Server instance deploying script.

deploy.py

#!/usr/bin/python
import os, sys, yaml, shutil

homeDir = "/home/minecraft/"
serversDir = "/home/minecraft/"
dataDir = homeDir + ".deploy/"
srvTemplate = dataDir + "template"

# FILES
mcProps = "server.properties"

def get(key):
    try:
        return data[key]
    except KeyError:
        return None
def loadConfig():
    global data
    global dataFile
    try:
        data = yaml.load(file(dataDir + "data.yml", "r"))
    except IOError: # First run
        data = yaml.load("{}")
    dataFile = file(dataDir + "data.yml", "w")

def set(key, value):
    data[key] = value
    yaml.dump(data, dataFile)

def cfgRepl(fileName, key, value):
    key = str(key)
    value = str(value)
    os.system('sed -i "s/' + key + '=.*/' + key + '=' + value + '/" "' + fileName + '"')

def deploy(name, port, motd=None):
    serverDir = serversDir + name + '/'
    shutil.copytree(srvTemplate, serverDir)
    cfgRepl(serverDir + mcProps, 'server-port', port)
    cfgRepl(serverDir + mcProps, 'server-name', name)
    if motd != None:
        cfgRepl(serverDir + mcProps, 'motd', name)
    pass

def main():
    loadConfig()
    argLength = len(sys.argv) - 1
    if argLength == 0:
        print "Incorrect usage: deploy <name> [port]"
        return
    name = sys.argv[1]

    if argLength > 1:
        port = sys.argv[2]
    else:
        lastPort = get('last-port')
        if lastPort == None: lastPort = 25566
        port = lastPort + 1

    deploy(name, port)
    set('last-port', port)

if __name__ == "__main__":
    main()