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, popen2, subprocess, shelve
  12 import tempfile, getopt, sha, os.path, time, platform
  13 import re
  14
  15 from sets import Set;
  16
  17 verbose = False
  18
  19 def die(msg):
  20     if verbose:
  21         raise Exception(msg)
  22     else:
  23         sys.stderr.write(msg + "\n")
  24         sys.exit(1)
  25
  26 def write_pipe(c, str):
  27     if verbose:
  28         sys.stderr.write('Writing pipe: %s\n' % c)
  29
  30     pipe = os.popen(c, 'w')
  31     val = pipe.write(str)
  32     if pipe.close():
  33         die('Command failed: %s' % c)
  34
  35     return val
  36
  37 def read_pipe(c, ignore_error=False):
  38     if verbose:
  39         sys.stderr.write('Reading pipe: %s\n' % c)
  40
  41     pipe = os.popen(c, 'rb')
  42     val = pipe.read()
  43     if pipe.close() and not ignore_error:
  44         die('Command failed: %s' % c)
  45
  46     return val
  47
  48
  49 def read_pipe_lines(c):
  50     if verbose:
  51         sys.stderr.write('Reading pipe: %s\n' % c)
  52     ## todo: check return status
  53     pipe = os.popen(c, 'rb')
  54     val = pipe.readlines()
  55     if pipe.close():
  56         die('Command failed: %s' % c)
  57
  58     return val
  59
  60 def system(cmd):
  61     if verbose:
  62         sys.stderr.write("executing %s\n" % cmd)
  63     if os.system(cmd) != 0:
  64         die("command failed: %s" % cmd)
  65
  66 def p4CmdList(cmd):
  67     cmd = "p4 -G %s" % cmd
  68     if verbose:
  69         sys.stderr.write("Opening pipe: %s\n" % cmd)
  70     pipe = os.popen(cmd, "rb")
  71
  72     result = []
  73     try:
  74         while True:
  75             entry = marshal.load(pipe)
  76             result.append(entry)
  77     except EOFError:
  78         pass
  79     exitCode = pipe.close()
  80     if exitCode != None:
  81         entry = {}
  82         entry["p4ExitCode"] = exitCode
  83         result.append(entry)
  84
  85     return result
  86
  87 def p4Cmd(cmd):
  88     list = p4CmdList(cmd)
  89     result = {}
  90     for entry in list:
  91         result.update(entry)
  92     return result;
  93
  94 def p4Where(depotPath):
  95     if not depotPath.endswith("/"):
  96         depotPath += "/"
  97     output = p4Cmd("where %s..." % depotPath)
  98     if output["code"] == "error":
  99         return ""
 100     clientPath = ""
 101     if "path" in output:
 102         clientPath = output.get("path")
 103     elif "data" in output:
 104         data = output.get("data")
 105         lastSpace = data.rfind(" ")
 106         clientPath = data[lastSpace + 1:]
 107
 108     if clientPath.endswith("..."):
 109         clientPath = clientPath[:-3]
 110     return clientPath
 111
 112 def currentGitBranch():
 113     return read_pipe("git name-rev HEAD").split(" ")[1].strip()
 114
 115 def isValidGitDir(path):
 116     if (os.path.exists(path + "/HEAD")
 117         and os.path.exists(path + "/refs") and os.path.exists(path + "/objects")):
 118         return True;
 119     return False
 120
 121 def parseRevision(ref):
 122     return read_pipe("git rev-parse %s" % ref).strip()
 123
 124 def extractLogMessageFromGitCommit(commit):
 125     logMessage = ""
 126
 127     ## fixme: title is first line of commit, not 1st paragraph.
 128     foundTitle = False
 129     for log in read_pipe_lines("git cat-file commit %s" % commit):
 130        if not foundTitle:
 131            if len(log) == 1:
 132                foundTitle = True
 133            continue
 134
 135        logMessage += log
 136     return logMessage
 137
 138 def extractSettingsGitLog(log):
 139     values = {}
 140     for line in log.split("\n"):
 141         line = line.strip()
 142         m = re.search (r"^ *\[git-p4: (.*)\]$", line)
 143         if not m:
 144             continue
 145
 146         assignments = m.group(1).split (':')
 147         for a in assignments:
 148             vals = a.split ('=')
 149             key = vals[0].strip()
 150             val = ('='.join (vals[1:])).strip()
 151             if val.endswith ('\"') and val.startswith('"'):
 152                 val = val[1:-1]
 153
 154             values[key] = val
 155
 156     paths = values.get("depot-paths")
 157     if not paths:
 158         paths = values.get("depot-path")
 159     values['depot-paths'] = paths.split(',')
 160     return values
 161
 162 def gitBranchExists(branch):
 163     proc = subprocess.Popen(["git", "rev-parse", branch],
 164                             stderr=subprocess.PIPE, stdout=subprocess.PIPE);
 165     return proc.wait() == 0;
 166
 167 def gitConfig(key):
 168     return read_pipe("git config %s" % key, ignore_error=True).strip()
 169
 170 class Command:
 171     def __init__(self):
 172         self.usage = "usage: %prog [options]"
 173         self.needsGit = True
 174
 175 class P4Debug(Command):
 176     def __init__(self):
 177         Command.__init__(self)
 178         self.options = [
 179             optparse.make_option("--verbose", dest="verbose", action="store_true",
 180                                  default=False),
 181             ]
 182         self.description = "A tool to debug the output of p4 -G."
 183         self.needsGit = False
 184         self.verbose = False
 185
 186     def run(self, args):
 187         j = 0
 188         for output in p4CmdList(" ".join(args)):
 189             print 'Element: %d' % j
 190             j += 1
 191             print output
 192         return True
 193
 194 class P4RollBack(Command):
 195     def __init__(self):
 196         Command.__init__(self)
 197         self.options = [
 198             optparse.make_option("--verbose", dest="verbose", action="store_true"),
 199             optparse.make_option("--local", dest="rollbackLocalBranches", action="store_true")
 200         ]
 201         self.description = "A tool to debug the multi-branch import. Don't use :)"
 202         self.verbose = False
 203         self.rollbackLocalBranches = False
 204
 205     def run(self, args):
 206         if len(args) != 1:
 207             return False
 208         maxChange = int(args[0])
 209
 210         if "p4ExitCode" in p4Cmd("changes -m 1"):
 211             die("Problems executing p4");
 212
 213         if self.rollbackLocalBranches:
 214             refPrefix = "refs/heads/"
 215             lines = read_pipe_lines("git rev-parse --symbolic --branches")
 216         else:
 217             refPrefix = "refs/remotes/"
 218             lines = read_pipe_lines("git rev-parse --symbolic --remotes")
 219
 220         for line in lines:
 221             if self.rollbackLocalBranches or (line.startswith("p4/") and line != "p4/HEAD\n"):
 222                 line = line.strip()
 223                 ref = refPrefix + line
 224                 log = extractLogMessageFromGitCommit(ref)
 225                 settings = extractSettingsGitLog(log)
 226
 227                 depotPaths = settings['depot-paths']
 228                 change = settings['change']
 229
 230                 changed = False
 231
 232                 if len(p4Cmd("changes -m 1 "  + ' '.join (['%s...@%s' % (p, maxChange)
 233                                                            for p in depotPaths]))) == 0:
 234                     print "Branch %s did not exist at change %s, deleting." % (ref, maxChange)
 235                     system("git update-ref -d %s `git rev-parse %s`" % (ref, ref))
 236                     continue
 237
 238                 while change and int(change) > maxChange:
 239                     changed = True
 240                     if self.verbose:
 241                         print "%s is at %s ; rewinding towards %s" % (ref, change, maxChange)
 242                     system("git update-ref %s \"%s^\"" % (ref, ref))
 243                     log = extractLogMessageFromGitCommit(ref)
 244                     settings =  extractSettingsGitLog(log)
 245
 246
 247                     depotPaths = settings['depot-paths']
 248                     change = settings['change']
 249
 250                 if changed:
 251                     print "%s rewound to %s" % (ref, change)
 252
 253         return True
 254
 255 class P4Submit(Command):
 256     def __init__(self):
 257         Command.__init__(self)
 258         self.options = [
 259                 optparse.make_option("--continue", action="store_false", dest="firstTime"),
 260                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 261                 optparse.make_option("--origin", dest="origin"),
 262                 optparse.make_option("--reset", action="store_true", dest="reset"),
 263                 optparse.make_option("--log-substitutions", dest="substFile"),
 264                 optparse.make_option("--dry-run", action="store_true"),
 265                 optparse.make_option("--direct", dest="directSubmit", action="store_true"),
 266                 optparse.make_option("--trust-me-like-a-fool", dest="trustMeLikeAFool", action="store_true"),
 267         ]
 268         self.description = "Submit changes from git to the perforce depot."
 269         self.usage += " [name of git branch to submit into perforce depot]"
 270         self.firstTime = True
 271         self.reset = False
 272         self.interactive = True
 273         self.dryRun = False
 274         self.substFile = ""
 275         self.firstTime = True
 276         self.origin = ""
 277         self.directSubmit = False
 278         self.trustMeLikeAFool = False
 279
 280         self.logSubstitutions = {}
 281         self.logSubstitutions["<enter description here>"] = "%log%"
 282         self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
 283
 284     def check(self):
 285         if len(p4CmdList("opened ...")) > 0:
 286             die("You have files opened with perforce! Close them before starting the sync.")
 287
 288     def start(self):
 289         if len(self.config) > 0 and not self.reset:
 290             die("Cannot start sync. Previous sync config found at %s\n"
 291                 "If you want to start submitting again from scratch "
 292                 "maybe you want to call git-p4 submit --reset" % self.configFile)
 293
 294         commits = []
 295         if self.directSubmit:
 296             commits.append("0")
 297         else:
 298             for line in read_pipe_lines("git rev-list --no-merges %s..%s" % (self.origin, self.master)):
 299                 commits.append(line.strip())
 300             commits.reverse()
 301
 302         self.config["commits"] = commits
 303
 304     def prepareLogMessage(self, template, message):
 305         result = ""
 306
 307         for line in template.split("\n"):
 308             if line.startswith("#"):
 309                 result += line + "\n"
 310                 continue
 311
 312             substituted = False
 313             for key in self.logSubstitutions.keys():
 314                 if line.find(key) != -1:
 315                     value = self.logSubstitutions[key]
 316                     value = value.replace("%log%", message)
 317                     if value != "@remove@":
 318                         result += line.replace(key, value) + "\n"
 319                     substituted = True
 320                     break
 321
 322             if not substituted:
 323                 result += line + "\n"
 324
 325         return result
 326
 327     def applyCommit(self, id):
 328         if self.directSubmit:
 329             print "Applying local change in working directory/index"
 330             diff = self.diffStatus
 331         else:
 332             print "Applying %s" % (read_pipe("git log --max-count=1 --pretty=oneline %s" % id))
 333             diff = read_pipe_lines("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id))
 334         filesToAdd = set()
 335         filesToDelete = set()
 336         editedFiles = set()
 337         for line in diff:
 338             modifier = line[0]
 339             path = line[1:].strip()
 340             if modifier == "M":
 341                 system("p4 edit \"%s\"" % path)
 342                 editedFiles.add(path)
 343             elif modifier == "A":
 344                 filesToAdd.add(path)
 345                 if path in filesToDelete:
 346                     filesToDelete.remove(path)
 347             elif modifier == "D":
 348                 filesToDelete.add(path)
 349                 if path in filesToAdd:
 350                     filesToAdd.remove(path)
 351             else:
 352                 die("unknown modifier %s for %s" % (modifier, path))
 353
 354         if self.directSubmit:
 355             diffcmd = "cat \"%s\"" % self.diffFile
 356         else:
 357             diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
 358         patchcmd = diffcmd + " | git apply "
 359         tryPatchCmd = patchcmd + "--check -"
 360         applyPatchCmd = patchcmd + "--check --apply -"
 361
 362         if os.system(tryPatchCmd) != 0:
 363             print "Unfortunately applying the change failed!"
 364             print "What do you want to do?"
 365             response = "x"
 366             while response != "s" and response != "a" and response != "w":
 367                 response = raw_input("[s]kip this patch / [a]pply the patch forcibly "
 368                                      "and with .rej files / [w]rite the patch to a file (patch.txt) ")
 369             if response == "s":
 370                 print "Skipping! Good luck with the next patches..."
 371                 return
 372             elif response == "a":
 373                 os.system(applyPatchCmd)
 374                 if len(filesToAdd) > 0:
 375                     print "You may also want to call p4 add on the following files:"
 376                     print " ".join(filesToAdd)
 377                 if len(filesToDelete):
 378                     print "The following files should be scheduled for deletion with p4 delete:"
 379                     print " ".join(filesToDelete)
 380                 die("Please resolve and submit the conflict manually and "
 381                     + "continue afterwards with git-p4 submit --continue")
 382             elif response == "w":
 383                 system(diffcmd + " > patch.txt")
 384                 print "Patch saved to patch.txt in %s !" % self.clientPath
 385                 die("Please resolve and submit the conflict manually and "
 386                     "continue afterwards with git-p4 submit --continue")
 387
 388         system(applyPatchCmd)
 389
 390         for f in filesToAdd:
 391             system("p4 add %s" % f)
 392         for f in filesToDelete:
 393             system("p4 revert %s" % f)
 394             system("p4 delete %s" % f)
 395
 396         logMessage = ""
 397         if not self.directSubmit:
 398             logMessage = extractLogMessageFromGitCommit(id)
 399             logMessage = logMessage.replace("\n", "\n\t")
 400             logMessage = logMessage.strip()
 401
 402         template = read_pipe("p4 change -o")
 403
 404         if self.interactive:
 405             submitTemplate = self.prepareLogMessage(template, logMessage)
 406             diff = read_pipe("p4 diff -du ...")
 407
 408             for newFile in filesToAdd:
 409                 diff += "==== new file ====\n"
 410                 diff += "--- /dev/null\n"
 411                 diff += "+++ %s\n" % newFile
 412                 f = open(newFile, "r")
 413                 for line in f.readlines():
 414                     diff += "+" + line
 415                 f.close()
 416
 417             separatorLine = "######## everything below this line is just the diff #######"
 418             if platform.system() == "Windows":
 419                 separatorLine += "\r"
 420             separatorLine += "\n"
 421
 422             response = "e"
 423             if self.trustMeLikeAFool:
 424                 response = "y"
 425
 426             firstIteration = True
 427             while response == "e":
 428                 if not firstIteration:
 429                     response = raw_input("Do you want to submit this change? [y]es/[e]dit/[n]o/[s]kip ")
 430                 firstIteration = False
 431                 if response == "e":
 432                     [handle, fileName] = tempfile.mkstemp()
 433                     tmpFile = os.fdopen(handle, "w+")
 434                     tmpFile.write(submitTemplate + separatorLine + diff)
 435                     tmpFile.close()
 436                     defaultEditor = "vi"
 437                     if platform.system() == "Windows":
 438                         defaultEditor = "notepad"
 439                     editor = os.environ.get("EDITOR", defaultEditor);
 440                     system(editor + " " + fileName)
 441                     tmpFile = open(fileName, "rb")
 442                     message = tmpFile.read()
 443                     tmpFile.close()
 444                     os.remove(fileName)
 445                     submitTemplate = message[:message.index(separatorLine)]
 446
 447             if response == "y" or response == "yes":
 448                if self.dryRun:
 449                    print submitTemplate
 450                    raw_input("Press return to continue...")
 451                else:
 452                    if self.directSubmit:
 453                        print "Submitting to git first"
 454                        os.chdir(self.oldWorkingDirectory)
 455                        write_pipe("git commit -a -F -", submitTemplate)
 456                        os.chdir(self.clientPath)
 457
 458                    write_pipe("p4 submit -i", submitTemplate)
 459             elif response == "s":
 460                 for f in editedFiles:
 461                     system("p4 revert \"%s\"" % f);
 462                 for f in filesToAdd:
 463                     system("p4 revert \"%s\"" % f);
 464                     system("rm %s" %f)
 465                 for f in filesToDelete:
 466                     system("p4 delete \"%s\"" % f);
 467                 return
 468             else:
 469                 print "Not submitting!"
 470                 self.interactive = False
 471         else:
 472             fileName = "submit.txt"
 473             file = open(fileName, "w+")
 474             file.write(self.prepareLogMessage(template, logMessage))
 475             file.close()
 476             print ("Perforce submit template written as %s. "
 477                    + "Please review/edit and then use p4 submit -i < %s to submit directly!"
 478                    % (fileName, fileName))
 479
 480     def run(self, args):
 481         # make gitdir absolute so we can cd out into the perforce checkout
 482         os.environ["GIT_DIR"] = gitdir
 483
 484         if len(args) == 0:
 485             self.master = currentGitBranch()
 486             if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
 487                 die("Detecting current git branch failed!")
 488         elif len(args) == 1:
 489             self.master = args[0]
 490         else:
 491             return False
 492
 493         depotPath = ""
 494         settings = None
 495         if gitBranchExists("p4"):
 496             settings = extractSettingsGitLog(extractLogMessageFromGitCommit("p4"))
 497         if len(depotPath) == 0 and gitBranchExists("origin"):
 498             settings = extractSettingsGitLog(extractLogMessageFromGitCommit("origin"))
 499         depotPaths = settings['depot-paths']
 500
 501         if len(depotPath) == 0:
 502             print "Internal error: cannot locate perforce depot path from existing branches"
 503             sys.exit(128)
 504
 505         self.clientPath = p4Where(depotPath)
 506
 507         if len(self.clientPath) == 0:
 508             print "Error: Cannot locate perforce checkout of %s in client view" % depotPath
 509             sys.exit(128)
 510
 511         print "Perforce checkout for depot path %s located at %s" % (depotPath, self.clientPath)
 512         self.oldWorkingDirectory = os.getcwd()
 513
 514         if self.directSubmit:
 515             self.diffStatus = read_pipe_lines("git diff -r --name-status HEAD")
 516             if len(self.diffStatus) == 0:
 517                 print "No changes in working directory to submit."
 518                 return True
 519             patch = read_pipe("git diff -p --binary --diff-filter=ACMRTUXB HEAD")
 520             self.diffFile = self.gitdir + "/p4-git-diff"
 521             f = open(self.diffFile, "wb")
 522             f.write(patch)
 523             f.close();
 524
 525         os.chdir(self.clientPath)
 526         response = raw_input("Do you want to sync %s with p4 sync? [y]es/[n]o " % self.clientPath)
 527         if response == "y" or response == "yes":
 528             system("p4 sync ...")
 529
 530         if len(self.origin) == 0:
 531             if gitBranchExists("p4"):
 532                 self.origin = "p4"
 533             else:
 534                 self.origin = "origin"
 535
 536         if self.reset:
 537             self.firstTime = True
 538
 539         if len(self.substFile) > 0:
 540             for line in open(self.substFile, "r").readlines():
 541                 tokens = line.strip().split("=")
 542                 self.logSubstitutions[tokens[0]] = tokens[1]
 543
 544         self.check()
 545         self.configFile = self.gitdir + "/p4-git-sync.cfg"
 546         self.config = shelve.open(self.configFile, writeback=True)
 547
 548         if self.firstTime:
 549             self.start()
 550
 551         commits = self.config.get("commits", [])
 552
 553         while len(commits) > 0:
 554             self.firstTime = False
 555             commit = commits[0]
 556             commits = commits[1:]
 557             self.config["commits"] = commits
 558             self.applyCommit(commit)
 559             if not self.interactive:
 560                 break
 561
 562         self.config.close()
 563
 564         if self.directSubmit:
 565             os.remove(self.diffFile)
 566
 567         if len(commits) == 0:
 568             if self.firstTime:
 569                 print "No changes found to apply between %s and current HEAD" % self.origin
 570             else:
 571                 print "All changes applied!"
 572                 os.chdir(self.oldWorkingDirectory)
 573                 response = raw_input("Do you want to sync from Perforce now using git-p4 rebase? [y]es/[n]o ")
 574                 if response == "y" or response == "yes":
 575                     rebase = P4Rebase()
 576                     rebase.run([])
 577             os.remove(self.configFile)
 578
 579         return True
 580
 581 class P4Sync(Command):
 582     def __init__(self):
 583         Command.__init__(self)
 584         self.options = [
 585                 optparse.make_option("--branch", dest="branch"),
 586                 optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
 587                 optparse.make_option("--changesfile", dest="changesFile"),
 588                 optparse.make_option("--silent", dest="silent", action="store_true"),
 589                 optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
 590                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 591                 optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false",
 592                                      help="Import into refs/heads/ , not refs/remotes"),
 593                 optparse.make_option("--max-changes", dest="maxChanges"),
 594                 optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true',
 595                                      help="Keep entire BRANCH/DIR/SUBDIR prefix during import")
 596         ]
 597         self.description = """Imports from Perforce into a git repository.\n
 598     example:
 599     //depot/my/project/ -- to import the current head
 600     //depot/my/project/@all -- to import everything
 601     //depot/my/project/@1,6 -- to import only from revision 1 to 6
 602
 603     (a ... is not needed in the path p4 specification, it's added implicitly)"""
 604
 605         self.usage += " //depot/path[@revRange]"
 606         self.silent = False
 607         self.createdBranches = Set()
 608         self.committedChanges = Set()
 609         self.branch = ""
 610         self.detectBranches = False
 611         self.detectLabels = False
 612         self.changesFile = ""
 613         self.syncWithOrigin = True
 614         self.verbose = False
 615         self.importIntoRemotes = True
 616         self.maxChanges = ""
 617         self.isWindows = (platform.system() == "Windows")
 618         self.keepRepoPath = False
 619         self.depotPaths = None
 620
 621         if gitConfig("git-p4.syncFromOrigin") == "false":
 622             self.syncWithOrigin = False
 623
 624     def extractFilesFromCommit(self, commit):
 625         files = []
 626         fnum = 0
 627         while commit.has_key("depotFile%s" % fnum):
 628             path =  commit["depotFile%s" % fnum]
 629
 630             found = [p for p in self.depotPaths
 631                      if path.startswith (p)]
 632             if not found:
 633                 fnum = fnum + 1
 634                 continue
 635
 636             file = {}
 637             file["path"] = path
 638             file["rev"] = commit["rev%s" % fnum]
 639             file["action"] = commit["action%s" % fnum]
 640             file["type"] = commit["type%s" % fnum]
 641             files.append(file)
 642             fnum = fnum + 1
 643         return files
 644
 645     def stripRepoPath(self, path, prefixes):
 646         if self.keepRepoPath:
 647             prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
 648
 649         for p in prefixes:
 650             if path.startswith(p):
 651                 path = path[len(p):]
 652
 653         return path
 654
 655     def splitFilesIntoBranches(self, commit):
 656         branches = {}
 657         fnum = 0
 658         while commit.has_key("depotFile%s" % fnum):
 659             path =  commit["depotFile%s" % fnum]
 660             found = [p for p in self.depotPaths
 661                      if path.startswith (p)]
 662             if not found:
 663                 fnum = fnum + 1
 664                 continue
 665
 666             file = {}
 667             file["path"] = path
 668             file["rev"] = commit["rev%s" % fnum]
 669             file["action"] = commit["action%s" % fnum]
 670             file["type"] = commit["type%s" % fnum]
 671             fnum = fnum + 1
 672
 673             relPath = self.stripRepoPath(path, self.depotPaths)
 674
 675             for branch in self.knownBranches.keys():
 676
 677                 # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
 678                 if relPath.startswith(branch + "/"):
 679                     if branch not in branches:
 680                         branches[branch] = []
 681                     branches[branch].append(file)
 682
 683         return branches
 684
 685     ## Should move this out, doesn't use SELF.
 686     def readP4Files(self, files):
 687         files = [f for f in files
 688                  if f['action'] != 'delete']
 689
 690         if not files:
 691             return
 692
 693         filedata = p4CmdList('print %s' % ' '.join(['"%s#%s"' % (f['path'],
 694                                                                  f['rev'])
 695                                                     for f in files]))
 696
 697         j = 0;
 698         contents = {}
 699         while j < len(filedata):
 700             stat = filedata[j]
 701             j += 1
 702             text = ''
 703             while j < len(filedata) and filedata[j]['code'] in ('text',
 704                                                                 'binary'):
 705                 text += filedata[j]['data']
 706                 j += 1
 707
 708             contents[stat['depotFile']] = text
 709
 710         for f in files:
 711             assert not f.has_key('data')
 712             f['data'] = contents[f['path']]
 713
 714     def commit(self, details, files, branch, branchPrefixes, parent = ""):
 715         epoch = details["time"]
 716         author = details["user"]
 717
 718         if self.verbose:
 719             print "commit into %s" % branch
 720
 721         # start with reading files; if that fails, we should not
 722         # create a commit.
 723         new_files = []
 724         for f in files:
 725             if [p for p in branchPrefixes if f['path'].startswith(p)]:
 726                 new_files.append (f)
 727             else:
 728                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % path)
 729         files = new_files
 730         self.readP4Files(files)
 731
 732
 733
 734
 735         self.gitStream.write("commit %s\n" % branch)
 736 #        gitStream.write("mark :%s\n" % details["change"])
 737         self.committedChanges.add(int(details["change"]))
 738         committer = ""
 739         if author not in self.users:
 740             self.getUserMapFromPerforceServer()
 741         if author in self.users:
 742             committer = "%s %s %s" % (self.users[author], epoch, self.tz)
 743         else:
 744             committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
 745
 746         self.gitStream.write("committer %s\n" % committer)
 747
 748         self.gitStream.write("data <<EOT\n")
 749         self.gitStream.write(details["desc"])
 750         self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s: "
 751                              "options = %s]\n"
 752                              % (','.join (branchPrefixes), details["change"],
 753                                 details['options']
 754                                 ))
 755         self.gitStream.write("EOT\n\n")
 756
 757         if len(parent) > 0:
 758             if self.verbose:
 759                 print "parent %s" % parent
 760             self.gitStream.write("from %s\n" % parent)
 761
 762         for file in files:
 763             if file["type"] == "apple":
 764                 print "\nfile %s is a strange apple file that forks. Ignoring!" % file['path']
 765                 continue
 766
 767             relPath = self.stripRepoPath(file['path'], branchPrefixes)
 768             if file["action"] == "delete":
 769                 self.gitStream.write("D %s\n" % relPath)
 770             else:
 771                 mode = 644
 772                 if file["type"].startswith("x"):
 773                     mode = 755
 774
 775                 data = file['data']
 776
 777                 if self.isWindows and file["type"].endswith("text"):
 778                     data = data.replace("\r\n", "\n")
 779
 780                 self.gitStream.write("M %d inline %s\n" % (mode, relPath))
 781                 self.gitStream.write("data %s\n" % len(data))
 782                 self.gitStream.write(data)
 783                 self.gitStream.write("\n")
 784
 785         self.gitStream.write("\n")
 786
 787         change = int(details["change"])
 788
 789         if self.labels.has_key(change):
 790             label = self.labels[change]
 791             labelDetails = label[0]
 792             labelRevisions = label[1]
 793             if self.verbose:
 794                 print "Change %s is labelled %s" % (change, labelDetails)
 795
 796             files = p4CmdList("files " + ' '.join (["%s...@%s" % (p, change)
 797                                                     for p in branchPrefixes]))
 798
 799             if len(files) == len(labelRevisions):
 800
 801                 cleanedFiles = {}
 802                 for info in files:
 803                     if info["action"] == "delete":
 804                         continue
 805                     cleanedFiles[info["depotFile"]] = info["rev"]
 806
 807                 if cleanedFiles == labelRevisions:
 808                     self.gitStream.write("tag tag_%s\n" % labelDetails["label"])
 809                     self.gitStream.write("from %s\n" % branch)
 810
 811                     owner = labelDetails["Owner"]
 812                     tagger = ""
 813                     if author in self.users:
 814                         tagger = "%s %s %s" % (self.users[owner], epoch, self.tz)
 815                     else:
 816                         tagger = "%s <a@b> %s %s" % (owner, epoch, self.tz)
 817                     self.gitStream.write("tagger %s\n" % tagger)
 818                     self.gitStream.write("data <<EOT\n")
 819                     self.gitStream.write(labelDetails["Description"])
 820                     self.gitStream.write("EOT\n\n")
 821
 822                 else:
 823                     if not self.silent:
 824                         print ("Tag %s does not match with change %s: files do not match."
 825                                % (labelDetails["label"], change))
 826
 827             else:
 828                 if not self.silent:
 829                     print ("Tag %s does not match with change %s: file count is different."
 830                            % (labelDetails["label"], change))
 831
 832     def getUserCacheFilename(self):
 833         return os.environ["HOME"] + "/.gitp4-usercache.txt"
 834
 835     def getUserMapFromPerforceServer(self):
 836         if self.userMapFromPerforceServer:
 837             return
 838         self.users = {}
 839
 840         for output in p4CmdList("users"):
 841             if not output.has_key("User"):
 842                 continue
 843             self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 844
 845
 846         s = ''
 847         for (key, val) in self.users.items():
 848             s += "%s\t%s\n" % (key, val)
 849
 850         open(self.getUserCacheFilename(), "wb").write(s)
 851         self.userMapFromPerforceServer = True
 852
 853     def loadUserMapFromCache(self):
 854         self.users = {}
 855         self.userMapFromPerforceServer = False
 856         try:
 857             cache = open(self.getUserCacheFilename(), "rb")
 858             lines = cache.readlines()
 859             cache.close()
 860             for line in lines:
 861                 entry = line.strip().split("\t")
 862                 self.users[entry[0]] = entry[1]
 863         except IOError:
 864             self.getUserMapFromPerforceServer()
 865
 866     def getLabels(self):
 867         self.labels = {}
 868
 869         l = p4CmdList("labels %s..." % ' '.join (self.depotPaths))
 870         if len(l) > 0 and not self.silent:
 871             print "Finding files belonging to labels in %s" % `self.depotPath`
 872
 873         for output in l:
 874             label = output["label"]
 875             revisions = {}
 876             newestChange = 0
 877             if self.verbose:
 878                 print "Querying files for label %s" % label
 879             for file in p4CmdList("files "
 880                                   +  ' '.join (["%s...@%s" % (p, label)
 881                                                 for p in self.depotPaths])):
 882                 revisions[file["depotFile"]] = file["rev"]
 883                 change = int(file["change"])
 884                 if change > newestChange:
 885                     newestChange = change
 886
 887             self.labels[newestChange] = [output, revisions]
 888
 889         if self.verbose:
 890             print "Label changes: %s" % self.labels.keys()
 891
 892     def guessProjectName(self):
 893         for p in self.depotPaths:
 894             return p [p.strip().rfind("/") + 1:]
 895
 896     def getBranchMapping(self):
 897
 898         ## FIXME - what's a P4 projectName ?
 899         self.projectName = self.guessProjectName()
 900
 901         for info in p4CmdList("branches"):
 902             details = p4Cmd("branch -o %s" % info["branch"])
 903             viewIdx = 0
 904             while details.has_key("View%s" % viewIdx):
 905                 paths = details["View%s" % viewIdx].split(" ")
 906                 viewIdx = viewIdx + 1
 907                 # require standard //depot/foo/... //depot/bar/... mapping
 908                 if len(paths) != 2 or not paths[0].endswith("/...") or not paths[1].endswith("/..."):
 909                     continue
 910                 source = paths[0]
 911                 destination = paths[1]
 912                 ## HACK
 913                 if source.startswith(self.depotPaths[0]) and destination.startswith(self.depotPaths[0]):
 914                     source = source[len(self.depotPaths[0]):-4]
 915                     destination = destination[len(self.depotPaths[0]):-4]
 916                     if destination not in self.knownBranches:
 917                         self.knownBranches[destination] = source
 918                     if source not in self.knownBranches:
 919                         self.knownBranches[source] = source
 920
 921     def listExistingP4GitBranches(self):
 922         self.p4BranchesInGit = []
 923
 924         cmdline = "git rev-parse --symbolic "
 925         if self.importIntoRemotes:
 926             cmdline += " --remotes"
 927         else:
 928             cmdline += " --branches"
 929
 930         for line in read_pipe_lines(cmdline):
 931             line = line.strip()
 932
 933             ## only import to p4/
 934             if not line.startswith('p4/'):
 935                 continue
 936             branch = line
 937             if self.importIntoRemotes:
 938                 # strip off p4
 939                 branch = re.sub ("^p4/", "", line)
 940
 941             self.p4BranchesInGit.append(branch)
 942             self.initialParents[self.refPrefix + branch] = parseRevision(line)
 943
 944     def createOrUpdateBranchesFromOrigin(self):
 945         if not self.silent:
 946             print ("Creating/updating branch(es) in %s based on origin branch(es)"
 947                    % self.refPrefix)
 948
 949         for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
 950             line = line.strip()
 951             if (not line.startswith("origin/")) or line.endswith("HEAD\n"):
 952                 continue
 953
 954             headName = line[len("origin/"):]
 955             remoteHead = self.refPrefix + headName
 956             originHead = "origin/" + headName
 957
 958             original = extractSettingsGitLog(extractLogMessageFromGitCommit(originHead))
 959             if (not original.has_key('depot-paths')
 960                 or not original.has_key('change')):
 961                 continue
 962
 963             update = False
 964             if not gitBranchExists(remoteHead):
 965                 if self.verbose:
 966                     print "creating %s" % remoteHead
 967                 update = True
 968             else:
 969                 settings =  extractSettingsGitLog(extractLogMessageFromGitCommit(remoteHead))
 970                 if settings.has_key('change') > 0:
 971                     if settings['depot-paths'] == original['depot-paths']:
 972                         originP4Change = int(original['change'])
 973                         p4Change = int(settings['change'])
 974                         if originP4Change > p4Change:
 975                             print ("%s (%s) is newer than %s (%s). "
 976                                    "Updating p4 branch from origin."
 977                                    % (originHead, originP4Change,
 978                                       remoteHead, p4Change))
 979                             update = True
 980                     else:
 981                         print ("Ignoring: %s was imported from %s while "
 982                                "%s was imported from %s"
 983                                % (originHead, ','.join(original['depot-paths']),
 984                                   remoteHead, ','.join(settings['depot-paths'])))
 985
 986             if update:
 987                 system("git update-ref %s %s" % (remoteHead, originHead))
 988
 989     def updateOptionDict(self, d):
 990         option_keys = {}
 991         if self.keepRepoPath:
 992             option_keys['keepRepoPath'] = 1
 993
 994         d["options"] = ' '.join(sorted(option_keys.keys()))
 995
 996     def readOptions(self, d):
 997         self.keepRepoPath = (d.has_key('options')
 998                              and ('keepRepoPath' in d['options']))
 999
1000     def run(self, args):
1001         self.depotPaths = []
1002         self.changeRange = ""
1003         self.initialParent = ""
1004         self.previousDepotPaths = []
1005
1006         # map from branch depot path to parent branch
1007         self.knownBranches = {}
1008         self.initialParents = {}
1009         self.hasOrigin = gitBranchExists("origin")
1010
1011         if self.importIntoRemotes:
1012             self.refPrefix = "refs/remotes/p4/"
1013         else:
1014             self.refPrefix = "refs/heads/"
1015
1016         if self.syncWithOrigin and self.hasOrigin:
1017             if not self.silent:
1018                 print "Syncing with origin first by calling git fetch origin"
1019             system("git fetch origin")
1020
1021         if len(self.branch) == 0:
1022             self.branch = self.refPrefix + "p4/master"
1023             if gitBranchExists("refs/heads/p4") and self.importIntoRemotes:
1024                 system("git update-ref %s refs/heads/p4" % self.branch)
1025                 system("git branch -D p4");
1026             # create it /after/ importing, when master exists
1027             if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes:
1028                 system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
1029
1030         # TODO: should always look at previous commits,
1031         # merge with previous imports, if possible.
1032         if args == []:
1033             if self.hasOrigin:
1034                 self.createOrUpdateBranchesFromOrigin()
1035             self.listExistingP4GitBranches()
1036
1037             if len(self.p4BranchesInGit) > 1:
1038                 if not self.silent:
1039                     print "Importing from/into multiple branches"
1040                 self.detectBranches = True
1041
1042             if self.verbose:
1043                 print "branches: %s" % self.p4BranchesInGit
1044
1045             p4Change = 0
1046             for branch in self.p4BranchesInGit:
1047                 logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
1048
1049                 settings = extractSettingsGitLog(logMsg)
1050
1051                 self.readOptions(settings)
1052                 if (settings.has_key('depot-paths')
1053                     and settings.has_key ('change')):
1054                     change = int(settings['change']) + 1
1055                     p4Change = max(p4Change, change)
1056
1057                     depotPaths = sorted(settings['depot-paths'])
1058                     if self.previousDepotPaths == []:
1059                         self.previousDepotPaths = depotPaths
1060                     else:
1061                         paths = []
1062                         for (prev, cur) in zip(self.previousDepotPaths, depotPaths):
1063                             for i in range(0, min(len(cur), len(prev))):
1064                                 if cur[i] <> prev[i]:
1065                                     i = i - 1
1066                                     break
1067
1068                             paths.append (cur[:i + 1])
1069
1070                         self.previousDepotPaths = paths
1071
1072             if p4Change > 0:
1073                 self.depotPaths = sorted(self.previousDepotPaths)
1074                 self.changeRange = "@%s,#head" % p4Change
1075                 if not self.detectBranches:
1076                     self.initialParent = parseRevision(self.branch)
1077                 if not self.silent and not self.detectBranches:
1078                     print "Performing incremental import into %s git branch" % self.branch
1079
1080         if not self.branch.startswith("refs/"):
1081             self.branch = "refs/heads/" + self.branch
1082
1083         if len(args) == 0 and self.depotPaths:
1084             if not self.silent:
1085                 print "Depot paths: %s" % ' '.join(self.depotPaths)
1086         else:
1087             if self.depotPaths and self.depotPaths != args:
1088                 print ("previous import used depot path %s and now %s was specified. "
1089                        "This doesn't work!" % (' '.join (self.depotPaths),
1090                                                ' '.join (args)))
1091                 sys.exit(1)
1092
1093             self.depotPaths = sorted(args)
1094
1095         self.revision = ""
1096         self.users = {}
1097
1098         newPaths = []
1099         for p in self.depotPaths:
1100             if p.find("@") != -1:
1101                 atIdx = p.index("@")
1102                 self.changeRange = p[atIdx:]
1103                 if self.changeRange == "@all":
1104                     self.changeRange = ""
1105                 elif ',' not in self.changeRange:
1106                     self.revision = self.changeRange
1107                     self.changeRange = ""
1108                 p = p[0:atIdx]
1109             elif p.find("#") != -1:
1110                 hashIdx = p.index("#")
1111                 self.revision = p[hashIdx:]
1112                 p = p[0:hashIdx]
1113             elif self.previousDepotPaths == []:
1114                 self.revision = "#head"
1115
1116             p = re.sub ("\.\.\.$", "", p)
1117             if not p.endswith("/"):
1118                 p += "/"
1119
1120             newPaths.append(p)
1121
1122         self.depotPaths = newPaths
1123
1124
1125         self.loadUserMapFromCache()
1126         self.labels = {}
1127         if self.detectLabels:
1128             self.getLabels();
1129
1130         if self.detectBranches:
1131             self.getBranchMapping();
1132             if self.verbose:
1133                 print "p4-git branches: %s" % self.p4BranchesInGit
1134                 print "initial parents: %s" % self.initialParents
1135             for b in self.p4BranchesInGit:
1136                 if b != "master":
1137
1138                     ## FIXME
1139                     b = b[len(self.projectName):]
1140                 self.createdBranches.add(b)
1141
1142         self.tz = "%+03d%02d" % (- time.timezone / 3600, ((- time.timezone % 3600) / 60))
1143
1144         importProcess = subprocess.Popen(["git", "fast-import"],
1145                                          stdin=subprocess.PIPE, stdout=subprocess.PIPE,
1146                                          stderr=subprocess.PIPE);
1147         self.gitOutput = importProcess.stdout
1148         self.gitStream = importProcess.stdin
1149         self.gitError = importProcess.stderr
1150
1151         if self.revision:
1152             print "Doing initial import of %s from revision %s" % (' '.join(self.depotPaths), self.revision)
1153
1154             details = { "user" : "git perforce import user", "time" : int(time.time()) }
1155             details["desc"] = ("Initial import of %s from the state at revision %s"
1156                                % (' '.join(self.depotPaths), self.revision))
1157             details["change"] = self.revision
1158             newestRevision = 0
1159
1160             fileCnt = 0
1161             for info in p4CmdList("files "
1162                                   +  ' '.join(["%s...%s"
1163                                                % (p, self.revision)
1164                                                for p in self.depotPaths])):
1165
1166                 if info['code'] == 'error':
1167                     sys.stderr.write("p4 returned an error: %s\n"
1168                                      % info['data'])
1169                     sys.exit(1)
1170
1171
1172                 change = int(info["change"])
1173                 if change > newestRevision:
1174                     newestRevision = change
1175
1176                 if info["action"] == "delete":
1177                     # don't increase the file cnt, otherwise details["depotFile123"] will have gaps!
1178                     #fileCnt = fileCnt + 1
1179                     continue
1180
1181                 for prop in ["depotFile", "rev", "action", "type" ]:
1182                     details["%s%s" % (prop, fileCnt)] = info[prop]
1183
1184                 fileCnt = fileCnt + 1
1185
1186             details["change"] = newestRevision
1187             self.updateOptionDict(details)
1188             try:
1189                 self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
1190             except IOError:
1191                 print "IO error with git fast-import. Is your git version recent enough?"
1192                 print self.gitError.read()
1193
1194         else:
1195             changes = []
1196
1197             if len(self.changesFile) > 0:
1198                 output = open(self.changesFile).readlines()
1199                 changeSet = Set()
1200                 for line in output:
1201                     changeSet.add(int(line))
1202
1203                 for change in changeSet:
1204                     changes.append(change)
1205
1206                 changes.sort()
1207             else:
1208                 if self.verbose:
1209                     print "Getting p4 changes for %s...%s" % (', '.join(self.depotPaths),
1210                                                               self.changeRange)
1211                 assert self.depotPaths
1212                 output = read_pipe_lines("p4 changes " + ' '.join (["%s...%s" % (p, self.changeRange)
1213                                                                     for p in self.depotPaths]))
1214
1215                 for line in output:
1216                     changeNum = line.split(" ")[1]
1217                     changes.append(changeNum)
1218
1219                 changes.reverse()
1220
1221                 if len(self.maxChanges) > 0:
1222                     changes = changes[0:min(int(self.maxChanges), len(changes))]
1223
1224             if len(changes) == 0:
1225                 if not self.silent:
1226                     print "No changes to import!"
1227                 return True
1228
1229             self.updatedBranches = set()
1230
1231             cnt = 1
1232             for change in changes:
1233                 description = p4Cmd("describe %s" % change)
1234                 self.updateOptionDict(description)
1235
1236                 if not self.silent:
1237                     sys.stdout.write("\rImporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
1238                     sys.stdout.flush()
1239                 cnt = cnt + 1
1240
1241                 try:
1242                     if self.detectBranches:
1243                         branches = self.splitFilesIntoBranches(description)
1244                         for branch in branches.keys():
1245                             ## HACK  --hwn
1246                             branchPrefix = self.depotPaths[0] + branch + "/"
1247
1248                             parent = ""
1249
1250                             filesForCommit = branches[branch]
1251
1252                             if self.verbose:
1253                                 print "branch is %s" % branch
1254
1255                             self.updatedBranches.add(branch)
1256
1257                             if branch not in self.createdBranches:
1258                                 self.createdBranches.add(branch)
1259                                 parent = self.knownBranches[branch]
1260                                 if parent == branch:
1261                                     parent = ""
1262                                 elif self.verbose:
1263                                     print "parent determined through known branches: %s" % parent
1264
1265                             # main branch? use master
1266                             if branch == "main":
1267                                 branch = "master"
1268                             else:
1269
1270                                 ## FIXME
1271                                 branch = self.projectName + branch
1272
1273                             if parent == "main":
1274                                 parent = "master"
1275                             elif len(parent) > 0:
1276                                 ## FIXME
1277                                 parent = self.projectName + parent
1278
1279                             branch = self.refPrefix + branch
1280                             if len(parent) > 0:
1281                                 parent = self.refPrefix + parent
1282
1283                             if self.verbose:
1284                                 print "looking for initial parent for %s; current parent is %s" % (branch, parent)
1285
1286                             if len(parent) == 0 and branch in self.initialParents:
1287                                 parent = self.initialParents[branch]
1288                                 del self.initialParents[branch]
1289
1290                             self.commit(description, filesForCommit, branch, branchPrefix, parent)
1291                     else:
1292                         files = self.extractFilesFromCommit(description)
1293                         self.commit(description, files, self.branch, self.depotPaths,
1294                                     self.initialParent)
1295                         self.initialParent = ""
1296                 except IOError:
1297                     print self.gitError.read()
1298                     sys.exit(1)
1299
1300             if not self.silent:
1301                 print ""
1302                 if len(self.updatedBranches) > 0:
1303                     sys.stdout.write("Updated branches: ")
1304                     for b in self.updatedBranches:
1305                         sys.stdout.write("%s " % b)
1306                     sys.stdout.write("\n")
1307
1308
1309         self.gitStream.close()
1310         if importProcess.wait() != 0:
1311             die("fast-import failed: %s" % self.gitError.read())
1312         self.gitOutput.close()
1313         self.gitError.close()
1314
1315         return True
1316
1317 class P4Rebase(Command):
1318     def __init__(self):
1319         Command.__init__(self)
1320         self.options = [ ]
1321         self.description = ("Fetches the latest revision from perforce and "
1322                             + "rebases the current work (branch) against it")
1323         self.verbose = False
1324
1325     def run(self, args):
1326         sync = P4Sync()
1327         sync.run([])
1328         print "Rebasing the current branch"
1329         oldHead = read_pipe("git rev-parse HEAD").strip()
1330         system("git rebase p4")
1331         system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
1332         return True
1333
1334 class P4Clone(P4Sync):
1335     def __init__(self):
1336         P4Sync.__init__(self)
1337         self.description = "Creates a new git repository and imports from Perforce into it"
1338         self.usage = "usage: %prog [options] //depot/path[@revRange]"
1339         self.options.append(
1340             optparse.make_option("--destination", dest="cloneDestination",
1341                                  action='store', default=None,
1342                                  help="where to leave result of the clone"))
1343         self.cloneDestination = None
1344         self.needsGit = False
1345
1346     def defaultDestination(self, args):
1347         ## TODO: use common prefix of args?
1348         depotPath = args[0]
1349         depotDir = re.sub("(@[^@]*)$", "", depotPath)
1350         depotDir = re.sub("(#[^#]*)$", "", depotDir)
1351         depotDir = re.sub(r"\.\.\.$,", "", depotDir)
1352         depotDir = re.sub(r"/$", "", depotDir)
1353         return os.path.split(depotDir)[1]
1354
1355     def run(self, args):
1356         if len(args) < 1:
1357             return False
1358
1359         if self.keepRepoPath and not self.cloneDestination:
1360             sys.stderr.write("Must specify destination for --keep-path\n")
1361             sys.exit(1)
1362
1363         depotPaths = args
1364         for p in depotPaths:
1365             if not p.startswith("//"):
1366                 return False
1367
1368         if not self.cloneDestination:
1369             self.cloneDestination = self.defaultDestination()
1370
1371         print "Importing from %s into %s" % (', '.join(depotPaths), self.cloneDestination)
1372         os.makedirs(self.cloneDestination)
1373         os.chdir(self.cloneDestination)
1374         system("git init")
1375         self.gitdir = os.getcwd() + "/.git"
1376         if not P4Sync.run(self, depotPaths):
1377             return False
1378         if self.branch != "master":
1379             if gitBranchExists("refs/remotes/p4/master"):
1380                 system("git branch master refs/remotes/p4/master")
1381                 system("git checkout -f")
1382             else:
1383                 print "Could not detect main branch. No checkout/master branch created."
1384
1385         return True
1386
1387 class HelpFormatter(optparse.IndentedHelpFormatter):
1388     def __init__(self):
1389         optparse.IndentedHelpFormatter.__init__(self)
1390
1391     def format_description(self, description):
1392         if description:
1393             return description + "\n"
1394         else:
1395             return ""
1396
1397 def printUsage(commands):
1398     print "usage: %s <command> [options]" % sys.argv[0]
1399     print ""
1400     print "valid commands: %s" % ", ".join(commands)
1401     print ""
1402     print "Try %s <command> --help for command specific help." % sys.argv[0]
1403     print ""
1404
1405 commands = {
1406     "debug" : P4Debug,
1407     "submit" : P4Submit,
1408     "sync" : P4Sync,
1409     "rebase" : P4Rebase,
1410     "clone" : P4Clone,
1411     "rollback" : P4RollBack
1412 }
1413
1414
1415 def main():
1416     if len(sys.argv[1:]) == 0:
1417         printUsage(commands.keys())
1418         sys.exit(2)
1419
1420     cmd = ""
1421     cmdName = sys.argv[1]
1422     try:
1423         klass = commands[cmdName]
1424         cmd = klass()
1425     except KeyError:
1426         print "unknown command %s" % cmdName
1427         print ""
1428         printUsage(commands.keys())
1429         sys.exit(2)
1430
1431     options = cmd.options
1432     cmd.gitdir = os.environ.get("GIT_DIR", None)
1433
1434     args = sys.argv[2:]
1435
1436     if len(options) > 0:
1437         options.append(optparse.make_option("--git-dir", dest="gitdir"))
1438
1439         parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
1440                                        options,
1441                                        description = cmd.description,
1442                                        formatter = HelpFormatter())
1443
1444         (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
1445     global verbose
1446     verbose = cmd.verbose
1447     if cmd.needsGit:
1448         if cmd.gitdir == None:
1449             cmd.gitdir = os.path.abspath(".git")
1450             if not isValidGitDir(cmd.gitdir):
1451                 cmd.gitdir = read_pipe("git rev-parse --git-dir").strip()
1452                 if os.path.exists(cmd.gitdir):
1453                     cdup = read_pipe("git rev-parse --show-cdup").strip()
1454                     if len(cdup) > 0:
1455                         os.chdir(cdup);
1456
1457         if not isValidGitDir(cmd.gitdir):
1458             if isValidGitDir(cmd.gitdir + "/.git"):
1459                 cmd.gitdir += "/.git"
1460             else:
1461                 die("fatal: cannot locate git repository at %s" % cmd.gitdir)
1462
1463         os.environ["GIT_DIR"] = cmd.gitdir
1464
1465     if not cmd.run(args):
1466         parser.print_help()
1467
1468
1469 if __name__ == '__main__':
1470     main()