#!/usr/bin/python
#------------------------------------------------------------------------------
# Copyright (c) Perforce Software, Inc., 2011-2015. All rights reserved
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1  Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
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# 2.  Redistributions in binary form must reproduce the above copyright
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#     documentation and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PERFORCE
# SOFTWARE, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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#------------------------------------------------------------------------------
#

import sys
import os
import marshal
import subprocess
from subprocess import Popen, PIPE

# EDIT THIS LINE TO CONFIGURE THE DEPOT LOCATION OF THE AUTOMERGE DIRECTORY
baseDepotPath    = "//devtools/p4/dev/automerge"
backgroundUser   = "automerge"
passwordFileName = "/p4/common/bin/backgroundpass"

# Store baseDepotPath as an environment variable for this session
os.environ["automerge.baseDepotPath"] = baseDepotPath
scriptPath = "{0}/automerge_impl.py".format(baseDepotPath)

# containsError
#     utility function to check for any error code in the results array
def containsError(results=[]):
    foundError = False
    for r in results:
        if 'code' in r:
            if r['code'] == 'error':
                foundError = True
    return foundError

# login 
#     log into the server as the background user
def login():
    loginCommand = "p4 -u {0} -p {1} login < {2}".format(backgroundUser,os.environ.get("P4PORT"),passwordFileName)
    returnCode = subprocess.call(loginCommand, stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT, shell=True)
    # check that the user is logged in, if not raise an exception
    cmd = ["login","-s"]
    result = p4MarshalCmd(cmd)    
    if containsError(result):
        print "ERROR: User {0} is not logged in".format(backgroundUser)
        sys.exit(1)

# p4MarshalCmd
#     executes the p4 command, results sent to a list
def p4MarshalCmd(cmd):
    list = []
    pipe = Popen(["p4", "-G"] + cmd, stdout=PIPE).stdout
    try:
        while 1:
            record = marshal.load(pipe)
            list.append(record)
    except EOFError:
        pass
    pipe.close()
    return list

###########################################################################
##### MAIN PROGRAM STARTS HERE
#####

if os.environ.get("P4USER") == backgroundUser:
    login()

output = p4MarshalCmd(["where",scriptPath])
if output[0]['code'] == 'error':
    print "Error:  You must have " + scriptPath + " mapped in your current workspace.\n"
    print output
    sys.exit(1)

automerge_impl = output[0]['path']

output = p4MarshalCmd(["sync","-f",scriptPath])
if output[0]['code'] == 'error':
    if not "file(s) up-to-date" in output[0]['data']:
        print "Error:  Sync error for " + scriptPath + "\n"
        print output
        sys.exit(1)

import automerge_impl

automerge_impl.main()