📜 cargo-about

Cargo plugin for generating a listing of all of the crates used by a root crate, and the terms under which they are licensed.

Please Note: This is a tool that we use (and like!) and it makes sense to us to release it as open source. However, we can’t take any responsibility for your use of the tool, if it will function correctly or fulfil your needs. No functionality in - or information provided by - cargo-about constitutes legal advice.

Getting started

Installing

From crates.io

cargo install cargo-about

From the AUR

Arch Linux users can install cargo-about from the AUR using an AUR helper. For example,

paru -S cargo-about

Generate license information for your own project

# Generates `about.toml` and `about.hbs` in your cargo project
cargo about init
# Generate the license information with
cargo about generate about.hbs > license.html

about.toml

[accepted]

Priority list of all the accepted licenses for a project.

cargo-about

accepted = [
    "Apache-2.0",
    "MIT",
]

[targets]

A list of targets that are actually building for. Crates which are only included via

cfg()

targets = [
    "x86_64-unknown-linux-gnu",
    "x86_64-unknown-linux-musl",
    "x86_64-pc-windows-msvc",
    "x86_64-apple-darwin",
]

ignore-build-dependencies

If true, all crates that are only used as build dependencies will be ignored.

ignore-build-dependencies = true

ignore-dev-dependencies

If true, all crates that are only used as dev dependencies will be ignored.

ignore-dev-dependencies = true

[[DEPENDENCY.additional]]

• root

  Name of the root folder

• license

  Name of the license. Has to be parsable from SPDX, see https://spdx.org/licenses/

• license-file

  The path to the license file where the license is specified

• license-start

  The starting line number of the license in the specified license file

• license-end

  The ending line number of the license in the specified license file

# Example
[[physx-sys.additional]]
root = "PhysX"
license = "BSD-3-Clause"
license-file = "PhysX/README.md"
license-start = 3
license-end = 28

[[DEPENDENCY.ignore]]

Sometimes libraries include licenses for example code that you don't want to use.

• license

  Name of the license that you want to ingore. Has to be parsable from SPDX, see https://spdx.org/licenses/

• license-file

  The path to the license file where the license is specified

[[imgui-sys.ignore]]
license = "Zlib"
license-file = "third-party/cimgui/imgui/examples/libs/glfw/COPYING.txt"

about.hbs

See handlebars

Variables

• overview

  A list of

  LicenseSet

• licenses

  A list of

  License

Types

LicenseSet

• count

  The number of times the license is used

• name

  The name of the license

• id

  The

  id

  of the license

License

• name

  The full name of the license

• id

  The SPDX identifier

• text

  The license text

• source_path

  The path of the license

• used_by

  A list of

  UsedBy

UsedBy

• crate

  Metadata for a cargo package

• path

  Optional path of the dependency that is being used by the license

Example

{{#each overview}}
• {{name}} ({{count}})
{{/each}}

Preview of the default

about.hbs

You can view the full license here

FAQ

Unable to satisfy the following licenses

[ERROR] Crate 'aho-corasick': Unable to satisfy [Unlicense OR MIT], with the following accepted licenses [Apache-2.0]

In this case you are missing either

MIT

Unlicense

accepted

about.toml

Contributing

We welcome community contributions to this project.

Please read our Contributor Guide for more information on how to get started.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.