convert/gem/ruby: Don't overwrite existing melange files

[justinvreeland]

No description provided.

[luhring]

Is this fixing a bug? If so, is this something we could add a test for?

[justinvreeland]

Is this fixing a bug? If so, is this something we could add a test for?

I consider it a bug. If you run melange convert gem X in Wolfi it should not overwrite the existing files you already have. This exists in python already though I didn't notice a matching test.

I suppose the test would just be to find a gem that has a dependency, writing an empty file to the current directory for that dependency and then running convert to make sure the empty file is not overwritten. Would this go in e2e_tests?

[luhring]

I suppose the test would just be to find a gem that has a dependency, writing an empty file to the current directory for that dependency and then running convert to make sure the empty file is not overwritten.

Yeah sounds good!

Would this go in e2e_tests?

I think we could scope the test down to just calling findDependencies (or its caller) using the Go testing framework. The "e2e" tests using bash to do larger scale operations, and I don't think we need all that here.