This is great. Thank you so much for the thorough explanation and examples.
:)
----Original Message Follows----
From: Ninju Bohra <[EMAIL PROTECTED]>
Reply-To: Ninju Bohra <[EMAIL PROTECTED]>
To: Ant Users List <user@ant.apache.org>
Subject: Re: Antcall task not doing what I want it to do!
Date: Thu, 16 Mar 2006 19:46:54 -0800 (PST)
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Hello Res Pons,
By design the <antcall> task loads an new "ANT" session in which the
"target" task is run in and when the "target" task is completed the "ANT"
session is destroyed and no property values/path refs are carried back into
the calling session (think of the <antcall> task as a subroutine call where
all the state (i.e. property creation/assingments) is kept in local
variables, when the rountine finishes all the local variables are gone).
Prior to some earlier verison (ANT 1.6 I believe) the only way to "chain"
targets together and allow property values to remain was through the
depends="<list of targets>" attribute because each of the dependent targets
would run in same "ANT" session.
After the ANT 1.6, the <macrodef> task was created which allowed you to
define a resuable set of ANT tasks that ran under the same "ANT" session.
If within a <macrodef> task you set a property (or path set) it would be
visible (and final) for the life of the 'ANT' session.
You can re-write you example, using <macrodef>s as follows:
<macrodef name="newbuildnum" >
<sequential>
<buildnumber file="build/build.number"/>
<property name="full.build.number" value="${build.number}" />
<echo message="And the full build.number in destination target is ==>
${full.build.number}" />
</sequential>
</macrodef>
<target="callbuildnumber" >
<!-- we now invoke the macrodef we created. Note we reference the macrodef
as an element
just a "custom" task --->
</newbuildnum>
<echo message="And the full build.number in calling target is ==>
${full.build.number}" />
</target>
Please read up on the <macrodef> task in the ANT help for further
information on this powerful new addition.
Also for the ANT documentation group, I might be nice to add some verbage
to the <antcall> task documentation pointing that fact that properties
values are transported across the <antcall>.
After all that has been said, if you REALLY REALLY need to bring back some
property values from a <antcall> invocation you can look into the
<antcallback> task from the ant-contrib project, however I would use that
only as a last resort.
----- Original Message ----
From: Res Pons <[EMAIL PROTECTED]>
To: user@ant.apache.org
Sent: Thursday, March 16, 2006 6:52:54 PM
Subject: Antcall task not doing what I want it to do!
Hi everyone!
I'm making an antcall from the source target to its destination target.
<targe="callbuildnumber" >
<antcall target="newbuildnum" />
<echo message="And the full build.number in calling target is ==>
${full.build.number}" />
</targe>
<targe="newbuildnum" >
<buildnumber file="build/build.number"/>
<property name="full.build.number" value="${build.number}" />
<echo message="And the full build.number in destination target is ==>
${full.build.number}" />
</targe>
Naturally the echo stmt in the newbuildnum target works but how do I get it
back to callbuildnumber target, the echo stmt in this target does not work?
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