From 1467054baeaa05668129ef491be6ac1b3b82d80d Mon Sep 17 00:00:00 2001
From: fardragon <michaldrozd@protonmail.ch>
Date: Sat, 27 Jun 2026 11:28:21 +0200
Subject: [PATCH] In newline detection handle files that contain newlines, but
 don't end in one

---
 lib/compiler/Maker/Step/ConfigHeader.zig | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/compiler/Maker/Step/ConfigHeader.zig b/lib/compiler/Maker/Step/ConfigHeader.zig
index f0c2d27b371eb4fed9e701d6377b5206ba31773a..e0fde54d54b88297e7033627da8a39d3f895ae6a 100644
--- a/lib/compiler/Maker/Step/ConfigHeader.zig
+++ b/lib/compiler/Maker/Step/ConfigHeader.zig
@@ -163,12 +163,8 @@ fn ensureAllValuesUsed(
 }
 
 fn detectNewline(contents: []const u8) []const u8 {
-    return if (std.mem.endsWith(u8, contents, "\r\n"))
-        "\r\n"
-    else if (std.mem.endsWith(u8, contents, "\n"))
-        "\n"
-    else
-        os_newline;
+    const lf_index = std.mem.findScalar(u8, contents, '\n') orelse return os_newline;
+    return if (lf_index > 0 and contents[lf_index - 1] == '\r') "\r\n" else "\n";
 }
 
 fn renderAutoConfUndef(
-- 
2.54.0