Question

I’m working on an SBT plugin where I’d like to zip up a directory. This is possible due to the following method in IO:

def zip(sources: Traversable[(File,String)], outputZip: File): Unit

After tinkering with this method, it seems that simply passing it a directory and expecting the resulting zip file to have the same file & folder structure is wrong.. Passing a directory (empty or otherwise) results in the following:

[error]...:zipper: java.util.zip.ZipException: ZIP file must have at least one entry

Therefore, it appears that the way to get use the zip method is by stepping through the directory and adding each file individually to the Traversable object.

Assuming my understanding is correct, this strikes me as very odd – vey rarely do users need to cherry-pick what is to be added to an archive.

Any thoughts on this?

Answer 1

It seems like you can use this to compose a zip with files from multiple places. I can see the use of that in a build system.