How to create a task associated a target

[Al Le]

Hello,

in my ant script, I do the following:

1. there is a target "calledTarget"

2. there is a task "macroTask", defined via "macrodef". This task contains in its body a call to "calledTarget" (via "antcall").

3. there is a target "mainTarget" which contains a task "script" (javascript). In this script, I create an instance of macroTask and then execute it.


Here's the picture as an outline:

<project default="mainTarget">

<target name="mainTarget">
<script language="javascript">
var task = project.createTask("macroTask");
// task.setOwningTarget(project.getTargets().get("mainTarget")); // This must be done to avoid NPE
task.perform();
</script>
</target>

<macrodef name="macroTask">
<sequential>
<antcall target="calledTarget"/>
</sequential>
</macrodef>

<target name="calledTarget">
<!-- Do something -->
</target>

</project>

When I run the script, I get a NullPointerException. I found out that it occurs in Ant.java, at the line "if (getOwningTarget().getName().equals("")) {" (line number about 380, depending on the ant version).

OK, it's clear that the owning target is not set for the task because the task is created via the project (and not via a target).

Now I have some questions:

1. Is it possible to create a task so that it "automatically" gets associated with a task?

2. Is it possible to find out the name of the current target (or even get the current target as an object) in a script? So that I don't have to write "mainTarget" in the call to "setOwningTarget" in the script above, but rather can do something like getCurrentTarget().


The code above is just an outline. In the real script, I have a rather complicated logics in the javascript, and from the script I set some project properties and call the macro which passes the properties to the called target (to call the target is my real goal; the macroTask is just passing it through).

Thank you
AL

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[Jan Matèrne (jhm)]

Try
task.setOwningTarget( self.getOwningTarget() );

'self' is referencing the <script> task and the new created instance will get its owning target.


Jan

-----Ursprüngliche Nachricht-----
Gesendet: Dienstag, 26. April 2016 08:53
Betreff: How to create a task associated a target
Hello,
1. there is a target "calledTarget"
2. there is a task "macroTask", defined via "macrodef". This task
contains in its body a call to "calledTarget" (via "antcall").
3. there is a target "mainTarget" which contains a task "script"
(javascript). In this script, I create an instance of macroTask and
then execute it.
<project default="mainTarget">
<target name="mainTarget">
<script language="javascript">
var task = project.createTask("macroTask");
//
task.setOwningTarget(project.getTargets().get("mainTarget")); // This
must be done to avoid NPE
task.perform();
</script>
</target>
<macrodef name="macroTask">
<sequential>
<antcall target="calledTarget"/>
</sequential>
</macrodef>
<target name="calledTarget">
<!-- Do something -->
</target>
</project>
When I run the script, I get a NullPointerException. I found out that
it occurs in Ant.java, at the line "if
(getOwningTarget().getName().equals("")) {" (line number about 380,
depending on the ant version).
OK, it's clear that the owning target is not set for the task because
the task is created via the project (and not via a target).
1. Is it possible to create a task so that it "automatically" gets associated with a task?
2. Is it possible to find out the name of the current target (or even
get the current target as an object) in a script? So that I don't have
to write "mainTarget" in the call to "setOwningTarget" in the script
above, but rather can do something like getCurrentTarget().
The code above is just an outline. In the real script, I have a rather
complicated logics in the javascript, and from the script I set some
project properties and call the macro which passes the properties to
the called target (to call the target is my real goal; the macroTask is
just passing it through).
Thank you
AL
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