Lines in file are displayed in NERDTree.

CHANGELOG.md

@@ -5,6 +5,7 @@
         - **.PATCH**: Pull Request Title (PR Author) [PR Number](Link to PR)
 -->
 #### 6.10
+- **.17**: Lines in file are displayed in explorer. (hsnks100) [#1328](https://github.com/preservim/nerdtree/pull/1328)
 - **.16**: Fix documentation errors. (lifecrisis) [#1269](https://github.com/preservim/nerdtree/pull/1269)
 - **.15**: Ensure backward compatible testing of types. (lifecrisis) [#1266](https://github.com/preservim/nerdtree/pull/1266)
 - **.14**: Replace trim() with a version-compatible alternative. (PhilRunninger) [#1265](https://github.com/preservim/nerdtree/pull/1265)

README.markdown

@@ -194,6 +194,28 @@ let g:NERDTreeDirArrowCollapsible = '?'
 ```
 The preceding values are the non-Windows default arrow symbols. Setting these variables to empty strings will remove the arrows completely and shift the entire tree two character positions to the left. See `:h NERDTreeDirArrowExpandable` for more details.
 
+### How can I show lines of files?
+
+```vim
+let g:NERDTreeFileLines = 1
+```
+
+Lines in the file are displayed as shown below.
+```
+</pack/packer/start/nerdtree/
+▸ autoload/
+▸ doc/
+▸ lib/
+▸ nerdtree_plugin/
+▸ plugin/
+▸ syntax/
+  _config.yml (1)
+  CHANGELOG.md (307)
+  LICENCE (13)
+  README.markdown (234)
+  screenshot.png (219)
+```
+
 ### Can NERDTree access remote files via scp or ftp?
 
 Short answer: No, and there are no plans to add that functionality. However, Vim ships with a plugin that does just that. It's called netrw, and by adding the following lines to your `.vimrc`, you can use it to open files over the `scp:`, `ftp:`, or other protocols, while still using NERDTree for all local files. The function seamlessly makes the decision to open NERDTree or netrw, and other supported protocols can be added to the regular expression.

lib/nerdtree/path.vim

@@ -65,6 +65,23 @@ function! s:Path.cacheDisplayString() abort
         let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' -> ' . self.symLinkDest
     endif
 
+    if !self.isDirectory && g:NERDTreeFileLines != 0
+        let l:bufname = self.str({'format': 'Edit'})
+        let l:lines = 0
+        if executable('wc') 
+            let l:lines = split(system("wc -l ".l:bufname))[0]
+        else 
+            let s:lines = readfile(l:bufname)
+            let l:lines = 0
+            for s:line in s:lines
+                let l:lines += 1
+                if l:lines >= 20000 
+                    break
+                endif
+            endfor
+        endif
+        let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' ('.l:lines.')'
+    endif
     if self.isReadOnly
         let self.cachedDisplayString = self.addDelimiter(self.cachedDisplayString) . ' ['.g:NERDTreeGlyphReadOnly.']'
     endif

plugin/NERD_tree.vim

@@ -52,6 +52,7 @@ let g:NERDTreeShowFiles             = get(g:, 'NERDTreeShowFiles',             1
 let g:NERDTreeShowHidden            = get(g:, 'NERDTreeShowHidden',            0)
 let g:NERDTreeShowLineNumbers       = get(g:, 'NERDTreeShowLineNumbers',       0)
 let g:NERDTreeSortDirs              = get(g:, 'NERDTreeSortDirs',              1)
+let g:NERDTreeFileLines             = get(g:, 'NERDTreeFileLines',             0)
 
 if !nerdtree#runningWindows() && !nerdtree#runningCygwin()
     let g:NERDTreeDirArrowExpandable  = get(g:, 'NERDTreeDirArrowExpandable',  '▸')
@@ -142,6 +143,7 @@ call nerdtree#loadClassFiles()
 "============================================================
 call nerdtree#ui_glue#setupCommands()
 
+
 " SECTION: Auto commands {{{1
 "============================================================
 augroup NERDTree