> compile
$ exists target/**/clean-managed/src_managed/foo.txt target/**/clean-managed/src_managed/bar.txt

> clean
$ absent target/**/clean-managed/src_managed/foo.txt
$ exists target/**/clean-managed/src_managed/bar.txt
$ exists target/**/clean-managed/src_managed/bar.txt || target/**/clean-managed/src_managed/x.txt