Hi guys,

I have a use case where I'd like to be able to expose to a user some file
system navigation and enable him to visualize the file system (as in beam
sense)

Technically it is a matter of being able to use glob pattern to browse the
file system using match(specs).

What is important in that use case is to align the visualization and the
potential runtime to have the same impl/view and not have to split it in 2
code branches which can lead to inconsistency.

Therefore i'd like to be able to reuse beam FileSystem but I have a few
blockers:

1. it is nested in sdk-java-core which brings 2 drawbacks
a. it brings the whole beam sdk which is not desired in that part of the
app (should not be visible in the classpath)
b. the dependency stack is just unpractiable (guava, jackson, byte-buddy,
avro, joda, at least, are not desired at all here) and a shade makes it way
too fat to be a valid dependency for that usage
2. I don't know how to configure the FS from one of its instance (I'd like
to be able to get its options class like FileSystem#getConfigurationType
returning a PipelineOptions)

Do you think it is possible to extract the filesystem API in a dependency
free beam subproject (or at least submodule) and add the configuration hint
in the API?

Romain Manni-Bucau
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