per-module module-source-path for javac

[Jonathan Gibbons]

Nikolay,

We are looking at this.

One aspect of the problem we have to take into account is that 
currently, the JavaFileManager API does not special case the module 
source path (yes, I know the *implementation* special cases it, even at 
the handleOption level) and so we need to come up with a way providing 
and specifying the functionality you are looking for in a way that fits 
in with the overall design.

-- Jon



On 12/16/16 5:05 AM, Nikolay Chashnikov wrote:
> Any comments?
>
> On Mon, Dec 12, 2016 at 8:29 PM, Nikolay Chashnikov <
> nikolay.chashnikov at jetbrains.com> wrote:
>
>> Hello,
>>
>> we're actively working on support for Jigsaw in IntelliJ IDEA. Some time
>> ago we asked (see this post
>> <http://mail.openjdk.java.net/pipermail/jigsaw-dev/2016-October/009713.html>)
>> about restrictions in --module-source-path parameter of javac command line.
>> It appears that currently javac has rather strict requirements regarding
>> layout of the source files of multi-module projects on the disk: module
>> sources must be located under a directory which name is equal to the
>> (qualified) module name, and locations of source directories for different
>> modules must follow some common scheme. It's ok for new projects, but it
>> complicates migration of existing projects to Jigsaw: you not only need to
>> create module-info.java files, get rid of split packages, etc, but also
>> most probably you'll need to rearrange directories containing the sources.
>> For me, the latter looks like an unnecessary complication, it may make
>> migration to Jigsaw more difficult, especially for big projects developed
>> by large teams. I think it would be great to allow users to specify
>> module-source-path for each module individually.
>>
>> Given that the implementation (com.sun.tools.javac.file.Locations.
>> ModuleSourcePathLocationHandler) already stores paths for different
>> modules separately, it seems to be rather easy to expose ability to specify
>> module-source-path on per-module basis to StandardJavaFileManager's API.
>> The change in API suggested by Jonathan Gibbons (see this post
>> <http://mail.openjdk.java.net/pipermail/jigsaw-dev/2016-October/009781.html>)
>> looks good, it will allow us to support arbitrary layout of sources in
>> IntelliJ IDEA. Do you plan to implement it? How can we help you with that?
>>
>> --
>> Nikolay Chashnikov
>> Team Lead
>> JetBrains
>> http://www.jetbrains.com
>> The Drive to Develop
>>
>
>