[gradle-user] Empty Zip File

[Neil Chaudhuri]

I am attempting to aggregate a bunch of PDF files in subproject doscDir folders 
into a single zip file. Here is my task definition:

task aggregatePDFJavadoc(type: Zip) {
source = files(subprojects.collect { project ->
    fileTree(dir: project.docsDir.absolutePath)
  })
  includes = ["**/*.pdf"]
}

The PDF files are there, but apparently the source FileCollection is empty (as 
indicated by a simple source.each {println it} statement). The zip is therefore 
empty.

Any insight into the appropriate configuration is appreciated.

Thanks.