Hi, Jeremy
-----Original Message-----
From: Jeremy Hanna [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 12, 2008 3:56 AM
To: [email protected]
Subject: Using the script tag, wanting to return a value
/*
I'm using the script tag to run a ruby script and would like to return
a value from the script. Is that possible? I see that I can use the
setbeans attribute to have access to the build.xml variables from
within the ruby script. I can output them and even change those
variables within the ruby script, but those changes disappear once the
script returns.
Is there any way to return the value?
Really I'm trying to get the result of `svn info` which is retrieved
in my ruby script. I haven't seen ant libraries out there that do
that - most don't implement the info function. I tried using the exec
task but that seems to need the path information and that gets too
messy.
*/
if you need to return value(s) out of <script> and make them available
for further processing by ant you need to put them into the project
scope
of your running ant script.
therefore you make use of the ant api =
$project.setProperty "propertyname", value
$project.setNewProperty "propertyname", value
difference = setProperty allows also overwriting of existing properties.
Overwriting of properties collides with ant rules - means immutability
of properties - but sometimes it's a must.
beside using the ant api a 'puts' or 'print' in your script prints on
stdout
and gets logged
and finally your script may write/append to a file for persistance
f.e. to make values available for other scripts that run isolated
what i'd try with your svn info command, is using
the backtick operator as i did with nslookup in
the first example.
two small examples =
1.getting the servername from nslookup on windows
<scriptdef name="getservername" language="ruby">
<attribute name="alias"/>
<attribute name="property"/>
<![CDATA[
getserver=`nslookup "#{$attributes.get('alias')}"`
$project.setProperty $attributes.get('property'),
"//#{getserver.scan(/Name:\s+(\w+)\./)}"
]]>
</scriptdef>
<getservername alias="test1" property="test.deploy"/>
...
<echo>$${test.deploy} = ${test.deploy}</echo>
2. sleep random
<script language="ruby">
<![CDATA[
a = ['15','30','60','90','120']
$project.setProperty "sleep.time", a[rand(a.size)
]]]>
</script>
<sleep seconds="${sleep.time}"/>
Regards, Gilbert
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