1
RUST_STABLE_VERSION = "1.95.0"  # LLVM 22
2
 
3
RUST_NIGHTLY_VERSION = "nightly/2026-04-16"
4
 
5
RUST_TARGET_TRIPLES = [
6
    "x86_64-apple-darwin",
7
    "aarch64-unknown-linux-gnu",
8
    "aarch64-apple-darwin",
9
    "x86_64-unknown-linux-gnu",
10
    "x86_64-pc-windows-msvc",
11
]
12
 
13
rust = use_extension("@rules_rust//rust:extensions.bzl", "rust")
14
rust.toolchain(
15
    allocator_library = "@rules_rust//ffi/rs:empty",
16
    edition = "2024",
17
    extra_rustc_flags_triples = {
18
        # Enable ISA extensions matching the ones used for C++. The clmul feature is not included as
19
        # it is still "unstable" as of 1.86.0.
20
        "x86_64-unknown-linux-gnu": ["-Ctarget-feature=+sse4.2"],
21
        "x86_64-apple-darwin": ["-Ctarget-feature=+sse4.2"],
22
        "x86_64-pc-windows-msvc": ["-Ctarget-feature=+sse4.2"],
23
        "aarch64-unknown-linux-gnu": ["-Ctarget-feature=+crc"],
24
        # No options needed for aarch64-apple-darwin: CRC feature is enabled by default.
25
    },
26
    extra_target_triples = RUST_TARGET_TRIPLES,
27
    rustfmt_version = RUST_NIGHTLY_VERSION,
28
    versions = [
29
        RUST_STABLE_VERSION,
30
        RUST_NIGHTLY_VERSION,
31
    ],
32
)
33
use_repo(rust, "rust_toolchains")
34
 
35
register_toolchains("@rust_toolchains//:all")
36
 
37
# rust-based lolhtml dependency, including the API header.
38
# Presented as a separate repository to allow overrides.
39
new_local_repository = use_repo_rule("@bazel_tools//tools/build_defs/repo:local.bzl", "new_local_repository")
40
 
41
new_local_repository(
42
    name = "com_cloudflare_lol_html",
43
    build_file = "@workerd//deps/rust:BUILD.lolhtml",
44
    path = "empty",
45
)
46
 
47
# workerd-cxx
48
http = use_extension("@//:build/exts/http.bzl", "http")
49
 
50
inject_repo(
51
    http,
52
    **{"crates.io": "crates_vendor"}
53
)
54
 
55
crate = use_extension("@rules_rust//crate_universe:extensions.bzl", "crate")
56
crate.annotation(
57
    crate = "lol_html_c_api",
58
    extra_aliased_targets = {"lol_html_c_api_include_lol_html_h": "include/lol_html.h"},
59
)
60
crate.annotation(
61
    crate = "capnpc",
62
    gen_binaries = ["capnpc-rust"],
63
)
64
crate.from_cargo(
65
    # TODO(cleanup): This name is a bit misleading now that we don't vendor. We can clean it up as a
66
    # followup.
67
    name = "crates_vendor",
68
    cargo_lockfile = "//deps/rust:Cargo.lock",
69
    manifests = ["//deps/rust:Cargo.toml"],
70
    supported_platform_triples = RUST_TARGET_TRIPLES,
71
)
72
use_repo(
73
    crate,
74
    "crates_vendor",
75
)