const std = @import("std");

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

    const optimize = b.standardOptimizeOption(.{});

    const vk = b.dependency("vulkan-zig", .{
        .registry = @as([]const u8, b.pathFromRoot("reg/vk.xml")),
    });
    const vkmod = vk.module("vulkan-zig");

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

    // this requires PKG_CONFIG_PATH to be set. something like:
    //  ~/.local/lib/pkgconfig/
    exe.linkSystemLibrary2("glfw3", .{
        .needed = true,
        .preferred_link_mode = .static,
        .use_pkg_config = .force,
    });
    exe.linkLibC();

    b.installArtifact(exe);
    exe.root_module.addImport("vk", vkmod);

    const run_cmd = b.addRunArtifact(exe);

    run_cmd.step.dependOn(b.getInstallStep());

    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    const exe_unit_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });

    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);

    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_exe_unit_tests.step);
}