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refactor(bazel): use configured Rust toolchain root

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This commit is contained in:
alexion
2026-08-31 15:00:27 -04:00
parent 2234db4c9b
commit 85b49c5378
6 changed files with 154 additions and 155 deletions
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2
MODULE.bazel.lock generated
View File

@@ -93,7 +93,7 @@
"moduleExtensions": {
"//bazel:rust.bzl%rust": {
"general": {
"bzlTransitiveDigest": "0r4u+74QPphTHEzrdQIFSn4SfNM4AAJNlPyNGE8JwRs=",
"bzlTransitiveDigest": "4aaA6vAtrGES73j6RWZFmf/31/0PAazCSNi2ccK0w0E=",
"usagesDigest": "jJoM2Hp1NbshT//puE4xIUfXdA0K6BRx1WTlsZIKFm4=",
"recordedFileInputs": {},
"recordedDirentsInputs": {},

1
bazel/BUILD
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@@ -1,4 +1,5 @@
exports_files([
"rust.BUILD.tpl",
"rust.bzl",
"utils.bzl",
])

117
bazel/rust.BUILD.tpl Normal file
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@@ -0,0 +1,117 @@
filegroup(
name = "rustc",
srcs = ["toolchain/bin/rustc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustdoc",
srcs = ["toolchain/bin/rustdoc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cargo",
srcs = ["toolchain/bin/cargo"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cargo_clippy",
srcs = ["toolchain/bin/cargo-clippy"],
visibility = ["//visibility:public"],
)
filegroup(
name = "clippy_driver",
srcs = ["toolchain/bin/clippy-driver"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustfmt",
srcs = ["toolchain/bin/rustfmt"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cc",
srcs = ["toolchain/bin/cc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustc_lib",
srcs = glob(
[
"rust/lib/*.so*",
"rust/lib/rustlib/{host_triple}/codegen-backends/*.so",
"rust/lib/rustlib/{host_triple}/lib/*.so*",
"rust/lib/rustlib/{host_triple}/lib/*.rmeta",
],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
filegroup(
name = "rust_objcopy",
srcs = glob(
["rust/lib/rustlib/{host_triple}/bin/rust-objcopy"],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
load("@rules_rust//rust:toolchain.bzl", "rust_stdlib_filegroup")
rust_stdlib_filegroup(
name = "rust_std",
srcs = glob(
[
"rust/lib/rustlib/{host_triple}/lib/*.rlib",
"rust/lib/rustlib/{host_triple}/lib/*.rmeta",
"rust/lib/rustlib/{host_triple}/lib/*.so*",
"rust/lib/rustlib/{host_triple}/lib/*.a",
"rust/lib/rustlib/{host_triple}/lib/self-contained/**",
],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
rust_toolchain(
name = "toolchain_impl",
rust_doc = ":rustdoc",
rust_std = ":rust_std",
rustc = ":rustc",
linker = ":cc",
linker_type = "indirect",
rust_objcopy = ":rust_objcopy",
rustfmt = ":rustfmt",
cargo = ":cargo",
clippy_driver = ":clippy_driver",
cargo_clippy = ":cargo_clippy",
rustc_lib = ":rustc_lib",
allocator_library = None,
global_allocator_library = None,
binary_ext = "",
staticlib_ext = ".a",
dylib_ext = ".so",
stdlib_linkflags = ["-ldl", "-lpthread"],
default_edition = "2024",
exec_triple = "{host_triple}",
target_triple = "{host_triple}",
version = "{release}",
channel = "stable",
visibility = ["//visibility:public"],
)
toolchain(
name = "rust",
toolchain = ":toolchain_impl",
toolchain_type = "@rules_rust//rust:toolchain_type",
visibility = ["//visibility:public"],
)

153
bazel/rust.bzl
View File

@@ -1,14 +1,9 @@
load("//bazel:utils.bzl", "execute", "require")
load("//bazel:utils.bzl", "execute", "require_env")
def _rust_repository_impl(repository_ctx):
rustc = require(repository_ctx, "rustc")
rustdoc = require(repository_ctx, "rustdoc")
cargo = require(repository_ctx, "cargo")
cargo_clippy = require(repository_ctx, "cargo-clippy")
clippy_driver = require(repository_ctx, "clippy-driver")
rustfmt = require(repository_ctx, "rustfmt")
cc = require(repository_ctx, "cc")
root = repository_ctx.path(require_env(repository_ctx, "RUST_TOOLCHAIN_ROOT"))
rustc = root.get_child("bin/rustc")
sysroot = execute(repository_ctx, [str(rustc), "--print", "sysroot"])
verbose_version = execute(repository_ctx, [str(rustc), "-vV"])
@@ -26,148 +21,24 @@ def _rust_repository_impl(repository_ctx):
if release == None:
fail("rustc -vV did not report a release")
repository_ctx.symlink(rustc, "bin/rustc")
repository_ctx.symlink(rustdoc, "bin/rustdoc")
repository_ctx.symlink(cargo, "bin/cargo")
repository_ctx.symlink(cargo_clippy, "bin/cargo-clippy")
repository_ctx.symlink(clippy_driver, "bin/clippy-driver")
repository_ctx.symlink(rustfmt, "bin/rustfmt")
repository_ctx.symlink(cc, "bin/cc")
repository_ctx.symlink(root, "toolchain")
repository_ctx.symlink(sysroot, "rust")
repository_ctx.file("WORKSPACE.bazel", "")
repository_ctx.file("BUILD.bazel", _build_file(host_triple, release))
def _build_file(host_triple, release):
return """
filegroup(
name = "rustc",
srcs = ["bin/rustc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustdoc",
srcs = ["bin/rustdoc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cargo",
srcs = ["bin/cargo"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cargo_clippy",
srcs = ["bin/cargo-clippy"],
visibility = ["//visibility:public"],
)
filegroup(
name = "clippy_driver",
srcs = ["bin/clippy-driver"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustfmt",
srcs = ["bin/rustfmt"],
visibility = ["//visibility:public"],
)
filegroup(
name = "cc",
srcs = ["bin/cc"],
visibility = ["//visibility:public"],
)
filegroup(
name = "rustc_lib",
srcs = glob(
[
"rust/lib/*.so*",
"rust/lib/rustlib/{host_triple}/codegen-backends/*.so",
"rust/lib/rustlib/{host_triple}/lib/*.so*",
"rust/lib/rustlib/{host_triple}/lib/*.rmeta",
],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
filegroup(
name = "rust_objcopy",
srcs = glob(
["rust/lib/rustlib/{host_triple}/bin/rust-objcopy"],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
load("@rules_rust//rust:toolchain.bzl", "rust_stdlib_filegroup")
rust_stdlib_filegroup(
name = "rust_std",
srcs = glob(
[
"rust/lib/rustlib/{host_triple}/lib/*.rlib",
"rust/lib/rustlib/{host_triple}/lib/*.rmeta",
"rust/lib/rustlib/{host_triple}/lib/*.so*",
"rust/lib/rustlib/{host_triple}/lib/*.a",
"rust/lib/rustlib/{host_triple}/lib/self-contained/**",
],
allow_empty = True,
),
visibility = ["//visibility:public"],
)
load("@rules_rust//rust:toolchain.bzl", "rust_toolchain")
rust_toolchain(
name = "toolchain_impl",
rust_doc = ":rustdoc",
rust_std = ":rust_std",
rustc = ":rustc",
linker = ":cc",
linker_type = "indirect",
rust_objcopy = ":rust_objcopy",
rustfmt = ":rustfmt",
cargo = ":cargo",
clippy_driver = ":clippy_driver",
cargo_clippy = ":cargo_clippy",
rustc_lib = ":rustc_lib",
allocator_library = None,
global_allocator_library = None,
binary_ext = "",
staticlib_ext = ".a",
dylib_ext = ".so",
stdlib_linkflags = ["-ldl", "-lpthread"],
default_edition = "2024",
exec_triple = "{host_triple}",
target_triple = "{host_triple}",
version = "{release}",
channel = "stable",
visibility = ["//visibility:public"],
)
toolchain(
name = "rust",
toolchain = ":toolchain_impl",
toolchain_type = "@rules_rust//rust:toolchain_type",
visibility = ["//visibility:public"],
)
""".format(
host_triple = host_triple,
release = release,
repository_ctx.template(
"BUILD.bazel",
Label("//bazel:rust.BUILD.tpl"),
{
"{host_triple}": host_triple,
"{release}": release,
},
)
rust_repository = repository_rule(
implementation = _rust_repository_impl,
local = True,
environ = ["PATH"],
environ = ["RUST_TOOLCHAIN_ROOT"],
)

10
bazel/utils.bzl
View File

@@ -1,8 +1,8 @@
def require(repository_ctx, executable):
path = repository_ctx.which(executable)
if path == None:
fail("{} must be available in PATH.".format(executable))
return path
def require_env(repository_ctx, variable):
value = repository_ctx.os.environ.get(variable)
if not value:
fail("{} must be set.".format(variable))
return value
def execute(repository_ctx, arguments):

24
configs/nixos/modules/shell/rust.nix
View File

@@ -8,18 +8,28 @@
let
cfg = config.modules.shell.rust;
user = config.user.name;
toolchain = pkgs.symlinkJoin {
name = "rust-toolchain";
paths = with pkgs; [
cargo
clippy
gcc
rustc
rustfmt
];
};
in
{
options.modules.shell.rust.enable = lib.mkEnableOption "Rust tools for the primary user's shell environment";
config = lib.mkIf cfg.enable {
home-manager.users.${user}.home.packages = with pkgs; [
cargo
clippy
gcc
rust-analyzer
rustc
rustfmt
home-manager.users.${user} = {
home.packages = [
toolchain
pkgs.rust-analyzer
];
home.sessionVariables.RUST_TOOLCHAIN_ROOT = "${toolchain}";
};
};
}