refacto: extract create_file into actions module

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

@@ -0,0 +1,110 @@
+local a = vim.api
+local uv = vim.loop
+
+local utils = require'nvim-tree.utils'
+local events = require'nvim-tree.events'
+local lib = require'nvim-tree.lib'
+
+local M = {}
+
+local function focus_file(file)
+  local _, i = utils.find_node(
+    lib.Tree.entries,
+    function(node) return node.absolute_path == file end
+  )
+  require'nvim-tree.view'.set_cursor({i+1, 1})
+end
+
+local function create_file(file)
+  if utils.file_exists(file) then
+    print(file..' already exists. Overwrite? y/n')
+    local ans = utils.get_user_input_char()
+    utils.clear_prompt()
+    if ans ~= "y" then
+      return
+    end
+  end
+  uv.fs_open(file, "w", 420, vim.schedule_wrap(function(err, fd)
+    if err then
+      a.nvim_err_writeln('Couldn\'t create file '..file)
+    else
+      uv.fs_close(fd)
+      events._dispatch_file_created(file)
+      lib.refresh_tree()
+      focus_file(file)
+    end
+  end))
+end
+
+local function get_num_entries(iter)
+  local i = 0
+  for _ in iter do
+    i = i + 1
+  end
+  return i
+end
+
+function M.fn(node)
+  node = lib.get_last_group_node(node)
+  if node.name == '..' then
+    node = {
+      absolute_path = lib.Tree.cwd,
+      entries = lib.Tree.entries,
+      open = true,
+    }
+  end
+
+  local node_is_open = vim.g.nvim_tree_create_in_closed_folder == 1 or node.open
+
+  local add_into
+  if node.entries ~= nil and node_is_open then
+    add_into = utils.path_add_trailing(node.absolute_path)
+  else
+    add_into = node.absolute_path:sub(0, -(#(node.name or '') + 1))
+  end
+
+  local ans = vim.fn.input('Create file ', add_into)
+  utils.clear_prompt()
+  if not ans or #ans == 0 or utils.file_exists(ans) then return end
+
+  -- create a folder for each path element if the folder does not exist
+  -- if the answer ends with a /, create a file for the last entry
+  local is_last_path_file = not ans:match(utils.path_separator..'$')
+  local path_to_create = ''
+  local idx = 0
+
+  local num_entries = get_num_entries(utils.path_split(utils.path_remove_trailing(ans)))
+  local is_error = false
+  for path in utils.path_split(ans) do
+    idx = idx + 1
+    local p = utils.path_remove_trailing(path)
+    if #path_to_create == 0 and vim.fn.has('win32') == 1 then
+      path_to_create = utils.path_join({p, path_to_create})
+    else
+      path_to_create = utils.path_join({path_to_create, p})
+    end
+    if is_last_path_file and idx == num_entries then
+      create_file(path_to_create)
+    elseif not utils.file_exists(path_to_create) then
+      local success = uv.fs_mkdir(path_to_create, 493)
+      if not success then
+        a.nvim_err_writeln('Could not create folder '..path_to_create)
+        is_error = true
+        break
+      end
+    end
+  end
+  if not is_error then
+    a.nvim_out_write(ans..' was properly created\n')
+  end
+  events._dispatch_folder_created(ans)
+  lib.refresh_tree()
+  focus_file(ans)
+end
+
+
+function M.setup(opts)
+  print(opts)
+end
+
+return M