Bazel Central Registry

@rules_rs//rs:cargo_build_script.bzl

Functions & Macros

cargo_build_script

Compile and execute a rust build script to generate build attributes

This rules take the same arguments as rust_binary.

Example:

Suppose you have a crate with a cargo build script build.rs:

[workspace]/
    hello_lib/
        BUILD
        build.rs
        src/
            lib.rs

Then you want to use the build script in the following:

hello_lib/BUILD:

package(default_visibility = ["//visibility:public"])

load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library")
load("@rules_rust//cargo:defs.bzl", "cargo_build_script")

# This will run the build script from the root of the workspace, and
# collect the outputs.
cargo_build_script(
    name = "build_script",
    srcs = ["build.rs"],
    # Optional environment variables passed during build.rs compilation
    rustc_env = {
       "CARGO_PKG_VERSION": "0.1.2",
    },
    # Optional environment variables passed during build.rs execution.
    # Note that as the build script's working directory is not execroot,
    # execpath/location will return an absolute path, instead of a relative
    # one.
    build_script_env = {
        "SOME_TOOL_OR_FILE": "$(execpath @tool//:binary)"
    },
    # Optional data/tool dependencies
    data = ["@tool//:binary"],
)

rust_library(
    name = "hello_lib",
    srcs = [
        "src/lib.rs",
    ],
    deps = [":build_script"],
)

The hello_lib target will be build with the flags and the environment variables declared by the build script in addition to the file generated by it.

Parameters

`*name`	The name for the underlying rule. This should be the name of the package being compiled, optionally with a suffix of `_bs`. Otherwise, you can set the package name via `pkg_name`.
`edition`	The rust edition to use for the internal binary crate. Default: `None`
`crate_name`	Crate name to use for build script. Default: `None`
`crate_root`	The file that will be passed to rustc to be used for building this crate. Default: `None`
`srcs`	Source files of the crate to build. Passing source files here can be used to trigger rebuilds when changes are made. Default: `[]`
`crate_features`	A list of features to enable for the build script. Default: `[]`
`version`	The semantic version (semver) of the crate. Default: `None`
`deps`	The build-dependencies of the crate. Default: `[]`
`link_deps`	The subset of the (normal) dependencies of the crate that have the links attribute and therefore provide environment variables to this build script. Default: `[]`
`proc_macro_deps`	List of rust_proc_macro targets used to build the script. Default: `[]`
`build_script_env`	Environment variables for build scripts. Default: `{}`
`build_script_env_files`	Files containing additional environment variables to set when running the build script. Default: `[]`
`use_default_shell_env`	Whether or not to include the default shell environment for the build script action. If unset the global setting `@rules_rust//cargo/settings:use_default_shell_env` will be used to determine this value. Default: `None`
`data`	Files needed by the build script. Default: `[]`
`compile_data`	Files needed for the compilation of the build script. Default: `[]`
`tools`	Tools (executables) needed by the build script. Default: `[]`
`links`	Name of the native library this crate links against. Default: `None`
`rustc_env`	Environment variables to set in rustc when compiling the build script. Default: `{}`
`rustc_env_files`	Files containing additional environment variables to set for rustc when building the build script. Default: `[]`
`rustc_flags`	List of compiler flags passed to `rustc`. Default: `[]`
`visibility`	Visibility to apply to the generated build script output. Default: `None`
`tags`	(list of str, optional): Tags to apply to the generated build script output. Default: `None`
`aliases`	Remap crates to a new name or moniker for linkage to this target. These are other `rust_library` targets and will be presented as the new name given. Default: `None`
`pkg_name`	Override the package name used for the build script. This is useful if the build target name gets too long otherwise. Default: `None`
`kwargs`	Forwards to the underlying `rust_binary` rule. An exception is the `compatible_with` attribute, which shouldn't be forwarded to the `rust_binary`, as the `rust_binary` is only built and used in `exec` mode. We propagate the `compatible_with` attribute to the `_build_script_run` target.

@rules_rs//rs:extensions.bzl

Module Extensions

crate

Tag Classes

annotation

A collection of extra attributes and settings for a particular crate.

Attribute	Type	Description
`*crate`	`string`	The name of the crate the annotation is applied to
`version`	`string`	The version of the crate the annotation is applied to. Defaults to all versions. Default: `"*"`
`repositories`	`list of strings`	A list of repository names specified from `crate.from_cargo(name=...)` that this annotation is applied to. Defaults to all repositories. Default: `[]`
`additive_build_file`	`label`	A file containing extra contents to write to the bottom of generated BUILD files. Default: `None`
`additive_build_file_content`	`string`	Extra contents to write to the bottom of generated BUILD files. Default: `""`
`build_script_data`	`list of strings`	A list of labels to add to a crate's `cargo_build_script::data` attribute. Default: `[]`
`build_script_data_select`	`dictionary: String → List of strings`	A list of labels to add to a crate's `cargo_build_script::data` attribute. Keys should be the platform triplet. Value should be a list of labels. Default: `{}`
`build_script_env`	`dictionary: String → String`	Additional environment variables to set on a crate's `cargo_build_script::env` attribute. Default: `{}`
`build_script_env_select`	`dictionary: String → String`	Additional environment variables to set on a crate's `cargo_build_script::env` attribute. Key should be the platform triplet. Value should be a JSON encoded dictionary mapping variable names to values, for example `{"FOO": "bar"}`. Default: `{}`
`build_script_toolchains`	`list of labels`	A list of labels to set on a crates's `cargo_build_script::toolchains` attribute. Default: `[]`
`build_script_tags`	`list of strings`	A list of tags to add to a crate's `cargo_build_script` target. Default: `[]`
`build_script_tools`	`list of strings`	A list of labels to add to a crate's `cargo_build_script::tools` attribute. Default: `[]`
`build_script_tools_select`	`dictionary: String → List of strings`	A list of labels to add to a crate's `cargo_build_script::tools` attribute. Keys should be the platform triplet. Value should be a list of labels. Default: `{}`
`crate_features`	`list of strings`	A list of strings to add to a crate's `rust_library::crate_features` attribute. Default: `[]`
`crate_features_select`	`dictionary: String → List of strings`	A list of strings to add to a crate's `rust_library::crate_features` attribute. Keys should be the platform triplet. Value should be a list of features. Default: `{}`
`data`	`list of strings`	A list of labels to add to a crate's `rust_library::data` attribute. Default: `[]`
`deps`	`list of strings`	A list of labels to add to a crate's `rust_library::deps` attribute. Default: `[]`
`tags`	`list of strings`	A list of tags to add to a crate's generated targets. Default: `[]`
`extra_aliased_targets`	`dictionary: String → String`	A list of targets to add to the generated aliases in the root crate repository. Default: `{}`
`gen_binaries`	`list of strings`	As a list, the subset of the crate's bins that should get `rust_binary` targets produced. Default: `[]`
`gen_build_script`	`string`	An authoritative flag to determine whether or not to produce `cargo_build_script` targets for the current crate. Supported values are 'on', 'off', and 'auto'. Default: `"auto"`
`patch_args`	`list of strings`	The `patch_args` attribute of a Bazel repository rule. See http_archive.patch_args Default: `[]`
`patch_tool`	`string`	The `patch_tool` attribute of a Bazel repository rule. See http_archive.patch_tool Default: `""`
`patches`	`list of labels`	The `patches` attribute of a Bazel repository rule. See http_archive.patches Default: `[]`
`rustc_flags`	`list of strings`	A list of strings to set on a crate's `rust_library::rustc_flags` attribute. Default: `[]`
`rustc_flags_select`	`dictionary: String → List of strings`	A list of strings to set on a crate's `rust_library::rustc_flags` attribute. Keys should be the platform triplet. Value should be a list of flags. Default: `{}`
`strip_prefix`	`string`	Default: `""`
`workspace_cargo_toml`	`string`	For crates from git, the ruleset assumes the (workspace) Cargo.toml is in the repo root. This attribute overrides the assumption. Default: `"Cargo.toml"`

from_cargo

Generates a repo @crates from a Cargo.toml / Cargo.lock pair.

Attribute	Type	Description
`name`	`name`	The name of the repo to generate Default: `"crates"`
`cargo_toml`	`label`	The workspace-level Cargo.toml. There can be multiple crates in the workspace. Default: `None`
`cargo_lock`	`label`	Default: `None`
`cargo_config`	`label`	Default: `None`
`use_home_cargo_credentials`	`boolean`	If set, the ruleset will load `~/cargo/credentials.toml` and attach those credentials to registry requests. Default: `False`
`*platform_triples`	`list of strings`	The set of triples to resolve for. They must correspond to the union of any exec/target platforms that will participate in your build.
`use_legacy_rules_rust_platforms`	`boolean`	If true, use the legacy rules_rust platforms. If false, use rules_rs platforms. Default: `False`
`validate_lockfile`	`boolean`	If true, fail if Cargo.lock versions don't satisfy Cargo.toml requirements. Default: `True`
`debug`	`boolean`	Default: `False`

@rules_rs//rs:rules_rust_prost.bzl

Module extension that provisions the rules_rust_prost repository.

Module Extensions

rules_rust_prost

@rules_rs//rs:rules_rust_pyo3.bzl

Module extension that provisions the rules_rust_pyo3 repository.

Module Extensions

rules_rust_pyo3

@rules_rs//rs:rules_rust_reexported_extensions.bzl

Module Extensions

rust

Rust toolchain extension.

Tag Classes

repository_set

Tags for defining rust repository sets (where toolchains are defined).

Attribute	Type	Description
`auth`	`dictionary: String → String`	Auth object compatible with repository_ctx.download to use when downloading files. Default: `{}`
`auth_patterns`	`dictionary: String → String`	Override mapping of hostnames to authorization patterns; mirrors the eponymous attribute from http_archive. Default: `{}`
`exec_compatible_with`	`list of labels`	A list of constraints for the execution platform for this toolchain. Default: `[]`
`exec_triple`	`string`	Exec triple for this repository_set. Default: `""`
`extra_exec_rustc_flags`	`list of strings`	Extra flags to pass to rustc in exec configuration. Default: `[]`
`extra_rustc_flags`	`list of strings`	Extra flags to pass to rustc in non-exec configuration. Default: `[]`
`name`	`name`	Name of the repository_set - if you're looking to replace default toolchains you must use the exact name you're replacing. Default: `""`
`netrc`	`string`	.netrc file to use for authentication; mirrors the eponymous attribute from http_archive. Default: `""`
`opt_level`	`dictionary: String → String`	Rustc optimization levels. For more details see the documentation for `rust_toolchain.opt_level`. Default: `{}`
`strip_level`	`dictionary: String → String`	Rustc strip levels. For more details see the documentation for `rust_toolchain.strip_level`. Default: `{}`
`target_compatible_with`	`list of labels`	List of platform constraints this toolchain produces, for the particular target_triple this call is for. Default: `[]`
`target_settings`	`list of labels`	A list of `config_settings` that must be satisfied by the target configuration in order for this toolchain to be selected during toolchain resolution. Default: `[]`
`target_triple`	`string`	target_triple to configure. Default: `""`
`versions`	`list of strings`	A list of toolchain versions to download. This parameter only accepts one version per channel. E.g. `["1.65.0", "nightly/2022-11-02", "beta/2020-12-30"]`. May be set to an empty list (`[]`) to inhibit `rules_rust` from registering toolchains. Default: `[]`
`allocator_library`	`label`	Target that provides allocator functions when rust_library targets are embedded in a cc_binary. Default: `None`
`dev_components`	`boolean`	Whether to download the rustc-dev components (defaults to False). Requires version to be "nightly". Default: `False`
`edition`	`string`	The rust edition to be used by default (2015, 2018, or 2021). If absent, every rule is required to specify its `edition` attribute. Default: `""`
`global_allocator_library`	`label`	Target that provides allocator functions when global allocator is used with cc_common.link. Default: `None`
`rustfmt_version`	`string`	The version of the tool among "nightly", "beta", or an exact version. Default: `"nightly/2026-04-16"`
`sha256s`	`dictionary: String → String`	A dict associating tool subdirectories to sha256 hashes. Default: `{}`
`urls`	`list of strings`	A list of mirror urls containing the tools from the Rust-lang static file server. These must contain the '{}' used to substitute the tool being fetched (using .format). Default: `["https://static.rust-lang.org/dist/{}.tar.xz"]`

toolchain

Tags for defining rust toolchains (where toolchain tools are fetched).

Attribute	Type	Description
`aliases`	`dictionary: String → String`	Map of full toolchain repository name to an alias. If any repository is created by this extension matches a key in this dictionary, the name of the created repository will be remapped to the value instead. This may be required to work around path length limits on Windows. Default: `{}`
`extra_exec_rustc_flags`	`list of strings`	Extra flags to pass to rustc in exec configuration Default: `[]`
`extra_rustc_flags`	`list of strings`	Extra flags to pass to rustc in non-exec configuration Default: `[]`
`extra_rustc_flags_triples`	`dictionary: String → List of strings`	Extra flags to pass to rustc in non-exec configuration. Key is the triple, value is the flag. Default: `{}`
`extra_target_triples`	`list of strings`	Default: `["aarch64-apple-darwin", "aarch64-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-unknown-linux-gnu", "wasm32-unknown-unknown", "wasm32-wasip1", "wasm32-wasip2"]`
`rust_analyzer_version`	`string`	The version of Rustc to pair with rust-analyzer. Default: `""`
`rustfmt_toolchain_triples`	`dictionary: String → String`	Like toolchain_triples, but for rustfmt toolchains. Mapping of rust target triple to repository name. Default: `{}`
`strip_level`	`dictionary: String → String`	Rustc strip levels. For more details see the documentation for `rust_toolchain.strip_level`. Default: `{}`
`target_settings`	`list of labels`	A list of `config_settings` that must be satisfied by the target configuration in order for this toolchain to be selected during toolchain resolution. Default: `[]`
`versions`	`list of strings`	A list of toolchain versions to download. This parameter only accepts one version per channel. E.g. `["1.65.0", "nightly/2022-11-02", "beta/2020-12-30"]`. May be set to an empty list (`[]`) to inhibit `rules_rust` from registering toolchains. Default: `["1.95.0", "nightly/2026-04-16"]`
`allocator_library`	`label`	Target that provides allocator functions when rust_library targets are embedded in a cc_binary. Default: `None`
`dev_components`	`boolean`	Whether to download the rustc-dev components (defaults to False). Requires version to be "nightly". Default: `False`
`edition`	`string`	The rust edition to be used by default (2015, 2018, or 2021). If absent, every rule is required to specify its `edition` attribute. Default: `""`
`global_allocator_library`	`label`	Target that provides allocator functions when global allocator is used with cc_common.link. Default: `None`
`rustfmt_version`	`string`	The version of the tool among "nightly", "beta", or an exact version. Default: `"nightly/2026-04-16"`
`sha256s`	`dictionary: String → String`	A dict associating tool subdirectories to sha256 hashes. Default: `{}`
`urls`	`list of strings`	A list of mirror urls containing the tools from the Rust-lang static file server. These must contain the '{}' used to substitute the tool being fetched (using .format). Default: `["https://static.rust-lang.org/dist/{}.tar.xz"]`

rust_host_tools

An extension which exposes Rust tools compatible with the current host platform.

Tag Classes

host_tools

Attribute	Type	Description
`name`	`name`	The name of the module to create Default: `"rust_host_tools"`
`version`	`string`	The version of Rust to use for tools executed on the Bazel host. Default: `"1.95.0"`
`allocator_library`	`label`	Target that provides allocator functions when rust_library targets are embedded in a cc_binary. Default: `None`
`dev_components`	`boolean`	Whether to download the rustc-dev components (defaults to False). Requires version to be "nightly". Default: `False`
`edition`	`string`	The rust edition to be used by default (2015, 2018, or 2021). If absent, every rule is required to specify its `edition` attribute. Default: `""`
`global_allocator_library`	`label`	Target that provides allocator functions when global allocator is used with cc_common.link. Default: `None`
`rustfmt_version`	`string`	The version of the tool among "nightly", "beta", or an exact version. Default: `"nightly/2026-04-16"`
`sha256s`	`dictionary: String → String`	A dict associating tool subdirectories to sha256 hashes. Default: `{}`
`urls`	`list of strings`	A list of mirror urls containing the tools from the Rust-lang static file server. These must contain the '{}' used to substitute the tool being fetched (using .format). Default: `["https://static.rust-lang.org/dist/{}.tar.xz"]`

@rules_rs//rs:rules_rust.bzl

Module extension that provisions the rules_rust repository.

Module Extensions

rules_rust

Tag Classes

patch

Additional patches to apply to the pinned rules_rust archive.

Attribute	Type	Description
`patches`	`list of labels`	Additional patch files to apply to rules_rust. Default: `[]`
`strip`	`integer`	Equivalent to adding `-pN` when applying `patches`. Default: `0`

@rules_rs//rs:rust_binary.bzl

@rules_rs//rs:rust_library.bzl

@rules_rs//rs:rust_proc_macro.bzl

Functions & Macros

rust_proc_macro

Parameters

`*name`
`deps`	Default: `[]`
`proc_macro_deps`	Default: `[]`
`kwargs`

@rules_rs//rs:rust_shared_library.bzl

Functions & Macros

rust_shared_library

Parameters

`*name`
`deps`	Default: `[]`
`proc_macro_deps`	Default: `[]`
`kwargs`

@rules_rs//rs:rust_static_library.bzl

Functions & Macros

rust_static_library

Parameters

`*name`
`deps`	Default: `[]`
`proc_macro_deps`	Default: `[]`
`kwargs`

@rules_rs//rs:rust_test.bzl

@rules_rs//rs/platforms:declare_platforms.bzl

Platform definitions for Rust target triples.

Functions & Macros

declare_platforms

Parameters

targets

Default:

["aarch64-apple-darwin", "aarch64-pc-windows-msvc", "aarch64-unknown-linux-gnu", "i686-pc-windows-msvc", "i686-unknown-linux-gnu", "x86_64-pc-windows-gnu", "x86_64-pc-windows-msvc", "x86_64-unknown-linux-gnu", "aarch64-pc-windows-gnullvm", "aarch64-unknown-linux-musl", "arm-unknown-linux-gnueabi", "arm-unknown-linux-gnueabihf", "armv7-unknown-linux-gnueabihf", "loongarch64-unknown-linux-gnu", "loongarch64-unknown-linux-musl", "i686-pc-windows-gnu", "powerpc-unknown-linux-gnu", "powerpc64-unknown-linux-gnu", "powerpc64le-unknown-linux-gnu", "powerpc64le-unknown-linux-musl", "riscv64gc-unknown-linux-gnu", "s390x-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-gnullvm", "x86_64-unknown-freebsd", "x86_64-unknown-linux-musl", "x86_64-unknown-netbsd", "aarch64-apple-ios", "aarch64-apple-ios-macabi", "aarch64-apple-ios-sim", "aarch64-linux-android", "aarch64-unknown-fuchsia", "aarch64-unknown-none", "aarch64-unknown-none-softfloat", "aarch64-unknown-uefi", "arm-linux-androideabi", "arm-unknown-linux-musleabi", "arm-unknown-linux-musleabihf", "armv7-linux-androideabi", "armv7-unknown-linux-gnueabi", "armv7-unknown-linux-musleabi", "armv7-unknown-linux-musleabihf", "i686-linux-android", "i686-pc-windows-gnullvm", "i686-unknown-freebsd", "i686-unknown-linux-musl", "i686-unknown-uefi", "loongarch64-unknown-none", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "sparc64-unknown-linux-gnu", "thumbv6m-none-eabi", "thumbv7em-none-eabi", "thumbv7em-none-eabihf", "thumbv7m-none-eabi", "thumbv8m.main-none-eabi", "thumbv8m.main-none-eabihf", "wasm32-unknown-emscripten", "wasm32-unknown-unknown", "wasm32-wasip1", "wasm32-wasip1-threads", "wasm32-wasip2", "x86_64-apple-ios", "x86_64-apple-ios-macabi", "x86_64-linux-android", "x86_64-unknown-fuchsia", "x86_64-unknown-none", "x86_64-unknown-uefi"]

@rules_rs//rs/platforms:triples.bzl

Functions & Macros

triple_to_constraint_set

Parameters

*target_triple

@rules_rs//rs/platforms/config:declare_config_settings.bzl

Config settings for Rust target triples.

Functions & Macros

declare_config_settings

Parameters

targets

Default:

["aarch64-apple-darwin", "aarch64-pc-windows-msvc", "aarch64-unknown-linux-gnu", "i686-pc-windows-msvc", "i686-unknown-linux-gnu", "x86_64-pc-windows-gnu", "x86_64-pc-windows-msvc", "x86_64-unknown-linux-gnu", "aarch64-pc-windows-gnullvm", "aarch64-unknown-linux-musl", "arm-unknown-linux-gnueabi", "arm-unknown-linux-gnueabihf", "armv7-unknown-linux-gnueabihf", "loongarch64-unknown-linux-gnu", "loongarch64-unknown-linux-musl", "i686-pc-windows-gnu", "powerpc-unknown-linux-gnu", "powerpc64-unknown-linux-gnu", "powerpc64le-unknown-linux-gnu", "powerpc64le-unknown-linux-musl", "riscv64gc-unknown-linux-gnu", "s390x-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-gnullvm", "x86_64-unknown-freebsd", "x86_64-unknown-linux-musl", "x86_64-unknown-netbsd", "aarch64-apple-ios", "aarch64-apple-ios-macabi", "aarch64-apple-ios-sim", "aarch64-linux-android", "aarch64-unknown-fuchsia", "aarch64-unknown-none", "aarch64-unknown-none-softfloat", "aarch64-unknown-uefi", "arm-linux-androideabi", "arm-unknown-linux-musleabi", "arm-unknown-linux-musleabihf", "armv7-linux-androideabi", "armv7-unknown-linux-gnueabi", "armv7-unknown-linux-musleabi", "armv7-unknown-linux-musleabihf", "i686-linux-android", "i686-pc-windows-gnullvm", "i686-unknown-freebsd", "i686-unknown-linux-musl", "i686-unknown-uefi", "loongarch64-unknown-none", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "sparc64-unknown-linux-gnu", "thumbv6m-none-eabi", "thumbv7em-none-eabi", "thumbv7em-none-eabihf", "thumbv7m-none-eabi", "thumbv8m.main-none-eabi", "thumbv8m.main-none-eabihf", "wasm32-unknown-emscripten", "wasm32-unknown-unknown", "wasm32-wasip1", "wasm32-wasip1-threads", "wasm32-wasip2", "x86_64-apple-ios", "x86_64-apple-ios-macabi", "x86_64-linux-android", "x86_64-unknown-fuchsia", "x86_64-unknown-none", "x86_64-unknown-uefi"]

@rules_rs//rs/toolchains:declare_rust_analyzer_toolchains.bzl

Functions & Macros

declare_rust_analyzer_toolchains

Parameters

`*version`
`*rust_analyzer_version`
`execs`	Default: `["x86_64-unknown-linux-gnu", "aarch64-unknown-linux-gnu", "x86_64-pc-windows-msvc", "aarch64-pc-windows-msvc", "x86_64-apple-darwin", "aarch64-apple-darwin"]`

@rules_rs//rs/toolchains:declare_rustc_toolchains.bzl

Functions & Macros

declare_rustc_toolchains

Declare toolchains for all supported target platforms.

Parameters

`*version`
`*edition`
`extra_rustc_flags`	Default: `{}`
`extra_exec_rustc_flags`	Default: `{}`
`execs`	Default: `["x86_64-unknown-linux-gnu", "aarch64-unknown-linux-gnu", "x86_64-pc-windows-msvc", "aarch64-pc-windows-msvc", "x86_64-apple-darwin", "aarch64-apple-darwin"]`
`targets`	Default: ["aarch64-apple-darwin", "aarch64-pc-windows-msvc", "aarch64-unknown-linux-gnu", "i686-pc-windows-msvc", "i686-unknown-linux-gnu", "x86_64-pc-windows-gnu", "x86_64-pc-windows-msvc", "x86_64-unknown-linux-gnu", "aarch64-pc-windows-gnullvm", "aarch64-unknown-linux-musl", "arm-unknown-linux-gnueabi", "arm-unknown-linux-gnueabihf", "armv7-unknown-linux-gnueabihf", "loongarch64-unknown-linux-gnu", "loongarch64-unknown-linux-musl", "i686-pc-windows-gnu", "powerpc-unknown-linux-gnu", "powerpc64-unknown-linux-gnu", "powerpc64le-unknown-linux-gnu", "powerpc64le-unknown-linux-musl", "riscv64gc-unknown-linux-gnu", "s390x-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-gnullvm", "x86_64-unknown-freebsd", "x86_64-unknown-linux-musl", "x86_64-unknown-netbsd", "aarch64-apple-ios", "aarch64-apple-ios-macabi", "aarch64-apple-ios-sim", "aarch64-linux-android", "aarch64-unknown-fuchsia", "aarch64-unknown-none", "aarch64-unknown-none-softfloat", "aarch64-unknown-uefi", "arm-linux-androideabi", "arm-unknown-linux-musleabi", "arm-unknown-linux-musleabihf", "armv7-linux-androideabi", "armv7-unknown-linux-gnueabi", "armv7-unknown-linux-musleabi", "armv7-unknown-linux-musleabihf", "i686-linux-android", "i686-pc-windows-gnullvm", "i686-unknown-freebsd", "i686-unknown-linux-musl", "i686-unknown-uefi", "loongarch64-unknown-none", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "sparc64-unknown-linux-gnu", "thumbv6m-none-eabi", "thumbv7em-none-eabi", "thumbv7em-none-eabihf", "thumbv7m-none-eabi", "thumbv8m.main-none-eabi", "thumbv8m.main-none-eabihf", "wasm32-unknown-emscripten", "wasm32-unknown-unknown", "wasm32-wasip1", "wasm32-wasip1-threads", "wasm32-wasip2", "x86_64-apple-ios", "x86_64-apple-ios-macabi", "x86_64-linux-android", "x86_64-unknown-fuchsia", "x86_64-unknown-none", "x86_64-unknown-uefi"]

@rules_rs//rs/toolchains:declare_rustfmt_toolchains.bzl

Functions & Macros

declare_rustfmt_toolchains

Parameters

`*version`
`*rustfmt_version`
`*edition`
`execs`	Default: `["x86_64-unknown-linux-gnu", "aarch64-unknown-linux-gnu", "x86_64-pc-windows-msvc", "aarch64-pc-windows-msvc", "x86_64-apple-darwin", "aarch64-apple-darwin"]`

@rules_rs//rs/toolchains:module_extension.bzl

Module extension for configuring rules_rs Rust toolchains.

Module Extensions

toolchains

Tag Classes

toolchain

Attribute	Type	Description
`name`	`name`	Name of the generated toolchain repo. Default: `"default_rust_toolchains"`
`version`	`string`	Rust version (e.g. 1.86.0 or nightly/2025-04-03) Default: `"1.92.0"`
`rustfmt_version`	`string`	Rustfmt version (e.g. 1.86.0 or nightly/2025-04-03) Default: `""`
`rust_analyzer_version`	`string`	Rust-analyzer version (e.g. 1.86.0 or nightly/2025-04-03) Default: `""`
`edition`	`string`	Default edition to apply to toolchains. Default: `"2021"`
`extra_rustc_flags`	`dictionary: String → List of strings`	Additional rustc flags by target triple. Default: `{}`
`extra_exec_rustc_flags`	`dictionary: String → List of strings`	Additional rustc flags by exec triple. Default: `{}`

@rules_rs//rs/toolchains:toolchain_utils.bzl

Shared helpers for toolchain generation.

Functions & Macros

sanitize_triple

Parameters

*triple_str

sanitize_version

Parameters

*version