From 8510f9e2bc1c1da6b3d12a07ae613cb3ca888d63 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 7 Mar 2023 00:38:59 -0700
Subject: [PATCH] std.Build: add addAnonymousDependency

This is for bypassing the package manager and directly depending on
another package via the build system. For this to work the anonymous
package must be found on the file system relative to the current
package's build.zig.
---
 lib/std/Build.zig | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/std/Build.zig b/lib/std/Build.zig
index 68e80435f8..c091079b38 100644
--- a/lib/std/Build.zig
+++ b/lib/std/Build.zig
@@ -1457,7 +1457,26 @@ pub fn dependency(b: *Build, name: []const u8, args: anytype) *Dependency {
     process.exit(1);
 }
 
-fn dependencyInner(
+pub fn anonymousDependency(
+    b: *Build,
+    /// The path to the directory containing the dependency's build.zig file,
+    /// relative to the current package's build.zig.
+    relative_build_root: []const u8,
+    /// A direct `@import` of the build.zig of the dependency.
+    comptime build_zig: type,
+    args: anytype,
+) *Dependency {
+    const arena = b.allocator;
+    const build_root = b.build_root.join(arena, &.{relative_build_root}) catch @panic("OOM");
+    const name = arena.dupe(u8, relative_build_root) catch @panic("OOM");
+    for (name) |*byte| switch (byte.*) {
+        '/', '\\' => byte.* = '.',
+        else => continue,
+    };
+    return dependencyInner(b, name, build_root, build_zig, args);
+}
+
+pub fn dependencyInner(
     b: *Build,
     name: []const u8,
     build_root_string: []const u8,