DO NOT REPLY [Bug 22427] New: - javac task to compile files independently

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22427

javac task to compile files independently

           Summary: javac task to compile files independently
           Product: Ant
           Version: 1.5.3
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Core tasks
        AssignedTo: dev@ant.apache.org
        ReportedBy: jtulach@netbeans.org
                CC: jesse.glick@netbeans.com


Problem description:
I have a lot of .java files in src/ directory and they form a logical groups
which I would like to compile separately. Of course I could move the files into
group1/src, group2/src, but that would mean that I loose CVS history of each
file (we have horrible relation with our CVS server maintainer). That is why I
decided to convince javac to compile the files separatelly even the sources
share the same root. Surprisingly it is possible - one just does not specify
-sourcepath, only names all the files to compile with full name and javac does
not try to search for files not explicitly enumerated as arguments. 

I have tried to do the same with Ant <javac> task, but it seems there is no way
to *not* specify the sourcepath and just enumerate the files (I understand,
there would be no way to check whether the files are already compiled or not).
Let say that I would like to do something like this:

<!-- compile group1 -->
<javac destdir="group1/dest" >
  <include name="src/org/group1/**/*.java" />
</javac>

<!-- compile group2 -->
<javac destdir="group2/dest" >
  <include name="src/org/group2/**/*.java" />
</javac>

and be sure that if by a chance file in group2 references file in group1 that
the second compilation fails.

Request:
========

I would like the <javac> task to allow compilation without specifying the
sourcepath. Then the above described behaviour of javac could be used and my
separation could work.


Workaround:

Actually there is a workaround of this problem. But it relies on the "srcdirnote":
http://ant.apache.org/manual/CoreTasks/javac.html#srcdirnote

and I am affraid it could be broken with future version of ant. The trick is
based on specification of wrong sourcepath (src/org instead of src) and then
moving the compiled classes at right location. See it at:
http://www.netbeans.org/source/browse/openide/build.xml.diff?r1=1.148.4.16&r2=1.148.4.17


I would be glad if we could remove this hack in some version of ant with
improved <javac>. Regards.

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