How to conditionally set arg value of exec task?

Question

I\'ve got an ant build script which I should modify. Specifically I should make a subversion checkout conditional: currently only the trunk gets checked out, the new version

Answer 1

You could define a wrapper target which depends on two other targets - one of which does trunk checkout, the other of which does branch checkout - and each of which is conditional on existence of your optional branch property.

You could further abstract the exec call into a macrodef to which you pass the trunk or branch url.

For example:

Output with no branch property defined:

do-svn-trunk-checkout:
     [echo] svn-url=http://t01/svn/java/trunk

do-svn-branch-checkout:

do-svn-checkout:

Output with branch property defined:

do-svn-trunk-checkout:

do-svn-branch-checkout:
     [echo] svn-url=http://t01/svn/hlfg/HLFG/java/branch/mybranch

do-svn-checkout: