contrib/fast-import/git-p4

   1 #!/usr/bin/env python
   2 #
   3 # git-p4.py -- A tool for bidirectional operation between a Perforce depot and git.
   4 #
   5 # Author: Simon Hausmann <simon@lst.de>
   6 # Copyright: 2007 Simon Hausmann <simon@lst.de>
   7 #            2007 Trolltech ASA
   8 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
   9 #
  10
  11 import optparse, sys, os, marshal, subprocess, shelve
  12 import tempfile, getopt, os.path, time, platform
  13 import re
  14
  15 verbose = False
  16
  17
  18 def p4_build_cmd(cmd):
  19     """Build a suitable p4 command line.
  20
  21     This consolidates building and returning a p4 command line into one
  22     location. It means that hooking into the environment, or other configuration
  23     can be done more easily.
  24     """
  25     real_cmd = "%s " % "p4"
  26
  27     user = gitConfig("git-p4.user")
  28     if len(user) > 0:
  29         real_cmd += "-u %s " % user
  30
  31     password = gitConfig("git-p4.password")
  32     if len(password) > 0:
  33         real_cmd += "-P %s " % password
  34
  35     port = gitConfig("git-p4.port")
  36     if len(port) > 0:
  37         real_cmd += "-p %s " % port
  38
  39     host = gitConfig("git-p4.host")
  40     if len(host) > 0:
  41         real_cmd += "-h %s " % host
  42
  43     client = gitConfig("git-p4.client")
  44     if len(client) > 0:
  45         real_cmd += "-c %s " % client
  46
  47     real_cmd += "%s" % (cmd)
  48     if verbose:
  49         print real_cmd
  50     return real_cmd
  51
  52 def chdir(dir):
  53     if os.name == 'nt':
  54         os.environ['PWD']=dir
  55     os.chdir(dir)
  56
  57 def die(msg):
  58     if verbose:
  59         raise Exception(msg)
  60     else:
  61         sys.stderr.write(msg + "\n")
  62         sys.exit(1)
  63
  64 def write_pipe(c, str):
  65     if verbose:
  66         sys.stderr.write('Writing pipe: %s\n' % c)
  67
  68     pipe = os.popen(c, 'w')
  69     val = pipe.write(str)
  70     if pipe.close():
  71         die('Command failed: %s' % c)
  72
  73     return val
  74
  75 def p4_write_pipe(c, str):
  76     real_cmd = p4_build_cmd(c)
  77     return write_pipe(real_cmd, str)
  78
  79 def read_pipe(c, ignore_error=False):
  80     if verbose:
  81         sys.stderr.write('Reading pipe: %s\n' % c)
  82
  83     pipe = os.popen(c, 'rb')
  84     val = pipe.read()
  85     if pipe.close() and not ignore_error:
  86         die('Command failed: %s' % c)
  87
  88     return val
  89
  90 def p4_read_pipe(c, ignore_error=False):
  91     real_cmd = p4_build_cmd(c)
  92     return read_pipe(real_cmd, ignore_error)
  93
  94 def read_pipe_lines(c):
  95     if verbose:
  96         sys.stderr.write('Reading pipe: %s\n' % c)
  97     ## todo: check return status
  98     pipe = os.popen(c, 'rb')
  99     val = pipe.readlines()
 100     if pipe.close():
 101         die('Command failed: %s' % c)
 102
 103     return val
 104
 105 def p4_read_pipe_lines(c):
 106     """Specifically invoke p4 on the command supplied. """
 107     real_cmd = p4_build_cmd(c)
 108     return read_pipe_lines(real_cmd)
 109
 110 def system(cmd):
 111     if verbose:
 112         sys.stderr.write("executing %s\n" % cmd)
 113     if os.system(cmd) != 0:
 114         die("command failed: %s" % cmd)
 115
 116 def p4_system(cmd):
 117     """Specifically invoke p4 as the system command. """
 118     real_cmd = p4_build_cmd(cmd)
 119     return system(real_cmd)
 120
 121 def isP4Exec(kind):
 122     """Determine if a Perforce 'kind' should have execute permission
 123
 124     'p4 help filetypes' gives a list of the types.  If it starts with 'x',
 125     or x follows one of a few letters.  Otherwise, if there is an 'x' after
 126     a plus sign, it is also executable"""
 127     return (re.search(r"(^[cku]?x)|\+.*x", kind) != None)
 128
 129 def setP4ExecBit(file, mode):
 130     # Reopens an already open file and changes the execute bit to match
 131     # the execute bit setting in the passed in mode.
 132
 133     p4Type = "+x"
 134
 135     if not isModeExec(mode):
 136         p4Type = getP4OpenedType(file)
 137         p4Type = re.sub('^([cku]?)x(.*)', '\\1\\2', p4Type)
 138         p4Type = re.sub('(.*?\+.*?)x(.*?)', '\\1\\2', p4Type)
 139         if p4Type[-1] == "+":
 140             p4Type = p4Type[0:-1]
 141
 142     p4_system("reopen -t %s %s" % (p4Type, file))
 143
 144 def getP4OpenedType(file):
 145     # Returns the perforce file type for the given file.
 146
 147     result = p4_read_pipe("opened %s" % file)
 148     match = re.match(".*\((.+)\)\r?$", result)
 149     if match:
 150         return match.group(1)
 151     else:
 152         die("Could not determine file type for %s (result: '%s')" % (file, result))
 153
 154 def diffTreePattern():
 155     # This is a simple generator for the diff tree regex pattern. This could be
 156     # a class variable if this and parseDiffTreeEntry were a part of a class.
 157     pattern = re.compile(':(\d+) (\d+) (\w+) (\w+) ([A-Z])(\d+)?\t(.*?)((\t(.*))|$)')
 158     while True:
 159         yield pattern
 160
 161 def parseDiffTreeEntry(entry):
 162     """Parses a single diff tree entry into its component elements.
 163
 164     See git-diff-tree(1) manpage for details about the format of the diff
 165     output. This method returns a dictionary with the following elements:
 166
 167     src_mode - The mode of the source file
 168     dst_mode - The mode of the destination file
 169     src_sha1 - The sha1 for the source file
 170     dst_sha1 - The sha1 fr the destination file
 171     status - The one letter status of the diff (i.e. 'A', 'M', 'D', etc)
 172     status_score - The score for the status (applicable for 'C' and 'R'
 173                    statuses). This is None if there is no score.
 174     src - The path for the source file.
 175     dst - The path for the destination file. This is only present for
 176           copy or renames. If it is not present, this is None.
 177
 178     If the pattern is not matched, None is returned."""
 179
 180     match = diffTreePattern().next().match(entry)
 181     if match:
 182         return {
 183             'src_mode': match.group(1),
 184             'dst_mode': match.group(2),
 185             'src_sha1': match.group(3),
 186             'dst_sha1': match.group(4),
 187             'status': match.group(5),
 188             'status_score': match.group(6),
 189             'src': match.group(7),
 190             'dst': match.group(10)
 191         }
 192     return None
 193
 194 def isModeExec(mode):
 195     # Returns True if the given git mode represents an executable file,
 196     # otherwise False.
 197     return mode[-3:] == "755"
 198
 199 def isModeExecChanged(src_mode, dst_mode):
 200     return isModeExec(src_mode) != isModeExec(dst_mode)
 201
 202 def p4CmdList(cmd, stdin=None, stdin_mode='w+b', cb=None):
 203     cmd = p4_build_cmd("-G %s" % (cmd))
 204     if verbose:
 205         sys.stderr.write("Opening pipe: %s\n" % cmd)
 206
 207     # Use a temporary file to avoid deadlocks without
 208     # subprocess.communicate(), which would put another copy
 209     # of stdout into memory.
 210     stdin_file = None
 211     if stdin is not None:
 212         stdin_file = tempfile.TemporaryFile(prefix='p4-stdin', mode=stdin_mode)
 213         stdin_file.write(stdin)
 214         stdin_file.flush()
 215         stdin_file.seek(0)
 216
 217     p4 = subprocess.Popen(cmd, shell=True,
 218                           stdin=stdin_file,
 219                           stdout=subprocess.PIPE)
 220
 221     result = []
 222     try:
 223         while True:
 224             entry = marshal.load(p4.stdout)
 225             if cb is not None:
 226                 cb(entry)
 227             else:
 228                 result.append(entry)
 229     except EOFError:
 230         pass
 231     exitCode = p4.wait()
 232     if exitCode != 0:
 233         entry = {}
 234         entry["p4ExitCode"] = exitCode
 235         result.append(entry)
 236
 237     return result
 238
 239 def p4Cmd(cmd):
 240     list = p4CmdList(cmd)
 241     result = {}
 242     for entry in list:
 243         result.update(entry)
 244     return result;
 245
 246 def p4Where(depotPath):
 247     if not depotPath.endswith("/"):
 248         depotPath += "/"
 249     depotPath = depotPath + "..."
 250     outputList = p4CmdList("where %s" % depotPath)
 251     output = None
 252     for entry in outputList:
 253         if "depotFile" in entry:
 254             if entry["depotFile"] == depotPath:
 255                 output = entry
 256                 break
 257         elif "data" in entry:
 258             data = entry.get("data")
 259             space = data.find(" ")
 260             if data[:space] == depotPath:
 261                 output = entry
 262                 break
 263     if output == None:
 264         return ""
 265     if output["code"] == "error":
 266         return ""
 267     clientPath = ""
 268     if "path" in output:
 269         clientPath = output.get("path")
 270     elif "data" in output:
 271         data = output.get("data")
 272         lastSpace = data.rfind(" ")
 273         clientPath = data[lastSpace + 1:]
 274
 275     if clientPath.endswith("..."):
 276         clientPath = clientPath[:-3]
 277     return clientPath
 278
 279 def currentGitBranch():
 280     return read_pipe("git name-rev HEAD").split(" ")[1].strip()
 281
 282 def isValidGitDir(path):
 283     if (os.path.exists(path + "/HEAD")
 284         and os.path.exists(path + "/refs") and os.path.exists(path + "/objects")):
 285         return True;
 286     return False
 287
 288 def parseRevision(ref):
 289     return read_pipe("git rev-parse %s" % ref).strip()
 290
 291 def extractLogMessageFromGitCommit(commit):
 292     logMessage = ""
 293
 294     ## fixme: title is first line of commit, not 1st paragraph.
 295     foundTitle = False
 296     for log in read_pipe_lines("git cat-file commit %s" % commit):
 297        if not foundTitle:
 298            if len(log) == 1:
 299                foundTitle = True
 300            continue
 301
 302        logMessage += log
 303     return logMessage
 304
 305 def extractSettingsGitLog(log):
 306     values = {}
 307     for line in log.split("\n"):
 308         line = line.strip()
 309         m = re.search (r"^ *\[git-p4: (.*)\]$", line)
 310         if not m:
 311             continue
 312
 313         assignments = m.group(1).split (':')
 314         for a in assignments:
 315             vals = a.split ('=')
 316             key = vals[0].strip()
 317             val = ('='.join (vals[1:])).strip()
 318             if val.endswith ('\"') and val.startswith('"'):
 319                 val = val[1:-1]
 320
 321             values[key] = val
 322
 323     paths = values.get("depot-paths")
 324     if not paths:
 325         paths = values.get("depot-path")
 326     if paths:
 327         values['depot-paths'] = paths.split(',')
 328     return values
 329
 330 def gitBranchExists(branch):
 331     proc = subprocess.Popen(["git", "rev-parse", branch],
 332                             stderr=subprocess.PIPE, stdout=subprocess.PIPE);
 333     return proc.wait() == 0;
 334
 335 _gitConfig = {}
 336 def gitConfig(key, args = None): # set args to "--bool", for instance
 337     if not _gitConfig.has_key(key):
 338         argsFilter = ""
 339         if args != None:
 340             argsFilter = "%s " % args
 341         cmd = "git config %s%s" % (argsFilter, key)
 342         _gitConfig[key] = read_pipe(cmd, ignore_error=True).strip()
 343     return _gitConfig[key]
 344
 345 def p4BranchesInGit(branchesAreInRemotes = True):
 346     branches = {}
 347
 348     cmdline = "git rev-parse --symbolic "
 349     if branchesAreInRemotes:
 350         cmdline += " --remotes"
 351     else:
 352         cmdline += " --branches"
 353
 354     for line in read_pipe_lines(cmdline):
 355         line = line.strip()
 356
 357         ## only import to p4/
 358         if not line.startswith('p4/') or line == "p4/HEAD":
 359             continue
 360         branch = line
 361
 362         # strip off p4
 363         branch = re.sub ("^p4/", "", line)
 364
 365         branches[branch] = parseRevision(line)
 366     return branches
 367
 368 def findUpstreamBranchPoint(head = "HEAD"):
 369     branches = p4BranchesInGit()
 370     # map from depot-path to branch name
 371     branchByDepotPath = {}
 372     for branch in branches.keys():
 373         tip = branches[branch]
 374         log = extractLogMessageFromGitCommit(tip)
 375         settings = extractSettingsGitLog(log)
 376         if settings.has_key("depot-paths"):
 377             paths = ",".join(settings["depot-paths"])
 378             branchByDepotPath[paths] = "remotes/p4/" + branch
 379
 380     settings = None
 381     parent = 0
 382     while parent < 65535:
 383         commit = head + "~%s" % parent
 384         log = extractLogMessageFromGitCommit(commit)
 385         settings = extractSettingsGitLog(log)
 386         if settings.has_key("depot-paths"):
 387             paths = ",".join(settings["depot-paths"])
 388             if branchByDepotPath.has_key(paths):
 389                 return [branchByDepotPath[paths], settings]
 390
 391         parent = parent + 1
 392
 393     return ["", settings]
 394
 395 def createOrUpdateBranchesFromOrigin(localRefPrefix = "refs/remotes/p4/", silent=True):
 396     if not silent:
 397         print ("Creating/updating branch(es) in %s based on origin branch(es)"
 398                % localRefPrefix)
 399
 400     originPrefix = "origin/p4/"
 401
 402     for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
 403         line = line.strip()
 404         if (not line.startswith(originPrefix)) or line.endswith("HEAD"):
 405             continue
 406
 407         headName = line[len(originPrefix):]
 408         remoteHead = localRefPrefix + headName
 409         originHead = line
 410
 411         original = extractSettingsGitLog(extractLogMessageFromGitCommit(originHead))
 412         if (not original.has_key('depot-paths')
 413             or not original.has_key('change')):
 414             continue
 415
 416         update = False
 417         if not gitBranchExists(remoteHead):
 418             if verbose:
 419                 print "creating %s" % remoteHead
 420             update = True
 421         else:
 422             settings = extractSettingsGitLog(extractLogMessageFromGitCommit(remoteHead))
 423             if settings.has_key('change') > 0:
 424                 if settings['depot-paths'] == original['depot-paths']:
 425                     originP4Change = int(original['change'])
 426                     p4Change = int(settings['change'])
 427                     if originP4Change > p4Change:
 428                         print ("%s (%s) is newer than %s (%s). "
 429                                "Updating p4 branch from origin."
 430                                % (originHead, originP4Change,
 431                                   remoteHead, p4Change))
 432                         update = True
 433                 else:
 434                     print ("Ignoring: %s was imported from %s while "
 435                            "%s was imported from %s"
 436                            % (originHead, ','.join(original['depot-paths']),
 437                               remoteHead, ','.join(settings['depot-paths'])))
 438
 439         if update:
 440             system("git update-ref %s %s" % (remoteHead, originHead))
 441
 442 def originP4BranchesExist():
 443         return gitBranchExists("origin") or gitBranchExists("origin/p4") or gitBranchExists("origin/p4/master")
 444
 445 def p4ChangesForPaths(depotPaths, changeRange):
 446     assert depotPaths
 447     output = p4_read_pipe_lines("changes " + ' '.join (["%s...%s" % (p, changeRange)
 448                                                         for p in depotPaths]))
 449
 450     changes = {}
 451     for line in output:
 452         changeNum = int(line.split(" ")[1])
 453         changes[changeNum] = True
 454
 455     changelist = changes.keys()
 456     changelist.sort()
 457     return changelist
 458
 459 def p4PathStartsWith(path, prefix):
 460     # This method tries to remedy a potential mixed-case issue:
 461     #
 462     # If UserA adds  //depot/DirA/file1
 463     # and UserB adds //depot/dira/file2
 464     #
 465     # we may or may not have a problem. If you have core.ignorecase=true,
 466     # we treat DirA and dira as the same directory
 467     ignorecase = gitConfig("core.ignorecase", "--bool") == "true"
 468     if ignorecase:
 469         return path.lower().startswith(prefix.lower())
 470     return path.startswith(prefix)
 471
 472 class Command:
 473     def __init__(self):
 474         self.usage = "usage: %prog [options]"
 475         self.needsGit = True
 476
 477 class P4Debug(Command):
 478     def __init__(self):
 479         Command.__init__(self)
 480         self.options = [
 481             optparse.make_option("--verbose", dest="verbose", action="store_true",
 482                                  default=False),
 483             ]
 484         self.description = "A tool to debug the output of p4 -G."
 485         self.needsGit = False
 486         self.verbose = False
 487
 488     def run(self, args):
 489         j = 0
 490         for output in p4CmdList(" ".join(args)):
 491             print 'Element: %d' % j
 492             j += 1
 493             print output
 494         return True
 495
 496 class P4RollBack(Command):
 497     def __init__(self):
 498         Command.__init__(self)
 499         self.options = [
 500             optparse.make_option("--verbose", dest="verbose", action="store_true"),
 501             optparse.make_option("--local", dest="rollbackLocalBranches", action="store_true")
 502         ]
 503         self.description = "A tool to debug the multi-branch import. Don't use :)"
 504         self.verbose = False
 505         self.rollbackLocalBranches = False
 506
 507     def run(self, args):
 508         if len(args) != 1:
 509             return False
 510         maxChange = int(args[0])
 511
 512         if "p4ExitCode" in p4Cmd("changes -m 1"):
 513             die("Problems executing p4");
 514
 515         if self.rollbackLocalBranches:
 516             refPrefix = "refs/heads/"
 517             lines = read_pipe_lines("git rev-parse --symbolic --branches")
 518         else:
 519             refPrefix = "refs/remotes/"
 520             lines = read_pipe_lines("git rev-parse --symbolic --remotes")
 521
 522         for line in lines:
 523             if self.rollbackLocalBranches or (line.startswith("p4/") and line != "p4/HEAD\n"):
 524                 line = line.strip()
 525                 ref = refPrefix + line
 526                 log = extractLogMessageFromGitCommit(ref)
 527                 settings = extractSettingsGitLog(log)
 528
 529                 depotPaths = settings['depot-paths']
 530                 change = settings['change']
 531
 532                 changed = False
 533
 534                 if len(p4Cmd("changes -m 1 "  + ' '.join (['%s...@%s' % (p, maxChange)
 535                                                            for p in depotPaths]))) == 0:
 536                     print "Branch %s did not exist at change %s, deleting." % (ref, maxChange)
 537                     system("git update-ref -d %s `git rev-parse %s`" % (ref, ref))
 538                     continue
 539
 540                 while change and int(change) > maxChange:
 541                     changed = True
 542                     if self.verbose:
 543                         print "%s is at %s ; rewinding towards %s" % (ref, change, maxChange)
 544                     system("git update-ref %s \"%s^\"" % (ref, ref))
 545                     log = extractLogMessageFromGitCommit(ref)
 546                     settings =  extractSettingsGitLog(log)
 547
 548
 549                     depotPaths = settings['depot-paths']
 550                     change = settings['change']
 551
 552                 if changed:
 553                     print "%s rewound to %s" % (ref, change)
 554
 555         return True
 556
 557 class P4Submit(Command):
 558     def __init__(self):
 559         Command.__init__(self)
 560         self.options = [
 561                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 562                 optparse.make_option("--origin", dest="origin"),
 563                 optparse.make_option("-M", dest="detectRenames", action="store_true"),
 564         ]
 565         self.description = "Submit changes from git to the perforce depot."
 566         self.usage += " [name of git branch to submit into perforce depot]"
 567         self.interactive = True
 568         self.origin = ""
 569         self.detectRenames = False
 570         self.verbose = False
 571         self.isWindows = (platform.system() == "Windows")
 572
 573     def check(self):
 574         if len(p4CmdList("opened ...")) > 0:
 575             die("You have files opened with perforce! Close them before starting the sync.")
 576
 577     # replaces everything between 'Description:' and the next P4 submit template field with the
 578     # commit message
 579     def prepareLogMessage(self, template, message):
 580         result = ""
 581
 582         inDescriptionSection = False
 583
 584         for line in template.split("\n"):
 585             if line.startswith("#"):
 586                 result += line + "\n"
 587                 continue
 588
 589             if inDescriptionSection:
 590                 if line.startswith("Files:") or line.startswith("Jobs:"):
 591                     inDescriptionSection = False
 592                 else:
 593                     continue
 594             else:
 595                 if line.startswith("Description:"):
 596                     inDescriptionSection = True
 597                     line += "\n"
 598                     for messageLine in message.split("\n"):
 599                         line += "\t" + messageLine + "\n"
 600
 601             result += line + "\n"
 602
 603         return result
 604
 605     def prepareSubmitTemplate(self):
 606         # remove lines in the Files section that show changes to files outside the depot path we're committing into
 607         template = ""
 608         inFilesSection = False
 609         for line in p4_read_pipe_lines("change -o"):
 610             if line.endswith("\r\n"):
 611                 line = line[:-2] + "\n"
 612             if inFilesSection:
 613                 if line.startswith("\t"):
 614                     # path starts and ends with a tab
 615                     path = line[1:]
 616                     lastTab = path.rfind("\t")
 617                     if lastTab != -1:
 618                         path = path[:lastTab]
 619                         if not p4PathStartsWith(path, self.depotPath):
 620                             continue
 621                 else:
 622                     inFilesSection = False
 623             else:
 624                 if line.startswith("Files:"):
 625                     inFilesSection = True
 626
 627             template += line
 628
 629         return template
 630
 631     def applyCommit(self, id):
 632         print "Applying %s" % (read_pipe("git log --max-count=1 --pretty=oneline %s" % id))
 633
 634         if not self.detectRenames:
 635             # If not explicitly set check the config variable
 636             self.detectRenames = gitConfig("git-p4.detectRenames").lower() == "true"
 637
 638         if self.detectRenames:
 639             diffOpts = "-M"
 640         else:
 641             diffOpts = ""
 642
 643         if gitConfig("git-p4.detectCopies").lower() == "true":
 644             diffOpts += " -C"
 645
 646         if gitConfig("git-p4.detectCopiesHarder").lower() == "true":
 647             diffOpts += " --find-copies-harder"
 648
 649         diff = read_pipe_lines("git diff-tree -r %s \"%s^\" \"%s\"" % (diffOpts, id, id))
 650         filesToAdd = set()
 651         filesToDelete = set()
 652         editedFiles = set()
 653         filesToChangeExecBit = {}
 654         for line in diff:
 655             diff = parseDiffTreeEntry(line)
 656             modifier = diff['status']
 657             path = diff['src']
 658             if modifier == "M":
 659                 p4_system("edit \"%s\"" % path)
 660                 if isModeExecChanged(diff['src_mode'], diff['dst_mode']):
 661                     filesToChangeExecBit[path] = diff['dst_mode']
 662                 editedFiles.add(path)
 663             elif modifier == "A":
 664                 filesToAdd.add(path)
 665                 filesToChangeExecBit[path] = diff['dst_mode']
 666                 if path in filesToDelete:
 667                     filesToDelete.remove(path)
 668             elif modifier == "D":
 669                 filesToDelete.add(path)
 670                 if path in filesToAdd:
 671                     filesToAdd.remove(path)
 672             elif modifier == "C":
 673                 src, dest = diff['src'], diff['dst']
 674                 p4_system("integrate -Dt \"%s\" \"%s\"" % (src, dest))
 675                 if diff['src_sha1'] != diff['dst_sha1']:
 676                     p4_system("edit \"%s\"" % (dest))
 677                 if isModeExecChanged(diff['src_mode'], diff['dst_mode']):
 678                     p4_system("edit \"%s\"" % (dest))
 679                     filesToChangeExecBit[dest] = diff['dst_mode']
 680                 os.unlink(dest)
 681                 editedFiles.add(dest)
 682             elif modifier == "R":
 683                 src, dest = diff['src'], diff['dst']
 684                 p4_system("integrate -Dt \"%s\" \"%s\"" % (src, dest))
 685                 if diff['src_sha1'] != diff['dst_sha1']:
 686                     p4_system("edit \"%s\"" % (dest))
 687                 if isModeExecChanged(diff['src_mode'], diff['dst_mode']):
 688                     p4_system("edit \"%s\"" % (dest))
 689                     filesToChangeExecBit[dest] = diff['dst_mode']
 690                 os.unlink(dest)
 691                 editedFiles.add(dest)
 692                 filesToDelete.add(src)
 693             else:
 694                 die("unknown modifier %s for %s" % (modifier, path))
 695
 696         diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
 697         patchcmd = diffcmd + " | git apply "
 698         tryPatchCmd = patchcmd + "--check -"
 699         applyPatchCmd = patchcmd + "--check --apply -"
 700
 701         if os.system(tryPatchCmd) != 0:
 702             print "Unfortunately applying the change failed!"
 703             print "What do you want to do?"
 704             response = "x"
 705             while response != "s" and response != "a" and response != "w":
 706                 response = raw_input("[s]kip this patch / [a]pply the patch forcibly "
 707                                      "and with .rej files / [w]rite the patch to a file (patch.txt) ")
 708             if response == "s":
 709                 print "Skipping! Good luck with the next patches..."
 710                 for f in editedFiles:
 711                     p4_system("revert \"%s\"" % f);
 712                 for f in filesToAdd:
 713                     system("rm %s" %f)
 714                 return
 715             elif response == "a":
 716                 os.system(applyPatchCmd)
 717                 if len(filesToAdd) > 0:
 718                     print "You may also want to call p4 add on the following files:"
 719                     print " ".join(filesToAdd)
 720                 if len(filesToDelete):
 721                     print "The following files should be scheduled for deletion with p4 delete:"
 722                     print " ".join(filesToDelete)
 723                 die("Please resolve and submit the conflict manually and "
 724                     + "continue afterwards with git-p4 submit --continue")
 725             elif response == "w":
 726                 system(diffcmd + " > patch.txt")
 727                 print "Patch saved to patch.txt in %s !" % self.clientPath
 728                 die("Please resolve and submit the conflict manually and "
 729                     "continue afterwards with git-p4 submit --continue")
 730
 731         system(applyPatchCmd)
 732
 733         for f in filesToAdd:
 734             p4_system("add \"%s\"" % f)
 735         for f in filesToDelete:
 736             p4_system("revert \"%s\"" % f)
 737             p4_system("delete \"%s\"" % f)
 738
 739         # Set/clear executable bits
 740         for f in filesToChangeExecBit.keys():
 741             mode = filesToChangeExecBit[f]
 742             setP4ExecBit(f, mode)
 743
 744         logMessage = extractLogMessageFromGitCommit(id)
 745         logMessage = logMessage.strip()
 746
 747         template = self.prepareSubmitTemplate()
 748
 749         if self.interactive:
 750             submitTemplate = self.prepareLogMessage(template, logMessage)
 751             if os.environ.has_key("P4DIFF"):
 752                 del(os.environ["P4DIFF"])
 753             diff = ""
 754             for editedFile in editedFiles:
 755                 diff += p4_read_pipe("diff -du %r" % editedFile)
 756
 757             newdiff = ""
 758             for newFile in filesToAdd:
 759                 newdiff += "==== new file ====\n"
 760                 newdiff += "--- /dev/null\n"
 761                 newdiff += "+++ %s\n" % newFile
 762                 f = open(newFile, "r")
 763                 for line in f.readlines():
 764                     newdiff += "+" + line
 765                 f.close()
 766
 767             separatorLine = "######## everything below this line is just the diff #######\n"
 768
 769             [handle, fileName] = tempfile.mkstemp()
 770             tmpFile = os.fdopen(handle, "w+")
 771             if self.isWindows:
 772                 submitTemplate = submitTemplate.replace("\n", "\r\n")
 773                 separatorLine = separatorLine.replace("\n", "\r\n")
 774                 newdiff = newdiff.replace("\n", "\r\n")
 775             tmpFile.write(submitTemplate + separatorLine + diff + newdiff)
 776             tmpFile.close()
 777             mtime = os.stat(fileName).st_mtime
 778             if os.environ.has_key("P4EDITOR"):
 779                 editor = os.environ.get("P4EDITOR")
 780             else:
 781                 editor = read_pipe("git var GIT_EDITOR").strip()
 782             system(editor + " " + fileName)
 783
 784             response = "y"
 785             if os.stat(fileName).st_mtime <= mtime:
 786                 response = "x"
 787                 while response != "y" and response != "n":
 788                     response = raw_input("Submit template unchanged. Submit anyway? [y]es, [n]o (skip this patch) ")
 789
 790             if response == "y":
 791                 tmpFile = open(fileName, "rb")
 792                 message = tmpFile.read()
 793                 tmpFile.close()
 794                 submitTemplate = message[:message.index(separatorLine)]
 795                 if self.isWindows:
 796                     submitTemplate = submitTemplate.replace("\r\n", "\n")
 797                 p4_write_pipe("submit -i", submitTemplate)
 798             else:
 799                 for f in editedFiles:
 800                     p4_system("revert \"%s\"" % f);
 801                 for f in filesToAdd:
 802                     p4_system("revert \"%s\"" % f);
 803                     system("rm %s" %f)
 804
 805             os.remove(fileName)
 806         else:
 807             fileName = "submit.txt"
 808             file = open(fileName, "w+")
 809             file.write(self.prepareLogMessage(template, logMessage))
 810             file.close()
 811             print ("Perforce submit template written as %s. "
 812                    + "Please review/edit and then use p4 submit -i < %s to submit directly!"
 813                    % (fileName, fileName))
 814
 815     def run(self, args):
 816         if len(args) == 0:
 817             self.master = currentGitBranch()
 818             if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
 819                 die("Detecting current git branch failed!")
 820         elif len(args) == 1:
 821             self.master = args[0]
 822         else:
 823             return False
 824
 825         allowSubmit = gitConfig("git-p4.allowSubmit")
 826         if len(allowSubmit) > 0 and not self.master in allowSubmit.split(","):
 827             die("%s is not in git-p4.allowSubmit" % self.master)
 828
 829         [upstream, settings] = findUpstreamBranchPoint()
 830         self.depotPath = settings['depot-paths'][0]
 831         if len(self.origin) == 0:
 832             self.origin = upstream
 833
 834         if self.verbose:
 835             print "Origin branch is " + self.origin
 836
 837         if len(self.depotPath) == 0:
 838             print "Internal error: cannot locate perforce depot path from existing branches"
 839             sys.exit(128)
 840
 841         self.clientPath = p4Where(self.depotPath)
 842
 843         if len(self.clientPath) == 0:
 844             print "Error: Cannot locate perforce checkout of %s in client view" % self.depotPath
 845             sys.exit(128)
 846
 847         print "Perforce checkout for depot path %s located at %s" % (self.depotPath, self.clientPath)
 848         self.oldWorkingDirectory = os.getcwd()
 849
 850         chdir(self.clientPath)
 851         print "Synchronizing p4 checkout..."
 852         p4_system("sync ...")
 853
 854         self.check()
 855
 856         commits = []
 857         for line in read_pipe_lines("git rev-list --no-merges %s..%s" % (self.origin, self.master)):
 858             commits.append(line.strip())
 859         commits.reverse()
 860
 861         while len(commits) > 0:
 862             commit = commits[0]
 863             commits = commits[1:]
 864             self.applyCommit(commit)
 865             if not self.interactive:
 866                 break
 867
 868         if len(commits) == 0:
 869             print "All changes applied!"
 870             chdir(self.oldWorkingDirectory)
 871
 872             sync = P4Sync()
 873             sync.run([])
 874
 875             rebase = P4Rebase()
 876             rebase.rebase()
 877
 878         return True
 879
 880 class P4Sync(Command):
 881     delete_actions = ( "delete", "move/delete", "purge" )
 882
 883     def __init__(self):
 884         Command.__init__(self)
 885         self.options = [
 886                 optparse.make_option("--branch", dest="branch"),
 887                 optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
 888                 optparse.make_option("--changesfile", dest="changesFile"),
 889                 optparse.make_option("--silent", dest="silent", action="store_true"),
 890                 optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
 891                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 892                 optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false",
 893                                      help="Import into refs/heads/ , not refs/remotes"),
 894                 optparse.make_option("--max-changes", dest="maxChanges"),
 895                 optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true',
 896                                      help="Keep entire BRANCH/DIR/SUBDIR prefix during import"),
 897                 optparse.make_option("--use-client-spec", dest="useClientSpec", action='store_true',
 898                                      help="Only sync files that are included in the Perforce Client Spec")
 899         ]
 900         self.description = """Imports from Perforce into a git repository.\n
 901     example:
 902     //depot/my/project/ -- to import the current head
 903     //depot/my/project/@all -- to import everything
 904     //depot/my/project/@1,6 -- to import only from revision 1 to 6
 905
 906     (a ... is not needed in the path p4 specification, it's added implicitly)"""
 907
 908         self.usage += " //depot/path[@revRange]"
 909         self.silent = False
 910         self.createdBranches = set()
 911         self.committedChanges = set()
 912         self.branch = ""
 913         self.detectBranches = False
 914         self.detectLabels = False
 915         self.changesFile = ""
 916         self.syncWithOrigin = True
 917         self.verbose = False
 918         self.importIntoRemotes = True
 919         self.maxChanges = ""
 920         self.isWindows = (platform.system() == "Windows")
 921         self.keepRepoPath = False
 922         self.depotPaths = None
 923         self.p4BranchesInGit = []
 924         self.cloneExclude = []
 925         self.useClientSpec = False
 926         self.clientSpecDirs = []
 927
 928         if gitConfig("git-p4.syncFromOrigin") == "false":
 929             self.syncWithOrigin = False
 930
 931     #
 932     # P4 wildcards are not allowed in filenames.  P4 complains
 933     # if you simply add them, but you can force it with "-f", in
 934     # which case it translates them into %xx encoding internally.
 935     # Search for and fix just these four characters.  Do % last so
 936     # that fixing it does not inadvertently create new %-escapes.
 937     #
 938     def wildcard_decode(self, path):
 939         # Cannot have * in a filename in windows; untested as to
 940         # what p4 would do in such a case.
 941         if not self.isWindows:
 942             path = path.replace("%2A", "*")
 943         path = path.replace("%23", "#") \
 944                    .replace("%40", "@") \
 945                    .replace("%25", "%")
 946         return path
 947
 948     def extractFilesFromCommit(self, commit):
 949         self.cloneExclude = [re.sub(r"\.\.\.$", "", path)
 950                              for path in self.cloneExclude]
 951         files = []
 952         fnum = 0
 953         while commit.has_key("depotFile%s" % fnum):
 954             path =  commit["depotFile%s" % fnum]
 955
 956             if [p for p in self.cloneExclude
 957                 if p4PathStartsWith(path, p)]:
 958                 found = False
 959             else:
 960                 found = [p for p in self.depotPaths
 961                          if p4PathStartsWith(path, p)]
 962             if not found:
 963                 fnum = fnum + 1
 964                 continue
 965
 966             file = {}
 967             file["path"] = path
 968             file["rev"] = commit["rev%s" % fnum]
 969             file["action"] = commit["action%s" % fnum]
 970             file["type"] = commit["type%s" % fnum]
 971             files.append(file)
 972             fnum = fnum + 1
 973         return files
 974
 975     def stripRepoPath(self, path, prefixes):
 976         if self.useClientSpec:
 977
 978             # if using the client spec, we use the output directory
 979             # specified in the client.  For example, a view
 980             #   //depot/foo/branch/... //client/branch/foo/...
 981             # will end up putting all foo/branch files into
 982             #  branch/foo/
 983             for val in self.clientSpecDirs:
 984                 if path.startswith(val[0]):
 985                     # replace the depot path with the client path
 986                     path = path.replace(val[0], val[1][1])
 987                     # now strip out the client (//client/...)
 988                     path = re.sub("^(//[^/]+/)", '', path)
 989                     # the rest is all path
 990                     return path
 991
 992         if self.keepRepoPath:
 993             prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
 994
 995         for p in prefixes:
 996             if p4PathStartsWith(path, p):
 997                 path = path[len(p):]
 998
 999         return path
1000
1001     def splitFilesIntoBranches(self, commit):
1002         branches = {}
1003         fnum = 0
1004         while commit.has_key("depotFile%s" % fnum):
1005             path =  commit["depotFile%s" % fnum]
1006             found = [p for p in self.depotPaths
1007                      if p4PathStartsWith(path, p)]
1008             if not found:
1009                 fnum = fnum + 1
1010                 continue
1011
1012             file = {}
1013             file["path"] = path
1014             file["rev"] = commit["rev%s" % fnum]
1015             file["action"] = commit["action%s" % fnum]
1016             file["type"] = commit["type%s" % fnum]
1017             fnum = fnum + 1
1018
1019             relPath = self.stripRepoPath(path, self.depotPaths)
1020
1021             for branch in self.knownBranches.keys():
1022
1023                 # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
1024                 if relPath.startswith(branch + "/"):
1025                     if branch not in branches:
1026                         branches[branch] = []
1027                     branches[branch].append(file)
1028                     break
1029
1030         return branches
1031
1032     # output one file from the P4 stream
1033     # - helper for streamP4Files
1034
1035     def streamOneP4File(self, file, contents):
1036         if file["type"] == "apple":
1037             print "\nfile %s is a strange apple file that forks. Ignoring" % \
1038                 file['depotFile']
1039             return
1040
1041         relPath = self.stripRepoPath(file['depotFile'], self.branchPrefixes)
1042         relPath = self.wildcard_decode(relPath)
1043         if verbose:
1044             sys.stderr.write("%s\n" % relPath)
1045
1046         mode = "644"
1047         if isP4Exec(file["type"]):
1048             mode = "755"
1049         elif file["type"] == "symlink":
1050             mode = "120000"
1051             # p4 print on a symlink contains "target\n", so strip it off
1052             data = ''.join(contents)
1053             contents = [data[:-1]]
1054
1055         if self.isWindows and file["type"].endswith("text"):
1056             mangled = []
1057             for data in contents:
1058                 data = data.replace("\r\n", "\n")
1059                 mangled.append(data)
1060             contents = mangled
1061
1062         if file['type'] in ('text+ko', 'unicode+ko', 'binary+ko'):
1063             contents = map(lambda text: re.sub(r'(?i)\$(Id|Header):[^$]*\$',r'$\1$', text), contents)
1064         elif file['type'] in ('text+k', 'ktext', 'kxtext', 'unicode+k', 'binary+k'):
1065             contents = map(lambda text: re.sub(r'\$(Id|Header|Author|Date|DateTime|Change|File|Revision):[^$\n]*\$',r'$\1$', text), contents)
1066
1067         self.gitStream.write("M %s inline %s\n" % (mode, relPath))
1068
1069         # total length...
1070         length = 0
1071         for d in contents:
1072             length = length + len(d)
1073
1074         self.gitStream.write("data %d\n" % length)
1075         for d in contents:
1076             self.gitStream.write(d)
1077         self.gitStream.write("\n")
1078
1079     def streamOneP4Deletion(self, file):
1080         relPath = self.stripRepoPath(file['path'], self.branchPrefixes)
1081         if verbose:
1082             sys.stderr.write("delete %s\n" % relPath)
1083         self.gitStream.write("D %s\n" % relPath)
1084
1085     # handle another chunk of streaming data
1086     def streamP4FilesCb(self, marshalled):
1087
1088         if marshalled.has_key('depotFile') and self.stream_have_file_info:
1089             # start of a new file - output the old one first
1090             self.streamOneP4File(self.stream_file, self.stream_contents)
1091             self.stream_file = {}
1092             self.stream_contents = []
1093             self.stream_have_file_info = False
1094
1095         # pick up the new file information... for the
1096         # 'data' field we need to append to our array
1097         for k in marshalled.keys():
1098             if k == 'data':
1099                 self.stream_contents.append(marshalled['data'])
1100             else:
1101                 self.stream_file[k] = marshalled[k]
1102
1103         self.stream_have_file_info = True
1104
1105     # Stream directly from "p4 files" into "git fast-import"
1106     def streamP4Files(self, files):
1107         filesForCommit = []
1108         filesToRead = []
1109         filesToDelete = []
1110
1111         for f in files:
1112             includeFile = True
1113             for val in self.clientSpecDirs:
1114                 if f['path'].startswith(val[0]):
1115                     if val[1][0] <= 0:
1116                         includeFile = False
1117                     break
1118
1119             if includeFile:
1120                 filesForCommit.append(f)
1121                 if f['action'] in self.delete_actions:
1122                     filesToDelete.append(f)
1123                 else:
1124                     filesToRead.append(f)
1125
1126         # deleted files...
1127         for f in filesToDelete:
1128             self.streamOneP4Deletion(f)
1129
1130         if len(filesToRead) > 0:
1131             self.stream_file = {}
1132             self.stream_contents = []
1133             self.stream_have_file_info = False
1134
1135             # curry self argument
1136             def streamP4FilesCbSelf(entry):
1137                 self.streamP4FilesCb(entry)
1138
1139             p4CmdList("-x - print",
1140                 '\n'.join(['%s#%s' % (f['path'], f['rev'])
1141                                                   for f in filesToRead]),
1142                 cb=streamP4FilesCbSelf)
1143
1144             # do the last chunk
1145             if self.stream_file.has_key('depotFile'):
1146                 self.streamOneP4File(self.stream_file, self.stream_contents)
1147
1148     def commit(self, details, files, branch, branchPrefixes, parent = ""):
1149         epoch = details["time"]
1150         author = details["user"]
1151         self.branchPrefixes = branchPrefixes
1152
1153         if self.verbose:
1154             print "commit into %s" % branch
1155
1156         # start with reading files; if that fails, we should not
1157         # create a commit.
1158         new_files = []
1159         for f in files:
1160             if [p for p in branchPrefixes if p4PathStartsWith(f['path'], p)]:
1161                 new_files.append (f)
1162             else:
1163                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % f['path'])
1164
1165         self.gitStream.write("commit %s\n" % branch)
1166 #        gitStream.write("mark :%s\n" % details["change"])
1167         self.committedChanges.add(int(details["change"]))
1168         committer = ""
1169         if author not in self.users:
1170             self.getUserMapFromPerforceServer()
1171         if author in self.users:
1172             committer = "%s %s %s" % (self.users[author], epoch, self.tz)
1173         else:
1174             committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
1175
1176         self.gitStream.write("committer %s\n" % committer)
1177
1178         self.gitStream.write("data <<EOT\n")
1179         self.gitStream.write(details["desc"])
1180         self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s"
1181                              % (','.join (branchPrefixes), details["change"]))
1182         if len(details['options']) > 0:
1183             self.gitStream.write(": options = %s" % details['options'])
1184         self.gitStream.write("]\nEOT\n\n")
1185
1186         if len(parent) > 0:
1187             if self.verbose:
1188                 print "parent %s" % parent
1189             self.gitStream.write("from %s\n" % parent)
1190
1191         self.streamP4Files(new_files)
1192         self.gitStream.write("\n")
1193
1194         change = int(details["change"])
1195
1196         if self.labels.has_key(change):
1197             label = self.labels[change]
1198             labelDetails = label[0]
1199             labelRevisions = label[1]
1200             if self.verbose:
1201                 print "Change %s is labelled %s" % (change, labelDetails)
1202
1203             files = p4CmdList("files " + ' '.join (["%s...@%s" % (p, change)
1204                                                     for p in branchPrefixes]))
1205
1206             if len(files) == len(labelRevisions):
1207
1208                 cleanedFiles = {}
1209                 for info in files:
1210                     if info["action"] in self.delete_actions:
1211                         continue
1212                     cleanedFiles[info["depotFile"]] = info["rev"]
1213
1214                 if cleanedFiles == labelRevisions:
1215                     self.gitStream.write("tag tag_%s\n" % labelDetails["label"])
1216                     self.gitStream.write("from %s\n" % branch)
1217
1218                     owner = labelDetails["Owner"]
1219                     tagger = ""
1220                     if author in self.users:
1221                         tagger = "%s %s %s" % (self.users[owner], epoch, self.tz)
1222                     else:
1223                         tagger = "%s <a@b> %s %s" % (owner, epoch, self.tz)
1224                     self.gitStream.write("tagger %s\n" % tagger)
1225                     self.gitStream.write("data <<EOT\n")
1226                     self.gitStream.write(labelDetails["Description"])
1227                     self.gitStream.write("EOT\n\n")
1228
1229                 else:
1230                     if not self.silent:
1231                         print ("Tag %s does not match with change %s: files do not match."
1232                                % (labelDetails["label"], change))
1233
1234             else:
1235                 if not self.silent:
1236                     print ("Tag %s does not match with change %s: file count is different."
1237                            % (labelDetails["label"], change))
1238
1239     def getUserCacheFilename(self):
1240         home = os.environ.get("HOME", os.environ.get("USERPROFILE"))
1241         return home + "/.gitp4-usercache.txt"
1242
1243     def getUserMapFromPerforceServer(self):
1244         if self.userMapFromPerforceServer:
1245             return
1246         self.users = {}
1247
1248         for output in p4CmdList("users"):
1249             if not output.has_key("User"):
1250                 continue
1251             self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
1252
1253
1254         s = ''
1255         for (key, val) in self.users.items():
1256             s += "%s\t%s\n" % (key.expandtabs(1), val.expandtabs(1))
1257
1258         open(self.getUserCacheFilename(), "wb").write(s)
1259         self.userMapFromPerforceServer = True
1260
1261     def loadUserMapFromCache(self):
1262         self.users = {}
1263         self.userMapFromPerforceServer = False
1264         try:
1265             cache = open(self.getUserCacheFilename(), "rb")
1266             lines = cache.readlines()
1267             cache.close()
1268             for line in lines:
1269                 entry = line.strip().split("\t")
1270                 self.users[entry[0]] = entry[1]
1271         except IOError:
1272             self.getUserMapFromPerforceServer()
1273
1274     def getLabels(self):
1275         self.labels = {}
1276
1277         l = p4CmdList("labels %s..." % ' '.join (self.depotPaths))
1278         if len(l) > 0 and not self.silent:
1279             print "Finding files belonging to labels in %s" % `self.depotPaths`
1280
1281         for output in l:
1282             label = output["label"]
1283             revisions = {}
1284             newestChange = 0
1285             if self.verbose:
1286                 print "Querying files for label %s" % label
1287             for file in p4CmdList("files "
1288                                   +  ' '.join (["%s...@%s" % (p, label)
1289                                                 for p in self.depotPaths])):
1290                 revisions[file["depotFile"]] = file["rev"]
1291                 change = int(file["change"])
1292                 if change > newestChange:
1293                     newestChange = change
1294
1295             self.labels[newestChange] = [output, revisions]
1296
1297         if self.verbose:
1298             print "Label changes: %s" % self.labels.keys()
1299
1300     def guessProjectName(self):
1301         for p in self.depotPaths:
1302             if p.endswith("/"):
1303                 p = p[:-1]
1304             p = p[p.strip().rfind("/") + 1:]
1305             if not p.endswith("/"):
1306                p += "/"
1307             return p
1308
1309     def getBranchMapping(self):
1310         lostAndFoundBranches = set()
1311
1312         for info in p4CmdList("branches"):
1313             details = p4Cmd("branch -o %s" % info["branch"])
1314             viewIdx = 0
1315             while details.has_key("View%s" % viewIdx):
1316                 paths = details["View%s" % viewIdx].split(" ")
1317                 viewIdx = viewIdx + 1
1318                 # require standard //depot/foo/... //depot/bar/... mapping
1319                 if len(paths) != 2 or not paths[0].endswith("/...") or not paths[1].endswith("/..."):
1320                     continue
1321                 source = paths[0]
1322                 destination = paths[1]
1323                 ## HACK
1324                 if p4PathStartsWith(source, self.depotPaths[0]) and p4PathStartsWith(destination, self.depotPaths[0]):
1325                     source = source[len(self.depotPaths[0]):-4]
1326                     destination = destination[len(self.depotPaths[0]):-4]
1327
1328                     if destination in self.knownBranches:
1329                         if not self.silent:
1330                             print "p4 branch %s defines a mapping from %s to %s" % (info["branch"], source, destination)
1331                             print "but there exists another mapping from %s to %s already!" % (self.knownBranches[destination], destination)
1332                         continue
1333
1334                     self.knownBranches[destination] = source
1335
1336                     lostAndFoundBranches.discard(destination)
1337
1338                     if source not in self.knownBranches:
1339                         lostAndFoundBranches.add(source)
1340
1341
1342         for branch in lostAndFoundBranches:
1343             self.knownBranches[branch] = branch
1344
1345     def getBranchMappingFromGitBranches(self):
1346         branches = p4BranchesInGit(self.importIntoRemotes)
1347         for branch in branches.keys():
1348             if branch == "master":
1349                 branch = "main"
1350             else:
1351                 branch = branch[len(self.projectName):]
1352             self.knownBranches[branch] = branch
1353
1354     def listExistingP4GitBranches(self):
1355         # branches holds mapping from name to commit
1356         branches = p4BranchesInGit(self.importIntoRemotes)
1357         self.p4BranchesInGit = branches.keys()
1358         for branch in branches.keys():
1359             self.initialParents[self.refPrefix + branch] = branches[branch]
1360
1361     def updateOptionDict(self, d):
1362         option_keys = {}
1363         if self.keepRepoPath:
1364             option_keys['keepRepoPath'] = 1
1365
1366         d["options"] = ' '.join(sorted(option_keys.keys()))
1367
1368     def readOptions(self, d):
1369         self.keepRepoPath = (d.has_key('options')
1370                              and ('keepRepoPath' in d['options']))
1371
1372     def gitRefForBranch(self, branch):
1373         if branch == "main":
1374             return self.refPrefix + "master"
1375
1376         if len(branch) <= 0:
1377             return branch
1378
1379         return self.refPrefix + self.projectName + branch
1380
1381     def gitCommitByP4Change(self, ref, change):
1382         if self.verbose:
1383             print "looking in ref " + ref + " for change %s using bisect..." % change
1384
1385         earliestCommit = ""
1386         latestCommit = parseRevision(ref)
1387
1388         while True:
1389             if self.verbose:
1390                 print "trying: earliest %s latest %s" % (earliestCommit, latestCommit)
1391             next = read_pipe("git rev-list --bisect %s %s" % (latestCommit, earliestCommit)).strip()
1392             if len(next) == 0:
1393                 if self.verbose:
1394                     print "argh"
1395                 return ""
1396             log = extractLogMessageFromGitCommit(next)
1397             settings = extractSettingsGitLog(log)
1398             currentChange = int(settings['change'])
1399             if self.verbose:
1400                 print "current change %s" % currentChange
1401
1402             if currentChange == change:
1403                 if self.verbose:
1404                     print "found %s" % next
1405                 return next
1406
1407             if currentChange < change:
1408                 earliestCommit = "^%s" % next
1409             else:
1410                 latestCommit = "%s" % next
1411
1412         return ""
1413
1414     def importNewBranch(self, branch, maxChange):
1415         # make fast-import flush all changes to disk and update the refs using the checkpoint
1416         # command so that we can try to find the branch parent in the git history
1417         self.gitStream.write("checkpoint\n\n");
1418         self.gitStream.flush();
1419         branchPrefix = self.depotPaths[0] + branch + "/"
1420         range = "@1,%s" % maxChange
1421         #print "prefix" + branchPrefix
1422         changes = p4ChangesForPaths([branchPrefix], range)
1423         if len(changes) <= 0:
1424             return False
1425         firstChange = changes[0]
1426         #print "first change in branch: %s" % firstChange
1427         sourceBranch = self.knownBranches[branch]
1428         sourceDepotPath = self.depotPaths[0] + sourceBranch
1429         sourceRef = self.gitRefForBranch(sourceBranch)
1430         #print "source " + sourceBranch
1431
1432         branchParentChange = int(p4Cmd("changes -m 1 %s...@1,%s" % (sourceDepotPath, firstChange))["change"])
1433         #print "branch parent: %s" % branchParentChange
1434         gitParent = self.gitCommitByP4Change(sourceRef, branchParentChange)
1435         if len(gitParent) > 0:
1436             self.initialParents[self.gitRefForBranch(branch)] = gitParent
1437             #print "parent git commit: %s" % gitParent
1438
1439         self.importChanges(changes)
1440         return True
1441
1442     def importChanges(self, changes):
1443         cnt = 1
1444         for change in changes:
1445             description = p4Cmd("describe %s" % change)
1446             self.updateOptionDict(description)
1447
1448             if not self.silent:
1449                 sys.stdout.write("\rImporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
1450                 sys.stdout.flush()
1451             cnt = cnt + 1
1452
1453             try:
1454                 if self.detectBranches:
1455                     branches = self.splitFilesIntoBranches(description)
1456                     for branch in branches.keys():
1457                         ## HACK  --hwn
1458                         branchPrefix = self.depotPaths[0] + branch + "/"
1459
1460                         parent = ""
1461
1462                         filesForCommit = branches[branch]
1463
1464                         if self.verbose:
1465                             print "branch is %s" % branch
1466
1467                         self.updatedBranches.add(branch)
1468
1469                         if branch not in self.createdBranches:
1470                             self.createdBranches.add(branch)
1471                             parent = self.knownBranches[branch]
1472                             if parent == branch:
1473                                 parent = ""
1474                             else:
1475                                 fullBranch = self.projectName + branch
1476                                 if fullBranch not in self.p4BranchesInGit:
1477                                     if not self.silent:
1478                                         print("\n    Importing new branch %s" % fullBranch);
1479                                     if self.importNewBranch(branch, change - 1):
1480                                         parent = ""
1481                                         self.p4BranchesInGit.append(fullBranch)
1482                                     if not self.silent:
1483                                         print("\n    Resuming with change %s" % change);
1484
1485                                 if self.verbose:
1486                                     print "parent determined through known branches: %s" % parent
1487
1488                         branch = self.gitRefForBranch(branch)
1489                         parent = self.gitRefForBranch(parent)
1490
1491                         if self.verbose:
1492                             print "looking for initial parent for %s; current parent is %s" % (branch, parent)
1493
1494                         if len(parent) == 0 and branch in self.initialParents:
1495                             parent = self.initialParents[branch]
1496                             del self.initialParents[branch]
1497
1498                         self.commit(description, filesForCommit, branch, [branchPrefix], parent)
1499                 else:
1500                     files = self.extractFilesFromCommit(description)
1501                     self.commit(description, files, self.branch, self.depotPaths,
1502                                 self.initialParent)
1503                     self.initialParent = ""
1504             except IOError:
1505                 print self.gitError.read()
1506                 sys.exit(1)
1507
1508     def importHeadRevision(self, revision):
1509         print "Doing initial import of %s from revision %s into %s" % (' '.join(self.depotPaths), revision, self.branch)
1510
1511         details = { "user" : "git perforce import user", "time" : int(time.time()) }
1512         details["desc"] = ("Initial import of %s from the state at revision %s\n"
1513                            % (' '.join(self.depotPaths), revision))
1514         details["change"] = revision
1515         newestRevision = 0
1516
1517         fileCnt = 0
1518         for info in p4CmdList("files "
1519                               +  ' '.join(["%s...%s"
1520                                            % (p, revision)
1521                                            for p in self.depotPaths])):
1522
1523             if 'code' in info and info['code'] == 'error':
1524                 sys.stderr.write("p4 returned an error: %s\n"
1525                                  % info['data'])
1526                 if info['data'].find("must refer to client") >= 0:
1527                     sys.stderr.write("This particular p4 error is misleading.\n")
1528                     sys.stderr.write("Perhaps the depot path was misspelled.\n");
1529                     sys.stderr.write("Depot path:  %s\n" % " ".join(self.depotPaths))
1530                 sys.exit(1)
1531             if 'p4ExitCode' in info:
1532                 sys.stderr.write("p4 exitcode: %s\n" % info['p4ExitCode'])
1533                 sys.exit(1)
1534
1535
1536             change = int(info["change"])
1537             if change > newestRevision:
1538                 newestRevision = change
1539
1540             if info["action"] in self.delete_actions:
1541                 # don't increase the file cnt, otherwise details["depotFile123"] will have gaps!
1542                 #fileCnt = fileCnt + 1
1543                 continue
1544
1545             for prop in ["depotFile", "rev", "action", "type" ]:
1546                 details["%s%s" % (prop, fileCnt)] = info[prop]
1547
1548             fileCnt = fileCnt + 1
1549
1550         details["change"] = newestRevision
1551         self.updateOptionDict(details)
1552         try:
1553             self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
1554         except IOError:
1555             print "IO error with git fast-import. Is your git version recent enough?"
1556             print self.gitError.read()
1557
1558
1559     def getClientSpec(self):
1560         specList = p4CmdList( "client -o" )
1561         temp = {}
1562         for entry in specList:
1563             for k,v in entry.iteritems():
1564                 if k.startswith("View"):
1565
1566                     # p4 has these %%1 to %%9 arguments in specs to
1567                     # reorder paths; which we can't handle (yet :)
1568                     if re.match('%%\d', v) != None:
1569                         print "Sorry, can't handle %%n arguments in client specs"
1570                         sys.exit(1)
1571
1572                     if v.startswith('"'):
1573                         start = 1
1574                     else:
1575                         start = 0
1576                     index = v.find("...")
1577
1578                     # save the "client view"; i.e the RHS of the view
1579                     # line that tells the client where to put the
1580                     # files for this view.
1581                     cv = v[index+3:].strip() # +3 to remove previous '...'
1582
1583                     # if the client view doesn't end with a
1584                     # ... wildcard, then we're going to mess up the
1585                     # output directory, so fail gracefully.
1586                     if not cv.endswith('...'):
1587                         print 'Sorry, client view in "%s" needs to end with wildcard' % (k)
1588                         sys.exit(1)
1589                     cv=cv[:-3]
1590
1591                     # now save the view; +index means included, -index
1592                     # means it should be filtered out.
1593                     v = v[start:index]
1594                     if v.startswith("-"):
1595                         v = v[1:]
1596                         include = -len(v)
1597                     else:
1598                         include = len(v)
1599
1600                     temp[v] = (include, cv)
1601
1602         self.clientSpecDirs = temp.items()
1603         self.clientSpecDirs.sort( lambda x, y: abs( y[1][0] ) - abs( x[1][0] ) )
1604
1605     def run(self, args):
1606         self.depotPaths = []
1607         self.changeRange = ""
1608         self.initialParent = ""
1609         self.previousDepotPaths = []
1610
1611         # map from branch depot path to parent branch
1612         self.knownBranches = {}
1613         self.initialParents = {}
1614         self.hasOrigin = originP4BranchesExist()
1615         if not self.syncWithOrigin:
1616             self.hasOrigin = False
1617
1618         if self.importIntoRemotes:
1619             self.refPrefix = "refs/remotes/p4/"
1620         else:
1621             self.refPrefix = "refs/heads/p4/"
1622
1623         if self.syncWithOrigin and self.hasOrigin:
1624             if not self.silent:
1625                 print "Syncing with origin first by calling git fetch origin"
1626             system("git fetch origin")
1627
1628         if len(self.branch) == 0:
1629             self.branch = self.refPrefix + "master"
1630             if gitBranchExists("refs/heads/p4") and self.importIntoRemotes:
1631                 system("git update-ref %s refs/heads/p4" % self.branch)
1632                 system("git branch -D p4");
1633             # create it /after/ importing, when master exists
1634             if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes and gitBranchExists(self.branch):
1635                 system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
1636
1637         if self.useClientSpec or gitConfig("git-p4.useclientspec") == "true":
1638             self.getClientSpec()
1639
1640         # TODO: should always look at previous commits,
1641         # merge with previous imports, if possible.
1642         if args == []:
1643             if self.hasOrigin:
1644                 createOrUpdateBranchesFromOrigin(self.refPrefix, self.silent)
1645             self.listExistingP4GitBranches()
1646
1647             if len(self.p4BranchesInGit) > 1:
1648                 if not self.silent:
1649                     print "Importing from/into multiple branches"
1650                 self.detectBranches = True
1651
1652             if self.verbose:
1653                 print "branches: %s" % self.p4BranchesInGit
1654
1655             p4Change = 0
1656             for branch in self.p4BranchesInGit:
1657                 logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
1658
1659                 settings = extractSettingsGitLog(logMsg)
1660
1661                 self.readOptions(settings)
1662                 if (settings.has_key('depot-paths')
1663                     and settings.has_key ('change')):
1664                     change = int(settings['change']) + 1
1665                     p4Change = max(p4Change, change)
1666
1667                     depotPaths = sorted(settings['depot-paths'])
1668                     if self.previousDepotPaths == []:
1669                         self.previousDepotPaths = depotPaths
1670                     else:
1671                         paths = []
1672                         for (prev, cur) in zip(self.previousDepotPaths, depotPaths):
1673                             for i in range(0, min(len(cur), len(prev))):
1674                                 if cur[i] <> prev[i]:
1675                                     i = i - 1
1676                                     break
1677
1678                             paths.append (cur[:i + 1])
1679
1680                         self.previousDepotPaths = paths
1681
1682             if p4Change > 0:
1683                 self.depotPaths = sorted(self.previousDepotPaths)
1684                 self.changeRange = "@%s,#head" % p4Change
1685                 if not self.detectBranches:
1686                     self.initialParent = parseRevision(self.branch)
1687                 if not self.silent and not self.detectBranches:
1688                     print "Performing incremental import into %s git branch" % self.branch
1689
1690         if not self.branch.startswith("refs/"):
1691             self.branch = "refs/heads/" + self.branch
1692
1693         if len(args) == 0 and self.depotPaths:
1694             if not self.silent:
1695                 print "Depot paths: %s" % ' '.join(self.depotPaths)
1696         else:
1697             if self.depotPaths and self.depotPaths != args:
1698                 print ("previous import used depot path %s and now %s was specified. "
1699                        "This doesn't work!" % (' '.join (self.depotPaths),
1700                                                ' '.join (args)))
1701                 sys.exit(1)
1702
1703             self.depotPaths = sorted(args)
1704
1705         revision = ""
1706         self.users = {}
1707
1708         newPaths = []
1709         for p in self.depotPaths:
1710             if p.find("@") != -1:
1711                 atIdx = p.index("@")
1712                 self.changeRange = p[atIdx:]
1713                 if self.changeRange == "@all":
1714                     self.changeRange = ""
1715                 elif ',' not in self.changeRange:
1716                     revision = self.changeRange
1717                     self.changeRange = ""
1718                 p = p[:atIdx]
1719             elif p.find("#") != -1:
1720                 hashIdx = p.index("#")
1721                 revision = p[hashIdx:]
1722                 p = p[:hashIdx]
1723             elif self.previousDepotPaths == []:
1724                 revision = "#head"
1725
1726             p = re.sub ("\.\.\.$", "", p)
1727             if not p.endswith("/"):
1728                 p += "/"
1729
1730             newPaths.append(p)
1731
1732         self.depotPaths = newPaths
1733
1734
1735         self.loadUserMapFromCache()
1736         self.labels = {}
1737         if self.detectLabels:
1738             self.getLabels();
1739
1740         if self.detectBranches:
1741             ## FIXME - what's a P4 projectName ?
1742             self.projectName = self.guessProjectName()
1743
1744             if self.hasOrigin:
1745                 self.getBranchMappingFromGitBranches()
1746             else:
1747                 self.getBranchMapping()
1748             if self.verbose:
1749                 print "p4-git branches: %s" % self.p4BranchesInGit
1750                 print "initial parents: %s" % self.initialParents
1751             for b in self.p4BranchesInGit:
1752                 if b != "master":
1753
1754                     ## FIXME
1755                     b = b[len(self.projectName):]
1756                 self.createdBranches.add(b)
1757
1758         self.tz = "%+03d%02d" % (- time.timezone / 3600, ((- time.timezone % 3600) / 60))
1759
1760         importProcess = subprocess.Popen(["git", "fast-import"],
1761                                          stdin=subprocess.PIPE, stdout=subprocess.PIPE,
1762                                          stderr=subprocess.PIPE);
1763         self.gitOutput = importProcess.stdout
1764         self.gitStream = importProcess.stdin
1765         self.gitError = importProcess.stderr
1766
1767         if revision:
1768             self.importHeadRevision(revision)
1769         else:
1770             changes = []
1771
1772             if len(self.changesFile) > 0:
1773                 output = open(self.changesFile).readlines()
1774                 changeSet = set()
1775                 for line in output:
1776                     changeSet.add(int(line))
1777
1778                 for change in changeSet:
1779                     changes.append(change)
1780
1781                 changes.sort()
1782             else:
1783                 # catch "git-p4 sync" with no new branches, in a repo that
1784                 # does not have any existing git-p4 branches
1785                 if len(args) == 0 and not self.p4BranchesInGit:
1786                     die("No remote p4 branches.  Perhaps you never did \"git p4 clone\" in here.");
1787                 if self.verbose:
1788                     print "Getting p4 changes for %s...%s" % (', '.join(self.depotPaths),
1789                                                               self.changeRange)
1790                 changes = p4ChangesForPaths(self.depotPaths, self.changeRange)
1791
1792                 if len(self.maxChanges) > 0:
1793                     changes = changes[:min(int(self.maxChanges), len(changes))]
1794
1795             if len(changes) == 0:
1796                 if not self.silent:
1797                     print "No changes to import!"
1798                 return True
1799
1800             if not self.silent and not self.detectBranches:
1801                 print "Import destination: %s" % self.branch
1802
1803             self.updatedBranches = set()
1804
1805             self.importChanges(changes)
1806
1807             if not self.silent:
1808                 print ""
1809                 if len(self.updatedBranches) > 0:
1810                     sys.stdout.write("Updated branches: ")
1811                     for b in self.updatedBranches:
1812                         sys.stdout.write("%s " % b)
1813                     sys.stdout.write("\n")
1814
1815         self.gitStream.close()
1816         if importProcess.wait() != 0:
1817             die("fast-import failed: %s" % self.gitError.read())
1818         self.gitOutput.close()
1819         self.gitError.close()
1820
1821         return True
1822
1823 class P4Rebase(Command):
1824     def __init__(self):
1825         Command.__init__(self)
1826         self.options = [ ]
1827         self.description = ("Fetches the latest revision from perforce and "
1828                             + "rebases the current work (branch) against it")
1829         self.verbose = False
1830
1831     def run(self, args):
1832         sync = P4Sync()
1833         sync.run([])
1834
1835         return self.rebase()
1836
1837     def rebase(self):
1838         if os.system("git update-index --refresh") != 0:
1839             die("Some files in your working directory are modified and different than what is in your index. You can use git update-index <filename> to bring the index up-to-date or stash away all your changes with git stash.");
1840         if len(read_pipe("git diff-index HEAD --")) > 0:
1841             die("You have uncommited changes. Please commit them before rebasing or stash them away with git stash.");
1842
1843         [upstream, settings] = findUpstreamBranchPoint()
1844         if len(upstream) == 0:
1845             die("Cannot find upstream branchpoint for rebase")
1846
1847         # the branchpoint may be p4/foo~3, so strip off the parent
1848         upstream = re.sub("~[0-9]+$", "", upstream)
1849
1850         print "Rebasing the current branch onto %s" % upstream
1851         oldHead = read_pipe("git rev-parse HEAD").strip()
1852         system("git rebase %s" % upstream)
1853         system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
1854         return True
1855
1856 class P4Clone(P4Sync):
1857     def __init__(self):
1858         P4Sync.__init__(self)
1859         self.description = "Creates a new git repository and imports from Perforce into it"
1860         self.usage = "usage: %prog [options] //depot/path[@revRange]"
1861         self.options += [
1862             optparse.make_option("--destination", dest="cloneDestination",
1863                                  action='store', default=None,
1864                                  help="where to leave result of the clone"),
1865             optparse.make_option("-/", dest="cloneExclude",
1866                                  action="append", type="string",
1867                                  help="exclude depot path"),
1868             optparse.make_option("--bare", dest="cloneBare",
1869                                  action="store_true", default=False),
1870         ]
1871         self.cloneDestination = None
1872         self.needsGit = False
1873         self.cloneBare = False
1874
1875     # This is required for the "append" cloneExclude action
1876     def ensure_value(self, attr, value):
1877         if not hasattr(self, attr) or getattr(self, attr) is None:
1878             setattr(self, attr, value)
1879         return getattr(self, attr)
1880
1881     def defaultDestination(self, args):
1882         ## TODO: use common prefix of args?
1883         depotPath = args[0]
1884         depotDir = re.sub("(@[^@]*)$", "", depotPath)
1885         depotDir = re.sub("(#[^#]*)$", "", depotDir)
1886         depotDir = re.sub(r"\.\.\.$", "", depotDir)
1887         depotDir = re.sub(r"/$", "", depotDir)
1888         return os.path.split(depotDir)[1]
1889
1890     def run(self, args):
1891         if len(args) < 1:
1892             return False
1893
1894         if self.keepRepoPath and not self.cloneDestination:
1895             sys.stderr.write("Must specify destination for --keep-path\n")
1896             sys.exit(1)
1897
1898         depotPaths = args
1899
1900         if not self.cloneDestination and len(depotPaths) > 1:
1901             self.cloneDestination = depotPaths[-1]
1902             depotPaths = depotPaths[:-1]
1903
1904         self.cloneExclude = ["/"+p for p in self.cloneExclude]
1905         for p in depotPaths:
1906             if not p.startswith("//"):
1907                 return False
1908
1909         if not self.cloneDestination:
1910             self.cloneDestination = self.defaultDestination(args)
1911
1912         print "Importing from %s into %s" % (', '.join(depotPaths), self.cloneDestination)
1913
1914         if not os.path.exists(self.cloneDestination):
1915             os.makedirs(self.cloneDestination)
1916         chdir(self.cloneDestination)
1917
1918         init_cmd = [ "git", "init" ]
1919         if self.cloneBare:
1920             init_cmd.append("--bare")
1921         subprocess.check_call(init_cmd)
1922
1923         if not P4Sync.run(self, depotPaths):
1924             return False
1925         if self.branch != "master":
1926             if self.importIntoRemotes:
1927                 masterbranch = "refs/remotes/p4/master"
1928             else:
1929                 masterbranch = "refs/heads/p4/master"
1930             if gitBranchExists(masterbranch):
1931                 system("git branch master %s" % masterbranch)
1932                 if not self.cloneBare:
1933                     system("git checkout -f")
1934             else:
1935                 print "Could not detect main branch. No checkout/master branch created."
1936
1937         return True
1938
1939 class P4Branches(Command):
1940     def __init__(self):
1941         Command.__init__(self)
1942         self.options = [ ]
1943         self.description = ("Shows the git branches that hold imports and their "
1944                             + "corresponding perforce depot paths")
1945         self.verbose = False
1946
1947     def run(self, args):
1948         if originP4BranchesExist():
1949             createOrUpdateBranchesFromOrigin()
1950
1951         cmdline = "git rev-parse --symbolic "
1952         cmdline += " --remotes"
1953
1954         for line in read_pipe_lines(cmdline):
1955             line = line.strip()
1956
1957             if not line.startswith('p4/') or line == "p4/HEAD":
1958                 continue
1959             branch = line
1960
1961             log = extractLogMessageFromGitCommit("refs/remotes/%s" % branch)
1962             settings = extractSettingsGitLog(log)
1963
1964             print "%s <= %s (%s)" % (branch, ",".join(settings["depot-paths"]), settings["change"])
1965         return True
1966
1967 class HelpFormatter(optparse.IndentedHelpFormatter):
1968     def __init__(self):
1969         optparse.IndentedHelpFormatter.__init__(self)
1970
1971     def format_description(self, description):
1972         if description:
1973             return description + "\n"
1974         else:
1975             return ""
1976
1977 def printUsage(commands):
1978     print "usage: %s <command> [options]" % sys.argv[0]
1979     print ""
1980     print "valid commands: %s" % ", ".join(commands)
1981     print ""
1982     print "Try %s <command> --help for command specific help." % sys.argv[0]
1983     print ""
1984
1985 commands = {
1986     "debug" : P4Debug,
1987     "submit" : P4Submit,
1988     "commit" : P4Submit,
1989     "sync" : P4Sync,
1990     "rebase" : P4Rebase,
1991     "clone" : P4Clone,
1992     "rollback" : P4RollBack,
1993     "branches" : P4Branches
1994 }
1995
1996
1997 def main():
1998     if len(sys.argv[1:]) == 0:
1999         printUsage(commands.keys())
2000         sys.exit(2)
2001
2002     cmd = ""
2003     cmdName = sys.argv[1]
2004     try:
2005         klass = commands[cmdName]
2006         cmd = klass()
2007     except KeyError:
2008         print "unknown command %s" % cmdName
2009         print ""
2010         printUsage(commands.keys())
2011         sys.exit(2)
2012
2013     options = cmd.options
2014     cmd.gitdir = os.environ.get("GIT_DIR", None)
2015
2016     args = sys.argv[2:]
2017
2018     if len(options) > 0:
2019         options.append(optparse.make_option("--git-dir", dest="gitdir"))
2020
2021         parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
2022                                        options,
2023                                        description = cmd.description,
2024                                        formatter = HelpFormatter())
2025
2026         (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
2027     global verbose
2028     verbose = cmd.verbose
2029     if cmd.needsGit:
2030         if cmd.gitdir == None:
2031             cmd.gitdir = os.path.abspath(".git")
2032             if not isValidGitDir(cmd.gitdir):
2033                 cmd.gitdir = read_pipe("git rev-parse --git-dir").strip()
2034                 if os.path.exists(cmd.gitdir):
2035                     cdup = read_pipe("git rev-parse --show-cdup").strip()
2036                     if len(cdup) > 0:
2037                         chdir(cdup);
2038
2039         if not isValidGitDir(cmd.gitdir):
2040             if isValidGitDir(cmd.gitdir + "/.git"):
2041                 cmd.gitdir += "/.git"
2042             else:
2043                 die("fatal: cannot locate git repository at %s" % cmd.gitdir)
2044
2045         os.environ["GIT_DIR"] = cmd.gitdir
2046
2047     if not cmd.run(args):
2048         parser.print_help()
2049
2050
2051 if __name__ == '__main__':
2052     main()