Use SPDX license identifier

[cdce8p]

PEP 639 recommends the use of SPDX license identifiers.

At the moment the license key is ignored by flit, see pypa/flit#525. However, it's still possible to replace it now. Once the support in flit is added, the value will be used automatically.

At some point, the table will need be be changed to just a string for full PEP 639 compliance. That requires support for it first though. The change is also pretty simple.

-license = {text = "BSD-3-Clause"}
+license = "BSD-3-Clause"

--
Before the move to pyproject.toml, setup.cfg used BSD-3-Clause as well. https://github.com/pallets/click/blob/8.1.7/setup.cfg#L12

[Rowlando13]

Looks like license is a modified BSD-3 so I am not sure this is correct. @davidism thoughts?

[cdce8p]

Looks like license is a modified BSD-3 so I am not sure this is correct. @davidism thoughts?

Can you explain what specifically you mean? Github recognizes it correctly as the BSD-3-Clause license.
https://github.com/pallets/click/blob/main/LICENSE.txt
https://spdx.org/licenses/BSD-3-Clause.html

[davidism]

It's not modified, should be standard BSD-3-Clause.

[davidism]

I'm going to close this for now. Once Flit supports license = "string" and license_files = [...], you're welcome to create a PR for that.