feat: allow selecting individual packages

[imobachgs]

This pull request implements support for selecting individual packages during the installation.

{
  "software": {
    "patterns": ["gnome_desktop"],
    "packages": ["vim"],
  }
}

Links

• Trello: https://trello.com/c/Ondb9itc/

To improve

When a package does not exist, the problem is logged but not reported. We could handle this problem in a separate PR (or even a separate PBI) because we might need a way to handle a) errors in the PackagesProposal.

[imobachgs]

@lslezak I need your help here 😉 I wonder whether it is better:

• Add the packages to the proposal (using the SetResolvables method). The solver does not run after that, but we can fix that. Deselecting packages is not supported this way, but I'd like to know whether we need/want that.
• Follow a similar approach to what we do with patterns: have a SetUserPatterns method at D-Bus level. This one is more complex, but it won't be hard to implement it.

We can start with a) and move to b) later. However, I would like to have the point of view of a software management expert.

[lslezak]

I do not know the details but I'd probably use the same mechanism as for selecting the mandatory packages from the product configuration. To be consistent.

[imobachgs]

I do not know the details but I'd probably use the same mechanism as for selecting the mandatory packages from the product configuration. To be consistent.

Good point. Then I will continue with the current implementation that tuses the proposal's SetResolvables.

Thanks!

[teclator]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 13856620473

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 9 of 16 (56.25%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on select-packages-proposal at 72.324%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
rust/agama-server/src/software/web.rs	0	2	0.0%
rust/agama-lib/src/software/client.rs	0	5	0.0%

Totals
Change from base Build 13837957018:	72.3%
Covered Lines:	20020
Relevant Lines:	27681

---

💛 - Coveralls