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| <!-- Generated with Stardoc: http://skydoc.bazel.build --> |
| <h1 id="rust_librarybzl"><a class="header" href="#rust_librarybzl">rust_library.bzl</a></h1> |
| <p><a id="rust_library"></a></p> |
| <h2 id="rust_library"><a class="header" href="#rust_library">rust_library</a></h2> |
| <pre> |
| load("@rules_rust//rust:rust_library.bzl", "rust_library") |
| |
| rust_library(<a href="#rust_library-name">name</a>, <a href="#rust_library-deps">deps</a>, <a href="#rust_library-srcs">srcs</a>, <a href="#rust_library-data">data</a>, <a href="#rust_library-aliases">aliases</a>, <a href="#rust_library-allocator_libraries">allocator_libraries</a>, <a href="#rust_library-alwayslink">alwayslink</a>, <a href="#rust_library-compile_data">compile_data</a>, |
| <a href="#rust_library-crate_features">crate_features</a>, <a href="#rust_library-crate_name">crate_name</a>, <a href="#rust_library-crate_root">crate_root</a>, <a href="#rust_library-disable_pipelining">disable_pipelining</a>, <a href="#rust_library-edition">edition</a>, <a href="#rust_library-link_deps">link_deps</a>, |
| <a href="#rust_library-lint_config">lint_config</a>, <a href="#rust_library-proc_macro_deps">proc_macro_deps</a>, <a href="#rust_library-require_explicit_unstable_features">require_explicit_unstable_features</a>, <a href="#rust_library-root_path">root_path</a>, <a href="#rust_library-rustc_env">rustc_env</a>, |
| <a href="#rust_library-rustc_env_files">rustc_env_files</a>, <a href="#rust_library-rustc_flags">rustc_flags</a>, <a href="#rust_library-stamp">stamp</a>, <a href="#rust_library-unstable_rust_features_config">unstable_rust_features_config</a>, <a href="#rust_library-version">version</a>, |
| <a href="#rust_library-zself_profile_events">zself_profile_events</a>) |
| </pre> |
| <p>Builds a Rust library crate.</p> |
| <p>Example:</p> |
| <p>Suppose you have the following directory structure for a simple Rust library crate:</p> |
| <pre><code class="language-output">[workspace]/ |
| WORKSPACE |
| hello_lib/ |
| BUILD |
| src/ |
| greeter.rs |
| lib.rs |
| </code></pre> |
| <p><code>hello_lib/src/greeter.rs</code>:</p> |
| <pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)] |
| </span><span class="boring">fn main() { |
| </span>pub struct Greeter { |
| greeting: String, |
| } |
| |
| impl Greeter { |
| pub fn new(greeting: &str) -> Greeter { |
| Greeter { greeting: greeting.to_string(), } |
| } |
| |
| pub fn greet(&self, thing: &str) { |
| println!("{} {}", &self.greeting, thing); |
| } |
| } |
| <span class="boring">}</span></code></pre></pre> |
| <p><code>hello_lib/src/lib.rs</code>:</p> |
| <pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)] |
| </span><span class="boring">fn main() { |
| </span>pub mod greeter; |
| <span class="boring">}</span></code></pre></pre> |
| <p><code>hello_lib/BUILD</code>:</p> |
| <pre><code class="language-python">package(default_visibility = ["//visibility:public"]) |
| |
| load("@rules_rust//rust:defs.bzl", "rust_library") |
| |
| rust_library( |
| name = "hello_lib", |
| srcs = [ |
| "src/greeter.rs", |
| "src/lib.rs", |
| ], |
| ) |
| </code></pre> |
| <p>Build the library:</p> |
| <pre><code class="language-output">$ bazel build //hello_lib |
| INFO: Found 1 target... |
| Target //examples/rust/hello_lib:hello_lib up-to-date: |
| bazel-bin/examples/rust/hello_lib/libhello_lib.rlib |
| INFO: Elapsed time: 1.245s, Critical Path: 1.01s |
| </code></pre> |
| <p><strong>ATTRIBUTES</strong></p> |
| <div class="table-wrapper"><table><thead><tr><th style="text-align: left">Name</th><th style="text-align: left">Description</th><th style="text-align: left">Type</th><th style="text-align: left">Mandatory</th><th style="text-align: left">Default</th></tr></thead><tbody> |
| <tr><td style="text-align: left"><a id="rust_library-name"></a>name</td><td style="text-align: left">A unique name for this target.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels#target-names">Name</a></td><td style="text-align: left">required</td><td style="text-align: left"></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-deps"></a>deps</td><td style="text-align: left">List of other Rust libraries to be linked to this library target.<br><br>These must be targets that provide <code>CrateInfo</code>, such as <code>rust_library</code>.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-srcs"></a>srcs</td><td style="text-align: left">List of Rust <code>.rs</code> source files used to build the library.<br><br>If <code>srcs</code> contains more than one file, then there must be a file either named <code>lib.rs</code>. Otherwise, <code>crate_root</code> must be set to the source file that is the root of the crate to be passed to rustc to build this crate.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-data"></a>data</td><td style="text-align: left">List of files used by this rule at compile time and runtime.<br><br>If including data at compile time with include_str!() and similar, prefer <code>compile_data</code> over <code>data</code>, to prevent the data also being included in the runfiles.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-aliases"></a>aliases</td><td style="text-align: left">Remap crates to a new name or moniker for linkage to this target<br><br>These are other <code>rust_library</code> targets and will be presented as the new name given.</td><td style="text-align: left"><a href="https://bazel.build/rules/lib/dict">Dictionary: Label -> String</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>{}</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-allocator_libraries"></a>allocator_libraries</td><td style="text-align: left">-</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">Label</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>"@rules_rust//ffi/rs:default_allocator_libraries"</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-alwayslink"></a>alwayslink</td><td style="text-align: left">If 1, any binary that depends (directly or indirectly) on this library will link in all the object files even if some contain no symbols referenced by the binary.<br><br>This attribute is used by the C++ Starlark API when passing CcInfo providers.</td><td style="text-align: left">Boolean</td><td style="text-align: left">optional</td><td style="text-align: left"><code>False</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-compile_data"></a>compile_data</td><td style="text-align: left">List of files used by this rule at compile time.<br><br>This attribute can be used to specify any data files that are embedded into the library, such as via the <a href="https://doc.rust-lang.org/std/macro.include_str!.html"><code>include_str!</code></a> macro.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-crate_features"></a>crate_features</td><td style="text-align: left">List of features to enable for this crate.<br><br>Features are defined in the code using the <code>#[cfg(feature = "foo")]</code> configuration option. The features listed here will be passed to <code>rustc</code> with <code>--cfg feature="${feature_name}"</code> flags.</td><td style="text-align: left">List of strings</td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-crate_name"></a>crate_name</td><td style="text-align: left">Crate name to use for this target.<br><br>This must be a valid Rust identifier, i.e. it may contain only alphanumeric characters and underscores. Defaults to the target name, with any hyphens replaced by underscores.</td><td style="text-align: left">String</td><td style="text-align: left">optional</td><td style="text-align: left"><code>""</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-crate_root"></a>crate_root</td><td style="text-align: left">The file that will be passed to <code>rustc</code> to be used for building this crate.<br><br>If <code>crate_root</code> is not set, then this rule will look for a <code>lib.rs</code> file (or <code>main.rs</code> for rust_binary) or the single file in <code>srcs</code> if <code>srcs</code> contains only one file.<br><br>If the <code>srcs</code> contains only one file and that file is a directory, use <code>root_path</code> to specify the path to the crate root .rs file under that directory.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">Label</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>None</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-disable_pipelining"></a>disable_pipelining</td><td style="text-align: left">Disables pipelining for this rule if it is globally enabled. This will cause this rule to not produce a <code>.rmeta</code> file and all the dependent crates will instead use the <code>.rlib</code> file.</td><td style="text-align: left">Boolean</td><td style="text-align: left">optional</td><td style="text-align: left"><code>False</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-edition"></a>edition</td><td style="text-align: left">The rust edition to use for this crate. Defaults to the edition specified in the rust_toolchain.</td><td style="text-align: left">String</td><td style="text-align: left">optional</td><td style="text-align: left"><code>""</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-link_deps"></a>link_deps</td><td style="text-align: left">List of other native libraries to be linked to this library target.<br><br>These are typically <code>cc_library</code> targets.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-lint_config"></a>lint_config</td><td style="text-align: left">Set of lints to apply when building this crate.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">Label</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>None</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-proc_macro_deps"></a>proc_macro_deps</td><td style="text-align: left">List of <code>rust_proc_macro</code> targets used to help build this library target.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-require_explicit_unstable_features"></a>require_explicit_unstable_features</td><td style="text-align: left">Whether to require all unstable features to be explicitly opted in to using <code>-Zallow-features=...</code>. Possible values: [-1, 0, 1]. -1 means delegate to the toolchain.require_explicit_unstable_features boolean build setting; 0 means False; 1 means True.</td><td style="text-align: left">Integer</td><td style="text-align: left">optional</td><td style="text-align: left"><code>-1</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-root_path"></a>root_path</td><td style="text-align: left">If the crate root (single member of the <code>srcs</code> list) is a directory, this is the path to the crate root <code>.rs</code> file under that directory.</td><td style="text-align: left">String</td><td style="text-align: left">optional</td><td style="text-align: left"><code>""</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-rustc_env"></a>rustc_env</td><td style="text-align: left">Dictionary of additional <code>"key": "value"</code> environment variables to set for rustc.<br><br>rust_test()/rust_binary() rules can use $(rootpath //package:target) to pass in the location of a generated file or external tool. Cargo build scripts that wish to expand locations should use cargo_build_script()'s build_script_env argument instead, as build scripts are run in a different environment - see cargo_build_script()'s documentation for more.</td><td style="text-align: left"><a href="https://bazel.build/rules/lib/dict">Dictionary: String -> String</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>{}</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-rustc_env_files"></a>rustc_env_files</td><td style="text-align: left">Files containing additional environment variables to set for rustc.<br><br>These files should contain a single variable per line, of format <code>NAME=value</code>, and newlines may be included in a value by ending a line with a trailing back-slash (<code>\\</code>).<br><br>The order that these files will be processed is unspecified, so multiple definitions of a particular variable are discouraged.<br><br>Note that the variables here are subject to <a href="https://docs.bazel.build/versions/main/user-manual.html#workspace_status">workspace status</a> stamping should the <code>stamp</code> attribute be enabled. Stamp variables should be wrapped in brackets in order to be resolved. E.g. <code>NAME={WORKSPACE_STATUS_VARIABLE}</code>.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">List of labels</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-rustc_flags"></a>rustc_flags</td><td style="text-align: left">List of compiler flags passed to <code>rustc</code>.<br><br>These strings are subject to Make variable expansion for predefined source/output path variables like <code>$location</code>, <code>$execpath</code>, and <code>$rootpath</code>. This expansion is useful if you wish to pass a generated file of arguments to rustc: <code>@$(location //package:target)</code>.</td><td style="text-align: left">List of strings</td><td style="text-align: left">optional</td><td style="text-align: left"><code>[]</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-stamp"></a>stamp</td><td style="text-align: left">Whether to encode build information into the <code>Rustc</code> action. Possible values:<br><br>- <code>stamp = 1</code>: Always stamp the build information into the <code>Rustc</code> action, even in <a href="https://docs.bazel.build/versions/main/user-manual.html#flag--stamp">--nostamp</a> builds. This setting should be avoided, since it potentially kills remote caching for the target and any downstream actions that depend on it.<br><br>- <code>stamp = 0</code>: Always replace build information by constant values. This gives good build result caching.<br><br>- <code>stamp = -1</code>: Embedding of build information is controlled by the <a href="https://docs.bazel.build/versions/main/user-manual.html#flag--stamp">--[no]stamp</a> flag.<br><br>Stamped targets are not rebuilt unless their dependencies change.<br><br>For example if a <code>rust_library</code> is stamped, and a <code>rust_binary</code> depends on that library, the stamped library won't be rebuilt when we change sources of the <code>rust_binary</code>. This is different from how <a href="https://docs.bazel.build/versions/main/be/c-cpp.html#cc_library.linkstamp"><code>cc_library.linkstamps</code></a> behaves.</td><td style="text-align: left">Integer</td><td style="text-align: left">optional</td><td style="text-align: left"><code>0</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-unstable_rust_features_config"></a>unstable_rust_features_config</td><td style="text-align: left">Controls which unstable features are allowed to be used by this target. Setting this to anything other than None requires a nightly toolchain.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">Label</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>None</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-version"></a>version</td><td style="text-align: left">A version to inject in the cargo environment variable.</td><td style="text-align: left">String</td><td style="text-align: left">optional</td><td style="text-align: left"><code>"0.0.0"</code></td></tr> |
| <tr><td style="text-align: left"><a id="rust_library-zself_profile_events"></a>zself_profile_events</td><td style="text-align: left">Passes -Zself-profile and -Zself-profile-events flag to rustc, requires a nightly toolchain.</td><td style="text-align: left"><a href="https://bazel.build/concepts/labels">Label</a></td><td style="text-align: left">optional</td><td style="text-align: left"><code>None</code></td></tr> |
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