chore/remove globals (#1279)

* remove renderer globals: nvim_tree_add_trailing nvim_tree_highlight_opened_files nvim_tree_root_folder_modifier nvim_tree_special_files

* remove renderer globals: nvim_tree_icon_padding

* remove renderer globals: nvim_tree_symlink_arrow

* remove renderer globals: nvim_tree_show_icons, nvim_tree_show_icons

* remove renderer globals: nvim_tree_git_hl

* remove renderer globals: nvim_tree_group_empty

* remove renderer globals: respect_buf_cwd

* remove renderer globals: nvim_tree_create_in_closed_folder

* remove globals: consistency in legacy checks

* remove renderer globals: nvim_tree_special_files

* renderer.icons.symbols -> glyphs

Author: alex-courtis

README.md

@@ -32,60 +32,11 @@ use {
 
 ## Setup
 
-Options are currently being migrated into the setup function, you need to run `require'nvim-tree'.setup()` in your personal configurations.
 Setup should be run in a lua file or in a lua heredoc (`:help lua-heredoc`) if using in a vim file.
-Note that options under the `g:` command should be set **BEFORE** running the setup function.
-These are being migrated to the setup function incrementally, check [this issue](https://github.com/kyazdani42/nvim-tree.lua/issues/674) if you encounter any problems related to configs not working after update.
+Legacy `g:` options have been migrated to the setup function. See [this issue](https://github.com/kyazdani42/nvim-tree.lua/issues/674) for information on migrating your configuration.
+
 ```vim
 " vimrc
-let g:nvim_tree_git_hl = 1 "0 by default, will enable file highlight for git attributes (can be used without the icons).
-let g:nvim_tree_highlight_opened_files = 1 "0 by default, will enable folder and file icon highlight for opened files/directories.
-let g:nvim_tree_root_folder_modifier = ':~' "This is the default. See :help filename-modifiers for more options
-let g:nvim_tree_add_trailing = 1 "0 by default, append a trailing slash to folder names
-let g:nvim_tree_group_empty = 1 " 0 by default, compact folders that only contain a single folder into one node in the file tree
-let g:nvim_tree_icon_padding = ' ' "one space by default, used for rendering the space between the icon and the filename. Use with caution, it could break rendering if you set an empty string depending on your font.
-let g:nvim_tree_symlink_arrow = ' >> ' " defaults to ' ➛ '. used as a separator between symlinks' source and target.
-let g:nvim_tree_respect_buf_cwd = 1 "0 by default, will change cwd of nvim-tree to that of new buffer's when opening nvim-tree.
-let g:nvim_tree_create_in_closed_folder = 1 "0 by default, When creating files, sets the path of a file when cursor is on a closed folder to the parent folder when 0, and inside the folder when 1.
-let g:nvim_tree_special_files = { 'README.md': 1, 'Makefile': 1, 'MAKEFILE': 1 } " List of filenames that gets highlighted with NvimTreeSpecialFile
-let g:nvim_tree_show_icons = {
-    \ 'git': 1,
-    \ 'folders': 0,
-    \ 'files': 0,
-    \ 'folder_arrows': 0,
-    \ }
-"If 0, do not show the icons for one of 'git' 'folder' and 'files'
-"1 by default, notice that if 'files' is 1, it will only display
-"if nvim-web-devicons is installed and on your runtimepath.
-"if folder is 1, you can also tell folder_arrows 1 to show small arrows next to the folder icons.
-"but this will not work when you set renderer.indent_markers.enable (because of UI conflict)
-
-" default will show icon by default if no icon is provided
-" default shows no icon by default
-let g:nvim_tree_icons = {
-    \ 'default': "",
-    \ 'symlink': "",
-    \ 'git': {
-    \   'unstaged': "✗",
-    \   'staged': "✓",
-    \   'unmerged': "",
-    \   'renamed': "➜",
-    \   'untracked': "★",
-    \   'deleted': "",
-    \   'ignored': "◌"
-    \   },
-    \ 'folder': {
-    \   'arrow_open': "",
-    \   'arrow_closed': "",
-    \   'default': "",
-    \   'open': "",
-    \   'empty': "",
-    \   'empty_open': "",
-    \   'symlink': "",
-    \   'symlink_open': "",
-    \   }
-    \ }
-
 nnoremap <C-n> :NvimTreeToggle<CR>
 nnoremap <leader>r :NvimTreeRefresh<CR>
 nnoremap <leader>n :NvimTreeFindFile<CR>
@@ -118,6 +69,7 @@ require'nvim-tree'.setup {
 -- nested options are documented by accessing them with `.` (eg: `:help nvim-tree.view.mappings.list`).
 require'nvim-tree'.setup { -- BEGIN_DEFAULT_OPTS
   auto_reload_on_write = true,
+  create_in_closed_folder = false,
   disable_netrw = false,
   hijack_cursor = false,
   hijack_netrw = true,
@@ -129,6 +81,7 @@ require'nvim-tree'.setup { -- BEGIN_DEFAULT_OPTS
   sort_by = "name",
   update_cwd = false,
   reload_on_bufenter = false,
+  respect_buf_cwd = false,
   view = {
     width = 30,
     height = 30,
@@ -146,6 +99,11 @@ require'nvim-tree'.setup { -- BEGIN_DEFAULT_OPTS
     },
   },
   renderer = {
+    add_trailing = false,
+    group_empty = false,
+    highlight_git = false,
+    highlight_opened_files = "none",
+    root_folder_modifier = ":~",
     indent_markers = {
       enable = false,
       icons = {
@@ -157,7 +115,39 @@ require'nvim-tree'.setup { -- BEGIN_DEFAULT_OPTS
     icons = {
       webdev_colors = true,
       git_placement = "before",
+      padding = " ",
+      symlink_arrow = " ➛ ",
+      show = {
+        file = true,
+        folder = true,
+        folder_arrow = true,
+        git = true,
+      },
+      glyphs = {
+        default = "",
+        symlink = "",
+        folder = {
+          arrow_closed = "",
+          arrow_open = "",
+          default = "",
+          open = "",
+          empty = "",
+          empty_open = "",
+          symlink = "",
+          symlink_open = "",
+        },
+        git = {
+          unstaged = "✗",
+          staged = "✓",
+          unmerged = "",
+          renamed = "➜",
+          untracked = "★",
+          deleted = "",
+          ignored = "◌",
+        },
+      },
     },
+    special_files = { "Cargo.toml", "Makefile", "README.md", "readme.md" },
   },
   hijack_directories = {
     enable = true,