implement preferred-citation to a book

[bueler]

My repo https://github.com/bueler/p4pdes supports a book. (Very old fashioned, I know.) I would like users of the software to cite the book. So the preferred-citation mechanism seems good. But it produces an incomplete book citation. In particular, my attempt below produced an APA and bibtex citation which did not have the publisher or address. Ideally there would be an ISBN too. (So I reverted to having CITATION.bib in the repo, which is the way the master branch looks now.)

Is a CFF extension needed? If so, where should the issue go?

Thanks!

cff-version: 1.2.0
message: "If you use this software, please cite my book below."
authors:
- family-names: "Bueler"
  given-names: "Ed"
title: "PETSc for Partial Differential Equations: Numerical Solutions in C and Python"
date-released: 2021
url: "https://github.com/bueler/p4pdes"
preferred-citation:
  type: book
  authors:
  - family-names: "Bueler"
    given-names: "Ed"
  title: "PETSc for Partial Differential Equations: Numerical Solutions in C and Python"
  publisher: SIAM Press
  address: Philadelphia
  url: "https://github.com/bueler/p4pdes"
  isbn: 9781611976304
  year: 2021

[arfon]

Is a CFF extension needed? If so, where should the issue go?

No extensions is needed, we just need to support the book type here in the gem. Note this may (in part) be accomplished by #67 and the more general adoption of standard citations styles.

[hainesr]

I think this is related to #75. We don't have comprehensive conversion for all the different types of publication out there yet. As @arfon says, this may not even be possible without something like #67 - but I am looking into it in the meantime.

[hainesr]

ruby-cff now supports @book for BibTeX output. Please let me know in a new issue if there are any problems with it!

[arfon]

...and this is now live on GitHub. Any issues, let me know!