From de59f0a38d02d2f72523319dfa85d63170c336a5 Mon Sep 17 00:00:00 2001
From: Techatrix <19954306+Techatrix@users.noreply.github.com>
Date: Fri, 5 Jan 2024 17:28:03 +0100
Subject: [PATCH] handle `std.Build.LazyPath.generated_dirname` in build runner

See https://github.com/ziglang/zig/pull/18371
---
 src/build_runner/master.zig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/build_runner/master.zig b/src/build_runner/master.zig
index ae9edff1b..77fafea8c 100644
--- a/src/build_runner/master.zig
+++ b/src/build_runner/master.zig
@@ -390,6 +390,14 @@ const copied_from_zig = struct {
                         return null;
                 }
             },
+            .generated_dirname => |gen| {
+                var dirname = getPath(.{ .generated = gen.generated }, builder) orelse return null;
+                var i: usize = 0;
+                while (i <= gen.up) : (i += 1) {
+                    dirname = std.fs.path.dirname(dirname) orelse return null;
+                }
+                return dirname;
+            },
             .dependency => |dep| return dep.dependency.builder.pathJoin(&[_][]const u8{
                 dep.dependency.builder.build_root.path.?,
                 dep.sub_path,