Steve Loughran wrote:
Frederic Chalons wrote:
Hi,
My problem involved the attribute jvmarg set to a property which
value is ""...
Using Ant 1.6.4, I am using the java task to launch various process:
/ <java classname="${classname}">/
/ <arg value="${arg1}" />/
/ <arg value="${arg2}" />/
/ <jvmarg value="${jvmarg1}" />/
/ <jvmarg value="${jvmarg2}" />/
/ </java>/
For each class the properties (arg1, arg2, jvmarg1, jvmarg2,etc. )
are loaded from xml file.
After that, for each undefined property, its value is set to "".
As a property cannot be overwritten, it behaves as defining a default
value.
This is working fine as long as jvmarg1 & jvmarg2 properties have a
value but breaks when they use "" as default value.
Running ant -debug gives the following:
/''/
/''/
/The ' characters around the executable and arguments are/
/not part of the command./
/ [java] Exception in thread "main"
java.lang.NoClassDefFoundError:/
/BUILD FAILED/
It seems that empty jvmarg is the caused but I need to find a way to
inhibit jvmarg attribute when the associated property is not used.
Alternatively, you need a default JVM argument that can be used
multiple times and has no side effects, and make that the default.
the -ea option to enable assertions for a package may work there...
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Hi Steve,
Thank you for your insight.
By the way, I was given another workaround by defining a system property
as default value.
ex: <property name="arg1" value="-Dtoto="titi" />
This not very elegant but it works as a charm :-)
Regards,
Frederic
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