[question] How to do properly lowercase package name conversion?

[harsszegi]

What is your question?

Hi,

as Conan 2 breaks package naming, we had to rename a few of our packages to lowercase.
Which breaks Conan 1 completely, e.g.:

ERROR: Failed requirement 'Foo/3.1.0@user/channel' from 'bar/0.1.0@user/channel'
ERROR: Requested 'Foo/3.1.0@user/channel', but found case incompatible recipe with name 'foo' in the cache. Case insensitive filesystem can't manage this.
Remove existing recipe 'foo' and try again.

Obviously within the cache there is both "Foo/3.1.0" (before the rename) and "foo/3.2.0" (after the rename) as there are "old" recipes still using "Foo".

How to handle this?
Thanks,

Have you read the CONTRIBUTING guide?

• I've read the CONTRIBUTING guide

[memsharded]

Hi @harsszegi

Thanks for the question.

Obviously within the cache there is both "Foo/3.1.0" (before the rename) and "foo/3.2.0" (after the rename) as there are "old" recipes still using "Foo".

This is not an issue in Conan 1 for Linux and other case-sensitive filesystems, but it was always problematic for Windows, and that was the reason why ConanCenter moved to lowercase only many years ago, and Conan 2 forced lowercase always.

For Windows and Conan 1 it requires to clear the cache of older packages with the uppercase. It is a bit inconvenient in the transition, but Conan 1 didn't find a better way back then to move forward.

If this is too inconvenient, you might try the Conan 2 conf core:allow_uppercase_pkg_names that allows uppercase initially as a escape, but just consider this is temporary and it will be full removed. Conan 2 uses some hashing in the cache paths, so it will not have this issue for different versions of the same package, even if they have different casing.

[harsszegi]

Thanks a lot for the info, closing it!