https://bz.apache.org/bugzilla/show_bug.cgi?id=26453
--- Comment #2 from Chris Fairman <chris.fair...@ballaerospace.com> ---
Ultimately the issue is that if a non-zero return value is encountered (even
when expected) it isn't possible to avoid the following output even when
"discardOutput" and/or "discardError" is set:
[exec] Result: 1
- or -
[exec] Result: <Other Non-Zero Return Value>
As use case for expected non-zero return values on Windows, findstr returns 0
if a string is found, non-zero if not.
We use a for loop to check the state of a TomEE service that can take a
while to stop:
<exec executable="cmd" spawn="false" failonerror="false"
resultproperty="result" discardError="true" >
<arg value="/c" />
<arg value="sc query ${service_name} | findstr STATE |
findstr STOPPED"/>
</exec>
If a service is not in a stopped state yet ( i.e: STOPPING ), ${result}
is populated as expected, however "[exec] Result: 1" is displayed despite
efforts to avoid output.
test.xml:
<?xml version="1.0"?>
<project name="Exec_Testing" default="all" basedir=".">
<target name="return_zero" >
<exec executable="cmd" spawn="false" failonerror="false"
resultproperty="result" discardOutput="true" discardError="true" >
<arg value="/c" />
<arg value="exit 0"/>
</exec>
</target>
<target name="return_nonzero" >
<exec executable="cmd" spawn="false" failonerror="false"
resultproperty="result" discardOutput="true" discardError="true" >
<arg value="/c" />
<arg value="exit 1"/>
</exec>
</target>
</project>
---------------
Return Zero
---------------
F:\> ant -buildfile test.xml return_zero
Buildfile: F:\test.xml
return_zero:
BUILD SUCCESSFUL
Total time: 0 seconds
---------------
Return NonZero
---------------
F:\> ant -buildfile test.xml return_nonzero
Buildfile: F:\test.xml
return_nonzero:
[exec] Result: 1
BUILD SUCCESSFUL
Total time: 0 seconds
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