Launcher used to send jobs with DrQueue from a configuration file.

drqueue.conf

[ffmpeg]
bin = /usr/bin/ffmpeg	
lib = /my/first/lib
    /my/second/lib
    
[ls]
bin = /bin/ls

[directories]
dir_1 = /home/

launcher.py

#! /usr/bin/python

import ConfigParser, argparse, subprocess, sys, os


def configParser_on_file(configFile):
    config = ConfigParser.RawConfigParser()
    config.read(configFile)

    return config


def parse_config_file(configFile = 'drqueue.conf'):
    config = configParser_on_file(configFile)
    sectionsDict = dict()
    
    for section in config.sections():
        sectionsDict[section] = dict(config.items(section))
               
    return sectionsDict


def add_to_libs_path(lib):
    if lib != None and lib != '':
        platform = sys.platform
        libs_path = 'PATH'    
        
        if 'linux' in platform: 
            libs_path = 'LD_LIBRARY_PATH'        
        
        elif 'darwin' == platform: 
            libs_path = 'DYLD_LIBRARY_PATH'
        
        try:
            os.environ[libs_path] = os.environ[libs_path] + os.pathsep + lib 
        except KeyError:
            os.environ[libs_path] = lib 


def cmd_analyse(cmd, configFile = "drqueue.conf"):
    config = parse_config_file(configFile)

    i = 0          
    while i < len(cmd):
        section = cmd[i][1:-1].lower() # remove % %

        if section != 'directories' and config.has_key(section):
            tmp = config[section]
            
            if tmp.has_key('bin'):
                cmd[i] = tmp['bin']

            if tmp.has_key('lib'):
                add_to_libs_path(tmp['lib'].replace(os.linesep, os.pathsep))
                
        elif config.has_key('directories'):
            tmp = config['directories']
        
            for j in tmp:
                if ('%' + j + '%') in cmd[i]:
                    cmd[i] = cmd[i].replace('%' + j + '%', tmp[j])
                    cmd[i] = os.path.abspath(cmd[i])            
        
        i += 1
        
    return cmd


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('cmd', help="The complete command you would use", nargs='+')

    args = parser.parse_args()
    cmd = cmd_analyse(args.cmd)     
    
    try: 
        subprocess.check_call(cmd)
    except OSError as e:
        print >>sys.stderr, "Execution failed:", e
        sys.exit(1)
    except subprocess.CalledProcessError as e:
        sys.exit(e.returncode)
        
    sys.exit(0)

Usage : python launcher.py %ls% %dir_1%