I use Eclipse and Ivy. Ivy in some library do not download source code. For example, the library, such as Colt:
<dependency org="colt" name="colt" rev="1.2.0"/>
With H2 database, help this configuration:
<dependency org="com.h2database" name="h2" rev="1.3.164" conf="default->master,sources" />
How to set up ivy.xml that always download sources?