= cargo-metadata(1)
:idprefix: cargo_metadata_
:doctype: manpage
:source-highlighter: highlightjs
== NAME
cargo-metadata - Machine-readable metadata about the current package
== SYNOPSIS
`cargo metadata [_OPTIONS_]`
== DESCRIPTION
Output the resolved dependencies of a package, the concrete used versions
including overrides, in JSON to stdout.
It is recommended to include the `--format-version` flag to future-proof
your code to ensure the output is in the format you are expecting.
See the link:https://crates.io/crates/cargo_metadata[cargo_metadata crate]
for a Rust API for reading the metadata.
== OUTPUT FORMAT
The output has the following format:
[source,javascript]
----
{
/* Array of all packages in the workspace.
It also includes all feature-enabled dependencies unless --no-deps is used.
*/
"packages": [
{
/* The name of the package. */
"name": "my-package",
/* The version of the package. */
"version": "0.1.0",
/* The Package ID, a unique identifier for referring to the package. */
"id": "my-package 0.1.0 (path+file:///path/to/my-package)",
/* The license value from the manifest, or null. */
"license": "MIT/Apache-2.0",
/* The license-file value from the manifest, or null. */
"license_file": "LICENSE",
/* The description value from the manifest, or null. */
"description": "Package description.",
/* The source ID of the package. This represents where
a package is retrieved from.
This is null for path dependencies and workspace members.
For other dependencies, it is a string with the format:
- "registry+URL" for registry-based dependencies.
Example: "registry+https://github.com/rust-lang/crates.io-index"
- "git+URL" for git-based dependencies.
Example: "git+https://github.com/rust-lang/cargo?rev=5e85ba14aaa20f8133863373404cb0af69eeef2c#5e85ba14aaa20f8133863373404cb0af69eeef2c"
*/
"source": null,
/* Array of dependencies declared in the package's manifest. */
"dependencies": [
{
/* The name of the dependency. */
"name": "bitflags",
/* The source ID of the dependency. May be null, see
description for the package source.
*/
"source": "registry+https://github.com/rust-lang/crates.io-index",
/* The version requirement for the dependency.
Dependencies without a version requirement have a value of "*".
*/
"req": "^1.0",
/* The dependency kind.
"dev", "build", or null for a normal dependency.
*/
"kind": null,
/* If the dependency is renamed, this is the new name for
the dependency as a string. null if it is not renamed.
*/
"rename": null,
/* Boolean of whether or not this is an optional dependency. */
"optional": false,
/* Boolean of whether or not default features are enabled. */
"uses_default_features": true,
/* Array of features enabled. */
"features": [],
/* The target platform for the dependency.
null if not a target dependency.
*/
"target": "cfg(windows)",
/* A string of the URL of the registry this dependency is from.
If not specified or null, the dependency is from the default
registry (crates.io).
*/
"registry": null
}
],
/* Array of Cargo targets. */
"targets": [
{
/* Array of target kinds.
- lib targets list the `crate-type` values from the
manifest such as "lib", "rlib", "dylib",
"proc-macro", etc. (default ["lib"])
- binary is ["bin"]
- example is ["example"]
- integration test is ["test"]
- benchmark is ["bench"]
- build script is ["custom-build"]
*/
"kind": [
"bin"
],
/* Array of crate types.
- lib and example libraries list the `crate-type` values
from the manifest such as "lib", "rlib", "dylib",
"proc-macro", etc. (default ["lib"])
- all other target kinds are ["bin"]
*/
"crate_types": [
"bin"
],
/* The name of the target. */
"name": "my-package",
/* Absolute path to the root source file of the target. */
"src_path": "/path/to/my-package/src/main.rs",
/* The Rust edition of the target.
Defaults to the package edition.
*/
"edition": "2018",
/* Array of required features.
This property is not included if no required features are set.
*/
"required-features": ["feat1"],
/* Whether or not this target has doc tests enabled, and
the target is compatible with doc testing.
*/
"doctest": false
}
],
/* Set of features defined for the package.
Each feature maps to an array of features or dependencies it
enables.
*/
"features": {
"default": [
"feat1"
],
"feat1": [],
"feat2": []
},
/* Absolute path to this package's manifest. */
"manifest_path": "/path/to/my-package/Cargo.toml",
/* Package metadata.
This is null if no metadata is specified.
*/
"metadata": {
"docs": {
"rs": {
"all-features": true
}
}
},
/* List of registries to which this package may be published.
Publishing is unrestricted if null, and forbidden if an empty array. */
"publish": [
"crates-io"
],
/* Array of authors from the manifest.
Empty array if no authors specified.
*/
"authors": [
"Jane Doe <user@example.com>"
],
/* Array of categories from the manifest. */
"categories": [
"command-line-utilities"
],
/* Array of keywords from the manifest. */
"keywords": [
"cli"
],
/* The readme value from the manifest or null if not specified. */
"readme": "README.md",
/* The repository value from the manifest or null if not specified. */
"repository": "https://github.com/rust-lang/cargo",
/* The default edition of the package.
Note that individual targets may have different editions.
*/
"edition": "2018",
/* Optional string that is the name of a native library the package
is linking to.
*/
"links": null,
}
],
/* Array of members of the workspace.
Each entry is the Package ID for the package.
*/
"workspace_members": [
"my-package 0.1.0 (path+file:///path/to/my-package)",
],
/* The resolved dependency graph, with the concrete versions and features
selected. The set depends on the enabled features.
This is null if --no-deps is specified.
*/
"resolve": {
/* Array of nodes within the dependency graph.
Each node is a package.
*/
"nodes": [
{
/* The Package ID of this node. */
"id": "my-package 0.1.0 (path+file:///path/to/my-package)",
/* The dependencies of this package, an array of Package IDs. */
"dependencies": [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)"
],
/* The dependencies of this package. This is an alternative to
"dependencies" which contains additional information. In
particular, this handles renamed dependencies.
*/
"deps": [
{
/* The name of the dependency's library target.
If this is a renamed dependency, this is the new
name.
*/
"name": "bitflags",
/* The Package ID of the dependency. */
"pkg": "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)"
}
],
/* Array of features enabled on this package. */
"features": [
"default"
]
}
],
/* The root package of the workspace.
This is null if this is a virtual workspace. Otherwise it is
the Package ID of the root package.
*/
"root": "my-package 0.1.0 (path+file:///path/to/my-package)"
},
/* The absolute path to the build directory where Cargo places its output. */
"target_directory": "/path/to/my-package/target",
/* The version of the schema for this metadata structure.
This will be changed if incompatible changes are ever made.
*/
"version": 1,
/* The absolute path to the root of the workspace. */
"workspace_root": "/path/to/my-package"
}
----
== OPTIONS
=== Output Options
*--no-deps*::
Output information only about the workspace members and don't fetch
dependencies.
*--format-version* _VERSION_::
Specify the version of the output format to use. Currently `1` is the only
possible value.
include::options-features.adoc[]
=== Display Options
include::options-display.adoc[]
=== Manifest Options
include::options-manifest-path.adoc[]
include::options-locked.adoc[]
=== Common Options
include::options-common.adoc[]
include::section-environment.adoc[]
include::section-exit-status.adoc[]
== EXAMPLES
. Output JSON about the current package:
cargo metadata --format-version=1
== SEE ALSO
man:cargo[1]