seam-carving/build.zig

// const std = @import("std");
//
// // Although this function looks imperative, note that its job is to
// // declaratively construct a build graph that will be executed by an external
// // runner.
// pub fn build(b: *std.Build) void {
//     // Standard target options allows the person running `zig build` to choose
//     // what target to build for. Here we do not override the defaults, which
//     // means any target is allowed, and the default is native. Other options
//     // for restricting supported target set are available.
//     const target = b.standardTargetOptions(.{});
//
//     // Standard optimization options allow the person running `zig build` to select
//     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
//     // set a preferred release mode, allowing the user to decide how to optimize.
//     const optimize = b.standardOptimizeOption(.{});
//
//     const lib = b.addStaticLibrary(.{
//         .name = "seam-carving",
//         // In this case the main source file is merely a path, however, in more
//         // complicated build scripts, this could be a generated file.
//         .root_source_file = b.path("src/root.zig"),
//         .target = target,
//         .optimize = optimize,
//     });
//
//     // This declares intent for the library to be installed into the standard
//     // location when the user invokes the "install" step (the default step when
//     // running `zig build`).
//     b.installArtifact(lib);
//
//     const exe = b.addExecutable(.{
//         .name = "seam-carving",
//         .root_source_file = b.path("src/main.zig"),
//         .target = target,
//         .optimize = optimize,
//     });
//
//     // This declares intent for the executable to be installed into the
//     // standard location when the user invokes the "install" step (the default
//     // step when running `zig build`).
//     b.installArtifact(exe);
//
//     // This *creates* a Run step in the build graph, to be executed when another
//     // step is evaluated that depends on it. The next line below will establish
//     // such a dependency.
//     const run_cmd = b.addRunArtifact(exe);
//
//     // By making the run step depend on the install step, it will be run from the
//     // installation directory rather than directly from within the cache directory.
//     // This is not necessary, however, if the application depends on other installed
//     // files, this ensures they will be present and in the expected location.
//     run_cmd.step.dependOn(b.getInstallStep());
//
//     // This allows the user to pass arguments to the application in the build
//     // command itself, like this: `zig build run -- arg1 arg2 etc`
//     if (b.args) |args| {
//         run_cmd.addArgs(args);
//     }
//
//     // This creates a build step. It will be visible in the `zig build --help` menu,
//     // and can be selected like this: `zig build run`
//     // This will evaluate the `run` step rather than the default, which is "install".
//     const run_step = b.step("run", "Run the app");
//     run_step.dependOn(&run_cmd.step);
//
//     // Creates a step for unit testing. This only builds the test executable
//     // but does not run it.
//     const lib_unit_tests = b.addTest(.{
//         .root_source_file = b.path("src/root.zig"),
//         .target = target,
//         .optimize = optimize,
//     });
//
//     const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
//
//     const exe_unit_tests = b.addTest(.{
//         .root_source_file = b.path("src/main.zig"),
//         .target = target,
//         .optimize = optimize,
//     });
//
//     const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
//
//     // Similar to creating the run step earlier, this exposes a `test` step to
//     // the `zig build --help` menu, providing a way for the user to request
//     // running the unit tests.
//     const test_step = b.step("test", "Run unit tests");
//     test_step.dependOn(&run_lib_unit_tests.step);
//     test_step.dependOn(&run_exe_unit_tests.step);
// }

const std = @import("std");
const rlz = @import("raylib-zig");

pub fn build(b: *std.Build) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const project_name = "seam-carving";

    const raylib_dep = b.dependency("raylib-zig", .{
        .target = target,
        .optimize = optimize,
    });

    const raylib = raylib_dep.module("raylib");
    const raylib_artifact = raylib_dep.artifact("raylib");

    //web exports are completely separate
    if (target.query.os_tag == .emscripten) {
        const exe_lib = rlz.emcc.compileForEmscripten(b, project_name, "src/main.zig", target, optimize);

        exe_lib.linkLibrary(raylib_artifact);
        exe_lib.root_module.addImport("raylib", raylib);

        // Note that raylib itself is not actually added to the exe_lib output file, so it also needs to be linked with emscripten.
        const link_step = try rlz.emcc.linkWithEmscripten(b, &[_]*std.Build.Step.Compile{ exe_lib, raylib_artifact });

        b.getInstallStep().dependOn(&link_step.step);
        const run_step = try rlz.emcc.emscriptenRunStep(b);
        run_step.step.dependOn(&link_step.step);

        const run_label = try std.fmt.allocPrint(b.allocator, "Run {s}", .{project_name});
        const run_option = b.step("run", run_label);
        run_option.dependOn(&run_step.step);
        return;
    }

    const exe = b.addExecutable(.{ .name = project_name, .root_source_file = b.path("src/main.zig"), .optimize = optimize, .target = target });

    exe.linkLibrary(raylib_artifact);
    exe.root_module.addImport("raylib", raylib);

    const run_cmd = b.addRunArtifact(exe);
    const run_label = try std.fmt.allocPrint(b.allocator, "Run {s}", .{project_name});
    const run_step = b.step("run", run_label);
    run_step.dependOn(&run_cmd.step);

    b.installArtifact(exe);
}