On 12/07/2015 11:46 AM, Alan Bateman wrote:
On 07/12/2015 17:18, Stephane Epardaud wrote:
Hi,
When there is a -modulepath argument, is it a path in the Unix sense?
With a list of File.pathSeparator-separated folders?
Ceylon produces `.car` files instead of `.jar` files, but they're really
zip files like jars. Will Java examine the file type to determine that
it's a zip file, or will it give up at its name?
Will there be support for module folder trees? Otherwise it pretty much
forces Maven/Ceylon users to copy modules from a tree to a flat folder.
That's an extra step, and it's possible, but it'd be nice if it weren't
mandatory. I know there are several tree mappings that don't entirely
correspond, with Ant, Maven, OSGi and Ceylon possibly differring
slightly, so this may be difficult.
Worst case I'll add a "ceylon export-java-mlib my.module/2.0" to create
that mlib folder and populate it flatly and rename `.car` files to
`.jar`.
Module path is conceptually very simple, it's just a sequence of sets
of modules.
As things currently stand then the -mp argument to javac and java is a
sequence of directories, with File.pathSeparator as the separator. The
current implementations just looks for exploded modules or files
ending with ".jar" files in those directories. So ".car" files will be
ignored. There are also ".jmod" files that are also zip format but
with a different internal structure.
The layout issue is something that Robert Scholte brought up in the
last few days too (in the context of Maven). There are a couple of
ideas floating around but no conclusions yet. In Robert's thread then
the suggestion is that it allow file paths to JAR files (like class
path). I don't think there is any conclusion on this topic yet so
feedback in this area is timely.
-Alan.
At a lower level, when javac encounters file on a class path with a file
extension it doesn't know about, it does try and open the file as a zip
file. I would expect the same heuristics to apply as appropriate, once
we figure the semantics of module path, as indicated by Alan.
-- Jon
