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 exe = b.addExecutable(.{
        .name = "c2z",
        // 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 = .{ .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 unit_tests = b.addTest(.{
        .root_source_file = .{ .path = "./use_cases/tests.zig" },
        .target = target,
        .optimize = optimize,
    });

    // build and link use cases
    // see: https://stackoverflow.com/a/47951761
    const cflags = &.{ "-Xclang", "-fno-sanitize=undefined", "-fno-rtti" };
    const lib = b.addStaticLibrary(.{
        .name = "use_cases",
        .target = target,
        .optimize = optimize,
    });
    lib.addIncludePath("./use_cases/common_cases/include");
    if (target.getAbi() == .msvc) {
        // use x64 Native Tools Command Promp for VS 2019 and run: `zig build test -Doptimize=ReleaseFast -Dtarget=x86_64-windows-msvc`
        // use "cl /c /EHsc [FILES]"
        // use "lib [FILES]"
        @panic("msvc isn't supported");
        // const arch = switch (target.getCpu().arch) {
        //     .x86 => "x86",
        //     .x86_64 => "x64",
        //     else => @panic("unsupported architecture"),
        // };
        // lib.addSystemIncludePath("C:/Program Files (x86)/Microsoft Visual Studio/2019/BuildTools/VC/Tools/MSVC/14.28.29333/include");
        // lib.addSystemIncludePath("C:/Program Files (x86)/Windows Kits/10/Include/10.0.20348.0/ucrt");
        // // lib.addSystemIncludePath("C:/Program Files (x86)/Windows Kits/10/Include/10.0.20348.0/um");
        // // lib.addLibraryPath(b.fmt("C:/Program Files (x86)/Microsoft Visual Studio/2019/BuildTools/VC/Tools/MSVC/14.28.29333/lib/{s}", .{arch}));
        // // lib.addLibraryPath(b.fmt("C:/Program Files (x86)/Windows Kits/10/Lib/10.0.20348.0/ucrt/{s}", .{arch}));
        // // lib.addLibraryPath(b.fmt("C:/Program Files (x86)/Windows Kits/10/Lib/10.0.20348.0/um/{s}", .{arch}));
        // lib.linkSystemLibrary("msvcrt");
        // lib.linkSystemLibrary("msvcprt");
        // lib.linkSystemLibrary("vcruntime");
        // lib.linkSystemLibrary("ucrt");
    } else {
        lib.linkLibCpp();
    }
    lib.addCSourceFile("./use_cases/common_cases/include/c005_inheritance.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/include/c013_cpp_vector.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/include/c022_cpp_string.cpp", cflags);
    // glue files
    lib.addCSourceFile("./use_cases/common_cases/c005_inheritance_glue.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/c009_enum_flags_glue.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/c011_index_this_glue.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/c013_cpp_vector_glue.cpp", cflags);
    lib.addCSourceFile("./use_cases/common_cases/c022_cpp_string_glue.cpp", cflags);
    unit_tests.linkLibrary(lib);

    const cpp_mod = b.addModule("cpp", .{ .source_file = .{ .path = "src/cpp.zig" } });
    unit_tests.addModule("cpp", cpp_mod);

    const run_unit_tests = b.addRunArtifact(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_unit_tests.step);
}