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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased - ReleaseDate

0.13.4 - 2026-02-26

Changed

0.13.3 - 2025-12-17

Changed

  • PR#90 changed this crate to default to no_std, unless the detection feature is enabled, closing PR#89. Thanks @so-rose!
  • PR#91 changed the license terms from MIT OR Apache2.0 to just Apache-2.0, as PR#84 merged external code that was only licensed under Apache-2.0. See #88 for the original raising of this mismatch.

0.13.2 - 2025-12-04

Fixed

  • PR#87 fixed a code generation bug introduced in PR#86 that caused LicenseId::text() to return the incorrect license text.

0.13.1 - 2025-12-03

Changed

  • PR#86 changes the license detection for GNU licenses (GPL, AGPL, LGPL, GFDL). In 0.13.0 they would be detected as their deprecated (eg. AGPL-3.0) variant due to the variants (root, -only, and -or-later) using the exact same license text. GNU licenses are now detected as the <root>-or-later version. This is an arbitrary decision, which I hope to not change, but if someone makes a convincing argument it could be.

0.13.0 - 2025-12-02

Added

  • PR#84 resolved #67 by inlining the askalono crate to allow detection of license texts or headers from arbitrary text data. There are multiple features flags associated with this new feature.
  • PR#85 resolved #82 by optionally allowing the parsing of unknown identifiers via ParseMode::allow_unknown. Unknown identifiers are either treated as LicenseRef-<unknown identifier> or AdditionRef-<unknown identifier> depending on their position. Unknown identifiers on positions that are invalid for either licenses or exceptions are still considered parse errors.

0.12.0 - 2025-08-19

Added

  • PR#81 resolved #68 by adding support for the WITH [%s"DocumentRef-"(idstring)":"]%s"AdditionRef-"(idstring) syntax. Thanks @weihanglo!

0.11.1 - 2025-08-11

Changed

  • PR#80 changed how Licensee::satisfies works for GNU licenses again, it now requires that the license ids match exactly. This is incredibly pedantic but means it's up to consumers if the want to have a smarter comparison, I just don't want to have to care about GNU licenses, ever.

Fixed

  • PR#80 reverted a change introduced in PR#78 that would auto-fixup GNU licenses to their non-deprecated forms eg. GPL-2.0 => GPL-2.0-only. This is no longer done, resolving #79.

0.11.0 - 2025-08-08

Changed

  • PR#78 removed ParseMode::allow_lower_case_operators, newer revisions of the SPDX spec allow all lower-case operators, making the option pointless.
  • PR#78 added ParseMode::allow_deprecated, which will cause an error if a deprecated license identifier is used, false in LAX and true in STRICT.
  • PR#78 changed the various imprecise names for GPL licenses to be mapped to the non-deprecated -only versions.
  • PR#78 Expression::canonicalize now always changes GNU licenses to be -only or -or-later as the bare identifiers are deprecated.

Added

  • PR#78 added LicenseId::version to retrieve the numeric version of the license if it has one.
  • PR#78 added LicenseId::base to retrieve the base name of the license.
  • PR#78 added gnu_license_id which attempts to retrieve the license id for a GNU license from its base identifier. This retrieves the -only or -or-later license that matches.
  • PR#78 added Licensee::parse_mode, Licensee::parse now forwards to that function with ParseMode::STRICT.
  • PR#78 added Reason::GnuPlusWithSuffix and Reason::DeprecatedLicenseId as errors.

Fixed

  • PR#78 fixed an issue where Licensee::satisfies would not properly allow some licenses if the version was not at the end when using a +, notably the BSD licenses have the version in the middle of the license id.
  • PR#78 fixed the handling of GNU licenses in Licensee::satisfies, at least to my best understanding.
    Licensee GPL-1.0-only GPL-1.0-or-later GPL-2.0-only GPL-2.0-or-later GPL-3.0-only GPL-3.0-or-later
    GPL-1.0-only ✅ ✅ ❌ ❌ ❌ ❌
    GPL-1.0-or-later ✅ ✅ ❌ ❌ ❌ ❌
    GPL-2.0-only ❌ ✅ ✅ ✅ ❌ ❌
    GPL-2.0-or-later ❌ ✅ ✅ ✅ ❌ ❌
    GPL-3.0-only ❌ ✅ ❌ ✅ ✅ ✅
    GPL-3.0-or-later ❌ ✅ ❌ ✅ ✅ ✅

0.10.9 - 2025-07-12

Changed

  • PR#74 update SPDX license list to 3.27.0.

0.10.8 - 2024-12-31

Changed

  • PR#74 update SPDX license list to 3.26.0.

0.10.7 - 2024-11-15

Changed

  • PR#72 update SPDX license list to 3.25.0.

0.10.6 - 2024-05-31

Changed

  • PR#70 update SPDX license list to 3.24.0.

0.10.4 - 2024-02-26

Changed

  • PR#65 update SPDX license list to 3.23.

0.10.3 - 2024-01-04

Changed

  • PR#63 update SPDX license list to 3.22.

Added

  • PR#64 resolved #56 by adding Expression::canonicalize which fixes otherwise valid expressions into a form parsable with ParseMode::STRICT

0.10.2 - 2023-07-14

Changed

  • PR#61 updated the SPDX license list from 3.20 => 3.21.

Fixed

  • PR#60 fixed a few typos.

0.10.1 - 2023-04-06

Changed

  • PR#59 updated the SPDX license list from 3.19 => 3.20.

0.10.0 - 2022-12-20

Changed

  • PR#57 updated the SPDX license list from 3.18 => 3.19.

0.9.0 - 2022-08-25

Changed

  • PR#55 updated the SPDX license list from 3.14 => 3.18.

0.8.1 - 2022-02-04

Changed

  • PR#51 updates the crates.io metadata for the crate.

0.8.0 - 2021-12-21

Changed

  • PR#50 changed ParseMode to be a struct with several fields to give finer grained control over which parts of expression parsing/evaluation can be relaxed. Thanks @Turbo87!

0.7.0 - 2021-11-23

Changed

  • PR#48 resolved #45 by making the original error string owned in the case of a parse error, simplifying the handling of errors. Thanks @hoijui!
  • PR#49 bumped the MSRV to 1.56.1, as well as moving to the 2021 edition and setting the rust-version there.

0.6.2 - 2021-10-21

Fixed

  • PR#44 fixed the Display for various GNU licenses, since they are "special" and diverge from the SPDX spec for reasons. Thanks @mmurto!

Added

  • PR#43 added the text feature flag, which includes the full license and exception texts. They can be retrieved via LicenseId::text and ExceptionId::text respectively.
  • PR#43 added the Expression::minimized_requirements method which allows a set of potential licensees be reduced down to the minimum possible requirements for an expression.

0.6.1 - 2021-10-04

Added

  • PR#41 added a NOASSERTION license. Hopefully this will become part of spec in the future.

0.6.0 - 2021-08-16

Changed

  • PR#40 updated the SPDX license list from 3.11 => 3.14.

Fixed

  • PR#40 resolved #39 by taking the GFDL exceptional differences from all other licenses (include the other GNU ones) into account.

0.5.0 - 2021-07-20

Changed

  • PR#38 fixed various clippy lints which also bumps the MSRV to 1.53.0. Previously, PR#37 had bumped the MSRV to 1.52 so now this crate will check the MSRV so changes are intentional.
  • PR#38 replaced the unmaintained difference crate with similar-asserts.

0.4.1 - 2021-06-14

Changed

  • PR#37 removed the dependencies on regex and lazy_static used for parsing some license expression parts, which gives a nice compile speed up with no behavior changes. Thanks @Swagadon!

0.4.0 - 2021-03-26

Changed

  • Renamed LicenseItem::SPDX => LicenseItem::Spdx and Token::SPDX => Token::Spdx.

0.3.6 - 2021-02-12

Changed

  • Updated to version 3.11 of the SPDX license list

0.3.5 - 2021-02-12

Fixed

0.3.4 - 2020-03-04

Added

  • Added Expression::iter() which iterates over both the license requirements and the operators.

0.3.3 - 2020-02-29

Changed

  • Updated to version 3.8 of the SPDX license list

0.3.2 - 2020-01-29

Changed

  • PR#19 added the #[non_exhaustive] attribute to the new ParseMode enum, which bumped the minimum required Rust version to use this crate to 1.40. PR#21 removed this attribute as that enum is primarily an input for this crate, and had little benefit.

0.3.1 - 2020-01-28 (yanked)

Added

  • PR#19 Added ParseMode enum, which has a Lax variant that allows certain invalid license identifiers found in some crates on crates.io, as well as the invalid / expression separator. Thanks @kornel!

0.3.0 - 2019-12-14

Added

  • Added LicenseId::is_gnu to indicate the GNU licenses (GPL, AGPL, LGPL, GFDL), which use a different suffix format than all other licenses
  • std::error::Error is now (properly) implemented for error::ParseError
  • LicenseReq not implements From<LicenseId>

Changed

  • Lexer and Token can now be reached via the lexer module
  • parser and expression are no longer part of the public API
  • IS_COPYLEFT, IS_DEPRECATED, IS_FSF_LIBRE, and IS_OSI_APPROVED are no longer part of the public API
  • The GFDL* licenses are now marked as copyleft

Fixed

  • When creating a LicenseReq from a GNU license, the license identifier is converted into its base form, eg. GPL-2.0-or-later becomes GPL-2.0+ so that the GNU style license identifiers can be used just the same as all of the other ones. See this issue

0.2.4 - 2019-11-25

Added

  • Impl Display for Licensee

0.2.3 - 2019-11-07

Changed

  • Updated the list of licenses to version 3.7 of the SPDX license list

0.2.2 - 2019-11-06

Added

  • Added LicenseId::full_name which is the full name for the license, eg "MIT License" for the "MIT" short identifier

0.2.1 - 2019-10-21

Added

0.2.0 - 2019-10-03

Added

  • Added a Expression which can parse and validate an SPDX license expression is both syntactically and semantically correct, as well as evaluate the expression via a user provided callback
  • Added an update exe for pulling new SPDX information, copied from https://github.com/rust-lang-nursery/license-exprs
  • Added support for some of the metadata available from the SPDX format, namely "IsDeprecated", "IsFSFLibre", and "IsOSIApproved"

Changed

  • Uhm...everything. I hope no one was using 0.1.0.
  • Use a better lexer, mostly copied from ehuss/license-exprs#29

0.1.0 - 2019-09-02

Added