alr update fails: Dependency resolution failed

[stcarrez]

Yet another useful improvement for Alire. Sometimes you get the following error when you run the alr update command:

-> Dependency resolution failed
ERROR: Update failed
ERROR: alr update unsuccessful

The -v option does not help. The -vv option requires deep understanding of how Alire works.

It would be nice to have an explanation about the dependency failure.

Of course, I made a mistake, but which crate is having a wrong dependency and for which other crate? That's is the question!

[mosteo]

Yes, I think this is a duplicate of #220.

[Fabien-Chouteau]

There are indeed many places where alr output can be more user-friendly.
Thank you for reporting those 👍

@mosteo maybe we should have a specific GitHub issue label for this kind of problem so that we can list them when we have time to work on usability.

[mosteo]

👍 Created the usability label for this

[mosteo]

Implemented by #451. Now you get a summary of the dependency solution, where any problematic dependency will also be highlighted as missing.