buildiso: Introduce exclude-systems CLI option and distro autodetection

[aaannz]

Linked Items

Fixes #

Description

This commit makes --distro option optional, if not provided first profile or first system is used to get the distro automatically.

This commit introduces --exclude-systems option. This instructs buildiso to not write any system records entries to the isolinux/grub config. Useful particularly when only profile entries are requested.

Behaviour changes

Old: buildiso --distro is mandatory option. There is no way to export config only for specific profiles if systems exists too.

New: --distro is optional, determined from first profile or system if not set. Use --exclude-systems to export configuration only for provided profiles.

Category

This is related to a:

• Bugfix
• Feature
• Packaging
• Docs
• Code Quality
• Refactoring
• Miscellaneous

Tests

• Unit-Tests were created
• System-Tests were created
• Code is already covered by Unit-Tests
• Code is already covered by System-Tests
• No tests required

[m-czernek]

The code itself looks OK to me, but we need to fix some of the CI fails:

• Add Black formatting
• Add the missing changelog entry
• Import error that causes the tests to fail (I think that's the same issue as some of the Codacy failures, together with some missing type declaration(s))

That should fix a lot of the CI fails

[agraul]

Changes for netboot LGTM!

Could you also add --exclude-systems for buildiso.standalone?

[aaannz]

About the imports, I see that Distro was there before and is under TYPE_CHECKING condition. So I assume we do not want to have to import Profile and System by default.

Am I correct to instead of e.g. List[Profile] add like List["Profile"] and add new Optional where needed?

[SchoolGuy]

Thank you for this addition. I would argue that the Git commit log could be cleaned up but it is not mandatory in my eyes to merge this PR.

[agraul]

My question still stands, is this something that is also needed for --standalone?