1 files changed, 9 insertions, 0 deletions
diff --git a/isort/utils.py b/isort/utils.py
index 1f1b5143..0f6f57bf 100644
--- a/isort/utils.py
+++ b/isort/utils.py
@@ -52,3 +52,12 @@ def difference(a: Iterable[Any], b: Container[Any]) -> List[Any]:
         if item not in b:
             d.append(item)
     return d
+
+
+def infer_line_separator(file_contents: str) -> str:
+    if '\r\n' in file_contents:
+        return '\r\n'
+    elif '\r' in file_contents:
+        return '\r'
+    else:
+        return '\n'