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From "Richard S. Hall" <>
Subject Two issues
Date Sun, 18 Feb 2001 16:33:05 GMT
First, I am using Ant 1.3beta2 on Win98 with JDK 1.3.

I was re-organizing my build files this morning and I ran across two
issues.  I have all of my source files in one package tree, since that
is how they are logically organized, but portions of the source tree are
actually packaged into separate JAR files.

For an example, we'll use this directory structure:


The packages c1, c2, c3 represent individual components that are
compiled into separate JAR files containing only the classes from their
respective package.

Since each one (c1, c2, c3) is created using a very similar target in my
build file, I use local parameters to parameterize the differences,

    <target name="c1" depends="blah">
        <property name="" value="c1"/>
        <property name="my.output" value="${out$}/${}"/>
        ... then compile and create JAR file here...

For each component, the above is exactly the same other than the name of
the component.  (One side note, is there a built-in property for the
currently executing target?).  An issue arose when I added a dependency
between two of the components, e.g.:

    <target name="c1" depends="blah,c2">

In this scenario, Ant does execute the "c2" target first, but when it
comes back to execute the "c1" target, the local property ${} is
bound to the value in "c2", not the value that I set it to in "c1".
Thus the target doesn't do the right thing since its name property is
incorrect.  Is this the correct behavior?

In order to work around this issue, I have removed the dependency from
"c1" and I added a sub-target that builds them in the correct order.  In
doing so, I did discover another issue.  If I specifically build just
the "c1" target and the "c2" target has not been created, then Ant
(actually javac I assume) automatically includes the Java files from the
"c2" target that "c1" depends on because all of the classes are in the
same src tree.  The interesting thing is that Ant correctly states that
is is compiling 14 files (which I counted), but the result from the
compiler includes classes from the "c2" package.  This doesn't seem like
the correct behavior from Ant's perspective (from javac perhaps, but not
Ant).  I would rather get an error saying there were unresolved symbols,
instead I end up with duplicated classes in multiple JAR files.

Both of these issues are avoidable, but annoying.  Am I doing something
incorrectly here?

-> richard

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