refacto: remove fs folder and move code to actions

- remove file moved to actions.remove-file.lua
- rename file moved to actions.rename-file.lua

lua/nvim-tree/actions/remove-file.lua

@@ -0,0 +1,79 @@
+local a = vim.api
+local luv = vim.loop
+
+local utils = require'nvim-tree.utils'
+local lib = require'nvim-tree.lib'
+local events = require'nvim-tree.events'
+
+local M = {}
+
+local function clear_buffer(absolute_path)
+  local bufs = vim.fn.getbufinfo({bufloaded = 1, buflisted = 1})
+  for _, buf in pairs(bufs) do
+    if buf.name == absolute_path then
+      if buf.hidden == 0 and #bufs > 1 then
+        local winnr = a.nvim_get_current_win()
+        a.nvim_set_current_win(buf.windows[1])
+        vim.cmd(':bn')
+        a.nvim_set_current_win(winnr)
+      end
+      vim.api.nvim_buf_delete(buf.bufnr, {})
+      if buf.windows[1] then
+        vim.api.nvim_win_close(buf.windows[1], true)
+      end
+      return
+    end
+  end
+end
+
+local function remove_dir(cwd)
+  local handle = luv.fs_scandir(cwd)
+  if type(handle) == 'string' then
+    return a.nvim_err_writeln(handle)
+  end
+
+  while true do
+    local name, t = luv.fs_scandir_next(handle)
+    if not name then break end
+
+    local new_cwd = utils.path_join({cwd, name})
+    if t == 'directory' then
+      local success = remove_dir(new_cwd)
+      if not success then return false end
+    else
+      local success = luv.fs_unlink(new_cwd)
+      if not success then return false end
+      clear_buffer(new_cwd)
+    end
+  end
+
+  return luv.fs_rmdir(cwd)
+end
+
+
+function M.fn(node)
+  if node.name == '..' then return end
+
+  print("Remove " ..node.name.. " ? y/n")
+  local ans = utils.get_user_input_char()
+  utils.clear_prompt()
+  if ans:match('^y') then
+    if node.entries ~= nil and not node.link_to then
+      local success = remove_dir(node.absolute_path)
+      if not success then
+        return a.nvim_err_writeln('Could not remove '..node.name)
+      end
+      events._dispatch_folder_removed(node.absolute_path)
+    else
+      local success = luv.fs_unlink(node.absolute_path)
+      if not success then
+        return a.nvim_err_writeln('Could not remove '..node.name)
+      end
+      events._dispatch_file_removed(node.absolute_path)
+      clear_buffer(node.absolute_path)
+    end
+    lib.refresh_tree()
+  end
+end
+
+return M