From add37b9c4991d7ce9bdd58bb4f8c66ac8a9c7244 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johan=20Sk=C3=B6ld?= <johan@skold.cc>
Date: Sun, 15 Nov 2015 03:34:04 -0800
Subject: [PATCH] Adds a "Native" option to newline_style.

By using it one will get \r\n line endings on Windows, and \n line endings
on other platforms.
---
 src/config.rs  |  1 +
 src/filemap.rs | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/config.rs b/src/config.rs
index dcf0816335b..713d3aefd3c 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -26,6 +26,7 @@ macro_rules! configuration_option_enum{
 configuration_option_enum! { NewlineStyle:
     Windows, // \r\n
     Unix, // \n
+    Native, // \r\n in Windows, \n on other platforms
 }
 
 configuration_option_enum! { BraceStyle:
diff --git a/src/filemap.rs b/src/filemap.rs
index 3f1a867f385..5b997b55c25 100644
--- a/src/filemap.rs
+++ b/src/filemap.rs
@@ -59,7 +59,17 @@ pub fn write_file(text: &StringBuffer,
                                 -> Result<(), io::Error>
         where T: Write
     {
-        match config.newline_style {
+        let style = if config.newline_style == NewlineStyle::Native {
+            if cfg!(windows) {
+                NewlineStyle::Windows
+            } else {
+                NewlineStyle::Unix
+            }
+        } else {
+            config.newline_style
+        };
+
+        match style {
             NewlineStyle::Unix => write!(writer, "{}", text),
             NewlineStyle::Windows => {
                 for (c, _) in text.chars() {
@@ -71,6 +81,7 @@ pub fn write_file(text: &StringBuffer,
                 }
                 Ok(())
             }
+            NewlineStyle::Native => unreachable!(),
         }
     }