Add Ubuntu Desktop workflows

[msuchane]

Description

This PR adds Git, patching and packaging workflows migrated from the Ubuntu wiki: https://wiki.ubuntu.com/DesktopTeam/git

These guides are mainly written for the Ubuntu Desktop Team but community contributors can also follow them.

Some of the content is similar in its overall purpose to existing Ubuntu Project guides but the Desktop and GNOME workflow is distinct.

Related issue

https://warthogs.atlassian.net/browse/UDENG-6342

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Checklist

• I have read and followed the Ubuntu Project contributing guide
• My pull request is linked to an existing issue (if applicable)
• I have tested my changes, and they work as expected

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Additional notes (optional)

This documentation needs one final review by Desktop Team members. It's a draft for now.

We can adjust the placement of the files in the documentation set. I realize they don't fit too neatly.

[quine00]

Thanks for working on this! Comments in-line.

[quine00]

Partial review, will come back later. Thanks!

[msuchane]

Thanks @quine00 for the review so far!

Sally and Robert, please take a look if the placement within the documentation set is appropriate. I chose the patching folder for the maintenance guide because that seemed like the closest fit.

[msuchane]

Hi @s-makin and @rkratky, this PR is now basically ready from the engineering side. Let me know what you think about including it in the Project Docs.

The Desktop workflow is different in that it uses git-buildpagage (gbp) to manage patches, while the workflow in Project Docs relies on quilt. I've been told that gbp is basically a better, more modern replacement for quilt: we can consider whether to recommend it by default even outside of the Desktop use cases.

[rkratky]

Thanks, @msuchane! A bunch of suggestions, questions, and a few nits :)

[rkratky]

Thanks, @msuchane! A bunch of suggestions, questions, and a few nits :)

[s-makin]

Hi @s-makin and @rkratky, this PR is now basically ready from the engineering side. Let me know what you think about including it in the Project Docs.

The Desktop workflow is different in that it uses git-buildpagage (gbp) to manage patches, while the workflow in Project Docs relies on quilt. I've been told that gbp is basically a better, more modern replacement for quilt: we can consider whether to recommend it by default even outside of the Desktop use cases.

Thanks @msuchane - I agree with everything that @rkratky has already picked up on.

With regards to the default workflows, I think the ultimate intention should be for us to be quite opinionated on what's recommended (at least for beginners) - but since everyone has a different workflow, what to align on is a decision for Ubuntu Engineering + the Ubuntu Community to make. For now just having all the docs in one place is good enough, so I would agree with Robert's suggestion to park these pages in the Niche section for the time being.

[msuchane]

Thanks for the detailed review @rkratky!

I wasn't aware that the Packaging Guide is now also replaced by Project Docs. Thanks for letting me know.

I absolutely agree that the niche packaging category is the best spot for this content.

I'm gonna resolve the remaining issues and move the pages there.

[msuchane]

Hi @rkratky and @s-makin, all reviews and issues are now addressed. The new documentation is in the niche packaging folder. Feel free to merge at your convenience.

Thanks everyone for your help!

[msuchane]

Now published here:

https://documentation.ubuntu.com/project/maintainers/niche-package-maintenance/desktop/