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     if paths:
 160         values['depot-paths'] = paths.split(',')
 161     return values
 162
 163 def gitBranchExists(branch):
 164     proc = subprocess.Popen(["git", "rev-parse", branch],
 165                             stderr=subprocess.PIPE, stdout=subprocess.PIPE);
 166     return proc.wait() == 0;
 167
 168 def gitConfig(key):
 169     return read_pipe("git config %s" % key, ignore_error=True).strip()
 170
 171 def findUpstreamBranchPoint():
 172     settings = None
 173     branchPoint = ""
 174     parent = 0
 175     while parent < 65535:
 176         commit = "HEAD~%s" % parent
 177         log = extractLogMessageFromGitCommit(commit)
 178         settings = extractSettingsGitLog(log)
 179         if not settings.has_key("depot-paths"):
 180             parent = parent + 1
 181             continue
 182
 183         names = read_pipe_lines("git name-rev \"--refs=refs/remotes/p4/*\" \"%s\"" % commit)
 184         if len(names) <= 0:
 185             continue
 186
 187         # strip away the beginning of 'HEAD~42 refs/remotes/p4/foo'
 188         branchPoint = names[0].strip()[len(commit) + 1:]
 189         break
 190
 191     return [branchPoint, settings]
 192
 193 class Command:
 194     def __init__(self):
 195         self.usage = "usage: %prog [options]"
 196         self.needsGit = True
 197
 198 class P4Debug(Command):
 199     def __init__(self):
 200         Command.__init__(self)
 201         self.options = [
 202             optparse.make_option("--verbose", dest="verbose", action="store_true",
 203                                  default=False),
 204             ]
 205         self.description = "A tool to debug the output of p4 -G."
 206         self.needsGit = False
 207         self.verbose = False
 208
 209     def run(self, args):
 210         j = 0
 211         for output in p4CmdList(" ".join(args)):
 212             print 'Element: %d' % j
 213             j += 1
 214             print output
 215         return True
 216
 217 class P4RollBack(Command):
 218     def __init__(self):
 219         Command.__init__(self)
 220         self.options = [
 221             optparse.make_option("--verbose", dest="verbose", action="store_true"),
 222             optparse.make_option("--local", dest="rollbackLocalBranches", action="store_true")
 223         ]
 224         self.description = "A tool to debug the multi-branch import. Don't use :)"
 225         self.verbose = False
 226         self.rollbackLocalBranches = False
 227
 228     def run(self, args):
 229         if len(args) != 1:
 230             return False
 231         maxChange = int(args[0])
 232
 233         if "p4ExitCode" in p4Cmd("changes -m 1"):
 234             die("Problems executing p4");
 235
 236         if self.rollbackLocalBranches:
 237             refPrefix = "refs/heads/"
 238             lines = read_pipe_lines("git rev-parse --symbolic --branches")
 239         else:
 240             refPrefix = "refs/remotes/"
 241             lines = read_pipe_lines("git rev-parse --symbolic --remotes")
 242
 243         for line in lines:
 244             if self.rollbackLocalBranches or (line.startswith("p4/") and line != "p4/HEAD\n"):
 245                 line = line.strip()
 246                 ref = refPrefix + line
 247                 log = extractLogMessageFromGitCommit(ref)
 248                 settings = extractSettingsGitLog(log)
 249
 250                 depotPaths = settings['depot-paths']
 251                 change = settings['change']
 252
 253                 changed = False
 254
 255                 if len(p4Cmd("changes -m 1 "  + ' '.join (['%s...@%s' % (p, maxChange)
 256                                                            for p in depotPaths]))) == 0:
 257                     print "Branch %s did not exist at change %s, deleting." % (ref, maxChange)
 258                     system("git update-ref -d %s `git rev-parse %s`" % (ref, ref))
 259                     continue
 260
 261                 while change and int(change) > maxChange:
 262                     changed = True
 263                     if self.verbose:
 264                         print "%s is at %s ; rewinding towards %s" % (ref, change, maxChange)
 265                     system("git update-ref %s \"%s^\"" % (ref, ref))
 266                     log = extractLogMessageFromGitCommit(ref)
 267                     settings =  extractSettingsGitLog(log)
 268
 269
 270                     depotPaths = settings['depot-paths']
 271                     change = settings['change']
 272
 273                 if changed:
 274                     print "%s rewound to %s" % (ref, change)
 275
 276         return True
 277
 278 class P4Submit(Command):
 279     def __init__(self):
 280         Command.__init__(self)
 281         self.options = [
 282                 optparse.make_option("--continue", action="store_false", dest="firstTime"),
 283                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 284                 optparse.make_option("--origin", dest="origin"),
 285                 optparse.make_option("--reset", action="store_true", dest="reset"),
 286                 optparse.make_option("--log-substitutions", dest="substFile"),
 287                 optparse.make_option("--dry-run", action="store_true"),
 288                 optparse.make_option("--direct", dest="directSubmit", action="store_true"),
 289                 optparse.make_option("--trust-me-like-a-fool", dest="trustMeLikeAFool", action="store_true"),
 290         ]
 291         self.description = "Submit changes from git to the perforce depot."
 292         self.usage += " [name of git branch to submit into perforce depot]"
 293         self.firstTime = True
 294         self.reset = False
 295         self.interactive = True
 296         self.dryRun = False
 297         self.substFile = ""
 298         self.firstTime = True
 299         self.origin = ""
 300         self.directSubmit = False
 301         self.trustMeLikeAFool = False
 302         self.verbose = False
 303         self.isWindows = (platform.system() == "Windows")
 304
 305         self.logSubstitutions = {}
 306         self.logSubstitutions["<enter description here>"] = "%log%"
 307         self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
 308
 309     def check(self):
 310         if len(p4CmdList("opened ...")) > 0:
 311             die("You have files opened with perforce! Close them before starting the sync.")
 312
 313     def start(self):
 314         if len(self.config) > 0 and not self.reset:
 315             die("Cannot start sync. Previous sync config found at %s\n"
 316                 "If you want to start submitting again from scratch "
 317                 "maybe you want to call git-p4 submit --reset" % self.configFile)
 318
 319         commits = []
 320         if self.directSubmit:
 321             commits.append("0")
 322         else:
 323             for line in read_pipe_lines("git rev-list --no-merges %s..%s" % (self.origin, self.master)):
 324                 commits.append(line.strip())
 325             commits.reverse()
 326
 327         self.config["commits"] = commits
 328
 329     def prepareLogMessage(self, template, message):
 330         result = ""
 331
 332         for line in template.split("\n"):
 333             if line.startswith("#"):
 334                 result += line + "\n"
 335                 continue
 336
 337             substituted = False
 338             for key in self.logSubstitutions.keys():
 339                 if line.find(key) != -1:
 340                     value = self.logSubstitutions[key]
 341                     value = value.replace("%log%", message)
 342                     if value != "@remove@":
 343                         result += line.replace(key, value) + "\n"
 344                     substituted = True
 345                     break
 346
 347             if not substituted:
 348                 result += line + "\n"
 349
 350         return result
 351
 352     def applyCommit(self, id):
 353         if self.directSubmit:
 354             print "Applying local change in working directory/index"
 355             diff = self.diffStatus
 356         else:
 357             print "Applying %s" % (read_pipe("git log --max-count=1 --pretty=oneline %s" % id))
 358             diff = read_pipe_lines("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id))
 359         filesToAdd = set()
 360         filesToDelete = set()
 361         editedFiles = set()
 362         for line in diff:
 363             modifier = line[0]
 364             path = line[1:].strip()
 365             if modifier == "M":
 366                 system("p4 edit \"%s\"" % path)
 367                 editedFiles.add(path)
 368             elif modifier == "A":
 369                 filesToAdd.add(path)
 370                 if path in filesToDelete:
 371                     filesToDelete.remove(path)
 372             elif modifier == "D":
 373                 filesToDelete.add(path)
 374                 if path in filesToAdd:
 375                     filesToAdd.remove(path)
 376             else:
 377                 die("unknown modifier %s for %s" % (modifier, path))
 378
 379         if self.directSubmit:
 380             diffcmd = "cat \"%s\"" % self.diffFile
 381         else:
 382             diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
 383         patchcmd = diffcmd + " | git apply "
 384         tryPatchCmd = patchcmd + "--check -"
 385         applyPatchCmd = patchcmd + "--check --apply -"
 386
 387         if os.system(tryPatchCmd) != 0:
 388             print "Unfortunately applying the change failed!"
 389             print "What do you want to do?"
 390             response = "x"
 391             while response != "s" and response != "a" and response != "w":
 392                 response = raw_input("[s]kip this patch / [a]pply the patch forcibly "
 393                                      "and with .rej files / [w]rite the patch to a file (patch.txt) ")
 394             if response == "s":
 395                 print "Skipping! Good luck with the next patches..."
 396                 return
 397             elif response == "a":
 398                 os.system(applyPatchCmd)
 399                 if len(filesToAdd) > 0:
 400                     print "You may also want to call p4 add on the following files:"
 401                     print " ".join(filesToAdd)
 402                 if len(filesToDelete):
 403                     print "The following files should be scheduled for deletion with p4 delete:"
 404                     print " ".join(filesToDelete)
 405                 die("Please resolve and submit the conflict manually and "
 406                     + "continue afterwards with git-p4 submit --continue")
 407             elif response == "w":
 408                 system(diffcmd + " > patch.txt")
 409                 print "Patch saved to patch.txt in %s !" % self.clientPath
 410                 die("Please resolve and submit the conflict manually and "
 411                     "continue afterwards with git-p4 submit --continue")
 412
 413         system(applyPatchCmd)
 414
 415         for f in filesToAdd:
 416             system("p4 add \"%s\"" % f)
 417         for f in filesToDelete:
 418             system("p4 revert \"%s\"" % f)
 419             system("p4 delete \"%s\"" % f)
 420
 421         logMessage = ""
 422         if not self.directSubmit:
 423             logMessage = extractLogMessageFromGitCommit(id)
 424             logMessage = logMessage.replace("\n", "\n\t")
 425             if self.isWindows:
 426                 logMessage = logMessage.replace("\n", "\r\n")
 427             logMessage = logMessage.strip()
 428
 429         template = read_pipe("p4 change -o")
 430
 431         if self.interactive:
 432             submitTemplate = self.prepareLogMessage(template, logMessage)
 433             diff = read_pipe("p4 diff -du ...")
 434
 435             for newFile in filesToAdd:
 436                 diff += "==== new file ====\n"
 437                 diff += "--- /dev/null\n"
 438                 diff += "+++ %s\n" % newFile
 439                 f = open(newFile, "r")
 440                 for line in f.readlines():
 441                     diff += "+" + line
 442                 f.close()
 443
 444             separatorLine = "######## everything below this line is just the diff #######"
 445             if platform.system() == "Windows":
 446                 separatorLine += "\r"
 447             separatorLine += "\n"
 448
 449             response = "e"
 450             if self.trustMeLikeAFool:
 451                 response = "y"
 452
 453             firstIteration = True
 454             while response == "e":
 455                 if not firstIteration:
 456                     response = raw_input("Do you want to submit this change? [y]es/[e]dit/[n]o/[s]kip ")
 457                 firstIteration = False
 458                 if response == "e":
 459                     [handle, fileName] = tempfile.mkstemp()
 460                     tmpFile = os.fdopen(handle, "w+")
 461                     tmpFile.write(submitTemplate + separatorLine + diff)
 462                     tmpFile.close()
 463                     defaultEditor = "vi"
 464                     if platform.system() == "Windows":
 465                         defaultEditor = "notepad"
 466                     editor = os.environ.get("EDITOR", defaultEditor);
 467                     system(editor + " " + fileName)
 468                     tmpFile = open(fileName, "rb")
 469                     message = tmpFile.read()
 470                     tmpFile.close()
 471                     os.remove(fileName)
 472                     submitTemplate = message[:message.index(separatorLine)]
 473                     if self.isWindows:
 474                         submitTemplate = submitTemplate.replace("\r\n", "\n")
 475
 476             if response == "y" or response == "yes":
 477                if self.dryRun:
 478                    print submitTemplate
 479                    raw_input("Press return to continue...")
 480                else:
 481                    if self.directSubmit:
 482                        print "Submitting to git first"
 483                        os.chdir(self.oldWorkingDirectory)
 484                        write_pipe("git commit -a -F -", submitTemplate)
 485                        os.chdir(self.clientPath)
 486
 487                    write_pipe("p4 submit -i", submitTemplate)
 488             elif response == "s":
 489                 for f in editedFiles:
 490                     system("p4 revert \"%s\"" % f);
 491                 for f in filesToAdd:
 492                     system("p4 revert \"%s\"" % f);
 493                     system("rm %s" %f)
 494                 for f in filesToDelete:
 495                     system("p4 delete \"%s\"" % f);
 496                 return
 497             else:
 498                 print "Not submitting!"
 499                 self.interactive = False
 500         else:
 501             fileName = "submit.txt"
 502             file = open(fileName, "w+")
 503             file.write(self.prepareLogMessage(template, logMessage))
 504             file.close()
 505             print ("Perforce submit template written as %s. "
 506                    + "Please review/edit and then use p4 submit -i < %s to submit directly!"
 507                    % (fileName, fileName))
 508
 509     def run(self, args):
 510         if len(args) == 0:
 511             self.master = currentGitBranch()
 512             if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
 513                 die("Detecting current git branch failed!")
 514         elif len(args) == 1:
 515             self.master = args[0]
 516         else:
 517             return False
 518
 519         [upstream, settings] = findUpstreamBranchPoint()
 520         depotPath = settings['depot-paths'][0]
 521         if len(self.origin) == 0:
 522             self.origin = upstream
 523
 524         if self.verbose:
 525             print "Origin branch is " + self.origin
 526
 527         if len(depotPath) == 0:
 528             print "Internal error: cannot locate perforce depot path from existing branches"
 529             sys.exit(128)
 530
 531         self.clientPath = p4Where(depotPath)
 532
 533         if len(self.clientPath) == 0:
 534             print "Error: Cannot locate perforce checkout of %s in client view" % depotPath
 535             sys.exit(128)
 536
 537         print "Perforce checkout for depot path %s located at %s" % (depotPath, self.clientPath)
 538         self.oldWorkingDirectory = os.getcwd()
 539
 540         if self.directSubmit:
 541             self.diffStatus = read_pipe_lines("git diff -r --name-status HEAD")
 542             if len(self.diffStatus) == 0:
 543                 print "No changes in working directory to submit."
 544                 return True
 545             patch = read_pipe("git diff -p --binary --diff-filter=ACMRTUXB HEAD")
 546             self.diffFile = self.gitdir + "/p4-git-diff"
 547             f = open(self.diffFile, "wb")
 548             f.write(patch)
 549             f.close();
 550
 551         os.chdir(self.clientPath)
 552         response = raw_input("Do you want to sync %s with p4 sync? [y]es/[n]o " % self.clientPath)
 553         if response == "y" or response == "yes":
 554             system("p4 sync ...")
 555
 556         if self.reset:
 557             self.firstTime = True
 558
 559         if len(self.substFile) > 0:
 560             for line in open(self.substFile, "r").readlines():
 561                 tokens = line.strip().split("=")
 562                 self.logSubstitutions[tokens[0]] = tokens[1]
 563
 564         self.check()
 565         self.configFile = self.gitdir + "/p4-git-sync.cfg"
 566         self.config = shelve.open(self.configFile, writeback=True)
 567
 568         if self.firstTime:
 569             self.start()
 570
 571         commits = self.config.get("commits", [])
 572
 573         while len(commits) > 0:
 574             self.firstTime = False
 575             commit = commits[0]
 576             commits = commits[1:]
 577             self.config["commits"] = commits
 578             self.applyCommit(commit)
 579             if not self.interactive:
 580                 break
 581
 582         self.config.close()
 583
 584         if self.directSubmit:
 585             os.remove(self.diffFile)
 586
 587         if len(commits) == 0:
 588             if self.firstTime:
 589                 print "No changes found to apply between %s and current HEAD" % self.origin
 590             else:
 591                 print "All changes applied!"
 592                 os.chdir(self.oldWorkingDirectory)
 593                 response = raw_input("Do you want to sync from Perforce now using git-p4 rebase? [y]es/[n]o ")
 594                 if response == "y" or response == "yes":
 595                     rebase = P4Rebase()
 596                     rebase.run([])
 597             os.remove(self.configFile)
 598
 599         return True
 600
 601 class P4Sync(Command):
 602     def __init__(self):
 603         Command.__init__(self)
 604         self.options = [
 605                 optparse.make_option("--branch", dest="branch"),
 606                 optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
 607                 optparse.make_option("--changesfile", dest="changesFile"),
 608                 optparse.make_option("--silent", dest="silent", action="store_true"),
 609                 optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
 610                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
 611                 optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false",
 612                                      help="Import into refs/heads/ , not refs/remotes"),
 613                 optparse.make_option("--max-changes", dest="maxChanges"),
 614                 optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true',
 615                                      help="Keep entire BRANCH/DIR/SUBDIR prefix during import")
 616         ]
 617         self.description = """Imports from Perforce into a git repository.\n
 618     example:
 619     //depot/my/project/ -- to import the current head
 620     //depot/my/project/@all -- to import everything
 621     //depot/my/project/@1,6 -- to import only from revision 1 to 6
 622
 623     (a ... is not needed in the path p4 specification, it's added implicitly)"""
 624
 625         self.usage += " //depot/path[@revRange]"
 626         self.silent = False
 627         self.createdBranches = Set()
 628         self.committedChanges = Set()
 629         self.branch = ""
 630         self.detectBranches = False
 631         self.detectLabels = False
 632         self.changesFile = ""
 633         self.syncWithOrigin = True
 634         self.verbose = False
 635         self.importIntoRemotes = True
 636         self.maxChanges = ""
 637         self.isWindows = (platform.system() == "Windows")
 638         self.keepRepoPath = False
 639         self.depotPaths = None
 640         self.p4BranchesInGit = []
 641
 642         if gitConfig("git-p4.syncFromOrigin") == "false":
 643             self.syncWithOrigin = False
 644
 645     def extractFilesFromCommit(self, commit):
 646         files = []
 647         fnum = 0
 648         while commit.has_key("depotFile%s" % fnum):
 649             path =  commit["depotFile%s" % fnum]
 650
 651             found = [p for p in self.depotPaths
 652                      if path.startswith (p)]
 653             if not found:
 654                 fnum = fnum + 1
 655                 continue
 656
 657             file = {}
 658             file["path"] = path
 659             file["rev"] = commit["rev%s" % fnum]
 660             file["action"] = commit["action%s" % fnum]
 661             file["type"] = commit["type%s" % fnum]
 662             files.append(file)
 663             fnum = fnum + 1
 664         return files
 665
 666     def stripRepoPath(self, path, prefixes):
 667         if self.keepRepoPath:
 668             prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
 669
 670         for p in prefixes:
 671             if path.startswith(p):
 672                 path = path[len(p):]
 673
 674         return path
 675
 676     def splitFilesIntoBranches(self, commit):
 677         branches = {}
 678         fnum = 0
 679         while commit.has_key("depotFile%s" % fnum):
 680             path =  commit["depotFile%s" % fnum]
 681             found = [p for p in self.depotPaths
 682                      if path.startswith (p)]
 683             if not found:
 684                 fnum = fnum + 1
 685                 continue
 686
 687             file = {}
 688             file["path"] = path
 689             file["rev"] = commit["rev%s" % fnum]
 690             file["action"] = commit["action%s" % fnum]
 691             file["type"] = commit["type%s" % fnum]
 692             fnum = fnum + 1
 693
 694             relPath = self.stripRepoPath(path, self.depotPaths)
 695
 696             for branch in self.knownBranches.keys():
 697
 698                 # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
 699                 if relPath.startswith(branch + "/"):
 700                     if branch not in branches:
 701                         branches[branch] = []
 702                     branches[branch].append(file)
 703
 704         return branches
 705
 706     ## Should move this out, doesn't use SELF.
 707     def readP4Files(self, files):
 708         files = [f for f in files
 709                  if f['action'] != 'delete']
 710
 711         if not files:
 712             return
 713
 714         filedata = p4CmdList('print %s' % ' '.join(['"%s#%s"' % (f['path'],
 715                                                                  f['rev'])
 716                                                     for f in files]))
 717
 718         j = 0;
 719         contents = {}
 720         while j < len(filedata):
 721             stat = filedata[j]
 722             j += 1
 723             text = ''
 724             while j < len(filedata) and filedata[j]['code'] in ('text',
 725                                                                 'binary'):
 726                 text += filedata[j]['data']
 727                 j += 1
 728
 729
 730             if not stat.has_key('depotFile'):
 731                 sys.stderr.write("p4 print fails with: %s\n" % repr(stat))
 732                 continue
 733
 734             contents[stat['depotFile']] = text
 735
 736         for f in files:
 737             assert not f.has_key('data')
 738             f['data'] = contents[f['path']]
 739
 740     def commit(self, details, files, branch, branchPrefixes, parent = ""):
 741         epoch = details["time"]
 742         author = details["user"]
 743
 744         if self.verbose:
 745             print "commit into %s" % branch
 746
 747         # start with reading files; if that fails, we should not
 748         # create a commit.
 749         new_files = []
 750         for f in files:
 751             if [p for p in branchPrefixes if f['path'].startswith(p)]:
 752                 new_files.append (f)
 753             else:
 754                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % path)
 755         files = new_files
 756         self.readP4Files(files)
 757
 758
 759
 760
 761         self.gitStream.write("commit %s\n" % branch)
 762 #        gitStream.write("mark :%s\n" % details["change"])
 763         self.committedChanges.add(int(details["change"]))
 764         committer = ""
 765         if author not in self.users:
 766             self.getUserMapFromPerforceServer()
 767         if author in self.users:
 768             committer = "%s %s %s" % (self.users[author], epoch, self.tz)
 769         else:
 770             committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
 771
 772         self.gitStream.write("committer %s\n" % committer)
 773
 774         self.gitStream.write("data <<EOT\n")
 775         self.gitStream.write(details["desc"])
 776         self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s"
 777                              % (','.join (branchPrefixes), details["change"]))
 778         if len(details['options']) > 0:
 779             self.gitStream.write(": options = %s" % details['options'])
 780         self.gitStream.write("]\nEOT\n\n")
 781
 782         if len(parent) > 0:
 783             if self.verbose:
 784                 print "parent %s" % parent
 785             self.gitStream.write("from %s\n" % parent)
 786
 787         for file in files:
 788             if file["type"] == "apple":
 789                 print "\nfile %s is a strange apple file that forks. Ignoring!" % file['path']
 790                 continue
 791
 792             relPath = self.stripRepoPath(file['path'], branchPrefixes)
 793             if file["action"] == "delete":
 794                 self.gitStream.write("D %s\n" % relPath)
 795             else:
 796                 mode = 644
 797                 if file["type"].startswith("x"):
 798                     mode = 755
 799
 800                 data = file['data']
 801
 802                 if self.isWindows and file["type"].endswith("text"):
 803                     data = data.replace("\r\n", "\n")
 804
 805                 self.gitStream.write("M %d inline %s\n" % (mode, relPath))
 806                 self.gitStream.write("data %s\n" % len(data))
 807                 self.gitStream.write(data)
 808                 self.gitStream.write("\n")
 809
 810         self.gitStream.write("\n")
 811
 812         change = int(details["change"])
 813
 814         if self.labels.has_key(change):
 815             label = self.labels[change]
 816             labelDetails = label[0]
 817             labelRevisions = label[1]
 818             if self.verbose:
 819                 print "Change %s is labelled %s" % (change, labelDetails)
 820
 821             files = p4CmdList("files " + ' '.join (["%s...@%s" % (p, change)
 822                                                     for p in branchPrefixes]))
 823
 824             if len(files) == len(labelRevisions):
 825
 826                 cleanedFiles = {}
 827                 for info in files:
 828                     if info["action"] == "delete":
 829                         continue
 830                     cleanedFiles[info["depotFile"]] = info["rev"]
 831
 832                 if cleanedFiles == labelRevisions:
 833                     self.gitStream.write("tag tag_%s\n" % labelDetails["label"])
 834                     self.gitStream.write("from %s\n" % branch)
 835
 836                     owner = labelDetails["Owner"]
 837                     tagger = ""
 838                     if author in self.users:
 839                         tagger = "%s %s %s" % (self.users[owner], epoch, self.tz)
 840                     else:
 841                         tagger = "%s <a@b> %s %s" % (owner, epoch, self.tz)
 842                     self.gitStream.write("tagger %s\n" % tagger)
 843                     self.gitStream.write("data <<EOT\n")
 844                     self.gitStream.write(labelDetails["Description"])
 845                     self.gitStream.write("EOT\n\n")
 846
 847                 else:
 848                     if not self.silent:
 849                         print ("Tag %s does not match with change %s: files do not match."
 850                                % (labelDetails["label"], change))
 851
 852             else:
 853                 if not self.silent:
 854                     print ("Tag %s does not match with change %s: file count is different."
 855                            % (labelDetails["label"], change))
 856
 857     def getUserCacheFilename(self):
 858         return os.environ["HOME"] + "/.gitp4-usercache.txt"
 859
 860     def getUserMapFromPerforceServer(self):
 861         if self.userMapFromPerforceServer:
 862             return
 863         self.users = {}
 864
 865         for output in p4CmdList("users"):
 866             if not output.has_key("User"):
 867                 continue
 868             self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 869
 870
 871         s = ''
 872         for (key, val) in self.users.items():
 873             s += "%s\t%s\n" % (key, val)
 874
 875         open(self.getUserCacheFilename(), "wb").write(s)
 876         self.userMapFromPerforceServer = True
 877
 878     def loadUserMapFromCache(self):
 879         self.users = {}
 880         self.userMapFromPerforceServer = False
 881         try:
 882             cache = open(self.getUserCacheFilename(), "rb")
 883             lines = cache.readlines()
 884             cache.close()
 885             for line in lines:
 886                 entry = line.strip().split("\t")
 887                 self.users[entry[0]] = entry[1]
 888         except IOError:
 889             self.getUserMapFromPerforceServer()
 890
 891     def getLabels(self):
 892         self.labels = {}
 893
 894         l = p4CmdList("labels %s..." % ' '.join (self.depotPaths))
 895         if len(l) > 0 and not self.silent:
 896             print "Finding files belonging to labels in %s" % `self.depotPath`
 897
 898         for output in l:
 899             label = output["label"]
 900             revisions = {}
 901             newestChange = 0
 902             if self.verbose:
 903                 print "Querying files for label %s" % label
 904             for file in p4CmdList("files "
 905                                   +  ' '.join (["%s...@%s" % (p, label)
 906                                                 for p in self.depotPaths])):
 907                 revisions[file["depotFile"]] = file["rev"]
 908                 change = int(file["change"])
 909                 if change > newestChange:
 910                     newestChange = change
 911
 912             self.labels[newestChange] = [output, revisions]
 913
 914         if self.verbose:
 915             print "Label changes: %s" % self.labels.keys()
 916
 917     def guessProjectName(self):
 918         for p in self.depotPaths:
 919             if p.endswith("/"):
 920                 p = p[:-1]
 921             p = p[p.strip().rfind("/") + 1:]
 922             if not p.endswith("/"):
 923                p += "/"
 924             return p
 925
 926     def getBranchMapping(self):
 927         for info in p4CmdList("branches"):
 928             details = p4Cmd("branch -o %s" % info["branch"])
 929             viewIdx = 0
 930             while details.has_key("View%s" % viewIdx):
 931                 paths = details["View%s" % viewIdx].split(" ")
 932                 viewIdx = viewIdx + 1
 933                 # require standard //depot/foo/... //depot/bar/... mapping
 934                 if len(paths) != 2 or not paths[0].endswith("/...") or not paths[1].endswith("/..."):
 935                     continue
 936                 source = paths[0]
 937                 destination = paths[1]
 938                 ## HACK
 939                 if source.startswith(self.depotPaths[0]) and destination.startswith(self.depotPaths[0]):
 940                     source = source[len(self.depotPaths[0]):-4]
 941                     destination = destination[len(self.depotPaths[0]):-4]
 942                     if destination not in self.knownBranches:
 943                         self.knownBranches[destination] = source
 944                     if source not in self.knownBranches:
 945                         self.knownBranches[source] = source
 946
 947     def listExistingP4GitBranches(self):
 948         self.p4BranchesInGit = []
 949
 950         cmdline = "git rev-parse --symbolic "
 951         if self.importIntoRemotes:
 952             cmdline += " --remotes"
 953         else:
 954             cmdline += " --branches"
 955
 956         for line in read_pipe_lines(cmdline):
 957             line = line.strip()
 958
 959             ## only import to p4/
 960             if not line.startswith('p4/') or line == "p4/HEAD":
 961                 continue
 962             branch = line
 963
 964             # strip off p4
 965             branch = re.sub ("^p4/", "", line)
 966
 967             self.p4BranchesInGit.append(branch)
 968             self.initialParents[self.refPrefix + branch] = parseRevision(line)
 969
 970     def createOrUpdateBranchesFromOrigin(self):
 971         if not self.silent:
 972             print ("Creating/updating branch(es) in %s based on origin branch(es)"
 973                    % self.refPrefix)
 974
 975         originPrefix = "origin/p4/"
 976
 977         for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
 978             line = line.strip()
 979             if (not line.startswith(originPrefix)) or line.endswith("HEAD"):
 980                 continue
 981
 982             headName = line[len(originPrefix):]
 983             remoteHead = self.refPrefix + headName
 984             originHead = line
 985
 986             original = extractSettingsGitLog(extractLogMessageFromGitCommit(originHead))
 987             if (not original.has_key('depot-paths')
 988                 or not original.has_key('change')):
 989                 continue
 990
 991             update = False
 992             if not gitBranchExists(remoteHead):
 993                 if self.verbose:
 994                     print "creating %s" % remoteHead
 995                 update = True
 996             else:
 997                 settings = extractSettingsGitLog(extractLogMessageFromGitCommit(remoteHead))
 998                 if settings.has_key('change') > 0:
 999                     if settings['depot-paths'] == original['depot-paths']:
1000                         originP4Change = int(original['change'])
1001                         p4Change = int(settings['change'])
1002                         if originP4Change > p4Change:
1003                             print ("%s (%s) is newer than %s (%s). "
1004                                    "Updating p4 branch from origin."
1005                                    % (originHead, originP4Change,
1006                                       remoteHead, p4Change))
1007                             update = True
1008                     else:
1009                         print ("Ignoring: %s was imported from %s while "
1010                                "%s was imported from %s"
1011                                % (originHead, ','.join(original['depot-paths']),
1012                                   remoteHead, ','.join(settings['depot-paths'])))
1013
1014             if update:
1015                 system("git update-ref %s %s" % (remoteHead, originHead))
1016
1017     def updateOptionDict(self, d):
1018         option_keys = {}
1019         if self.keepRepoPath:
1020             option_keys['keepRepoPath'] = 1
1021
1022         d["options"] = ' '.join(sorted(option_keys.keys()))
1023
1024     def readOptions(self, d):
1025         self.keepRepoPath = (d.has_key('options')
1026                              and ('keepRepoPath' in d['options']))
1027
1028     def run(self, args):
1029         self.depotPaths = []
1030         self.changeRange = ""
1031         self.initialParent = ""
1032         self.previousDepotPaths = []
1033
1034         # map from branch depot path to parent branch
1035         self.knownBranches = {}
1036         self.initialParents = {}
1037         self.hasOrigin = gitBranchExists("origin") or gitBranchExists("origin/p4") or gitBranchExists("origin/p4/master")
1038         if not self.syncWithOrigin:
1039             self.hasOrigin = False
1040
1041         if self.importIntoRemotes:
1042             self.refPrefix = "refs/remotes/p4/"
1043         else:
1044             self.refPrefix = "refs/heads/p4/"
1045
1046         if self.syncWithOrigin and self.hasOrigin:
1047             if not self.silent:
1048                 print "Syncing with origin first by calling git fetch origin"
1049             system("git fetch origin")
1050
1051         if len(self.branch) == 0:
1052             self.branch = self.refPrefix + "master"
1053             if gitBranchExists("refs/heads/p4") and self.importIntoRemotes:
1054                 system("git update-ref %s refs/heads/p4" % self.branch)
1055                 system("git branch -D p4");
1056             # create it /after/ importing, when master exists
1057             if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes:
1058                 system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
1059
1060         # TODO: should always look at previous commits,
1061         # merge with previous imports, if possible.
1062         if args == []:
1063             if self.hasOrigin:
1064                 self.createOrUpdateBranchesFromOrigin()
1065             self.listExistingP4GitBranches()
1066
1067             if len(self.p4BranchesInGit) > 1:
1068                 if not self.silent:
1069                     print "Importing from/into multiple branches"
1070                 self.detectBranches = True
1071
1072             if self.verbose:
1073                 print "branches: %s" % self.p4BranchesInGit
1074
1075             p4Change = 0
1076             for branch in self.p4BranchesInGit:
1077                 logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
1078
1079                 settings = extractSettingsGitLog(logMsg)
1080
1081                 self.readOptions(settings)
1082                 if (settings.has_key('depot-paths')
1083                     and settings.has_key ('change')):
1084                     change = int(settings['change']) + 1
1085                     p4Change = max(p4Change, change)
1086
1087                     depotPaths = sorted(settings['depot-paths'])
1088                     if self.previousDepotPaths == []:
1089                         self.previousDepotPaths = depotPaths
1090                     else:
1091                         paths = []
1092                         for (prev, cur) in zip(self.previousDepotPaths, depotPaths):
1093                             for i in range(0, min(len(cur), len(prev))):
1094                                 if cur[i] <> prev[i]:
1095                                     i = i - 1
1096                                     break
1097
1098                             paths.append (cur[:i + 1])
1099
1100                         self.previousDepotPaths = paths
1101
1102             if p4Change > 0:
1103                 self.depotPaths = sorted(self.previousDepotPaths)
1104                 self.changeRange = "@%s,#head" % p4Change
1105                 if not self.detectBranches:
1106                     self.initialParent = parseRevision(self.branch)
1107                 if not self.silent and not self.detectBranches:
1108                     print "Performing incremental import into %s git branch" % self.branch
1109
1110         if not self.branch.startswith("refs/"):
1111             self.branch = "refs/heads/" + self.branch
1112
1113         if len(args) == 0 and self.depotPaths:
1114             if not self.silent:
1115                 print "Depot paths: %s" % ' '.join(self.depotPaths)
1116         else:
1117             if self.depotPaths and self.depotPaths != args:
1118                 print ("previous import used depot path %s and now %s was specified. "
1119                        "This doesn't work!" % (' '.join (self.depotPaths),
1120                                                ' '.join (args)))
1121                 sys.exit(1)
1122
1123             self.depotPaths = sorted(args)
1124
1125         self.revision = ""
1126         self.users = {}
1127
1128         newPaths = []
1129         for p in self.depotPaths:
1130             if p.find("@") != -1:
1131                 atIdx = p.index("@")
1132                 self.changeRange = p[atIdx:]
1133                 if self.changeRange == "@all":
1134                     self.changeRange = ""
1135                 elif ',' not in self.changeRange:
1136                     self.revision = self.changeRange
1137                     self.changeRange = ""
1138                 p = p[0:atIdx]
1139             elif p.find("#") != -1:
1140                 hashIdx = p.index("#")
1141                 self.revision = p[hashIdx:]
1142                 p = p[0:hashIdx]
1143             elif self.previousDepotPaths == []:
1144                 self.revision = "#head"
1145
1146             p = re.sub ("\.\.\.$", "", p)
1147             if not p.endswith("/"):
1148                 p += "/"
1149
1150             newPaths.append(p)
1151
1152         self.depotPaths = newPaths
1153
1154
1155         self.loadUserMapFromCache()
1156         self.labels = {}
1157         if self.detectLabels:
1158             self.getLabels();
1159
1160         if self.detectBranches:
1161             ## FIXME - what's a P4 projectName ?
1162             self.projectName = self.guessProjectName()
1163
1164             if not self.hasOrigin:
1165                 self.getBranchMapping();
1166             if self.verbose:
1167                 print "p4-git branches: %s" % self.p4BranchesInGit
1168                 print "initial parents: %s" % self.initialParents
1169             for b in self.p4BranchesInGit:
1170                 if b != "master":
1171
1172                     ## FIXME
1173                     b = b[len(self.projectName):]
1174                 self.createdBranches.add(b)
1175
1176         self.tz = "%+03d%02d" % (- time.timezone / 3600, ((- time.timezone % 3600) / 60))
1177
1178         importProcess = subprocess.Popen(["git", "fast-import"],
1179                                          stdin=subprocess.PIPE, stdout=subprocess.PIPE,
1180                                          stderr=subprocess.PIPE);
1181         self.gitOutput = importProcess.stdout
1182         self.gitStream = importProcess.stdin
1183         self.gitError = importProcess.stderr
1184
1185         if self.revision:
1186             print "Doing initial import of %s from revision %s into %s" % (' '.join(self.depotPaths), self.revision, self.branch)
1187
1188             details = { "user" : "git perforce import user", "time" : int(time.time()) }
1189             details["desc"] = ("Initial import of %s from the state at revision %s"
1190                                % (' '.join(self.depotPaths), self.revision))
1191             details["change"] = self.revision
1192             newestRevision = 0
1193
1194             fileCnt = 0
1195             for info in p4CmdList("files "
1196                                   +  ' '.join(["%s...%s"
1197                                                % (p, self.revision)
1198                                                for p in self.depotPaths])):
1199
1200                 if info['code'] == 'error':
1201                     sys.stderr.write("p4 returned an error: %s\n"
1202                                      % info['data'])
1203                     sys.exit(1)
1204
1205
1206                 change = int(info["change"])
1207                 if change > newestRevision:
1208                     newestRevision = change
1209
1210                 if info["action"] == "delete":
1211                     # don't increase the file cnt, otherwise details["depotFile123"] will have gaps!
1212                     #fileCnt = fileCnt + 1
1213                     continue
1214
1215                 for prop in ["depotFile", "rev", "action", "type" ]:
1216                     details["%s%s" % (prop, fileCnt)] = info[prop]
1217
1218                 fileCnt = fileCnt + 1
1219
1220             details["change"] = newestRevision
1221             self.updateOptionDict(details)
1222             try:
1223                 self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
1224             except IOError:
1225                 print "IO error with git fast-import. Is your git version recent enough?"
1226                 print self.gitError.read()
1227
1228         else:
1229             changes = []
1230
1231             if len(self.changesFile) > 0:
1232                 output = open(self.changesFile).readlines()
1233                 changeSet = Set()
1234                 for line in output:
1235                     changeSet.add(int(line))
1236
1237                 for change in changeSet:
1238                     changes.append(change)
1239
1240                 changes.sort()
1241             else:
1242                 if self.verbose:
1243                     print "Getting p4 changes for %s...%s" % (', '.join(self.depotPaths),
1244                                                               self.changeRange)
1245                 assert self.depotPaths
1246                 output = read_pipe_lines("p4 changes " + ' '.join (["%s...%s" % (p, self.changeRange)
1247                                                                     for p in self.depotPaths]))
1248
1249                 for line in output:
1250                     changeNum = line.split(" ")[1]
1251                     changes.append(changeNum)
1252
1253                 changes.reverse()
1254
1255                 if len(self.maxChanges) > 0:
1256                     changes = changes[0:min(int(self.maxChanges), len(changes))]
1257
1258             if len(changes) == 0:
1259                 if not self.silent:
1260                     print "No changes to import!"
1261                 return True
1262
1263             if not self.silent and not self.detectBranches:
1264                 print "Import destination: %s" % self.branch
1265
1266             self.updatedBranches = set()
1267
1268             cnt = 1
1269             for change in changes:
1270                 description = p4Cmd("describe %s" % change)
1271                 self.updateOptionDict(description)
1272
1273                 if not self.silent:
1274                     sys.stdout.write("\rImporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
1275                     sys.stdout.flush()
1276                 cnt = cnt + 1
1277
1278                 try:
1279                     if self.detectBranches:
1280                         branches = self.splitFilesIntoBranches(description)
1281                         for branch in branches.keys():
1282                             ## HACK  --hwn
1283                             branchPrefix = self.depotPaths[0] + branch + "/"
1284
1285                             parent = ""
1286
1287                             filesForCommit = branches[branch]
1288
1289                             if self.verbose:
1290                                 print "branch is %s" % branch
1291
1292                             self.updatedBranches.add(branch)
1293
1294                             if branch not in self.createdBranches:
1295                                 self.createdBranches.add(branch)
1296                                 parent = self.knownBranches[branch]
1297                                 if parent == branch:
1298                                     parent = ""
1299                                 elif self.verbose:
1300                                     print "parent determined through known branches: %s" % parent
1301
1302                             # main branch? use master
1303                             if branch == "main":
1304                                 branch = "master"
1305                             else:
1306
1307                                 ## FIXME
1308                                 branch = self.projectName + branch
1309
1310                             if parent == "main":
1311                                 parent = "master"
1312                             elif len(parent) > 0:
1313                                 ## FIXME
1314                                 parent = self.projectName + parent
1315
1316                             branch = self.refPrefix + branch
1317                             if len(parent) > 0:
1318                                 parent = self.refPrefix + parent
1319
1320                             if self.verbose:
1321                                 print "looking for initial parent for %s; current parent is %s" % (branch, parent)
1322
1323                             if len(parent) == 0 and branch in self.initialParents:
1324                                 parent = self.initialParents[branch]
1325                                 del self.initialParents[branch]
1326
1327                             self.commit(description, filesForCommit, branch, [branchPrefix], parent)
1328                     else:
1329                         files = self.extractFilesFromCommit(description)
1330                         self.commit(description, files, self.branch, self.depotPaths,
1331                                     self.initialParent)
1332                         self.initialParent = ""
1333                 except IOError:
1334                     print self.gitError.read()
1335                     sys.exit(1)
1336
1337             if not self.silent:
1338                 print ""
1339                 if len(self.updatedBranches) > 0:
1340                     sys.stdout.write("Updated branches: ")
1341                     for b in self.updatedBranches:
1342                         sys.stdout.write("%s " % b)
1343                     sys.stdout.write("\n")
1344
1345
1346         self.gitStream.close()
1347         if importProcess.wait() != 0:
1348             die("fast-import failed: %s" % self.gitError.read())
1349         self.gitOutput.close()
1350         self.gitError.close()
1351
1352         return True
1353
1354 class P4Rebase(Command):
1355     def __init__(self):
1356         Command.__init__(self)
1357         self.options = [ ]
1358         self.description = ("Fetches the latest revision from perforce and "
1359                             + "rebases the current work (branch) against it")
1360         self.verbose = False
1361
1362     def run(self, args):
1363         sync = P4Sync()
1364         sync.run([])
1365
1366         [upstream, settings] = findUpstreamBranchPoint()
1367         if len(upstream) == 0:
1368             die("Cannot find upstream branchpoint for rebase")
1369
1370         # the branchpoint may be p4/foo~3, so strip off the parent
1371         upstream = re.sub("~[0-9]+$", "", upstream)
1372
1373         print "Rebasing the current branch onto %s" % upstream
1374         oldHead = read_pipe("git rev-parse HEAD").strip()
1375         system("git rebase %s" % upstream)
1376         system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
1377         return True
1378
1379 class P4Clone(P4Sync):
1380     def __init__(self):
1381         P4Sync.__init__(self)
1382         self.description = "Creates a new git repository and imports from Perforce into it"
1383         self.usage = "usage: %prog [options] //depot/path[@revRange]"
1384         self.options.append(
1385             optparse.make_option("--destination", dest="cloneDestination",
1386                                  action='store', default=None,
1387                                  help="where to leave result of the clone"))
1388         self.cloneDestination = None
1389         self.needsGit = False
1390
1391     def defaultDestination(self, args):
1392         ## TODO: use common prefix of args?
1393         depotPath = args[0]
1394         depotDir = re.sub("(@[^@]*)$", "", depotPath)
1395         depotDir = re.sub("(#[^#]*)$", "", depotDir)
1396         depotDir = re.sub(r"\.\.\.$,", "", depotDir)
1397         depotDir = re.sub(r"/$", "", depotDir)
1398         return os.path.split(depotDir)[1]
1399
1400     def run(self, args):
1401         if len(args) < 1:
1402             return False
1403
1404         if self.keepRepoPath and not self.cloneDestination:
1405             sys.stderr.write("Must specify destination for --keep-path\n")
1406             sys.exit(1)
1407
1408         depotPaths = args
1409
1410         if not self.cloneDestination and len(depotPaths) > 1:
1411             self.cloneDestination = depotPaths[-1]
1412             depotPaths = depotPaths[:-1]
1413
1414         for p in depotPaths:
1415             if not p.startswith("//"):
1416                 return False
1417
1418         if not self.cloneDestination:
1419             self.cloneDestination = self.defaultDestination(args)
1420
1421         print "Importing from %s into %s" % (', '.join(depotPaths), self.cloneDestination)
1422         if not os.path.exists(self.cloneDestination):
1423             os.makedirs(self.cloneDestination)
1424         os.chdir(self.cloneDestination)
1425         system("git init")
1426         self.gitdir = os.getcwd() + "/.git"
1427         if not P4Sync.run(self, depotPaths):
1428             return False
1429         if self.branch != "master":
1430             if gitBranchExists("refs/remotes/p4/master"):
1431                 system("git branch master refs/remotes/p4/master")
1432                 system("git checkout -f")
1433             else:
1434                 print "Could not detect main branch. No checkout/master branch created."
1435
1436         return True
1437
1438 class HelpFormatter(optparse.IndentedHelpFormatter):
1439     def __init__(self):
1440         optparse.IndentedHelpFormatter.__init__(self)
1441
1442     def format_description(self, description):
1443         if description:
1444             return description + "\n"
1445         else:
1446             return ""
1447
1448 def printUsage(commands):
1449     print "usage: %s <command> [options]" % sys.argv[0]
1450     print ""
1451     print "valid commands: %s" % ", ".join(commands)
1452     print ""
1453     print "Try %s <command> --help for command specific help." % sys.argv[0]
1454     print ""
1455
1456 commands = {
1457     "debug" : P4Debug,
1458     "submit" : P4Submit,
1459     "sync" : P4Sync,
1460     "rebase" : P4Rebase,
1461     "clone" : P4Clone,
1462     "rollback" : P4RollBack
1463 }
1464
1465
1466 def main():
1467     if len(sys.argv[1:]) == 0:
1468         printUsage(commands.keys())
1469         sys.exit(2)
1470
1471     cmd = ""
1472     cmdName = sys.argv[1]
1473     try:
1474         klass = commands[cmdName]
1475         cmd = klass()
1476     except KeyError:
1477         print "unknown command %s" % cmdName
1478         print ""
1479         printUsage(commands.keys())
1480         sys.exit(2)
1481
1482     options = cmd.options
1483     cmd.gitdir = os.environ.get("GIT_DIR", None)
1484
1485     args = sys.argv[2:]
1486
1487     if len(options) > 0:
1488         options.append(optparse.make_option("--git-dir", dest="gitdir"))
1489
1490         parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
1491                                        options,
1492                                        description = cmd.description,
1493                                        formatter = HelpFormatter())
1494
1495         (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
1496     global verbose
1497     verbose = cmd.verbose
1498     if cmd.needsGit:
1499         if cmd.gitdir == None:
1500             cmd.gitdir = os.path.abspath(".git")
1501             if not isValidGitDir(cmd.gitdir):
1502                 cmd.gitdir = read_pipe("git rev-parse --git-dir").strip()
1503                 if os.path.exists(cmd.gitdir):
1504                     cdup = read_pipe("git rev-parse --show-cdup").strip()
1505                     if len(cdup) > 0:
1506                         os.chdir(cdup);
1507
1508         if not isValidGitDir(cmd.gitdir):
1509             if isValidGitDir(cmd.gitdir + "/.git"):
1510                 cmd.gitdir += "/.git"
1511             else:
1512                 die("fatal: cannot locate git repository at %s" % cmd.gitdir)
1513
1514         os.environ["GIT_DIR"] = cmd.gitdir
1515
1516     if not cmd.run(args):
1517         parser.print_help()
1518
1519
1520 if __name__ == '__main__':
1521     main()