[conan-center] Hook to check short-paths in Windows

[jgsogo]

We have deactivated the short-paths limitation in CCI, but still it would be useful to check if a package has any file with a path longer than 250(?) and raise an error if the recipe doesn't add the short_paths = True attribute. If the recipe has the attribute, a warning could be useful.

[uilianries]

So we need to check post package, and look into the package folder.

[Croydon]

This is still no guarantee that it works, since the Conan directory can be literally everywhere

How long is the path to the Conan folder itself on CCI Windows machines?

[jgsogo]

Yes, we are aware of the problem, but the best we can do in CCI is to add the short_paths=True when we detect those long paths. If, even with that patch, due to the user home or to the package nested directories, it has a path too long for Windows there is nothing we can do (I can't imagine how to know a build has failed because of this issue).

The hook need to check files at every step: unpackaged sources, build folder and package folder. It needs to check for paths longer than XXX (relative to its base path) and raise if the recipe doesn't activate short_paths.