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`
`rundir`	A directory to `cd` to before the cargo_build_script is run. This should be a path relative to the exec root. The default behaviour (and the behaviour if rundir is set to the empty string) is to change to the relative path corresponding to the cargo manifest directory, which replicates the normal behaviour of cargo so it is easy to write compatible build scripts. If set to `.`, the cargo build script will run in the exec root. 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_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. See rust_repositories for more details. 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. See rust_repositories for more details. 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. See rust_repositories for more details. 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", "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", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "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", "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", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "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", "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", "riscv32imc-unknown-none-elf", "riscv64gc-unknown-linux-musl", "riscv64gc-unknown-none-elf", "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