#!/usr/local/bin/python

"""A Python version of the Perforce "p4" client.

This uses the Python type P4API.P4Adapter, which is a wrapper for the
Perforce ClientApi object. 

$Id: //depot/r09.2/p4-python/P4.py#1 $

#*******************************************************************************
# Copyright (c) 2007-2009, Perforce Software, Inc.  All rights reserved.
# Portions Copyright (c) 1999, Mike Meyer. All rights reserved.
# Portions Copyright (c) 2004-2007, Robert Cowham. 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.
#
# 2.  Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 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 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#*******************************************************************************

Copyright 2007-2009 Perforce Software, Inc. All rights reserved


License:
See accompanying LICENSE.txt including for redistribution permission.
"""

import sys, os, string, datetime
import types, re
from contextlib import contextmanager

# P4Error - some sort of error occurred
class P4Exception(Exception):
    """Exception thrown by a P4 instance in case of an Perforce error or warning"""
    
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return str(self.value)

# The following classes are not used yet.
# Preparation for a future separation of P4Error and P4Warning

class P4Error(P4Exception):
    """Exception thrown by a P4 instance in case of an error"""
    
    def __init__(self, value, errors):
        P4Exception.__init__(self, value)
        self.errors = errors
    def __str__(self):
        return "P4Error : " + str(self.value) + " " + str(self.errors)
    
class P4Warning(P4Exception):
    """Exception thrown by a P4 instance in case of a warning"""

    def __init__(self, value, warnings):
        P4Exception.__init__(self, value)
        self.warnings = warnings
    def __str__(self):
        return "P4Warning : " + str(self.value) + " " + str(self.warnings)

class Spec(dict):
    """Subclass of dict, representing the fields of a spec definition.
    
    Attributes can be accessed either with the conventional dict format,
    spec['attribute'] or with shorthand spec._attribute.
    
    Instances of this class will preventing any unknown keys.
    """
    def __init__(self, fieldmap=None):
        self.__dict__['_Spec__fields'] = fieldmap
    
    def permitted_fields(self):
        return self.__fields
    
    def __setitem__(self, key, value):
        if key in self or self.__fields == None:
            dict.__setitem__(self, key, value)
        elif str(key).lower() in self.__fields:
            dict.__setitem__(self, self.__fields[key.lower()], value)
        else:
            raise P4Error, ("Illegal field " + str(key), [])
    
    def __getattr__(self, attr):
        key = str(attr).lower()
        if key[0] != '_':
            raise AttributeError, attr
        key = key[1:]
        if key in self:
            return self[key]
        elif key in self.__fields:
            return self[self.__fields[key]]
                    
    def __setattr__(self, attr, value):
        key = str(attr).lower()
        if key[0] != '_':
            raise AttributeError, attr
        key = key[1:]
        self[key] = value

#
# P4Integration objects hold details about the integrations that have
# been performed on a particular revision. Used primarily with the
# P4Revision class
#
class Integration:
  def __init__( self, how, file, srev, erev ):
    self.how = how
    self.file = file
    self.srev = srev
    self.erev = erev

  def __repr__(self):
      return "Integration (how = %s file = %s srev = %s erev = %s)" % (self.how, self.file, self.srev, self.erev)
#
# Each P4Revision object holds details about a particular revision
# of a file. It may also contain the history of any integrations 
# to/from the file
#

class Revision:
  def __init__( self, depotFile ):
    self.depotFile = depotFile
    self.integrations = []
    self.rev = None
    self.change = None
    self.action = None
    self.type = None
    self.time = None
    self.user = None
    self.client = None
    self.desc = None
    self.digest = None
    self.fileSize = None

  def integration( self, how, file, srev, erev ):
    rec = Integration( how, file, srev, erev )
    self.integrations.append( rec )
    return rec

  # iterator over the collection calling a provided function
  # Python's poor man version of the Ruby block 
  def each_integration(self):
    for i in self.integrations:
        yield i

  def __repr__(self):
      return "Revision (depotFile = %s rev = %s change = %s action = %s type = %s time = %s user = %s client = %s)" % \
              (self.depotFile, self.rev, self.change, self.action, self.type, self.time, self.user, self.client)
#
# Each DepotFile entry contains details about one depot file. 
# 
class DepotFile:
  def __init__( self, name ):
    self.depotFile = name
    self.revisions = []

  def new_revision(self):
    r = Revision( self.depotFile )
    self.revisions.append( r )
    return r

  def each_revision(self):
    for r in self.revisions:
      yield r

  def __repr__(self):
    return "DepotFile (depotFile = %s, %s revisions)" % ( self.depotFile, len( self.revisions ) )

#
# Resolver class used in p4.run_resolve()
#
# The default simply checks that p4.input is set to sensible value
# This class is meant to be subclassed for a custom resolver and
# Resolver.resolve() overriden
#

class Resolver:
    def __init__(self):
        pass
    
    def resolve(self, mergeInfo):
        if mergeInfo.merge_hint == "e":
            print "Standard resolver encountered merge conflict, skipping resolve"
            return "s"
        else:
            return mergeInfo.merge_hint

# This is where the C/C++ shared library is loaded
# It has to be in this place because the library needs to access
# the classes defined above. Accessing classes defined below this
# entry would cause an endless loop

import P4API

class P4(P4API.P4Adapter):
    """Use this class to communicate with a Perforce server
    
    Instances of P4 will use the environment settings (including P4CONFIG)
    to determine the connection parameters such as P4CLIENT and P4PORT.
    
    This attributes can also be set separately before connecting.
    
    To run any Perforce commands, users of this class first need to run
    the connect() method.
    
    It is good practice to disconnect() after the program is complete.
    """
    # Constants useful for exception_level
    # RAISE_ALL:     Errors and Warnings are raised as exceptions (default)
    # RAISE_ERROR:   Only Errors are raised as exceptions
    # RAISE_NONE:    No exceptions are raised, instead False is returned
    
    RAISE_ALL = 2
    RAISE_ERROR = 1
    RAISE_NONE = 0
	
    def __init__(self, *args, **kwlist): 
        P4API.P4Adapter.__init__(self, *args, **kwlist)

    def __del__(self):
        if self.debug > 3:
            print >>sys.stderr, "P4.__del__()"
            
    # store the references to the created lambdas as a weakref to allow Python 
    # to clean up the garbage. |The lambda as a closure stores a reference to self
    # which causes a circular reference problem without the weakref
    
    def __getattr__(self, name):
        if name.startswith("run_"):
            cmd = name[len("run_"):]
            return lambda *args: self.run(cmd, *args)
        elif name.startswith("delete_"):
            cmd = name[len("delete_"):]
            return lambda *args: self.run(cmd, "-d", *args)
        elif name.startswith("fetch_"):
            cmd = name[len("fetch_"):]
            return lambda *args: self.run(cmd, "-o", *args)[0]
        elif name.startswith("save_"):
            cmd = name[len("save_"):]
            return lambda *args: self.__save(cmd, *args)
        elif name.startswith("parse_"):
            cmd = name[len("parse_"):]
            return lambda *args: self.parse_spec(cmd, *args)
        elif name.startswith("format_"):
            cmd = name[len("format_"):]
            return lambda *args: self.format_spec(cmd, *args)
        else:
            raise AttributeError, name
    
    def __save(self, cmd, *args):
        self.input = args[0]
        return self.run(cmd, "-i", args[1:])
    
    def __repr__(self):
        state = "disconnected"
        if self.connected():
            state = "connected"
            
        return "P4 [%s@%s %s] %s" % \
          (self.user, self.client, self.port, state)
    
    def identify(cls):
        return P4API.identify()
    identify = classmethod(identify)
    
    def run(self, *args):
        "Generic run method"
        return P4API.P4Adapter.run(self, *self.__flatten(args))
        
    def run_submit(self, *args):
        "Simplified submit - if any arguments is a dict, assume it to be the changeform"
        nargs = list(args)
        form = None
        for n, arg in enumerate(nargs):
            if isinstance( arg, dict):
                self.input = arg
                nargs.pop(n)
                nargs.append("-i")
                break
        return self.run("submit", *nargs)
    
    def run_login(self, *args):
        "Simple interface to make login easier"
        self.input = self.password
        return self.run("login", *args)

    def run_password( self, oldpass, newpass ):
        "Simple interface to allow setting of the password"
        if( oldpass and len(oldpass) > 0 ):
            self.input = [ oldpass, newpass, newpass ]
        else:
            self.input = [ newpass, newpass ]
            
        return self.run( "password" )

    #
    # run_filelog: convert "p4 filelog" responses into objects with useful
    #              methods
    #
    # Requires tagged output to be of any real use. If tagged output it not 
    # enabled then you just get the raw data back
    #
    def run_filelog( self, *args ):
      raw = self.run( 'filelog', args )
      if (not self.tagged): 
          # untagged mode returns simple strings, which breaks the code below
          return raw
      result = []
      for h in raw:
          r = None
          if isinstance( h, dict ):
              df = DepotFile( h[ "depotFile" ] )
              for n, rev in enumerate( h[ "rev" ]):
                  # Create a new revision of this file ready for populating
                  r = df.new_revision()
                  # Populate the base attributes of each revision
                  r.rev = int( rev )
                  r.change = int( h[ "change" ][ n ] )
                  r.action = h[ "action" ][ n ] 
                  r.type = h[ "type" ][ n ]
                  r.time = datetime.datetime.utcfromtimestamp( int( h[ "time" ][ n ]) )
                  r.user = h[ "user" ][ n ]
                  r.client = h[ "client" ][ n ]
                  r.desc = h[ "desc" ][ n ]
                  if "digest" in h:
                    r.digest = h[ "digest" ][ n ]
                  if "fileSize" in h:
                    r.fileSize = h[ "fileSize" ][ n ]

                  # Now if there are any integration records for this revision,
                  # add them in too
                  
                  if (not "how" in h) or (n >= len(h["how"]) or h["how"][n] == None):
                      continue
                  else:
                      for m, how in enumerate( h[ "how" ][ n ] ):
                          file = h[ "file" ][ n ][ m ]
                          srev = string.lstrip(h[ "srev" ][ n ][ m ], '#')
                          erev = string.lstrip(h[ "erev" ][ n ][ m ], '#')
                          
                          if srev == "none":
                              srev = 0
                          else:
                              srev = int( srev )
                        
                          if erev == "none":
                              erev = 0
                          else:
                              erev = int( erev )
                              
                          r.integration( how, file, srev, erev )
          else:
              r = h
          result.append( df )
      return result

    def run_print(self, *args):
      raw = self.run('print', args)
      result = [raw.pop(0), ""]
      
      for line in raw:
          result[-1] += line
      return result
    
    def run_resolve(self, *args, **kargs):
        myResolver = Resolver()
        if "resolver" in kargs: 
            myResolver = kargs["resolver"]
            
        savedResolver = self.resolver
        self.resolver = myResolver
        result = self.run("resolve", args)
        self.resolver = savedResolver
        
        return result
    
    def __flatten(self, args):
        result = []
        if isinstance(args, tuple) or isinstance(args, list):
            for i in args:
                result.extend(self.__flatten(i))
        else:
            result.append(args)
        return tuple(result)

    def __enter__( self ):
        return self
        
    def __exit__( self, exc_type, exc_val, exc_tb ):
        if self.connected():
            self.disconnect()
        return True
        
    def connect( self ):
        P4API.P4Adapter.connect( self )
        return self
    
    @contextmanager
    def while_tagged( self, t ):
        old = self.tagged
        self.tagged = t
        yield
        self.tagged = old
    
    @contextmanager
    def at_exception_level( self, e ):
        old = self.exception_level
        self.exception_level = e
        yield
        self.exception_level = old
        
    @contextmanager
    def saved_context( self , **kargs):
        """Saves the context of this p4 object and restores it again at the end of the block"""
    
        saved_context = {}
        for attr in self.__members__:
            saved_context[attr] = getattr(self, attr)
    
        for (k,v) in kargs.items():
            setattr( self, k, v)
        
        yield
        
        # now restore the context again. Ignore AttributeError exception
        # Exception is expected because some attributes only have getters, no setters
        
        for (k,v) in saved_context.items():
            try:
                setattr( self, k, v )
            except AttributeError:
                pass # expected for server_level and p4config_file

class Map(P4API.P4Map):
    def __init__(self, *args):
        P4API.P4Map.__init__(self, *args)
        if len(args) > 0:
            self.insert( *args )
    
    LEFT2RIGHT = True
    RIGHT2LEFT = False
    
    def __str__( self ):
        result = ""
        
        for a in self.as_array():
            result += a + "\n"
    
        return result
        
    def is_empty(self):
        """Returns True if this map has no entries yet, otherwise False"""
        
        return self.count() == 0
    
    def includes(self, *args):
        return self.translate(*args) != None
    
    def insert(self, *args):
        """Insert an argument to the map. The argument can be:
        
        A String, 
            Either of the form "[+-]//lhs/... //rhs/..." or "[+-]//lhs/..." 
            for label style maps.
        A List:
            This is a list of strings of one of the single string formats 
            described above.
        A pair of Strings:
            P4.Map.insert(lhs, rhs)
        """
        
        if len(args) == 1 :
            arg = args[0]
            if isinstance( arg, str ):
                P4API.P4Map.insert( self, arg )
            elif isinstance( arg, list ):
                for s in arg:
		    P4API.P4Map.insert( self, s )
                    
        else: # expecting 2 args in this case: left, right 
            left = args[0].strip()
            right = args[1].strip()
            P4API.P4Map.insert(self, left, right )

if __name__ == "__main__":
    p4 = P4()
    p4.connect()
    try:
        ret = p4.run(sys.argv[1:])
        for line in ret:
            if isinstance(line, dict):
                print "-----"
                for k in line.keys():
                    print k, "=", line[k]
            else:
                print line
    except:
        for e in p4.errors:
            print e