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scribble/llncs fails to download llncs.cls #383

Open fare opened 12 months ago

fare commented 12 months ago

The Springer ftp server doesn't exist anymore. llncs is now at 2.23 not 2.20 anymore.

The page https://www.springer.com/gp/computer-science/lncs/conference-proceedings-guidelines has a link "LaTeX2e Proceedings Templates download " which points to https://resource-cms.springernature.com/springer-cms/rest/v1/content/19238648/data/v7 which resolves to a zip file that contains llncs 2.23.

There's also a copy on CTAN https://ctan.org/pkg/llncs that mentions a CC BY 4.0 license, and that might (or not) provide more stable URLs to download present and older versions from.

fare commented 12 months ago

Also, it is probably poor form to store an unversioned copy of the file in ~/.racket/llncs.cls — what if a version incompatibility were introduced at some point? scribble/llncs probably needs to ascertain that it's using a compatible version.

samth commented 12 months ago

The relevant CTAN link seems to be http://mirrors.ctan.org/macros/latex/contrib/llncs/llncs.cls

fare commented 12 months ago

If the license is compatible, I'd suggest including the cls file in the racket/scribble git repository, or a separate repository (if needed for license reasons) that can used as a submodule or stable place to download from.

fare commented 12 months ago

xref: https://racket.discourse.group/t/llncs-out-of-date/2558 (pointed me to here as the right place to report a bug).

racket-discourse-github-bot commented 12 months ago

This issue has been mentioned on Racket Discourse. There might be relevant details there:

https://racket.discourse.group/t/llncs-out-of-date/2558/4

LiberalArtist commented 12 months ago

It looks like the LaTeX class was originally released under a non-free license, but at some point (after 2013, but at least by 2022) was re-licensed by Springer to CC-BY-4.0. Racket can definitely distribute CC-BY-4.0 code, and using the CC-BY-4.0 will avoid a potential issue for downstream packagers with especially zealous license policies, too.

It seems like it could be reasonable to either:

  1. Expect users to install llncs via their (2022 or later) TeX distribution; or
  2. Distribute it with the scribble-lib package, as is already done for sigplanconf.cls and acmart.cls.

If adding llncs.cls, be sure to also add its license here!

https://github.com/racket/scribble/blob/f7f51ebffdffde36f306ab236676d075d9e28207/scribble-lib/info.rkt#L28-L35