feat(settings): add user settings support with defaults values and trusts

[noirbizarre]

Hello 👋🏼

This PR adds support for user settings with initial support for:

• user defaults (Add support for user config file #235)
• trusted repositories

Settings are stored in <CONFIG_ROOT>/settings.yml where <CONFIG_ROOT> is the
standard configuration directory for your platform:

• $XDG_CONFIG_HOME/copier (~/.config/copier in most cases) on Linux as defined by
  XDG Base Directory Specifications
• ~/Library/Application Support/copier on macOS as defined by
  Apple File System Basics
• %USERPROFILE%\AppData\Local\copier on Windows as defined in
  Known folders

This location can be overridden by setting the COPIER_SETTINGS environment variable.

The settings look like:

defaults:
    user_name: "John Doe"
    user_email: john.doe@acme.com
trust:
    - https://github.com/account/template.git
    - https://github.com/org/
    - ~/templates/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.05%. Comparing base (57439e5) to head (fbd4021).
Report is 114 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1940      +/-   ##
==========================================
+ Coverage   97.85%   98.05%   +0.20%     
==========================================
  Files          51       53       +2     
  Lines        5404     5511     +107     
==========================================
+ Hits         5288     5404     +116     
+ Misses        116      107       -9     

Flag	Coverage Δ
unittests	98.05% <100.00%> (+0.20%)	⬆️

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[pawamoy]

Very nice! I like the prefix matching approach for trusted repositories, it's simple and it makes sense.

[sisp]

Fantastic work, @noirbizarre! 🎉 Thanks for working on and contributing these valuable features! 🙏

I have a few minor remarks. And would you mind fixing the formatting errors in the corresponding commit and drop the auto-fix commit? We'll likely want to rebase-merge this PR to keep the two feature commits, so the auto-fix commit would only add some noise to the Git history.

[noirbizarre]

You're welcome ! 🙏🏼
I take the suggestion commit, and I'll rebase properly everything, that was plan from the start 😉

[sisp]

Just a few more comments after another review iteration. 🙂

[noirbizarre]

PR rebased to solve lock conflict

[pawamoy]

👌

[sisp]

Just some final polishing requests from my side. With two independent commits in a PR, we need to be extra careful to associate a change with the right commit. For instance, we have a formatting change in the first commit and the inverse change in the second commit, so there's no diff for this section under Files changed but there is a diff in each commit.

[noirbizarre]

Updated 👍🏼
Sorry, the direnv+nix seems broken on my setup, and it was still having an older flake8+black stack in pre-commit (which applied the faulty formatting).
However, the poe lint task seems OK, I'll do with it 👍🏼

[sisp]

Thank you very much again for this great PR and your patience with the review cycles, @noirbizarre! 🙏

I think we can merge this PR, only one tiny cosmetic detail I just stumbled over 🫣: Could you fix the second commit message?

-feat(settings): allows to defined some trusted repositories or prefixes
+feat(settings): allow to define some trusted repositories or prefixes

[noirbizarre]

No problem, there it is, fixed. (Sorry, I do many typos currently 😅)

[sisp]

No worries, thanks again for your efforts and patience!