findNativeCrtDirWindows

fn findNativeCrtDirWindows(
    self: *LibCInstallation,
    gpa: Allocator,
    io: Io,
    target: *const std.Target,
    sdk: std.zig.WindowsSdk,
) FindError!void {
    var install_buf: [2]std.zig.WindowsSdk.Installation = undefined;
    const installs = fillInstallations(&install_buf, sdk);

    var result_buf = std.array_list.Managed(u8).init(gpa);
    defer result_buf.deinit();

    const arch_sub_dir = switch (target.cpu.arch) {
        .x86 => "x86",
        .x86_64 => "x64",
        .thumb => "arm",
        .aarch64 => "arm64",
        else => return error.UnsupportedArchitecture,
    };

    for (installs) |install| {
        result_buf.shrinkAndFree(0);
        try result_buf.print("{s}\\Lib\\{s}\\ucrt\\{s}", .{ install.path, install.version, arch_sub_dir });

        var dir = Io.Dir.cwd().openDir(io, result_buf.items, .{}) catch |err| switch (err) {
            error.FileNotFound,
            error.NotDir,
            error.NoDevice,
            => continue,

            else => return error.FileSystem,
        };
        defer dir.close(io);

        dir.access(io, "ucrt.lib", .{}) catch |err| switch (err) {
            error.FileNotFound => continue,
            else => return error.FileSystem,
        };

        self.crt_dir = try result_buf.toOwnedSlice();
        return;
    }
    return error.LibCRuntimeNotFound;
}