From 61cd6e6ef8c398be898b30de935a2bcaa60067a1 Mon Sep 17 00:00:00 2001
From: Mark Story <mark@mark-story.com>
Date: Mon, 25 Oct 2021 23:21:38 -0400
Subject: [PATCH] feat: add fern extension (#398)

* Add fern extension

Fern[^1] is general purpose tree view that can browse and manipulate
file trees. This extension provides a simple and useful statusline for
fern buffers.

[^1]: https://github.com/lambdalisue/fern.vim

* Reuse nerdtree code for fern

* doc: mention fern in README

Co-authored-by: shadmansaleh <13149513+shadmansaleh@users.noreply.github.com>
---
 README.md                       |  1 +
 doc/lualine.txt                 |  1 +
 lua/lualine/extensions/fern.lua | 11 +++++++++++
 3 files changed, 13 insertions(+)
 create mode 100644 lua/lualine/extensions/fern.lua

diff --git a/README.md b/README.md
index 6962418..053ae8e 100644
--- a/README.md
+++ b/README.md
@@ -605,6 +605,7 @@ extensions = {'quickfix'}
 <summary><b>Available extensions</b></summary>
 
 * chadtree
+* fern
 * fugitive
 * fzf
 * nerdtree
diff --git a/doc/lualine.txt b/doc/lualine.txt
index 3132616..834e951 100644
--- a/doc/lualine.txt
+++ b/doc/lualine.txt
@@ -604,6 +604,7 @@ Available extensions ~
 
 
 - chadtree
+- fern
 - fugitive
 - fzf
 - nerdtree
diff --git a/lua/lualine/extensions/fern.lua b/lua/lualine/extensions/fern.lua
new file mode 100644
index 0000000..39f5e91
--- /dev/null
+++ b/lua/lualine/extensions/fern.lua
@@ -0,0 +1,11 @@
+-- MIT license, see LICENSE for more details.
+-- Extension for fern file explorer.
+local nerdtree = require 'lualine.extensions.nerdtree'
+
+local M = {}
+
+M.sections = vim.deepcopy(nerdtree.sections)
+
+M.filetypes = { 'fern' }
+
+return M