license

SPDX license identifiers and expressions: look a license up, parse MIT OR Apache-2.0, check it against a policy, write a source header.

lookup gives the name and family (Category) of about forty common licenses, normalize updates the deprecated GNU identifiers, Expression parses and evaluates SPDX expressions, and header writes the copyright and SPDX-License-Identifier lines. This is information for tooling, not legal advice.

Install

Cargo feature license (enabled by default). To compile only this module:

cargo add helpers4 --no-default-features --features license

or in Cargo.toml:

[dependencies]
helpers4 = { version = "0.0.6", default-features = false, features = ["license"] }

Import path: helpers4::license.

Items

Item	What it does
Category	How a license treats the code that uses it: the main families, from most to least permissive.
Expression	An SPDX license expression: one license, or several combined with AND and OR.
header	The two-line source header that carries a copyright notice and an SPDX license identifier.
LicenseInfo	What is known about one license: its SPDX identifier, its name and its family.
lookup	What this module knows about the license with SPDX identifier id.
normalize	The current SPDX identifier for a deprecated one.

Error types

Documented on the page of the helper that returns them.

Type	Returned by
ParseExpressionError	Expression