build.zig

const std = @import("std");

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

    var deps = std.StringHashMap(*std.Build.Module).init(b.allocator);

    const pcre_pkg = b.dependency("libpcre_zig", .{ .optimize = optimize, .target = target });
    const htmlentities_pkg = b.dependency("htmlentities_zig", .{ .optimize = optimize, .target = target });
    const uucode_pkg = b.dependency("uucode", .{
        .optimize = optimize,
        .target = target,
        .fields = @as([]const []const u8, &.{
            "general_category",
            "simple_lowercase_mapping",
        }),
    });
    const clap_pkg = b.dependency("clap", .{ .optimize = optimize, .target = target });

    try deps.put("clap", clap_pkg.module("clap"));
    try deps.put("libpcre", pcre_pkg.module("libpcre"));
    try deps.put("uucode", uucode_pkg.module("uucode"));
    try deps.put("htmlentities", htmlentities_pkg.module("htmlentities"));

    const mod = b.addModule("koino", .{
        .root_source_file = b.path("src/koino.zig"),
        .target = target,
        .optimize = optimize,
    });
    try addCommonRequirements(mod, &deps);

    // Workaround: uucode's generated tables trigger a crash in Zig's
    // self-hosted x86_64 backend. Force LLVM until this is resolved upstream.
    const exe = b.addExecutable(.{
        .name = "koino",
        .use_llvm = true,
        .root_module = b.createModule(.{
            .root_source_file = b.path("src/main.zig"),

            .target = target,
            .optimize = optimize,

            .imports = &.{
                .{ .name = "test_koino", .module = mod },
            },
        }),
    });
    try addCommonRequirements(exe.root_module, &deps);
    b.installArtifact(exe);

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

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

    const example = b.addExecutable(.{
        .name = "koino_example",
        .use_llvm = true,
        .root_module = b.createModule(.{
            .root_source_file = b.path("examples/to-html.zig"),

            .target = target,
            .optimize = optimize,

            .imports = &.{
                .{ .name = "test_koino", .module = mod },
            },
        }),
    });

    try addCommonRequirements(example.root_module, &deps);
    b.installArtifact(example);

    const example_run_cmd = b.addRunArtifact(example);
    example_run_cmd.step.dependOn(b.getInstallStep());
    const example_run_step = b.step("example", "Run example");
    example_run_step.dependOn(&example_run_cmd.step);

    const test_exe = b.addTest(.{
        .use_llvm = true,
        .root_module = b.createModule(.{
            .root_source_file = b.path("src/main.zig"),

            .target = target,
            .optimize = optimize,

            .imports = &.{
                .{ .name = "test_koino", .module = mod },
            },
        }),
    });
    try addCommonRequirements(test_exe.root_module, &deps);

    const test_step = b.step("test", "Run all the tests");
    const test_run = b.addRunArtifact(test_exe);
    test_step.dependOn(&test_run.step);
}

fn addCommonRequirements(mod: *std.Build.Module, deps: *const std.StringHashMap(*std.Build.Module)) !void {
    var it = deps.iterator();
    while (it.next()) |entry| {
        mod.addImport(entry.key_ptr.*, entry.value_ptr.*);
    }
    mod.linkSystemLibrary("c", .{});
}