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build.zig
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build.zig
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const std = @import("std");
const LDtkImport = @import("tools/LDtkImport.zig");
pub fn build(b: *std.build.Builder) !void {
const optimize = b.standardOptimizeOption(.{});
const assets = b.addModule("assets", .{
.source_file = .{ .path = "assets/assets.zig" },
});
const ldtk = LDtkImport.create(b, .{
.source_path = .{ .path = "assets/maps/wired.ldtk" },
.output_name = "mapldtk",
});
const data_step = b.addOptions();
data_step.addOptionFileSource("path", .{ .generated = &ldtk.world_data });
const world_data = data_step.createModule();
const lib = b.addSharedLibrary(.{
.name = "cart",
.root_source_file = .{ .path = "src/main.zig" },
.optimize = optimize,
.target = .{ .cpu_arch = .wasm32, .os_tag = .freestanding },
});
lib.step.dependOn(&data_step.step);
lib.addModule("world_data", world_data);
lib.addModule("assets", assets);
lib.import_memory = true;
lib.initial_memory = 65536;
lib.max_memory = 65536;
lib.stack_size = 24752;
// Workaround https://github.com/ziglang/zig/issues/2910, preventing
// functions from compiler_rt getting incorrectly marked as exported, which
// prevents them from being removed even if unused.
lib.export_symbol_names = &[_][]const u8{ "start", "update" };
b.installArtifact(lib);
const prefix = b.getInstallPath(.lib, "");
const opt = b.addSystemCommand(&[_][]const u8{
"wasm-opt",
"-Oz",
"--strip-debug",
"--strip-producers",
"--zero-filled-memory",
});
opt.addArtifactArg(lib);
const optout = try std.fs.path.join(b.allocator, &.{ prefix, "opt.wasm" });
defer b.allocator.free(optout);
opt.addArgs(&.{ "--output", optout });
const opt_step = b.step("opt", "Run wasm-opt on cart.wasm, producing opt.wasm");
opt_step.dependOn(&lib.step);
opt_step.dependOn(&opt.step);
}