build.zig: add an isPlatform() helper function

floooh · Feb 24, 2025 · a0f7339 · a0f7339
1 parent 6d14eaa
commit a0f7339
Showing 1 changed file with 29 additions and 7 deletions.
diff --git a/build.zig b/build.zig
@@ -12,6 +12,28 @@ pub const SokolBackend = enum {
     wgpu,
 };
 
+pub const TargetPlatform = enum {
+    android,
+    linux,
+    darwin, // macos and ios
+    macos,
+    ios,
+    windows,
+    web,
+};
+
+pub fn isPlatform(target: std.Target, platform: TargetPlatform) bool {
+    return switch (platform) {
+        .android => target.abi.isAndroid(),
+        .linux => target.os.tag == .linux,
+        .darwin => target.os.tag.isDarwin(),
+        .macos => target.os.tag == .macos,
+        .ios => target.os.tag == .ios,
+        .windows => target.os.tag == .windows,
+        .web => target.cpu.arch.isWasm(),
+    };
+}
+
 pub fn build(b: *Build) !void {
     const opt_use_gl = b.option(bool, "gl", "Force OpenGL (default: false)") orelse false;
     const opt_use_gles3 = b.option(bool, "gles3", "Force OpenGL ES3 (default: false)") orelse false;
@@ -94,7 +116,7 @@ const ExampleOptions = struct {
 fn buildExample(b: *Build, comptime name: []const u8, options: ExampleOptions) !void {
     const main_src = "src/examples/" ++ name ++ ".zig";
     var run: ?*Build.Step.Run = null;
-    if (!options.target.result.cpu.arch.isWasm()) {
+    if (!isPlatform(options.target.result, .web)) {
         // for native platforms, build into a regular executable
         const example = b.addExecutable(.{
             .name = name,
@@ -140,13 +162,13 @@ fn buildExample(b: *Build, comptime name: []const u8, options: ExampleOptions) !
 pub fn resolveSokolBackend(backend: SokolBackend, target: std.Target) SokolBackend {
     if (backend != .auto) {
         return backend;
-    } else if (target.os.tag.isDarwin()) {
+    } else if (isPlatform(target, .darwin)) {
         return .metal;
-    } else if (target.os.tag == .windows) {
+    } else if (isPlatform(target, .windows)) {
         return .d3d11;
-    } else if (target.cpu.arch.isWasm()) {
+    } else if (isPlatform(target, .web)) {
         return .gles3;
-    } else if (target.abi.isAndroid()) {
+    } else if (isPlatform(target, .android)) {
         return .gles3;
     } else {
         return .gl;
@@ -194,7 +216,7 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*Build.Step.Compile {
     // sokol is used as package manager dependency via 'dep_sokol.artifact("sokol_clib")'
     b.installArtifact(lib);
 
-    if (options.target.result.cpu.arch.isWasm()) {
+    if (isPlatform(options.target.result, .web)) {
         // make sure we're building for the wasm32-emscripten target, not wasm32-freestanding
         if (lib.rootModuleTarget().os.tag != .emscripten) {
             std.log.err("Please build with 'zig build -Dtarget=wasm32-emscripten", .{});
@@ -500,7 +522,7 @@ fn buildShaders(b: *Build, target: Build.ResolvedTarget) void {
     }
     const shdc_path = sokol_tools_bin_dir ++ optional_shdc.?;
     const shdc_step = b.step("shaders", "Compile shaders (needs ../sokol-tools-bin)");
-    const glsl = if (target.result.os.tag.isDarwin()) "glsl410" else "glsl430";
+    const glsl = if (isPlatform(target.result, .darwin)) "glsl410" else "glsl430";
     const slang = glsl ++ ":metal_macos:hlsl5:glsl300es:wgsl";
     inline for (shaders) |shader| {
         const cmd = b.addSystemCommand(&.{