Give kazukazuinaina proper credit.

[add] How to install using dein.vim

CHANGELOG.md

@@ -1,13 +1,16 @@
 # NERDTree Change Log
-
-<!--
-    Introduce a new MAJOR.MINOR version with a 4-hash header.
-
-    PATCH versions are listed from newest to oldest under their respective MAJOR.MINOR version
-    in an unordered list.  The format is:
+<!-- Introduce a new MAJOR or MINOR version with a 4-hash header.
+     PATCH versions are listed from newest to oldest under their respective MAJOR.MINOR
+     version in an unordered list.  The format is:
         - **.PATCH**: Pull Request Title (PR Author) [PR Number](Link to PR)
 -->
+#### 6.6
+- **.1**: [add] How to install using dein.vim (kazukazuinaina) [#1087](https://github.com/preservim/nerdtree/pull/1087)
+- **.0**: Add the ability to turn off directory arrows (PhilRunninger) [#1085](https://github.com/preservim/nerdtree/pull/1085)
+#### 6.5
+- **.0**: `NERDTreeToggle <start-directory>` always sets NERDTree root. (PhilRunninger) [#1083](https://github.com/preservim/nerdtree/pull/1083)
 #### 6.4
+- **.6**: NERDTreeFind shows expected message if file doesn't exist e.g. with vim-startify (andys8). [#1081](https://github.com/preservim/nerdtree/pull/1081)
 - **.5**: Ensure events are (or aren't) being ignored correctly. (PhilRunninger) [#1080](https://github.com/preservim/nerdtree/pull/1080)
 - **.4**: Prevent overwriting existing files/dirs on node move. (PhilRunninger) [#1079](https://github.com/preservim/nerdtree/pull/1079)
 - **.3**: Fix regex that finds keyword for minimal menu. (PhilRunninger) [#1075](https://github.com/preservim/nerdtree/pull/1075)

README.markdown

@@ -59,6 +59,13 @@ Plug 'preservim/nerdtree'
 call plug#end()
 ```
 
+#### [dein.vim](https://github.com/Shougo/dein.vim)
+```vim
+call dein#begin()
+call dein#add('preservim/nerdtree')
+call dein#end()
+```
+
 #### [apt-vim](https://github.com/egalpin/apt-vim)
 ```bash
 apt-vim install -y https://github.com/preservim/nerdtree.git
@@ -143,3 +150,8 @@ Use these variables in your vimrc. Note that below are default arrow symbols
 let g:NERDTreeDirArrowExpandable = '▸'
 let g:NERDTreeDirArrowCollapsible = '▾'
 ```
+You can remove the arrows altogether by setting these variables to empty strings, as shown below. This will remove not only the arrows, but a single space following them, shifting the whole tree two character positions to the left.
+```vim
+let g:NERDTreeDirArrowExpandable = ''
+let g:NERDTreeDirArrowCollapsible = ''
+```

autoload/nerdtree/ui_glue.vim

@@ -284,15 +284,16 @@ endfunction
 " FUNCTION: s:findAndRevealPath(pathStr) {{{1
 function! s:findAndRevealPath(pathStr) abort
     let l:pathStr = !empty(a:pathStr) ? a:pathStr : expand('%:p')
-    if !filereadable(l:pathStr)
-        let l:pathStr = fnamemodify(l:pathStr, ':h')
-    endif
 
     if empty(l:pathStr)
         call nerdtree#echoWarning('no file for the current buffer')
         return
     endif
 
+    if !filereadable(l:pathStr)
+        let l:pathStr = fnamemodify(l:pathStr, ':h')
+    endif
+
     try
         let l:pathStr = g:NERDTreePath.Resolve(l:pathStr)
         let l:pathObj = g:NERDTreePath.New(l:pathStr)

doc/NERDTree.txt

@@ -122,8 +122,9 @@ The following features and functionality are provided by the NERDTree:
 
 :NERDTreeToggle [<start-directory> | <bookmark>]               *:NERDTreeToggle*
     If a NERDTree already exists for this tab, it is reopened and rendered
-    again.  If no NERDTree exists for this tab then this command acts the
-    same as the |:NERDTree| command.
+    again. If <start-directory> or <bookmark> is given, the root of NERDTree
+    is set to that path. If no NERDTree exists for this tab then this command
+    acts the same as the |:NERDTree| command.
 
 :NERDTreeToggleVCS [<start-directory> | <bookmark>]            *:NERDTreeToggleVCS*
     Like |:NERDTreeToggle|, but searches up the directory tree to find the top of
@@ -1222,13 +1223,19 @@ Values: Any single character.
 Defaults:   Windows: ~ and +    Others: ▾ and ▸
 
 These characters indicate whether a directory is collapsible or expandable.
-
-They can be set to "\u00a0" to hide the arrows, but if you do this you may
-need to change the node delimiter. See |NERDTreeNodeDelimiter|. You cannot use
-the same character for both the arrows and the delimiter. Example: >
+Example: >
     let NERDTreeDirArrowExpandable=">"
     let NERDTreeDirArrowCollapsible="v"
 <
+They can be set to "\u00a0" to replace the arrows with a non-breaking space.
+If you do this you may need to change the node delimiter. See
+|NERDTreeNodeDelimiter|. You cannot use the same character for both the arrows
+and the delimiter.
+
+Alternatively, they can be set to '' (an empty string). This removes the
+arrows and the single space that follows them, shifting the entire tree two
+character positions to the left.
+
 ------------------------------------------------------------------------------
                                                          *NERDTreeNodeDelimiter*
 Values: Any single character.

lib/nerdtree/creator.vim

@@ -355,17 +355,20 @@ function! s:Creator.ToggleTabTree(dir)
 endfunction
 
 " FUNCTION: s:Creator.toggleTabTree(dir) {{{1
-" Toggles the NERD tree. I.e the NERD tree is open, it is closed, if it is
-" closed it is restored or initialized (if it doesnt exist)
+" Toggles the NERD tree. I.e if the NERD tree is open, it is closed. If it is
+" closed, it is restored or initialized. If dir is not empty, it will be set
+" as the new root.
 "
 " Args:
-" dir: the full path for the root node (is only used if the NERD tree is being
-" initialized.
+" dir: the full path for the root node (is used if the NERD tree is being
+" initialized, or to change the root to a new dir.)
 function! s:Creator.toggleTabTree(dir)
     if g:NERDTree.ExistsForTab()
         if !g:NERDTree.IsOpen()
             call self._createTreeWin()
-            if !&hidden
+            if !empty(a:dir)
+                call self.createTabTree(a:dir)
+            elseif !&hidden
                 call b:NERDTree.render()
             endif
             call b:NERDTree.ui.restoreScreenState()

lib/nerdtree/tree_dir_node.vim

@@ -104,16 +104,11 @@ function! s:TreeDirNode.displayString()
     endfor
 
     " Select the appropriate open/closed status indicator symbol.
-    if l:cascade[-1].isOpen
-        let l:symbol = g:NERDTreeDirArrowCollapsible
-    else
-        let l:symbol = g:NERDTreeDirArrowExpandable
-    endif
-
+    let l:symbol = (l:cascade[-1].isOpen ? g:NERDTreeDirArrowCollapsible : g:NERDTreeDirArrowExpandable )
+    let l:symbol .= (g:NERDTreeDirArrowExpandable ==# '' ? '' : ' ')
     let l:flags = l:cascade[-1].path.flagSet.renderToString()
 
-    let l:result = l:symbol . ' ' . l:flags . l:label
-    return l:result
+    return l:symbol . l:flags . l:label
 endfunction
 
 " FUNCTION: TreeDirNode.findNode(path) {{{1

lib/nerdtree/tree_file_node.vim

@@ -321,13 +321,9 @@ function! s:TreeFileNode._renderToString(depth, drawText)
     if a:drawText ==# 1
 
         let treeParts = repeat('  ', a:depth - 1)
-
-        if !self.path.isDirectory
-            let treeParts = treeParts . '  '
-        endif
+        let treeParts .= (self.path.isDirectory || g:NERDTreeDirArrowExpandable ==# '' ? '' : '  ')
 
         let line = treeParts . self.displayString()
-
         let output = output . line . "\n"
     endif
 

lib/nerdtree/ui.vim

@@ -284,7 +284,11 @@ endfunction
 function! s:UI._indentLevelFor(line)
     " Replace multi-character DirArrows with a single space so the
     " indentation calculation doesn't get messed up.
-    let l:line = substitute(substitute(a:line, '\V'.g:NERDTreeDirArrowExpandable, ' ', ''), '\V'.g:NERDTreeDirArrowCollapsible, ' ', '')
+    if g:NERDTreeDirArrowExpandable ==# ''
+        let l:line = '  '.a:line
+    else
+        let l:line = substitute(substitute(a:line, '\V'.g:NERDTreeDirArrowExpandable, ' ', ''), '\V'.g:NERDTreeDirArrowCollapsible, ' ', '')
+    endif
     let leadChars = match(l:line, '\M\[^ ]')
     return leadChars / s:UI.IndentWid()
 endfunction

syntax/nerdtree.vim

@@ -19,24 +19,7 @@ syn match NERDTreeLinkTarget #->.*# containedin=NERDTreeDir,NERDTreeFile
 syn match NERDTreeLinkFile #.* ->#me=e-3 containedin=NERDTreeFile
 syn match NERDTreeLinkDir #.*/ ->#me=e-3 containedin=NERDTreeDir
 
-"highlighing for directory nodes and file nodes
-syn match NERDTreeDirSlash #/# containedin=NERDTreeDir
-
-exec 'syn match NERDTreeClosable #' . escape(g:NERDTreeDirArrowCollapsible, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
-exec 'syn match NERDTreeOpenable #' . escape(g:NERDTreeDirArrowExpandable, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
-
-let s:dirArrows = escape(g:NERDTreeDirArrowCollapsible, '~]\-').escape(g:NERDTreeDirArrowExpandable, '~]\-')
-exec 'syn match NERDTreeDir #[^'.s:dirArrows.' ].*/#'
-syn match NERDTreeExecFile  '^ .*\*\($\| \)' contains=NERDTreeRO,NERDTreeBookmark
-exec 'syn match NERDTreeFile  #^[^"\.'.s:dirArrows.'] *[^'.s:dirArrows.']*# contains=NERDTreeLink,NERDTreeRO,NERDTreeBookmark,NERDTreeExecFile'
-
-"highlighting for readonly files
-exec 'syn match NERDTreeRO # *\zs.*\ze \['.g:NERDTreeGlyphReadOnly.'\]# contains=NERDTreeIgnore,NERDTreeBookmark,NERDTreeFile'
-
-syn match NERDTreeFlags #^ *\zs\[[^\]]*\]# containedin=NERDTreeFile,NERDTreeExecFile
-syn match NERDTreeFlags #\[[^\]]*\]# containedin=NERDTreeDir
-
-"highlighing to conceal the delimiter around the file/dir name
+"highlighting to conceal the delimiter around the file/dir name
 if has('conceal')
     exec 'syn match NERDTreeNodeDelimiters #\%d' . char2nr(g:NERDTreeNodeDelimiter) . '# conceal containedin=ALL'
     setlocal conceallevel=3 concealcursor=nvic
@@ -45,6 +28,27 @@ else
     hi! link NERDTreeNodeDelimiters Ignore
 endif
 
+"highlighing for directory nodes and file nodes
+syn match NERDTreeDirSlash #/# containedin=NERDTreeDir
+
+if g:NERDTreeDirArrowExpandable !=# ''
+    exec 'syn match NERDTreeClosable #' . escape(g:NERDTreeDirArrowCollapsible, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
+    exec 'syn match NERDTreeOpenable #' . escape(g:NERDTreeDirArrowExpandable, '~') . '\ze .*/# containedin=NERDTreeDir,NERDTreeFile'
+    let s:dirArrows = escape(g:NERDTreeDirArrowCollapsible, '~]\-').escape(g:NERDTreeDirArrowExpandable, '~]\-')
+    exec 'syn match NERDTreeDir #[^'.s:dirArrows.' ].*/#'
+    exec 'syn match NERDTreeExecFile #^.*'.g:NERDTreeNodeDelimiter.'\*\($\| \)# contains=NERDTreeRO,NERDTreeBookmark'
+    exec 'syn match NERDTreeFile  #^[^"\.'.s:dirArrows.'] *[^'.s:dirArrows.']*# contains=NERDTreeLink,NERDTreeRO,NERDTreeBookmark,NERDTreeExecFile'
+else
+    exec 'syn match NERDTreeDir #[^'.g:NERDTreeNodeDelimiter.']\{-}/\ze\($\|'.g:NERDTreeNodeDelimiter.'\)#'
+    exec 'syn match NERDTreeExecFile #[^'.g:NERDTreeNodeDelimiter.']\{-}'.g:NERDTreeNodeDelimiter.'\*\($\| \)# contains=NERDTreeRO,NERDTreeBookmark'
+    exec 'syn match NERDTreeFile     #^.*'.g:NERDTreeNodeDelimiter.'.*[^\/]\($\|'.g:NERDTreeNodeDelimiter.'.*\)# contains=NERDTreeLink,NERDTreeRO,NERDTreeBookmark,NERDTreeExecFile'
+endif
+
+"highlighting for readonly files
+exec 'syn match NERDTreeRO #.*'.g:NERDTreeNodeDelimiter.'\zs.*\ze'.g:NERDTreeNodeDelimiter.'.*\['.g:NERDTreeGlyphReadOnly.'\]# contains=NERDTreeIgnore,NERDTreeBookmark,NERDTreeFile'
+
+exec 'syn match NERDTreeFlags #\[[^\]]*\]\ze'.g:NERDTreeNodeDelimiter.'# containedin=NERDTreeFile,NERDTreeExecFile,NERDTreeDir'
+
 syn match NERDTreeCWD #^[</].*$#
 
 "highlighting for bookmarks