Enable to use with wildoptions fuzzy

lua/cmdbuf/handler/lua/variable/buffer.lua

@@ -33,7 +33,7 @@ function M.histories(self)
 
   local prefix_length = #"b:" + 1
   local keys = vim.api.nvim_buf_call(self._bufnr, function()
-    return vim.fn.getcompletion("b:*", "var")
+    return require("cmdbuf.lib.completion").get("b:*", "var")
   end)
   local vars = vim
     .iter(keys)

lua/cmdbuf/handler/lua/variable/global.lua

@@ -27,7 +27,7 @@ function M.histories(_)
   end)
 
   local prefix_length = #"g:" + 1
-  local keys = vim.fn.getcompletion("g:*", "var")
+  local keys = require("cmdbuf.lib.completion").get("g:*", "var")
   local vars = vim
     .iter(keys)
     :map(function(key)

lua/cmdbuf/handler/vim/env.lua

@@ -6,7 +6,7 @@ function M.new()
 end
 
 function M.histories()
-  local keys = vim.fn.getcompletion("*", "environment")
+  local keys = require("cmdbuf.lib.completion").get("*", "environment")
   local lines = {}
   for _, key in ipairs(keys) do
     local value = vim.env[key]

lua/cmdbuf/lib/completion.lua

@@ -0,0 +1,20 @@
+local M = {}
+
+function M.get(pattern, typ)
+  local tmp = vim.opt.wildoptions
+  vim.opt.wildoptions:remove("fuzzy")
+  local restore = function()
+    vim.opt.wildoptions = tmp
+  end
+
+  local ok, result = pcall(vim.fn.getcompletion, pattern, typ)
+  if not ok then
+    restore()
+    error(result)
+  end
+
+  restore()
+  return result
+end
+
+return M