The first patch adds the commitsigs extension for Mercurial, it allows users to sign Mercurial changesets (equivalent to Git commits) with GnuPG or OpenSSL.
The second patch adds PYTHONPATH to the ‘native-search-paths’ field of Mercurial, this allows Mercurial to automatically find third-party extensions (like commitsigs) installed in /gnu/store/...-profile/lib/python3.8/site-packages/hgext3rd. By default, it only looks at /gnu/store/...-mercurial/lib/python3.8/site-packages/hgext3rd. However, I am not sure this is the best approach since it messes with PYTHONPATH, AFAIK there is no such things as a HGEXTENSIONS variable I could set. Another problem is that I have to hardcode “python3.8”, this would obviously have to be updated if the default Python version gets updated. I did try to do something like this: #+begin_src scheme (string-append "lib/python" (string-join (drop-right (string-split (package-version python) #\.) 1) ".") "/site-packages/hgext3rd") #+end_src but it just gave me a confusing error message when trying to build it; it worked fine if I hit {C-x C-e} in Emacs, though. What we could do instead is to delegate the work of installing Mercurial extensions to Guix Home[1] (I am currently working on adding a service for Mercurial[2]) and add a ‘mercurial-extension-file-path’ key to the ‘properties’ field of Mercurial extensions so Guix Home can tell Mercurial where to find the extension by the relevant lines in hgrc. We could have a package definition like this: #+begin_src scheme (package (name "mercurial-commitsigs") ... (properties '((mercurial-extension-file-path . "commitsigs.py")))) #+end_src hgrc: #+begin_src [extensions] commitsigs = /gnu/store/...-mercurial-commitsigs/commitsigs.py #+end_src [1]: https://yhetil.org/guix-devel/878s6u2pco....@trop.in/ [2]: https://lists.sr.ht/~abcdw/rde-devel/patches/22421 Xinglu Chen (2): gnu: Add mercurial-commitsigs. gnu: mercurial: Add PYTHONPATH to ‘native-search-paths’. gnu/packages/version-control.scm | 68 ++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) base-commit: aa7eeabe9a782afc2535581298990050d16b1895 -- 2.31.1