Print info about current project file in use to stderr and ignore the imports by default

[ulysses4ever]

fix #10547 by printing the project config info to stderr.

Also, report only top-level project configs with the default verbosity. Otherwise, imported config files can still be seen in the verbose mode.

Manual Q/A

Try to reproduce #10547

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[ulysses4ever]

Oh my, the two hundred tests now fail because warn attaches Warning: to the message..

[ulysses4ever]

I just ran list-bin on Cabal repo and the output is a hot mess:

❯ cabal list-bin cabal
Warning: this is a debug build of cabal-install with assertions enabled.
Configuration is affected by the following files:
- cabal.project
Configuration is affected by the following files:
- project-cabal/constraints.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/ghc-latest.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/ghc-options.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/benchmarks.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/buildinfo.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/cabal.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/install.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/integration-tests.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
Configuration is affected by the following files:
- project-cabal/pkgs/tests.config
imported by: project-cabal/pkgs.config
imported by: cabal.project
/home/artem/Dev/cabal/repo/dist-newstyle/build/x86_64-linux/ghc-9.10.1/cabal-install-3.15.0.0/x/cabal/build/cabal/cabal

[ulysses4ever]

Okay, I figured how to print to stderr without reaching to warn: verboseStderr verbosity.

I'm also fixing the above mentioned issue with multiple Configuration is affected. It still looks quite chatty for Cabal, which uses plenty of imports since recently. Maybe we should find a way to print only top-level project files.

[philderbeast]

Maybe we should find a way to print only top-level project files.

I'm working on something similar (an alternative to #9933 that warns instead of errors), see branch fix/y-fork-project-import-warning-only. I've seen the loss of indent in those messages before and corrected it by changing from warn to noticeDoc.

[ulysses4ever]

All right, now it prints only top-level project config files in the default verbosity. In the verbose mode it prints the whole thing (imported project files too). The formatting of imports is not great but it's okay for verbose mode and can be fixed later if desired.

[ulysses4ever]

@Kleidukos, #10507 (backported to 3.14) turned out severely undercooked. This PR fixes it for the most part. So, I hope it can be backported too. Otherwise, it’d be desirable to revert the backport of 10507.

[Kleidukos]

Sure, just put the correct labels to remind us to do the backports :)

[ulysses4ever]

This fixes a regression on master that was backported to 3.14. In the interest of getting it into the release, I'm skipping the two-days delay.

[ulysses4ever]

@mergify backport 3.14

[mergify]

backport 3.14

✅ Backports have been created

• #10550 Backport #10548: Print info about current project file in use to stderr and ignore the imports by default has been created for branch 3.14 but encountered conflicts