file.Glob: Replace stdlib Glob to support double star syntax

[fionera]

Is your feature request related to a problem? Please describe. The Go stdlib implements Glob with Match as its base and does not support the double star syntax. To allow recursive lists via file.Glob it should be supported.

Describe the solution you'd like Replace the usage of the stdlib Glob with an implementation that supports double stars like https://github.com/bmatcuk/doublestar

Describe alternatives you've considered I didnt found any good way to list all files of an extension recursively

Additional context https://stackoverflow.com/questions/26809484/how-to-use-double-star-glob-in-go https://github.com/golang/go/issues/11862

[myitcv]

Thanks for raising. Please can you edit the description above, filling out the template for a feature request:

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The "Feature Request" issue type is linked from https://github.com/cue-lang/cue/issues/new/choose for convenience.

[fionera]

Sure thing :) I wasnt sure if this is a feature request or a bug since CUE already has a Glob feature, but doesnt implement the full spec.

[myitcv]

but doesnt implement the full spec.

The history behind that decision is covered in https://github.com/golang/go/issues/11862. I think we need to first reach agreement that we want to implement/use something different for CUE. And then discuss how that should be implemented.