Allow impure Flake

[shikanime]

Currently, flakehub-push only supports pushing pure Nix flakes to FlakeHub. However, there are valid cases for impure flakes, such as those that use devenv. This issue proposes adding a new option to that allows users to indicate their flake is impure for the nix flake show command to work.

[yajo]

I'm having the same error here: https://github.com/copier-org/copier/actions/runs/13752905656/job/38456132767

logs_35421876080.zip

Is there any workaround for now?

[grahamc]

Currently, FlakeHub deliberately does not support impure flakes. What is the devenv use case that requires impure flakes?

[shikanime]

It's simply an edge case of flake. Devenv needs to know the current directory (aka PWD) in order to set up the tools, cache, and other configuration files.

[Malix-Labs]

Perhaps Impure could be allowed but a warning showing up on flakehub should show up too?