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From Sam Ruby <ru...@apache.org>
Subject System Info (was: Speed of brutus)
Date Fri, 02 Apr 2004 15:28:33 GMT
Adam R. B. Jack wrote:
> 
>>And finally, a nit: I see useful information like the name of the java
>>command ("java") and the Operating System ("posix"), but I don't see the
>>values of System.getProperties which contains values such as:
>>
>>        java.vm.version=1.4.2_04-b05
>>        java.vm.vendor=Sun Microsystems Inc.
>>        os.arch=i386
>>        os.name=Linux
> 
> Hmm. No, not directly. If a project repeatedly fails Gump automatically
> turns on ant verbose and/or debug, and maybe this show those values. Is
> there a way to list these things (above) without writing some Java?

What's wrong with writing some Java?  ;-)

import commands, os, re

TMP_DIR = '/home/rubys/tmp'
JAVA_SOURCE = TMP_DIR + '/sysprop.java'

properties = [
   'java.vendor',
   'java.version',
   'os.name',
   'os.arch',
   'os.version'
]

source=open(JAVA_SOURCE,'w')
source.write("""
   public class sysprop {
     public static void main(String [] args) {
       for (int i=0; i<args.length; i++) {
         System.out.print(args[i]);
         System.out.print(": ");
         System.out.println(System.getProperty(args[i]));
       }
     }
   }
""")
source.close()

os.system('javac ' + JAVA_SOURCE)
os.unlink(JAVA_SOURCE)

cmd='java -cp ' + TMP_DIR + ' sysprop ' + ' '.join(properties)
properties = dict(re.findall('(.*?): (.*)', commands.getoutput(cmd)))
os.unlink(JAVA_SOURCE.replace('.java','.class'))

for (key,value) in properties.items():
   print key, "=>", value

- Sam Ruby

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