CARGO-RUSTDOC(1)

NAME
cargo-rustdoc — Build a package’s documentation, using specified custom flags

SYNOPSIS
cargo rustdoc [options] [-- args]

DESCRIPTION
The specified target for the current package (or package specified by -p if provided) will be documented with the specified args being passed to the final rustdoc invocation. Dependencies will not be documented as part of this command. Note that rustdoc will still unconditionally receive arguments such as -L, --extern, and --crate-type, and the specified args will simply be added to the rustdoc invocation.

See <https://doc.rust-lang.org/rustdoc/index.html> for documentation on rustdoc flags.

This command requires that only one target is being compiled when additional arguments are provided. If more than one target is available for the current package the filters of --lib, --bin, etc, must be used to select which target is compiled.

To pass flags to all rustdoc processes spawned by Cargo, use the RUSTDOCFLAGS environment variable <https://doc.rust-lang.org/cargo/reference/environment-variables.html> or the build.rustdocflags config value <https://doc.rust-lang.org/cargo/reference/config.html>.

OPTIONS

  Documentation Options

--open
    Open the docs in a browser after building them. This will use your default browser unless you define another one in the BROWSER environment variable or use the doc.browser <https://doc.rust-lang.org/cargo/reference/config.html#docbrowser> configuration option.

  Package Selection
By default, the package in the current working directory is selected. The -p flag can be used to choose a different package in a workspace.

-p spec, --package spec
    The package to document. See cargo-pkgid(1) for the SPEC format.

  Target Selection
When no target selection options are given, cargo rustdoc will document all binary and library targets of the selected package. The binary will be skipped if its name is the same as the lib target. Binaries are skipped if they have required-features that are missing.

Passing target selection flags will document only the specified targets.

Note that --bin, --example, --test and --bench flags also support common Unix glob patterns like *, ? and []. However, to avoid your shell accidentally expanding glob patterns before Cargo handles them, you must use single quotes or double quotes around each glob pattern.

--lib
    Document the package’s library.

--bin name…
    Document the specified binary. This flag may be specified multiple times and supports common Unix glob patterns.

--bins
    Document all binary targets.

--example name…
    Document the specified example. This flag may be specified multiple times and supports common Unix glob patterns.

--examples
    Document all example targets.

--test name…
    Document the specified integration test. This flag may be specified multiple times and supports common Unix glob patterns.

--tests
    Document all targets that have the test = true manifest flag set. By default this includes the library and binaries built as unittests, and integration tests. Be aware that this will also build any required dependencies, so the lib target may be built twice (once as a unittest, and once as a dependency for binaries, integration tests, etc.). Targets may be enabled or disabled by setting the test flag in the manifest settings for the target.

--bench name…
    Document the specified benchmark. This flag may be specified multiple times and supports common Unix glob patterns.

--benches
    Document all targets that have the bench = true manifest flag set. By default this includes the library and binaries built as benchmarks, and bench targets. Be aware that this will also build any required dependencies, so the lib target may be built twice (once as a benchmark, and once as a dependency for binaries, benchmarks, etc.). Targets may be enabled or disabled by setting the bench flag in the manifest settings for the target.

--all-targets
    Document all targets. This is equivalent to specifying --lib --bins --tests --benches --examples.

  Feature Selection
The feature flags allow you to control which features are enabled. When no feature options are given, the default feature is activated for every selected package.

See the features documentation <https://doc.rust-lang.org/cargo/reference/features.html#command-line-feature-options> for more details.

-F features, --features features
    Space or comma separated list of features to activate. Features of workspace members may be enabled with package-name/feature-name syntax. This flag may be specified multiple times, which enables all specified features.

--all-features
    Activate all available features of all selected packages.

--no-default-features
    Do not activate the default feature of the selected packages.

  Compilation Options

--target triple
    Document for the given architecture. The default is the host architecture. The general format of the triple is <arch><sub>-<vendor>-<sys>-<abi>. Run rustc --print target-list for a list of supported targets. This flag may be specified multiple times.

    This may also be specified with the build.target config value <https://doc.rust-lang.org/cargo/reference/config.html>.

    Note that specifying this flag makes Cargo run in a different mode where the target artifacts are placed in a separate directory. See the build cache <https://doc.rust-lang.org/cargo/reference/build-cache.html> documentation for more details.

-r, --release
    Document optimized artifacts with the release profile. See also the --profile option for choosing a specific profile by name.

--profile name
    Document with the given profile. See the reference <https://doc.rust-lang.org/cargo/reference/profiles.html> for more details on profiles.

--timings=fmts
    Output information how long each compilation takes, and track concurrency information over time. Accepts an optional comma-separated list of output formats; --timings without an argument will default to --timings=html. Specifying an output format (rather than the default) is unstable and requires -Zunstable-options. Valid output formats:

        • html (unstable, requires -Zunstable-options): Write a human-readable file cargo-timing.html to the target/cargo-timings directory with a report of the compilation. Also write a report to the same directory with a timestamp in the filename if you want to look at older runs. HTML output is suitable for human consumption only, and does not provide machine-readable timing data.

        • json (unstable, requires -Zunstable-options): Emit machine-readable JSON information about timing information.

  Output Options

--target-dir directory
    Directory for all generated artifacts and intermediate files. May also be specified with the CARGO_TARGET_DIR environment variable, or the build.target-dir config value <https://doc.rust-lang.org/cargo/reference/config.html>. Defaults to target in the root of the workspace.

  Display Options

-v, --verbose
    Use verbose output. May be specified twice for “very verbose” output which includes extra output such as dependency warnings and build script output. May also be specified with the term.verbose config value <https://doc.rust-lang.org/cargo/reference/config.html>.

-q, --quiet
    Do not print cargo log messages. May also be specified with the term.quiet config value <https://doc.rust-lang.org/cargo/reference/config.html>.

--color when
    Control when colored output is used. Valid values:

        • auto (default): Automatically detect if color support is available on the terminal.

        • always: Always display colors.

        • never: Never display colors.

    May also be specified with the term.color config value <https://doc.rust-lang.org/cargo/reference/config.html>.

--message-format fmt
    The output format for diagnostic messages. Can be specified multiple times and consists of comma-separated values. Valid values:

        • human (default): Display in a human-readable text format. Conflicts with short and json.

        • short: Emit shorter, human-readable text messages. Conflicts with human and json.

        • json: Emit JSON messages to stdout. See the reference <https://doc.rust-lang.org/cargo/reference/external-tools.html#json-messages> for more details. Conflicts with human and short.

        • json-diagnostic-short: Ensure the rendered field of JSON messages contains the “short” rendering from rustc. Cannot be used with human or short.

        • json-diagnostic-rendered-ansi: Ensure the rendered field of JSON messages contains embedded ANSI color codes for respecting rustc’s default color scheme. Cannot be used with human or short.

        • json-render-diagnostics: Instruct Cargo to not include rustc diagnostics in JSON messages printed, but instead Cargo itself should render the JSON diagnostics coming from rustc. Cargo’s own JSON diagnostics and others coming from rustc are still emitted. Cannot be used with human or short.

  Manifest Options

--manifest-path path
    Path to the Cargo.toml file. By default, Cargo searches for the Cargo.toml file in the current directory or any parent directory.

--ignore-rust-version
    Ignore rust-version specification in packages.

--locked
    Asserts that the exact same dependencies and versions are used as when the existing Cargo.lock file was originally generated. Cargo will exit with an error when either of the following scenarios arises:

        • The lock file is missing.

        • Cargo attempted to change the lock file due to a different dependency resolution.

    It may be used in environments where deterministic builds are desired, such as in CI pipelines.

--offline
    Prevents Cargo from accessing the network for any reason. Without this flag, Cargo will stop with an error if it needs to access the network and the network is not available. With this flag, Cargo will attempt to proceed without the network if possible.

    Beware that this may result in different dependency resolution than online mode. Cargo will restrict itself to crates that are downloaded locally, even if there might be a newer version as indicated in the local copy of the index. See the cargo-fetch(1) command to download dependencies before going offline.

    May also be specified with the net.offline config value <https://doc.rust-lang.org/cargo/reference/config.html>.

--frozen
    Equivalent to specifying both --locked and --offline.

--lockfile-path PATH
    Changes the path of the lockfile from the default (<workspace_root>/Cargo.lock) to PATH. PATH must end with Cargo.lock (e.g. --lockfile-path /tmp/temporary-lockfile/Cargo.lock). Note that providing --lockfile-path will ignore existing lockfile at the default path, and instead will either use the lockfile from PATH, or write a new lockfile into the provided PATH if it doesn’t exist. This flag can be used to run most commands in read-only directories, writing lockfile into the provided PATH.

    This option is only available on the nightly channel <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html> and requires the -Z unstable-options flag to enable (see #14421 <https://github.com/rust-lang/cargo/issues/14421>).

  Common Options

+toolchain
    If Cargo has been installed with rustup, and the first argument to cargo begins with +, it will be interpreted as a rustup toolchain name (such as +stable or +nightly). See the rustup documentation <https://rust-lang.github.io/rustup/overrides.html> for more information about how toolchain overrides work.

--config KEY=VALUE or PATH
    Overrides a Cargo configuration value. The argument should be in TOML syntax of KEY=VALUE, or provided as a path to an extra configuration file. This flag may be specified multiple times. See the command-line overrides section <https://doc.rust-lang.org/cargo/reference/config.html#command-line-overrides> for more information.

-C PATH
    Changes the current working directory before executing any specified operations. This affects things like where cargo looks by default for the project manifest (Cargo.toml), as well as the directories searched for discovering .cargo/config.toml, for example. This option must appear before the command name, for example cargo -C path/to/my-project build.

    This option is only available on the nightly channel <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html> and requires the -Z unstable-options flag to enable (see #10098 <https://github.com/rust-lang/cargo/issues/10098>).

-h, --help
    Prints help information.

-Z flag
    Unstable (nightly-only) flags to Cargo. Run cargo -Z help for details.

  Miscellaneous Options

-j N, --jobs N
    Number of parallel jobs to run. May also be specified with the build.jobs config value <https://doc.rust-lang.org/cargo/reference/config.html>. Defaults to the number of logical CPUs. If negative, it sets the maximum number of parallel jobs to the number of logical CPUs plus provided value. If a string default is provided, it sets the value back to defaults. Should not be 0.

--keep-going
    Build as many crates in the dependency graph as possible, rather than aborting the build on the first one that fails to build.

    For example if the current package depends on dependencies fails and works, one of which fails to build, cargo rustdoc -j1 may or may not build the one that succeeds (depending on which one of the two builds Cargo picked to run first), whereas cargo rustdoc -j1 --keep-going would definitely run both builds, even if the one run first fails.

--output-format
    The output type for the documentation emitted. Valid values:

        • html (default): Emit the documentation in HTML format.

        • json: Emit the documentation in the experimental JSON format <https://doc.rust-lang.org/nightly/nightly-rustc/rustdoc_json_types>.

    This option is only available on the nightly channel <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html> and requires the -Z unstable-options flag to enable.

ENVIRONMENT
See the reference <https://doc.rust-lang.org/cargo/reference/environment-variables.html> for details on environment variables that Cargo reads.

EXIT STATUS

    • 0: Cargo succeeded.

    • 101: Cargo failed to complete.

EXAMPLES

    1. Build documentation with custom CSS included from a given file:

        cargo rustdoc --lib -- --extend-css extra.css

SEE ALSO
cargo(1), cargo-doc(1), rustdoc(1)