doc - The Cargo Book

NAME

cargo-doc - Build a package's documentation

SYNOPSIS

cargo doc [OPTIONS]

DESCRIPTION

Build the documentation for the local package and all dependencies. The output is placed in target/doc in rustdoc’s usual format.

OPTIONS

Documentation Options

--open: Open the docs in a browser after building them.
--no-deps: Do not build documentation for dependencies.
--document-private-items: Include non-public items in the documentation.

Package Selection

By default, when no package selection options are given, the packages selected depend on the current working directory. In the root of a virtual workspace, all workspace members are selected (--all is implied). Otherwise, only the package in the current directory will be selected. The default packages may be overridden with the workspace.default-members key in the root Cargo.toml manifest.

-p SPEC…
--package SPEC…: Document only the specified packages. See cargo-pkgid(1) for the SPEC format. This flag may be specified multiple times.
--all: Document all members in the workspace.
--exclude SPEC…: Exclude the specified packages. Must be used in conjunction with the --all flag. This flag may be specified multiple times.

Target Selection

When no target selection options are given, cargo doc 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.

The default behavior can be changed by setting doc = false for the target in the manifest settings. Using target selection options will ignore the doc flag and will always document the given target.

--lib: Document the package’s library.
--bin NAME…: Document the specified binary. This flag may be specified multiple times.
--bins: Document all binary targets.

Feature Selection

When no feature options are given, the default feature is activated for every selected package.

--features FEATURES: Space or comma separated list of features to activate. These features only apply to the current directory’s package. Features of direct dependencies may be enabled with <dep-name>/<feature-name> syntax.
--all-features: Activate all available features of all selected packages.
--no-default-features: Do not activate the default feature of the current directory’s package.

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 may also be specified with the build.target config value.
--release: Document optimized artifacts with the release profile. See the PROFILES section for details on how this affects profile selection.

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. 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.

-q

--quiet

No output printed to stdout.

--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.

--message-format FMT

The output format for diagnostic messages. Valid values:

human (default): Display in a human-readable text format.
json: Emit JSON messages to stdout.
short: Emit shorter, human-readable text messages.

Manifest Options

--manifest-path PATH: Path to the Cargo.toml file. By default, Cargo searches in the current directory or any parent directory for the Cargo.toml file.
--frozen
--locked: Either of these flags requires that the Cargo.lock file is up-to-date. If the lock file is missing, or it needs to be updated, Cargo will exit with an error. The --frozen flag also prevents Cargo from attempting to access the network to determine if it is out-of-date.

These may be used in environments where you want to assert that the Cargo.lock file is up-to-date (such as a CI build) or want to avoid network access.
--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.

Common Options

-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. Defaults to the number of CPUs.

PROFILES

Profiles may be used to configure compiler options such as optimization levels and debug settings. See the reference for more details.

Profile selection depends on the target and crate being built. By default the dev or test profiles are used. If the --release flag is given, then the release or bench profiles are used.

Target Default Profile --release Profile

Target	Default Profile	`--release` Profile
lib, bin, example	`dev`	`release`
test, bench, or any target in "test" or "bench" mode	`test`	`bench`

lib, bin, example

dev

release

test, bench, or any target
in "test" or "bench" mode

test

bench

Dependencies use the dev/release profiles.

ENVIRONMENT

See the reference for details on environment variables that Cargo reads.

Exit Status

0: Cargo succeeded.
101: Cargo failed to complete.

EXAMPLES

Build the local package documentation and its dependencies and output to target/doc.
```
cargo doc
```

The Cargo Book

cargo doc