refacto: move some code into actions

(non breaking, old assignments link to new assignments)
- move lib.collapse-all into actions/collapse-all
- move lib.dir-up into actions/dir-up
- move lib.change-dir into actions/change-dir
- use setup option for change-dir global (and use the old option for
  setup)

lua/nvim-tree/actions/change-dir.lua

@@ -0,0 +1,37 @@
+local a = vim.api
+local lib = function() return require'nvim-tree.lib' end
+
+local M = {
+  current_tab = a.nvim_get_current_tabpage(),
+  options = {
+    global = false,
+  }
+}
+
+function M.fn(name)
+  local foldername = name == '..' and vim.fn.fnamemodify(lib().Tree.cwd, ':h') or name
+  local no_cwd_change = vim.fn.expand(foldername) == lib().Tree.cwd
+  local new_tab = a.nvim_get_current_tabpage()
+  local is_window = vim.v.event.scope == "window" and new_tab == M.current_tab
+  if no_cwd_change or is_window then
+    return
+  end
+  M.current_tab = new_tab
+
+  if M.options.global then
+    vim.cmd('cd '..vim.fn.fnameescape(foldername))
+  else
+    vim.cmd('lcd '..vim.fn.fnameescape(foldername))
+  end
+  lib().init(false, foldername)
+end
+
+function M.setup(options)
+  if options.actions.change_dir.global ~= nil then
+    M.options.global = options.actions.change_dir.global
+  else
+    M.options.global = vim.g.nvim_tree_change_dir_global == 1
+  end
+end
+
+return M

lua/nvim-tree/actions/collapse-all.lua

@@ -0,0 +1,19 @@
+local M = {}
+
+function M.fn()
+  local function iter(nodes)
+    for _, node in pairs(nodes) do
+      if node.open then
+        node.open = false
+      end
+      if node.entries then
+        iter(node.entries)
+      end
+    end
+  end
+
+  iter(require'nvim-tree.lib'.Tree.entries)
+  require'nvim-tree.lib'.redraw()
+end
+
+return M

lua/nvim-tree/actions/dir-up.lua

@@ -0,0 +1,13 @@
+local M = {}
+
+function M.fn(node)
+  if not node or node.name == ".." then
+    return require'nvim-tree.actions.change-dir'.fn('..')
+  else
+    local newdir = vim.fn.fnamemodify(require'nvim-tree.lib'.Tree.cwd, ':h')
+    require'nvim-tree.actions.change-dir'.fn(newdir)
+    return require'nvim-tree.lib'.set_index_and_redraw(node.absolute_path)
+  end
+end
+
+return M

lua/nvim-tree/actions/init.lua

@@ -76,7 +76,7 @@ local keypress_funcs = {
   next_sibling = require'nvim-tree.actions.movements'.sibling(1),
   prev_git_item = go_to('prev_git_item'),
   next_git_item = go_to('next_git_item'),
-  dir_up = lib.dir_up,
+  dir_up = require'nvim-tree.actions.dir-up'.fn,
   close = function() require'nvim-tree'.close() end,
   preview = function(node)
     if node.name == '..' then
@@ -106,9 +106,9 @@ function M.on_keypress(action)
   end
 
   if node.name == ".." then
-    return lib.change_dir("..")
+    return require'nvim-tree.actions.change-dir'.fn("..")
   elseif action == "cd" and node.entries ~= nil then
-    return lib.change_dir(lib.get_last_group_node(node).absolute_path)
+    return require'nvim-tree.actions.change-dir'.fn(lib.get_last_group_node(node).absolute_path)
   elseif action == "cd" then
     return
   end