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 <hausmann@kde.org>
   6 # Copyright: 2007 Simon Hausmann <hausmann@kde.org>
   7 #            2007 Trolltech ASA
   8 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
   9 #
  10
  11 import optparse, sys, os, marshal, popen2, shelve
  12 import tempfile, getopt, sha, os.path, time
  13 from sets import Set;
  14
  15 gitdir = os.environ.get("GIT_DIR", "")
  16
  17 def p4CmdList(cmd):
  18     cmd = "p4 -G %s" % cmd
  19     pipe = os.popen(cmd, "rb")
  20
  21     result = []
  22     try:
  23         while True:
  24             entry = marshal.load(pipe)
  25             result.append(entry)
  26     except EOFError:
  27         pass
  28     pipe.close()
  29
  30     return result
  31
  32 def p4Cmd(cmd):
  33     list = p4CmdList(cmd)
  34     result = {}
  35     for entry in list:
  36         result.update(entry)
  37     return result;
  38
  39 def die(msg):
  40     sys.stderr.write(msg + "\n")
  41     sys.exit(1)
  42
  43 def currentGitBranch():
  44     return os.popen("git-name-rev HEAD").read().split(" ")[1][:-1]
  45
  46 def isValidGitDir(path):
  47     if os.path.exists(path + "/HEAD") and os.path.exists(path + "/refs") and os.path.exists(path + "/objects"):
  48         return True;
  49     return False
  50
  51 def system(cmd):
  52     if os.system(cmd) != 0:
  53         die("command failed: %s" % cmd)
  54
  55 class Command:
  56     def __init__(self):
  57         self.usage = "usage: %prog [options]"
  58
  59 class P4Debug(Command):
  60     def __init__(self):
  61         self.options = [
  62         ]
  63         self.description = "A tool to debug the output of p4 -G."
  64
  65     def run(self, args):
  66         for output in p4CmdList(" ".join(args)):
  67             print output
  68         return True
  69
  70 class P4CleanTags(Command):
  71     def __init__(self):
  72         Command.__init__(self)
  73         self.options = [
  74 #                optparse.make_option("--branch", dest="branch", default="refs/heads/master")
  75         ]
  76         self.description = "A tool to remove stale unused tags from incremental perforce imports."
  77     def run(self, args):
  78         branch = currentGitBranch()
  79         print "Cleaning out stale p4 import tags..."
  80         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
  81         output = sout.read()
  82         try:
  83             tagIdx = output.index(" tags/p4/")
  84         except:
  85             print "Cannot find any p4/* tag. Nothing to do."
  86             sys.exit(0)
  87
  88         try:
  89             caretIdx = output.index("^")
  90         except:
  91             caretIdx = len(output) - 1
  92         rev = int(output[tagIdx + 9 : caretIdx])
  93
  94         allTags = os.popen("git tag -l p4/").readlines()
  95         for i in range(len(allTags)):
  96             allTags[i] = int(allTags[i][3:-1])
  97
  98         allTags.sort()
  99
 100         allTags.remove(rev)
 101
 102         for rev in allTags:
 103             print os.popen("git tag -d p4/%s" % rev).read()
 104
 105         print "%s tags removed." % len(allTags)
 106         return True
 107
 108 class P4Sync(Command):
 109     def __init__(self):
 110         Command.__init__(self)
 111         self.options = [
 112                 optparse.make_option("--continue", action="store_false", dest="firstTime"),
 113                 optparse.make_option("--origin", dest="origin"),
 114                 optparse.make_option("--reset", action="store_true", dest="reset"),
 115                 optparse.make_option("--master", dest="master"),
 116                 optparse.make_option("--log-substitutions", dest="substFile"),
 117                 optparse.make_option("--noninteractive", action="store_false"),
 118                 optparse.make_option("--dry-run", action="store_true"),
 119                 optparse.make_option("--apply-as-patch", action="store_true", dest="applyAsPatch")
 120         ]
 121         self.description = "Submit changes from git to the perforce depot."
 122         self.firstTime = True
 123         self.reset = False
 124         self.interactive = True
 125         self.dryRun = False
 126         self.substFile = ""
 127         self.firstTime = True
 128         self.origin = "origin"
 129         self.master = ""
 130         self.applyAsPatch = True
 131
 132         self.logSubstitutions = {}
 133         self.logSubstitutions["<enter description here>"] = "%log%"
 134         self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
 135
 136     def check(self):
 137         if len(p4CmdList("opened ...")) > 0:
 138             die("You have files opened with perforce! Close them before starting the sync.")
 139
 140     def start(self):
 141         if len(self.config) > 0 and not self.reset:
 142             die("Cannot start sync. Previous sync config found at %s" % self.configFile)
 143
 144         commits = []
 145         for line in os.popen("git-rev-list --no-merges %s..%s" % (self.origin, self.master)).readlines():
 146             commits.append(line[:-1])
 147         commits.reverse()
 148
 149         self.config["commits"] = commits
 150
 151         if not self.applyAsPatch:
 152             print "Creating temporary p4-sync branch from %s ..." % self.origin
 153             system("git checkout -f -b p4-sync %s" % self.origin)
 154
 155     def prepareLogMessage(self, template, message):
 156         result = ""
 157
 158         for line in template.split("\n"):
 159             if line.startswith("#"):
 160                 result += line + "\n"
 161                 continue
 162
 163             substituted = False
 164             for key in self.logSubstitutions.keys():
 165                 if line.find(key) != -1:
 166                     value = self.logSubstitutions[key]
 167                     value = value.replace("%log%", message)
 168                     if value != "@remove@":
 169                         result += line.replace(key, value) + "\n"
 170                     substituted = True
 171                     break
 172
 173             if not substituted:
 174                 result += line + "\n"
 175
 176         return result
 177
 178     def apply(self, id):
 179         print "Applying %s" % (os.popen("git-log --max-count=1 --pretty=oneline %s" % id).read())
 180         diff = os.popen("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id)).readlines()
 181         filesToAdd = set()
 182         filesToDelete = set()
 183         for line in diff:
 184             modifier = line[0]
 185             path = line[1:].strip()
 186             if modifier == "M":
 187                 system("p4 edit %s" % path)
 188             elif modifier == "A":
 189                 filesToAdd.add(path)
 190                 if path in filesToDelete:
 191                     filesToDelete.remove(path)
 192             elif modifier == "D":
 193                 filesToDelete.add(path)
 194                 if path in filesToAdd:
 195                     filesToAdd.remove(path)
 196             else:
 197                 die("unknown modifier %s for %s" % (modifier, path))
 198
 199         if self.applyAsPatch:
 200             system("git-diff-tree -p --diff-filter=ACMRTUXB \"%s^\" \"%s\" | patch -p1" % (id, id))
 201         else:
 202             system("git-diff-files --name-only -z | git-update-index --remove -z --stdin")
 203             system("git cherry-pick --no-commit \"%s\"" % id)
 204
 205         for f in filesToAdd:
 206             system("p4 add %s" % f)
 207         for f in filesToDelete:
 208             system("p4 revert %s" % f)
 209             system("p4 delete %s" % f)
 210
 211         logMessage = ""
 212         foundTitle = False
 213         for log in os.popen("git-cat-file commit %s" % id).readlines():
 214             if not foundTitle:
 215                 if len(log) == 1:
 216                     foundTitle = 1
 217                 continue
 218
 219             if len(logMessage) > 0:
 220                 logMessage += "\t"
 221             logMessage += log
 222
 223         template = os.popen("p4 change -o").read()
 224
 225         if self.interactive:
 226             submitTemplate = self.prepareLogMessage(template, logMessage)
 227             diff = os.popen("p4 diff -du ...").read()
 228
 229             for newFile in filesToAdd:
 230                 diff += "==== new file ====\n"
 231                 diff += "--- /dev/null\n"
 232                 diff += "+++ %s\n" % newFile
 233                 f = open(newFile, "r")
 234                 for line in f.readlines():
 235                     diff += "+" + line
 236                 f.close()
 237
 238             separatorLine = "######## everything below this line is just the diff #######\n"
 239
 240             response = "e"
 241             firstIteration = True
 242             while response == "e":
 243                 if not firstIteration:
 244                     response = raw_input("Do you want to submit this change (y/e/n)? ")
 245                 firstIteration = False
 246                 if response == "e":
 247                     [handle, fileName] = tempfile.mkstemp()
 248                     tmpFile = os.fdopen(handle, "w+")
 249                     tmpFile.write(submitTemplate + separatorLine + diff)
 250                     tmpFile.close()
 251                     editor = os.environ.get("EDITOR", "vi")
 252                     system(editor + " " + fileName)
 253                     tmpFile = open(fileName, "r")
 254                     message = tmpFile.read()
 255                     tmpFile.close()
 256                     os.remove(fileName)
 257                     submitTemplate = message[:message.index(separatorLine)]
 258
 259             if response == "y" or response == "yes":
 260                if self.dryRun:
 261                    print submitTemplate
 262                    raw_input("Press return to continue...")
 263                else:
 264                     pipe = os.popen("p4 submit -i", "w")
 265                     pipe.write(submitTemplate)
 266                     pipe.close()
 267             else:
 268                 print "Not submitting!"
 269                 self.interactive = False
 270         else:
 271             fileName = "submit.txt"
 272             file = open(fileName, "w+")
 273             file.write(self.prepareLogMessage(template, logMessage))
 274             file.close()
 275             print "Perforce submit template written as %s. Please review/edit and then use p4 submit -i < %s to submit directly!" % (fileName, fileName)
 276
 277     def run(self, args):
 278         if self.reset:
 279             self.firstTime = True
 280
 281         if len(self.substFile) > 0:
 282             for line in open(self.substFile, "r").readlines():
 283                 tokens = line[:-1].split("=")
 284                 self.logSubstitutions[tokens[0]] = tokens[1]
 285
 286         if len(self.master) == 0:
 287             self.master = currentGitBranch()
 288             if len(self.master) == 0 or not os.path.exists("%s/refs/heads/%s" % (gitdir, self.master)):
 289                 die("Detecting current git branch failed!")
 290
 291         self.check()
 292         self.configFile = gitdir + "/p4-git-sync.cfg"
 293         self.config = shelve.open(self.configFile, writeback=True)
 294
 295         if self.firstTime:
 296             self.start()
 297
 298         commits = self.config.get("commits", [])
 299
 300         while len(commits) > 0:
 301             self.firstTime = False
 302             commit = commits[0]
 303             commits = commits[1:]
 304             self.config["commits"] = commits
 305             self.apply(commit)
 306             if not self.interactive:
 307                 break
 308
 309         self.config.close()
 310
 311         if len(commits) == 0:
 312             if self.firstTime:
 313                 print "No changes found to apply between %s and current HEAD" % self.origin
 314             else:
 315                 print "All changes applied!"
 316                 if not self.applyAsPatch:
 317                     print "Deleting temporary p4-sync branch and going back to %s" % self.master
 318                     system("git checkout %s" % self.master)
 319                     system("git branch -D p4-sync")
 320                     print "Cleaning out your perforce checkout by doing p4 edit ... ; p4 revert ..."
 321                     system("p4 edit ... >/dev/null")
 322                     system("p4 revert ... >/dev/null")
 323             os.remove(self.configFile)
 324
 325         return True
 326
 327 class GitSync(Command):
 328     def __init__(self):
 329         Command.__init__(self)
 330         self.options = [
 331                 optparse.make_option("--branch", dest="branch"),
 332                 optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
 333                 optparse.make_option("--changesfile", dest="changesFile"),
 334                 optparse.make_option("--silent", dest="silent", action="store_true"),
 335                 optparse.make_option("--known-branches", dest="knownBranches"),
 336                 optparse.make_option("--cache", dest="doCache", action="store_true"),
 337                 optparse.make_option("--command-cache", dest="commandCache", action="store_true")
 338         ]
 339         self.description = """Imports from Perforce into a git repository.\n
 340     example:
 341     //depot/my/project/ -- to import the current head
 342     //depot/my/project/@all -- to import everything
 343     //depot/my/project/@1,6 -- to import only from revision 1 to 6
 344
 345     (a ... is not needed in the path p4 specification, it's added implicitly)"""
 346
 347         self.usage += " //depot/path[@revRange]"
 348
 349         self.dataCache = False
 350         self.commandCache = False
 351         self.silent = False
 352         self.knownBranches = Set()
 353         self.createdBranches = Set()
 354         self.committedChanges = Set()
 355         self.branch = "p4"
 356         self.detectBranches = False
 357         self.changesFile = ""
 358
 359     def p4File(self, depotPath):
 360         return os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 361
 362     def extractFilesFromCommit(self, commit):
 363         files = []
 364         fnum = 0
 365         while commit.has_key("depotFile%s" % fnum):
 366             path =  commit["depotFile%s" % fnum]
 367             if not path.startswith(self.globalPrefix):
 368     #            if not self.silent:
 369     #                print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, self.globalPrefix, change)
 370                 fnum = fnum + 1
 371                 continue
 372
 373             file = {}
 374             file["path"] = path
 375             file["rev"] = commit["rev%s" % fnum]
 376             file["action"] = commit["action%s" % fnum]
 377             file["type"] = commit["type%s" % fnum]
 378             files.append(file)
 379             fnum = fnum + 1
 380         return files
 381
 382     def isSubPathOf(self, first, second):
 383         if not first.startswith(second):
 384             return False
 385         if first == second:
 386             return True
 387         return first[len(second)] == "/"
 388
 389     def branchesForCommit(self, files):
 390         branches = Set()
 391
 392         for file in files:
 393             relativePath = file["path"][len(self.globalPrefix):]
 394             # strip off the filename
 395             relativePath = relativePath[0:relativePath.rfind("/")]
 396
 397     #        if len(branches) == 0:
 398     #            branches.add(relativePath)
 399     #            knownBranches.add(relativePath)
 400     #            continue
 401
 402             ###### this needs more testing :)
 403             knownBranch = False
 404             for branch in branches:
 405                 if relativePath == branch:
 406                     knownBranch = True
 407                     break
 408     #            if relativePath.startswith(branch):
 409                 if self.isSubPathOf(relativePath, branch):
 410                     knownBranch = True
 411                     break
 412     #            if branch.startswith(relativePath):
 413                 if self.isSubPathOf(branch, relativePath):
 414                     branches.remove(branch)
 415                     break
 416
 417             if knownBranch:
 418                 continue
 419
 420             for branch in knownBranches:
 421                 #if relativePath.startswith(branch):
 422                 if self.isSubPathOf(relativePath, branch):
 423                     if len(branches) == 0:
 424                         relativePath = branch
 425                     else:
 426                         knownBranch = True
 427                     break
 428
 429             if knownBranch:
 430                 continue
 431
 432             branches.add(relativePath)
 433             self.knownBranches.add(relativePath)
 434
 435         return branches
 436
 437     def findBranchParent(self, branchPrefix, files):
 438         for file in files:
 439             path = file["path"]
 440             if not path.startswith(branchPrefix):
 441                 continue
 442             action = file["action"]
 443             if action != "integrate" and action != "branch":
 444                 continue
 445             rev = file["rev"]
 446             depotPath = path + "#" + rev
 447
 448             log = p4CmdList("filelog \"%s\"" % depotPath)
 449             if len(log) != 1:
 450                 print "eek! I got confused by the filelog of %s" % depotPath
 451                 sys.exit(1);
 452
 453             log = log[0]
 454             if log["action0"] != action:
 455                 print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
 456                 sys.exit(1);
 457
 458             branchAction = log["how0,0"]
 459     #        if branchAction == "branch into" or branchAction == "ignored":
 460     #            continue # ignore for branching
 461
 462             if not branchAction.endswith(" from"):
 463                 continue # ignore for branching
 464     #            print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
 465     #            sys.exit(1);
 466
 467             source = log["file0,0"]
 468             if source.startswith(branchPrefix):
 469                 continue
 470
 471             lastSourceRev = log["erev0,0"]
 472
 473             sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
 474             if len(sourceLog) != 1:
 475                 print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
 476                 sys.exit(1);
 477             sourceLog = sourceLog[0]
 478
 479             relPath = source[len(self.globalPrefix):]
 480             # strip off the filename
 481             relPath = relPath[0:relPath.rfind("/")]
 482
 483             for branch in self.knownBranches:
 484                 if self.isSubPathOf(relPath, branch):
 485     #                print "determined parent branch branch %s due to change in file %s" % (branch, source)
 486                     return branch
 487     #            else:
 488     #                print "%s is not a subpath of branch %s" % (relPath, branch)
 489
 490         return ""
 491
 492     def commit(self, details, files, branch, branchPrefix, parent = "", merged = ""):
 493         epoch = details["time"]
 494         author = details["user"]
 495
 496         self.gitStream.write("commit %s\n" % branch)
 497     #    gitStream.write("mark :%s\n" % details["change"])
 498         self.committedChanges.add(int(details["change"]))
 499         committer = ""
 500         if author in self.users:
 501             committer = "%s %s %s" % (self.users[author], epoch, self.tz)
 502         else:
 503             committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
 504
 505         self.gitStream.write("committer %s\n" % committer)
 506
 507         self.gitStream.write("data <<EOT\n")
 508         self.gitStream.write(details["desc"])
 509         self.gitStream.write("\n[git-p4: depot-path: \"%s\"; change: %s]\n" % (branchPrefix, details["change"]))
 510         self.gitStream.write("EOT\n\n")
 511
 512         if len(parent) > 0:
 513             self.gitStream.write("from %s\n" % parent)
 514
 515         if len(merged) > 0:
 516             self.gitStream.write("merge %s\n" % merged)
 517
 518         for file in files:
 519             path = file["path"]
 520             if not path.startswith(branchPrefix):
 521     #            if not silent:
 522     #                print "\nchanged files: ignoring path %s outside of branch prefix %s in change %s" % (path, branchPrefix, details["change"])
 523                 continue
 524             rev = file["rev"]
 525             depotPath = path + "#" + rev
 526             relPath = path[len(branchPrefix):]
 527             action = file["action"]
 528
 529             if file["type"] == "apple":
 530                 print "\nfile %s is a strange apple file that forks. Ignoring!" % path
 531                 continue
 532
 533             if action == "delete":
 534                 self.gitStream.write("D %s\n" % relPath)
 535             else:
 536                 mode = 644
 537                 if file["type"].startswith("x"):
 538                     mode = 755
 539
 540                 data = self.p4File(depotPath)
 541
 542                 self.gitStream.write("M %s inline %s\n" % (mode, relPath))
 543                 self.gitStream.write("data %s\n" % len(data))
 544                 self.gitStream.write(data)
 545                 self.gitStream.write("\n")
 546
 547         self.gitStream.write("\n")
 548
 549         self.lastChange = int(details["change"])
 550
 551     def extractFilesInCommitToBranch(self, files, branchPrefix):
 552         newFiles = []
 553
 554         for file in files:
 555             path = file["path"]
 556             if path.startswith(branchPrefix):
 557                 newFiles.append(file)
 558
 559         return newFiles
 560
 561     def findBranchSourceHeuristic(self, files, branch, branchPrefix):
 562         for file in files:
 563             action = file["action"]
 564             if action != "integrate" and action != "branch":
 565                 continue
 566             path = file["path"]
 567             rev = file["rev"]
 568             depotPath = path + "#" + rev
 569
 570             log = p4CmdList("filelog \"%s\"" % depotPath)
 571             if len(log) != 1:
 572                 print "eek! I got confused by the filelog of %s" % depotPath
 573                 sys.exit(1);
 574
 575             log = log[0]
 576             if log["action0"] != action:
 577                 print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
 578                 sys.exit(1);
 579
 580             branchAction = log["how0,0"]
 581
 582             if not branchAction.endswith(" from"):
 583                 continue # ignore for branching
 584     #            print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
 585     #            sys.exit(1);
 586
 587             source = log["file0,0"]
 588             if source.startswith(branchPrefix):
 589                 continue
 590
 591             lastSourceRev = log["erev0,0"]
 592
 593             sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
 594             if len(sourceLog) != 1:
 595                 print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
 596                 sys.exit(1);
 597             sourceLog = sourceLog[0]
 598
 599             relPath = source[len(self.globalPrefix):]
 600             # strip off the filename
 601             relPath = relPath[0:relPath.rfind("/")]
 602
 603             for candidate in self.knownBranches:
 604                 if self.isSubPathOf(relPath, candidate) and candidate != branch:
 605                     return candidate
 606
 607         return ""
 608
 609     def changeIsBranchMerge(self, sourceBranch, destinationBranch, change):
 610         sourceFiles = {}
 611         for file in p4CmdList("files %s...@%s" % (self.globalPrefix + sourceBranch + "/", change)):
 612             if file["action"] == "delete":
 613                 continue
 614             sourceFiles[file["depotFile"]] = file
 615
 616         destinationFiles = {}
 617         for file in p4CmdList("files %s...@%s" % (self.globalPrefix + destinationBranch + "/", change)):
 618             destinationFiles[file["depotFile"]] = file
 619
 620         for fileName in sourceFiles.keys():
 621             integrations = []
 622             deleted = False
 623             integrationCount = 0
 624             for integration in p4CmdList("integrated \"%s\"" % fileName):
 625                 toFile = integration["fromFile"] # yes, it's true, it's fromFile
 626                 if not toFile in destinationFiles:
 627                     continue
 628                 destFile = destinationFiles[toFile]
 629                 if destFile["action"] == "delete":
 630     #                print "file %s has been deleted in %s" % (fileName, toFile)
 631                     deleted = True
 632                     break
 633                 integrationCount += 1
 634                 if integration["how"] == "branch from":
 635                     continue
 636
 637                 if int(integration["change"]) == change:
 638                     integrations.append(integration)
 639                     continue
 640                 if int(integration["change"]) > change:
 641                     continue
 642
 643                 destRev = int(destFile["rev"])
 644
 645                 startRev = integration["startFromRev"][1:]
 646                 if startRev == "none":
 647                     startRev = 0
 648                 else:
 649                     startRev = int(startRev)
 650
 651                 endRev = integration["endFromRev"][1:]
 652                 if endRev == "none":
 653                     endRev = 0
 654                 else:
 655                     endRev = int(endRev)
 656
 657                 initialBranch = (destRev == 1 and integration["how"] != "branch into")
 658                 inRange = (destRev >= startRev and destRev <= endRev)
 659                 newer = (destRev > startRev and destRev > endRev)
 660
 661                 if initialBranch or inRange or newer:
 662                     integrations.append(integration)
 663
 664             if deleted:
 665                 continue
 666
 667             if len(integrations) == 0 and integrationCount > 1:
 668                 print "file %s was not integrated from %s into %s" % (fileName, sourceBranch, destinationBranch)
 669                 return False
 670
 671         return True
 672
 673     def getUserMap(self):
 674         self.users = {}
 675
 676         for output in p4CmdList("users"):
 677             if not output.has_key("User"):
 678                 continue
 679             self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 680
 681     def run(self, args):
 682         self.branch = "refs/heads/" + self.branch
 683         self.globalPrefix = self.previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
 684         if len(self.globalPrefix) != 0:
 685             self.globalPrefix = self.globalPrefix[:-1]
 686
 687         if len(args) == 0 and len(self.globalPrefix) != 0:
 688             if not self.silent:
 689                 print "[using previously specified depot path %s]" % self.globalPrefix
 690         elif len(args) != 1:
 691             return False
 692         else:
 693             if len(self.globalPrefix) != 0 and self.globalPrefix != args[0]:
 694                 print "previous import used depot path %s and now %s was specified. this doesn't work!" % (self.globalPrefix, args[0])
 695                 sys.exit(1)
 696             self.globalPrefix = args[0]
 697
 698         self.changeRange = ""
 699         self.revision = ""
 700         self.users = {}
 701         self.initialParent = ""
 702         self.lastChange = 0
 703         self.initialTag = ""
 704
 705         if self.globalPrefix.find("@") != -1:
 706             atIdx = self.globalPrefix.index("@")
 707             self.changeRange = self.globalPrefix[atIdx:]
 708             if self.changeRange == "@all":
 709                 self.changeRange = ""
 710             elif self.changeRange.find(",") == -1:
 711                 self.revision = self.changeRange
 712                 self.changeRange = ""
 713             self.globalPrefix = self.globalPrefix[0:atIdx]
 714         elif self.globalPrefix.find("#") != -1:
 715             hashIdx = self.globalPrefix.index("#")
 716             self.revision = self.globalPrefix[hashIdx:]
 717             self.globalPrefix = self.globalPrefix[0:hashIdx]
 718         elif len(self.previousDepotPath) == 0:
 719             self.revision = "#head"
 720
 721         if self.globalPrefix.endswith("..."):
 722             self.globalPrefix = self.globalPrefix[:-3]
 723
 724         if not self.globalPrefix.endswith("/"):
 725             self.globalPrefix += "/"
 726
 727         self.getUserMap()
 728
 729         if len(self.changeRange) == 0:
 730             try:
 731                 sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % self.branch)
 732                 output = sout.read()
 733                 if output.endswith("\n"):
 734                     output = output[:-1]
 735                 tagIdx = output.index(" tags/p4/")
 736                 caretIdx = output.find("^")
 737                 endPos = len(output)
 738                 if caretIdx != -1:
 739                     endPos = caretIdx
 740                 self.rev = int(output[tagIdx + 9 : endPos]) + 1
 741                 self.changeRange = "@%s,#head" % self.rev
 742                 self.initialParent = os.popen("git-rev-parse %s" % self.branch).read()[:-1]
 743                 self.initialTag = "p4/%s" % (int(self.rev) - 1)
 744             except:
 745                 pass
 746
 747         self.tz = - time.timezone / 36
 748         tzsign = ("%s" % self.tz)[0]
 749         if tzsign != '+' and tzsign != '-':
 750             self.tz = "+" + ("%s" % self.tz)
 751
 752         self.gitOutput, self.gitStream, self.gitError = popen2.popen3("git-fast-import")
 753
 754         if len(self.revision) > 0:
 755             print "Doing initial import of %s from revision %s" % (self.globalPrefix, self.revision)
 756
 757             details = { "user" : "git perforce import user", "time" : int(time.time()) }
 758             details["desc"] = "Initial import of %s from the state at revision %s" % (self.globalPrefix, self.revision)
 759             details["change"] = self.revision
 760             newestRevision = 0
 761
 762             fileCnt = 0
 763             for info in p4CmdList("files %s...%s" % (self.globalPrefix, self.revision)):
 764                 change = int(info["change"])
 765                 if change > newestRevision:
 766                     newestRevision = change
 767
 768                 if info["action"] == "delete":
 769                     fileCnt = fileCnt + 1
 770                     continue
 771
 772                 for prop in [ "depotFile", "rev", "action", "type" ]:
 773                     details["%s%s" % (prop, fileCnt)] = info[prop]
 774
 775                 fileCnt = fileCnt + 1
 776
 777             details["change"] = newestRevision
 778
 779             try:
 780                 self.commit(details, self.extractFilesFromCommit(details), self.branch, self.globalPrefix)
 781             except IOError:
 782                 print self.gitError.read()
 783
 784         else:
 785             changes = []
 786
 787             if len(self.changesFile) > 0:
 788                 output = open(self.changesFile).readlines()
 789                 changeSet = Set()
 790                 for line in output:
 791                     changeSet.add(int(line))
 792
 793                 for change in changeSet:
 794                     changes.append(change)
 795
 796                 changes.sort()
 797             else:
 798                 output = os.popen("p4 changes %s...%s" % (self.globalPrefix, self.changeRange)).readlines()
 799
 800                 for line in output:
 801                     changeNum = line.split(" ")[1]
 802                     changes.append(changeNum)
 803
 804                 changes.reverse()
 805
 806             if len(changes) == 0:
 807                 if not self.silent:
 808                     print "no changes to import!"
 809                 sys.exit(1)
 810
 811             cnt = 1
 812             for change in changes:
 813                 description = p4Cmd("describe %s" % change)
 814
 815                 if not self.silent:
 816                     sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 817                     sys.stdout.flush()
 818                 cnt = cnt + 1
 819
 820                 try:
 821                     files = self.extractFilesFromCommit(description)
 822                     if self.detectBranches:
 823                         for branch in self.branchesForCommit(files):
 824                             self.knownBranches.add(branch)
 825                             branchPrefix = self.globalPrefix + branch + "/"
 826
 827                             filesForCommit = self.extractFilesInCommitToBranch(files, branchPrefix)
 828
 829                             merged = ""
 830                             parent = ""
 831                             ########### remove cnt!!!
 832                             if branch not in self.createdBranches and cnt > 2:
 833                                 self.createdBranches.add(branch)
 834                                 parent = self.findBranchParent(branchPrefix, files)
 835                                 if parent == branch:
 836                                     parent = ""
 837             #                    elif len(parent) > 0:
 838             #                        print "%s branched off of %s" % (branch, parent)
 839
 840                             if len(parent) == 0:
 841                                 merged = self.findBranchSourceHeuristic(filesForCommit, branch, branchPrefix)
 842                                 if len(merged) > 0:
 843                                     print "change %s could be a merge from %s into %s" % (description["change"], merged, branch)
 844                                     if not self.changeIsBranchMerge(merged, branch, int(description["change"])):
 845                                         merged = ""
 846
 847                             branch = "refs/heads/" + branch
 848                             if len(parent) > 0:
 849                                 parent = "refs/heads/" + parent
 850                             if len(merged) > 0:
 851                                 merged = "refs/heads/" + merged
 852                             self.commit(description, files, branch, branchPrefix, parent, merged)
 853                     else:
 854                         self.commit(description, files, self.branch, self.globalPrefix, self.initialParent)
 855                         self.initialParent = ""
 856                 except IOError:
 857                     print self.gitError.read()
 858                     sys.exit(1)
 859
 860         if not self.silent:
 861             print ""
 862
 863         self.gitStream.write("reset refs/tags/p4/%s\n" % self.lastChange)
 864         self.gitStream.write("from %s\n\n" % self.branch);
 865
 866
 867         self.gitStream.close()
 868         self.gitOutput.close()
 869         self.gitError.close()
 870
 871         os.popen("git-repo-config p4.depotpath %s" % self.globalPrefix).read()
 872         if len(self.initialTag) > 0:
 873             os.popen("git tag -d %s" % self.initialTag).read()
 874
 875         return True
 876
 877 class HelpFormatter(optparse.IndentedHelpFormatter):
 878     def __init__(self):
 879         optparse.IndentedHelpFormatter.__init__(self)
 880
 881     def format_description(self, description):
 882         if description:
 883             return description + "\n"
 884         else:
 885             return ""
 886
 887 def printUsage(commands):
 888     print "usage: %s <command> [options]" % sys.argv[0]
 889     print ""
 890     print "valid commands: %s" % ", ".join(commands)
 891     print ""
 892     print "Try %s <command> --help for command specific help." % sys.argv[0]
 893     print ""
 894
 895 commands = {
 896     "debug" : P4Debug(),
 897     "clean-tags" : P4CleanTags(),
 898     "submit" : P4Sync(),
 899     "sync" : GitSync()
 900 }
 901
 902 if len(sys.argv[1:]) == 0:
 903     printUsage(commands.keys())
 904     sys.exit(2)
 905
 906 cmd = ""
 907 cmdName = sys.argv[1]
 908 try:
 909     cmd = commands[cmdName]
 910 except KeyError:
 911     print "unknown command %s" % cmdName
 912     print ""
 913     printUsage(commands.keys())
 914     sys.exit(2)
 915
 916 options = cmd.options
 917 cmd.gitdir = gitdir
 918 options.append(optparse.make_option("--git-dir", dest="gitdir"))
 919
 920 parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
 921                                options,
 922                                description = cmd.description,
 923                                formatter = HelpFormatter())
 924
 925 (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
 926
 927 gitdir = cmd.gitdir
 928 if len(gitdir) == 0:
 929     gitdir = ".git"
 930     if not isValidGitDir(gitdir):
 931         cdup = os.popen("git-rev-parse --show-cdup").read()[:-1]
 932         if isValidGitDir(cdup + "/" + gitdir):
 933             os.chdir(cdup)
 934
 935 if not isValidGitDir(gitdir):
 936     if isValidGitDir(gitdir + "/.git"):
 937         gitdir += "/.git"
 938     else:
 939         die("fatal: cannot locate git repository at %s" % gitdir)
 940
 941 os.environ["GIT_DIR"] = gitdir
 942
 943 if not cmd.run(args):
 944     parser.print_help()
 945