Guix packaging tutorial with hand holding

[白い熊 <help-guix_gnu.org@sumou.com>]

Hi Guix:

I'd like to advance step-by-step in learning how to write package definitions with the eventual goal of contributing to Guix.

For this I'd like to ask if someone could help me and other Guix-hacking-packaging beginners with some hand holding — concrete though, with examples, so I could then proceed through trial and error.

I've tried to follow the Guix packaging tutorial guide [1]. I can build and install the sample my-hello package with the from-file approach.

Next, I'd like to build and install the sample my-libgit2 package. Here, however I can't proceed:

The tutorial is old so it mentions the “GUIX_PACKAGE_PATH” approach which is deprecated and recommends using Guix channels. In the Guix manual I see the way to add a channel to your Guix, now is there a way to use a local git directory? So that I could experiment locally — without right away going through syncing the local git with an online git repository? If not I'll guess I'll have to go through Github just to play with some intro stuff.

Second, working on the Guix git checkout is recommended as the best way. What is the way of working with Guix git checkout on a GuixSD system? I.e. should I pull, build it — the git. Then what? Where to run guix pull and guix package -u — in the git, leave the SD versions un-updated?

Finally, are there some nice examples of using inheritance? I.e. I just want to add a compile option, or some dependency to some package — is there some example I can play with?

Many thanks for any help! :@)

[1] https://www.gnu.org/software/guix/blog/2018/a-packaging-tutorial-for-guix/

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白い熊