use lazyDependency to optimize dependency fetching

Helps hexops/mach#1197 Signed-off-by: Stephen Gutekanst <[email protected]>
emidoots · Apr 21, 2024 · 98b4bca · 98b4bca
1 parent 8f7ca98
commit 98b4bca
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Showing 2 changed files with 17 additions and 11 deletions.
diff --git a/build.zig b/build.zig
@@ -30,24 +30,27 @@ pub fn build(b: *std.Build) void {
 
     lib.installHeadersDirectory("include/GLFW", "GLFW");
     // GLFW headers depend on these headers, so they must be distributed too.
-    const vulkan_headers_dep = b.dependency("vulkan_headers", .{
+    if (b.lazyDependency("vulkan_headers", .{
         .target = target,
         .optimize = optimize,
-    });
-    lib.installLibraryHeaders(vulkan_headers_dep.artifact("vulkan-headers"));
+    })) |dep| {
+        lib.installLibraryHeaders(dep.artifact("vulkan-headers"));
+    }
     if (target.result.os.tag == .linux) {
-        const x11_headers_dep = b.dependency("x11_headers", .{
+        if (b.lazyDependency("x11_headers", .{
             .target = target,
             .optimize = optimize,
-        });
-        const wayland_headers_dep = b.dependency("wayland_headers", .{
+        })) |dep| {
+            lib.linkLibrary(dep.artifact("x11-headers"));
+            lib.installLibraryHeaders(dep.artifact("x11-headers"));
+        }
+        if (b.lazyDependency("wayland_headers", .{
             .target = target,
             .optimize = optimize,
-        });
-        lib.linkLibrary(x11_headers_dep.artifact("x11-headers"));
-        lib.linkLibrary(wayland_headers_dep.artifact("wayland-headers"));
-        lib.installLibraryHeaders(x11_headers_dep.artifact("x11-headers"));
-        lib.installLibraryHeaders(wayland_headers_dep.artifact("wayland-headers"));
+        })) |dep| {
+            lib.linkLibrary(dep.artifact("wayland-headers"));
+            lib.installLibraryHeaders(dep.artifact("wayland-headers"));
+        }
     }
 
     if (target.result.isDarwin()) {

diff --git a/build.zig.zon b/build.zig.zon
@@ -20,14 +20,17 @@
         .vulkan_headers = .{
             .url = "https://pkg.machengine.org/vulkan-headers/e33f2e482893a90bb36d67649ab30d5236ac21ab.tar.gz",
             .hash = "122017098e4ca00dac1a9d30d152a6e6e9522843219c6df4489210fb7c8a6e4c7c1a",
+            .lazy = true,
         },
         .wayland_headers = .{
             .url = "https://pkg.machengine.org/wayland-headers/4926b8c635aa2f215b0d5382060fc4091aa7b705.tar.gz",
             .hash = "12207decf58bee217ae9c5340a6852a62e7f5af9901bef9b1468d93e480798898285",
+            .lazy = true,
         },
         .x11_headers = .{
             .url = "https://pkg.machengine.org/x11-headers/ad1c4891f70302c61ba956cfd565758dc1ca9d28.tar.gz",
             .hash = "1220ce35d8f1556afd5bf4796a7899d459f9c628b989f247eaf6aa00fbad10a88c9f",
+            .lazy = true,
         },
     },
 }