL;
 }