From 467ae8ef6f26f74431e131441529bcd6d567df63 Mon Sep 17 00:00:00 2001
From: delphinus <delphinus@remora.cx>
Date: Wed, 23 Dec 2015 08:02:26 +0900
Subject: [PATCH 1/2] Detect Darwin with lighter method

---
 plugin/webdevicons.vim | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/plugin/webdevicons.vim b/plugin/webdevicons.vim
index 3aef14d..19b00e2 100644
--- a/plugin/webdevicons.vim
+++ b/plugin/webdevicons.vim
@@ -4,7 +4,6 @@
 " License: see LICENSE
 
 let s:version = '0.7.1'
-let s:operatingsystem = system("uname -s")
 
 " standard fix/safety: line continuation (avoiding side effects) {{{1
 "========================================================================
@@ -137,6 +136,36 @@ endif
 " local functions {{{2
 "========================================================================
 
+" scope: local
+function s:isDarwin()
+  if exists('s:is_darwin')
+    return s:is_darwin
+  endif
+
+  if exists('g:WebDevIconsOS')
+    let s:is_darwin = g:WebDevIconsOS ==? 'Darwin'
+    return s:is_darwin
+  endif
+
+  if has('macunix')
+    let s:is_darwin = 1
+    return s:is_darwin
+  endif
+
+  if ! has('unix')
+    let s:is_darwin = 0
+    return s:is_darwin
+  endif
+
+  if system('uname -s') ==# "Darwin\n"
+    let s:is_darwin = 1
+  else
+    let s:is_darwin = 0
+  endif
+
+  return s:is_darwin
+endfunction
+
 " scope: local
 function! s:strip(input)
   return substitute(a:input, '^\s*\(.\{-}\)\s*$', '\1', '')
@@ -534,7 +563,7 @@ function! WebDevIconsGetFileFormatSymbol(...)
   if &fileformat == "dos"
     let fileformat = ""
   elseif &fileformat == "unix"
-    if s:operatingsystem == "Darwin\n"
+    if s:isDarwin()
       let fileformat = ""
     else
       let fileformat = ""

From 46a928bf3ccb4e1523b9d1d607f026638c2eb717 Mon Sep 17 00:00:00 2001
From: delphinus <delphinus@remora.cx>
Date: Mon, 8 Feb 2016 08:43:05 +0900
Subject: [PATCH 2/2] Add readme for `g:WebDevIconsOS`

---
 readme.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/readme.md b/readme.md
index 840e4f2..3ecb459 100644
--- a/readme.md
+++ b/readme.md
@@ -413,6 +413,12 @@ let g:WebDevIconsUnicodeDecorateFileNodesExtensionSymbols = {} " needed
 let g:WebDevIconsUnicodeDecorateFileNodesExtensionSymbols['myext'] = 'ƛ'
   ```
 
+* specify OS to decide an icon for unix fileformat (_not_ defined by default)
+  - this is useful for avoiding unnecessary `system()` call. you might see [#135](https://github.com/ryanoasis/vim-devicons/pull/135) to know logic further.
+ ```vim
+let g:WebDevIconsOS = 'Darwin'
+  ```
+
 ## Lightline Setup
 
 To add the appropriate icon to [lightline](https://github.com/itchyny/lightline.vim), call the function `WebDevIconsGetFileTypeSymbol()` and/or `WebDevIconsGetFileFormatSymbol()` in your `.vimrc`. For example, you could set your sections to: