How do define optional dependancy

[Srinath Perera <he...@gmail.com>]

Hi All;

I want to add  a optional jar dependency. 

I have add a sourceModification to exclude the code if the jar is not
presents. I want the build to not fail if the jar specified is not in
the
repository. 

I look for two things 

a) some way to say that dependancy is optional in project.xml file
b) way to affect the classpath the code compiled and tests are runs in
a pre goal

pls let me know anyone know a way to do it

Thanks
Srinath

p.s. I search the mail archives, do not found what I looking for

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