execute Ant task if TWO conditions are met

Question

The above ant script implements if dir_is_empty then git-clone else git-fetch using Ant-1.7.1 core statements

Answer 1

Even when bound to Ant 1.7.1 you may combine your 3 chk targets into one, see the condition part in the snippet. Since Ant 1.9.1 (better use Ant 1.9.3 because of bugs in Ant 1.9.1 see this answer for details) it is possible to add if and unless attributes on all tasks and nested elements, so no extra target needed, f.e. :