refacto: extract functions in explorer

lua/nvim-tree/explorer/explore.lua

@@ -7,22 +7,18 @@ local builders = require'nvim-tree.explorer.node-builders'
 
 local M = {}
 
-function M.explore(node, status)
+local function get_type_from(type_, cwd)
-  local cwd = node.cwd or node.link_to or node.absolute_path
+  return type_ or (uv.fs_stat(cwd) or {}).type
-  local handle = uv.fs_scandir(cwd)
+end
-  if type(handle) == 'string' then
-    api.nvim_err_writeln(handle)
-    return
-  end
 
+local function populate_children(handle, cwd, node, status)
   local node_ignored = node.git_status == '!!'
-
   while true do
     local name, t = uv.fs_scandir_next(handle)
     if not name then break end
 
     local abs = utils.path_join({cwd, name})
-    t = t or (uv.fs_stat(abs) or {}).type
+    t = get_type_from(t, abs)
     if not eutils.should_ignore(abs) and not eutils.should_ignore_git(abs, status.files) then
       if t == 'directory' and uv.fs_access(abs, 'R') then
         table.insert(node.nodes, builders.folder(abs, name, status, node_ignored))
@@ -36,6 +32,23 @@ function M.explore(node, status)
       end
     end
   end
+end
+
+local function get_dir_handle(cwd)
+  local handle = uv.fs_scandir(cwd)
+  if type(handle) == 'string' then
+    api.nvim_err_writeln(handle)
+    return
+  end
+  return handle
+end
+
+function M.explore(node, status)
+  local cwd = node.cwd or node.link_to or node.absolute_path
+  local handle = get_dir_handle(cwd)
+  if not handle then return end
+
+  populate_children(handle, cwd, node, status)
 
   local is_root = node.cwd ~= nil
   local child_folder_only = eutils.has_one_child_folder(node) and node.nodes[1]