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From "Keith Hughitt" <keith.hugh...@gmail.com>
Subject Re: Trouble executing python script in Unix
Date Wed, 16 Jul 2008 13:32:14 GMT
Hi Luis,

Thanks for the suggestion. I had tried using "ant -v" before, and also
redirecting the output, but was not aware of the '-d' parameter.
The script *should* result in a new file, "proj-all-min.js" being created.
The file is only created when I run the script manually, however,
and not when I call the script during an Ant build.

Here is the relevant section of my build.xml as well as the complete output
from execution:

========= BEGIN build.xml ===============
<project name="proj" default="build" basedir="../">
.
.
.
    <target name="build">

        <!-- create build directory -->
        <mkdir dir="lib/proj/build"/>

        <!-- test -->
        <exec dir="install" executable="test.py" resolveexecutable="true"/>

        <!-- minify -->
        <exec dir="./" executable="python" resolveexecutable="true">
            <arg value="install/tools/jsmin.py"/>
            <arg value="&lt;/var/www/hv/lib/proj/build/proj-all.js&gt;"/>
            <arg value="/var/www/hv/lib/proj//build/proj-all-min.js"/>
        </exec>


========= END build.xml ===========

Note: Ant is run from /install, and thus "../" points to the project's root
directory.
         The relevant python script is located in /install/tools, and
"test.py" is a dummy
         script located in /install that I used to test a simple case of
script execution.

=========BEGIN OUTPUT===========

$:/var/www/hv/install$ ant -d
Apache Ant version 1.7.0 compiled on August 29 2007
Buildfile: build.xml
Adding reference: ant.PropertyHelper
Detected Java version: 1.6 in: /usr/lib/jvm/java-6-sun-1.6.0.06/jre
Detected OS: Linux
Adding reference: ant.ComponentHelper
Setting ro project property: ant.file -> /var/www/hv/install/build.xml
Adding reference: ant.projectHelper
Adding reference: ant.parsing.context
Adding reference: ant.targets
parsing buildfile /var/www/hv/install/build.xml with URI =
file:/var/www/hv/install/build.xml
Setting ro project property: ant.project.name -> proj
Adding reference: proj
Setting ro project property: ant.file.proj -> /var/www/hv/install/build.xml
Project base dir set to: /var/www/hv
 +Target:
 +Target: build
[antlib:org.apache.tools.ant] Could not load definitions from resource
org/apache/tools/ant/antlib.xml. It could not be found.
Attempting to create object of type
org.apache.tools.ant.helper.DefaultExecutor
Adding reference: ant.executor
Build sequence for target(s) `build' is [build]
Complete build sequence is [build, ]

build:
     [exec] Current OS is Linux
     [exec] Executing '/var/www/hv/install/test.py'
     [exec] The ' characters around the executable and arguments are
     [exec] not part of the command.
Execute:Java13CommandLauncher: Executing '/var/www/hv/install/test.py'
The ' characters around the executable and arguments are
not part of the command.
     [exec] Hello World
     [exec] Current OS is Linux
     [exec] Executing 'python' with arguments:
     [exec] 'install/tools/jsmin.py'
     [exec] '</var/www/hv/lib/proj/build/proj-all.js>'
     [exec] '/var/www/hv/lib/proj//build/proj-all-min.js'
     [exec]
     [exec] The ' characters around the executable and arguments are
     [exec] not part of the command.
Execute:Java13CommandLauncher: Executing 'python' with arguments:
'install/tools/jsmin.py'
'</var/www/hv/lib/proj/build/proj-all.js>'
'/var/www/hv/lib/proj//build/proj-all-min.js'

The ' characters around the executable and arguments are
not part of the command.

BUILD SUCCESSFUL
Total time: 0 seconds

=========END OUTPUT===========


Any ideas?


Thanks,
Keith




On Wed, Jul 16, 2008 at 5:56 AM, André Pilz <andre.pilz@pcvisit.de> wrote:

> Hi,
>
> need more info to help you. Use "ant -d" to get the command line and the
> arguments how python is called. How exactly does it not work? Any error
> message?
>
> Cheers,
> André
>
> Keith Hughitt schrieb:
>
>  Hi all,
>>
>> I've just recently started using Ant on Linux, and so far it has been
>> really
>> amazing. I've run into
>> one problem, however, that I haven't been able to get past.
>>
>> I would like to call an external script (a python script to minimize some
>> JavaScript files),
>> but have not been able to get it to execute properly. I searched around
>> some, and found
>> an earlier thread (http://marc.info/?l=ant-user&m=115078380228196&w=2)
>> where someone with a similar problem was able to fix things setting
>> "resolveexecutable" to true.
>> This works for me when I try running a dummy script with no arguments,
>> e.g:
>>
>> ...
>> <exec dir="./" executable="test.py" resolveexecutable="true"/>
>> ...
>>
>> [exec] Hello World
>>
>>
>> When I try and do something requiring command-line arguments though I
>> can't
>> get it to work:
>>
>>        <exec dir="./" executable="python" resolveexecutable="true">
>>            <arg value="install/tools/jsmin.py"/>
>>            <arg value="&lt;${libs}/build/test.js&gt;"/>
>>            <arg value="${libs}/build/testl-min.js"/>
>>        </exec>
>>
>> I've tried executing both "python" (and passing the scripts name as an
>> argument), and the script itself.
>> Nothing seems to work. The command executes fine from the command-line,
>> and
>> what even more, when
>> I print the arguments passed to the python script using argv, and then
>> string them together and run them
>> it works fine, but still no luck when I try to get it working through ant.
>>
>> Anyone have any suggestions as to what might be the problem?
>>
>> Any help would be greatly appreciated.
>>
>> Thanks,
>> Keith
>>
>>
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