core: separate entrypoint from core module

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

libs/core/sdk.zig

@@ -115,11 +115,6 @@ pub fn Sdk(comptime deps: anytype) type {
 
                 var dependencies = std.ArrayList(std.build.ModuleDependency).init(b.allocator);
                 try dependencies.append(.{ .name = "core", .module = module(b) });
-                try dependencies.append(.{ .name = "gpu", .module = deps.gpu.module(b) });
-                switch (platform) {
-                    .native => try dependencies.append(.{ .name = "glfw", .module = deps.glfw.module(b) }),
-                    .web => try dependencies.append(.{ .name = "sysjs", .module = deps.sysjs.module(b) }),
-                }
                 if (options.deps) |app_deps| try dependencies.appendSlice(app_deps);
 
                 const app_module = b.createModule(.{
@@ -137,7 +132,7 @@ pub fn Sdk(comptime deps: anytype) type {
                     } else {
                         const exe = b.addExecutable(.{
                             .name = options.name,
-                            .root_source_file = .{ .path = sdkPath("/src/main.zig") },
+                            .root_source_file = .{ .path = sdkPath("/src/entry.zig") },
                             .target = options.target,
                             .optimize = options.optimize,
                         });
@@ -151,7 +146,7 @@ pub fn Sdk(comptime deps: anytype) type {
                 };
 
                 step.main_pkg_path = sdkPath("/src");
-                step.addModule("gpu", deps.gpu.module(b));
+                step.addModule("core", module(b));
                 step.addModule("app", app_module);
 
                 return .{

libs/core/src/entry.zig

@@ -1,6 +1,9 @@
 const builtin = @import("builtin");
 
-pub usingnamespace @import("platform.zig").entry;
+pub usingnamespace if (builtin.cpu.arch == .wasm32)
+    @import("platform/wasm/entry.zig")
+else
+    @import("platform/native/entry.zig");
 
 comptime {
     if (!builtin.is_test) {

libs/core/src/main.zig

@@ -1,8 +1,9 @@
-pub usingnamespace @import("entry.zig");
 pub const Core = @import("Core.zig");
 pub const Timer = @import("Timer.zig");
 pub const gpu = @import("gpu");
 pub const sysjs = @import("sysjs");
+const builtin = @import("builtin");
+pub const platform_util = if (builtin.cpu.arch == .wasm32) {} else @import("platform/native/util.zig");
 
 test {
     _ = @import("platform/libmachcore.zig");

libs/core/src/platform.zig

@@ -7,7 +7,6 @@ else
 
 // Verifies that a platform implementation exposes the expected function declarations.
 comptime {
-    assertHasDecl(@This(), "entry");
     assertHasDecl(@This(), "Core");
     assertHasDecl(@This(), "Timer");
 

libs/core/src/platform/native.zig

@@ -1,5 +1,4 @@
 const std = @import("std");
 
-pub const entry = @import("native/entry.zig");
 pub const Core = @import("native/Core.zig");
 pub const Timer = std.time.Timer;

libs/core/src/platform/native/entry.zig

@@ -1,7 +1,7 @@
 const std = @import("std");
-const gpu = @import("gpu");
 const App = @import("app").App;
-const util = @import("util.zig");
+const core = @import("core");
+const gpu = core.gpu;
 
 pub const GPUInterface = gpu.dawn.Interface;
 
@@ -28,8 +28,8 @@ pub fn main() !void {
     defer app.deinit();
 
     while (true) {
-        const pool = try util.AutoReleasePool.init();
-        defer util.AutoReleasePool.release(pool);
+        const pool = try core.platform_util.AutoReleasePool.init();
+        defer core.platform_util.AutoReleasePool.release(pool);
         if (try app.update()) return;
     }
 }

libs/core/src/platform/wasm.zig

@@ -1,3 +1,2 @@
 pub const Core = @import("wasm/Core.zig");
 pub const Timer = @import("wasm/Timer.zig");
-pub const entry = @import("wasm/entry.zig");

libs/core/src/platform/wasm/entry.zig

@@ -1,7 +1,11 @@
 const std = @import("std");
-const gpu = @import("gpu");
+const core = @import("core");
+const gpu = core.gpu;
 const App = @import("app").App;
-const js = @import("js.zig");
+
+pub extern "mach" fn machLogWrite(str: [*]const u8, len: u32) void;
+pub extern "mach" fn machLogFlush() void;
+pub extern "mach" fn machPanic(str: [*]const u8, len: u32) void;
 
 pub const GPUInterface = gpu.StubInterface;
 const app_std_options = if (@hasDecl(App, "std_options")) App.std_options else struct {};
@@ -23,7 +27,7 @@ const LogError = error{};
 const LogWriter = std.io.Writer(void, LogError, writeLog);
 
 fn writeLog(_: void, msg: []const u8) LogError!usize {
-    js.machLogWrite(msg.ptr, msg.len);
+    machLogWrite(msg.ptr, msg.len);
     return msg.len;
 }
 
@@ -38,7 +42,7 @@ pub const std_options = struct {
         const writer = LogWriter{ .context = {} };
 
         writer.print(message_level.asText() ++ prefix ++ format ++ "\n", args) catch return;
-        js.machLogFlush();
+        machLogFlush();
     }
 
     pub const log_level = if (@hasDecl(app_std_options, "log_level"))
@@ -55,6 +59,6 @@ pub const std_options = struct {
 pub fn panic(msg: []const u8, error_return_trace: ?*std.builtin.StackTrace, ret_addr: ?usize) noreturn {
     _ = error_return_trace;
     _ = ret_addr;
-    js.machPanic(msg.ptr, msg.len);
+    machPanic(msg.ptr, msg.len);
     unreachable;
 }