//! The fat service as a binary package (docs/build-packages-plan.md,
//! phase 2): this file names only what is specific to this binary — the shared
//! recipe and the default-import wiring live in build-support. The root build
//! consumes the artifact(s) for the boot image.

const std = @import("std");
const build_support = @import("build-support");

pub fn build(b: *std.Build) void {
    const protocol = b.dependency("protocol", .{});

    const exe = build_support.userBinary(b, .{
        .name = "fat",
        .root_source_file = b.path("fat.zig"),
        .domains = build_support.domains(b),
    });
    build_support.programModule(exe).addImport("vfs-protocol", protocol.module("vfs-protocol"));
    b.installArtifact(exe);

    // Standalone `zig build test`; the root aggregate depends on this step.
    const test_step = b.step("test", "Run the fat unit tests");
    for ([_][]const u8{
        "on-disk.zig", // FAT on-disk struct sizes + type detection
        "engine.zig", // FAT read/write over a RAM-backed image
    }) |test_root| {
        const unit_tests = b.addTest(.{
            .root_module = b.createModule(.{
                .root_source_file = b.path(test_root),
                .target = b.resolveTargetQuery(.{}),
            }),
        });
        test_step.dependOn(&b.addRunArtifact(unit_tests).step);
    }
}