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From Ninju Bohra <ninju_bo...@yahoo.com>
Subject Re: "post failure tasks" for failing targets
Date Tue, 13 Mar 2007 01:50:02 GMT
With the standard ANT tasks you can not handle a 'failing' build.

Of course that's why the authors of the <exec> task provided the 'failonerror' attribute.
 Instead of setting it to 'true' (which results in the buildscript stopping) how about setting
it to 'false' and doing the following

<target name="foo" depends="do_exec, success_only, failure_only, after_exec">
</target>

<target name="do_exec">
    <property name="success_code" value="0"/>
    <exec dir="..." executable="..." resultproperty="result_code"/>
    <condition property="exec_succeeded">
        <equals arg1="${result_code}" arg2="${success_code}"/>
     </condition>
 </target>

   <target name="success_only" if="exec_succeeded">
        ...
    </target>

    <target name="failure_only" unless="exec_succeeded">
        ....
    </target>

    <target name="after_exec">
        <text2xml src="..." destfile="..."/>
    </target>


Now...I have nothing against <trycatch>, I have used it before and it has its place...but
you may want to try using the 'resultproperty' attribute since it is available

Later,

Ninju
----- Original Message ---- 
From: martin sweitzer <msewlists@gmail.com> 
To: user@ant.apache.org 
Sent: Monday, March 12, 2007 6:29:31 PM 
Subject: "post failure tasks" for failing targets 


For a cruisecontrol set up we have a task called text2xml. So for 
text2xml to do its magic it needs to run :-) 

This is problematic for something like: 

<target name="foo" depends=""> 

<exec dir="${binaries.dir}" 
executable="${binaries.dir}/${exampleGame.execName}" 
output="${compileOptions.logDir}/${exampleGame.log}.log" 
failonerror="true"> 
<arg line="${commandLineParams}"/> 
</exec> 

<text2xml srcfile = "${compileOptions.logDir}/${exampleGame.log}.log" 
destfile = "${compileOptions.logDir}/${exampleGame.log}_log.xml" 
element = "${compileOptions.projectName}" 
attribute = "name" 
value = "${exampleGame.log}" 
/> 

</target> 


So the exec fires off and then it has an error so the failonerror 
aborts the target and returns! 

This is more generally formed as: How do you do "post failure tasks" 
for failing targets when the various exec type tasks return from a 
failonerror="true" ? 

Is there some way to register a "do after this fails" delegate that I 
am missing? 


From another thread I saw the trycatch 
(http://ant-contrib.sourceforge.net/tasks/tasks/trycatch.html). Is 
that the standard way of doing the above? 

so if you have: 

<target name="a" depends="b,c,d,e,f,g,h,i,j,k,l, taskToRunLast"> 

You would do something like: 

<target name="aDoIt" depends="b,c,d,e,f,g,h,i,j,k,l"> 

<target name="a"> 

<trycatch property="foo" reference="bar"> 
<try> 
<antcall target="aDoIt" /> 
</try> 

<catch> 
<echo></echo> 
</catch> 

<finally> 
<antcall target="taskToRunLast" /> 
</finally> 
</trycatch> 

</target> 


And then for each depends that also has some "post failure task" then 
slap in a trycatch there also? 


Seems to work pretty well in my quick test case. Is this the way to go? :-) 

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