Andrew's git / gitweb.git / contrib/fast-import/git-p4
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contrib / fast-import / git-p4on commit Merge origin. (5e926ee)
   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
  11import optparse, sys, os, marshal, popen2, subprocess, shelve
  12import tempfile, getopt, sha, os.path, time, platform
  13import re
  14
  15from sets import Set;
  16
  17gitdir = os.environ.get("GIT_DIR", "")
  18verbose = False
  19
  20def write_pipe(c, str):
  21    if verbose:
  22        sys.stderr.write('writing pipe: %s\n' % c)
  23
  24    pipe = os.popen(c, 'w')
  25    val = pipe.write(str)
  26    if pipe.close():
  27        sys.stderr.write('Command failed: %s' % c)
  28        sys.exit(1)
  29
  30    return val
  31
  32def read_pipe(c, ignore_error=False):
  33    if verbose:
  34        sys.stderr.write('reading pipe: %s\n' % c)
  35
  36    pipe = os.popen(c, 'rb')
  37    val = pipe.read()
  38    if pipe.close() and not ignore_error:
  39        sys.stderr.write('Command failed: %s\n' % c)
  40        sys.exit(1)
  41
  42    return val
  43
  44
  45def read_pipe_lines(c):
  46    if verbose:
  47        sys.stderr.write('reading pipe: %s\n' % c)
  48    ## todo: check return status
  49    pipe = os.popen(c, 'rb')
  50    val = pipe.readlines()
  51    if pipe.close():
  52        sys.stderr.write('Command failed: %s\n' % c)
  53        sys.exit(1)
  54
  55    return val
  56
  57def system(cmd):
  58    if verbose:
  59        sys.stderr.write("executing %s\n" % cmd)
  60    if os.system(cmd) != 0:
  61        die("command failed: %s" % cmd)
  62
  63def p4CmdList(cmd):
  64    cmd = "p4 -G %s" % cmd
  65    pipe = os.popen(cmd, "rb")
  66
  67    result = []
  68    try:
  69        while True:
  70            entry = marshal.load(pipe)
  71            result.append(entry)
  72    except EOFError:
  73        pass
  74    exitCode = pipe.close()
  75    if exitCode != None:
  76        entry = {}
  77        entry["p4ExitCode"] = exitCode
  78        result.append(entry)
  79
  80    return result
  81
  82def p4Cmd(cmd):
  83    list = p4CmdList(cmd)
  84    result = {}
  85    for entry in list:
  86        result.update(entry)
  87    return result;
  88
  89def p4Where(depotPath):
  90    if not depotPath.endswith("/"):
  91        depotPath += "/"
  92    output = p4Cmd("where %s..." % depotPath)
  93    if output["code"] == "error":
  94        return ""
  95    clientPath = ""
  96    if "path" in output:
  97        clientPath = output.get("path")
  98    elif "data" in output:
  99        data = output.get("data")
 100        lastSpace = data.rfind(" ")
 101        clientPath = data[lastSpace + 1:]
 102
 103    if clientPath.endswith("..."):
 104        clientPath = clientPath[:-3]
 105    return clientPath
 106
 107def die(msg):
 108    sys.stderr.write(msg + "\n")
 109    sys.exit(1)
 110
 111def currentGitBranch():
 112    return read_pipe("git name-rev HEAD").split(" ")[1].strip()
 113
 114def isValidGitDir(path):
 115    if (os.path.exists(path + "/HEAD")
 116        and os.path.exists(path + "/refs") and os.path.exists(path + "/objects")):
 117        return True;
 118    return False
 119
 120def parseRevision(ref):
 121    return read_pipe("git rev-parse %s" % ref).strip()
 122
 123def extractLogMessageFromGitCommit(commit):
 124    logMessage = ""
 125
 126    ## fixme: title is first line of commit, not 1st paragraph.
 127    foundTitle = False
 128    for log in read_pipe_lines("git cat-file commit %s" % commit):
 129       if not foundTitle:
 130           if len(log) == 1:
 131               foundTitle = True
 132           continue
 133
 134       logMessage += log
 135    return logMessage
 136
 137def extractSettingsGitLog(log):
 138    values = {}
 139    for line in log.split("\n"):
 140        line = line.strip()
 141        m = re.search (r"^ *\[git-p4: (.*)\]$", line)
 142        if not m:
 143            continue
 144
 145        assignments = m.group(1).split (':')
 146        for a in assignments:
 147            vals = a.split ('=')
 148            key = vals[0].strip()
 149            val = ('='.join (vals[1:])).strip()
 150            if val.endswith ('\"') and val.startswith('"'):
 151                val = val[1:-1]
 152
 153            values[key] = val
 154
 155    values['depot-paths'] = values.get("depot-paths").split(',')
 156    return values
 157
 158def gitBranchExists(branch):
 159    proc = subprocess.Popen(["git", "rev-parse", branch],
 160                            stderr=subprocess.PIPE, stdout=subprocess.PIPE);
 161    return proc.wait() == 0;
 162
 163def gitConfig(key):
 164    return read_pipe("git config %s" % key, ignore_error=True).strip()
 165
 166class Command:
 167    def __init__(self):
 168        self.usage = "usage: %prog [options]"
 169        self.needsGit = True
 170
 171class P4Debug(Command):
 172    def __init__(self):
 173        Command.__init__(self)
 174        self.options = [
 175            optparse.make_option("--verbose", dest="verbose", action="store_true"),
 176            ]
 177        self.description = "A tool to debug the output of p4 -G."
 178        self.needsGit = False
 179
 180    def run(self, args):
 181        for output in p4CmdList(" ".join(args)):
 182            print output
 183        return True
 184
 185class P4RollBack(Command):
 186    def __init__(self):
 187        Command.__init__(self)
 188        self.options = [
 189            optparse.make_option("--verbose", dest="verbose", action="store_true"),
 190            optparse.make_option("--local", dest="rollbackLocalBranches", action="store_true")
 191        ]
 192        self.description = "A tool to debug the multi-branch import. Don't use :)"
 193        self.verbose = False
 194        self.rollbackLocalBranches = False
 195
 196    def run(self, args):
 197        if len(args) != 1:
 198            return False
 199        maxChange = int(args[0])
 200
 201        if "p4ExitCode" in p4Cmd("changes -m 1"):
 202            die("Problems executing p4");
 203
 204        if self.rollbackLocalBranches:
 205            refPrefix = "refs/heads/"
 206            lines = read_pipe_lines("git rev-parse --symbolic --branches")
 207        else:
 208            refPrefix = "refs/remotes/"
 209            lines = read_pipe_lines("git rev-parse --symbolic --remotes")
 210
 211        for line in lines:
 212            if self.rollbackLocalBranches or (line.startswith("p4/") and line != "p4/HEAD\n"):
 213                line = line.strip()
 214                ref = refPrefix + line
 215                log = extractLogMessageFromGitCommit(ref)
 216                settings = extractSettingsGitLog(log)
 217
 218                depotPaths = settings['depot-paths']
 219                change = settings['change']
 220
 221                changed = False
 222
 223                if len(p4Cmd("changes -m 1 "  + ' '.join (['%s...@%s' % (p, maxChange)
 224                                                           for p in depotPaths]))) == 0:
 225                    print "Branch %s did not exist at change %s, deleting." % (ref, maxChange)
 226                    system("git update-ref -d %s `git rev-parse %s`" % (ref, ref))
 227                    continue
 228
 229                while change and int(change) > maxChange:
 230                    changed = True
 231                    if self.verbose:
 232                        print "%s is at %s ; rewinding towards %s" % (ref, change, maxChange)
 233                    system("git update-ref %s \"%s^\"" % (ref, ref))
 234                    log = extractLogMessageFromGitCommit(ref)
 235                    settings =  extractSettingsGitLog(log)
 236
 237
 238                    depotPaths = settings['depot-paths']
 239                    change = settings['change']
 240
 241                if changed:
 242                    print "%s rewound to %s" % (ref, change)
 243
 244        return True
 245
 246class P4Submit(Command):
 247    def __init__(self):
 248        Command.__init__(self)
 249        self.options = [
 250                optparse.make_option("--continue", action="store_false", dest="firstTime"),
 251                optparse.make_option("--verbose", dest="verbose", action="store_true"),
 252                optparse.make_option("--origin", dest="origin"),
 253                optparse.make_option("--reset", action="store_true", dest="reset"),
 254                optparse.make_option("--log-substitutions", dest="substFile"),
 255                optparse.make_option("--dry-run", action="store_true"),
 256                optparse.make_option("--direct", dest="directSubmit", action="store_true"),
 257                optparse.make_option("--trust-me-like-a-fool", dest="trustMeLikeAFool", action="store_true"),
 258        ]
 259        self.description = "Submit changes from git to the perforce depot."
 260        self.usage += " [name of git branch to submit into perforce depot]"
 261        self.firstTime = True
 262        self.reset = False
 263        self.interactive = True
 264        self.dryRun = False
 265        self.substFile = ""
 266        self.firstTime = True
 267        self.origin = ""
 268        self.directSubmit = False
 269        self.trustMeLikeAFool = False
 270
 271        self.logSubstitutions = {}
 272        self.logSubstitutions["<enter description here>"] = "%log%"
 273        self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
 274
 275    def check(self):
 276        if len(p4CmdList("opened ...")) > 0:
 277            die("You have files opened with perforce! Close them before starting the sync.")
 278
 279    def start(self):
 280        if len(self.config) > 0 and not self.reset:
 281            die("Cannot start sync. Previous sync config found at %s\n"
 282                "If you want to start submitting again from scratch "
 283                "maybe you want to call git-p4 submit --reset" % self.configFile)
 284
 285        commits = []
 286        if self.directSubmit:
 287            commits.append("0")
 288        else:
 289            for line in read_pipe_lines("git rev-list --no-merges %s..%s" % (self.origin, self.master)):
 290                commits.append(line.strip())
 291            commits.reverse()
 292
 293        self.config["commits"] = commits
 294
 295    def prepareLogMessage(self, template, message):
 296        result = ""
 297
 298        for line in template.split("\n"):
 299            if line.startswith("#"):
 300                result += line + "\n"
 301                continue
 302
 303            substituted = False
 304            for key in self.logSubstitutions.keys():
 305                if line.find(key) != -1:
 306                    value = self.logSubstitutions[key]
 307                    value = value.replace("%log%", message)
 308                    if value != "@remove@":
 309                        result += line.replace(key, value) + "\n"
 310                    substituted = True
 311                    break
 312
 313            if not substituted:
 314                result += line + "\n"
 315
 316        return result
 317
 318    def applyCommit(self, id):
 319        if self.directSubmit:
 320            print "Applying local change in working directory/index"
 321            diff = self.diffStatus
 322        else:
 323            print "Applying %s" % (read_pipe("git log --max-count=1 --pretty=oneline %s" % id))
 324            diff = read_pipe_lines("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id))
 325        filesToAdd = set()
 326        filesToDelete = set()
 327        editedFiles = set()
 328        for line in diff:
 329            modifier = line[0]
 330            path = line[1:].strip()
 331            if modifier == "M":
 332                system("p4 edit \"%s\"" % path)
 333                editedFiles.add(path)
 334            elif modifier == "A":
 335                filesToAdd.add(path)
 336                if path in filesToDelete:
 337                    filesToDelete.remove(path)
 338            elif modifier == "D":
 339                filesToDelete.add(path)
 340                if path in filesToAdd:
 341                    filesToAdd.remove(path)
 342            else:
 343                die("unknown modifier %s for %s" % (modifier, path))
 344
 345        if self.directSubmit:
 346            diffcmd = "cat \"%s\"" % self.diffFile
 347        else:
 348            diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
 349        patchcmd = diffcmd + " | git apply "
 350        tryPatchCmd = patchcmd + "--check -"
 351        applyPatchCmd = patchcmd + "--check --apply -"
 352
 353        if os.system(tryPatchCmd) != 0:
 354            print "Unfortunately applying the change failed!"
 355            print "What do you want to do?"
 356            response = "x"
 357            while response != "s" and response != "a" and response != "w":
 358                response = raw_input("[s]kip this patch / [a]pply the patch forcibly "
 359                                     "and with .rej files / [w]rite the patch to a file (patch.txt) ")
 360            if response == "s":
 361                print "Skipping! Good luck with the next patches..."
 362                return
 363            elif response == "a":
 364                os.system(applyPatchCmd)
 365                if len(filesToAdd) > 0:
 366                    print "You may also want to call p4 add on the following files:"
 367                    print " ".join(filesToAdd)
 368                if len(filesToDelete):
 369                    print "The following files should be scheduled for deletion with p4 delete:"
 370                    print " ".join(filesToDelete)
 371                die("Please resolve and submit the conflict manually and "
 372                    + "continue afterwards with git-p4 submit --continue")
 373            elif response == "w":
 374                system(diffcmd + " > patch.txt")
 375                print "Patch saved to patch.txt in %s !" % self.clientPath
 376                die("Please resolve and submit the conflict manually and "
 377                    "continue afterwards with git-p4 submit --continue")
 378
 379        system(applyPatchCmd)
 380
 381        for f in filesToAdd:
 382            system("p4 add %s" % f)
 383        for f in filesToDelete:
 384            system("p4 revert %s" % f)
 385            system("p4 delete %s" % f)
 386
 387        logMessage = ""
 388        if not self.directSubmit:
 389            logMessage = extractLogMessageFromGitCommit(id)
 390            logMessage = logMessage.replace("\n", "\n\t")
 391            logMessage = logMessage.strip()
 392
 393        template = read_pipe("p4 change -o")
 394
 395        if self.interactive:
 396            submitTemplate = self.prepareLogMessage(template, logMessage)
 397            diff = read_pipe("p4 diff -du ...")
 398
 399            for newFile in filesToAdd:
 400                diff += "==== new file ====\n"
 401                diff += "--- /dev/null\n"
 402                diff += "+++ %s\n" % newFile
 403                f = open(newFile, "r")
 404                for line in f.readlines():
 405                    diff += "+" + line
 406                f.close()
 407
 408            separatorLine = "######## everything below this line is just the diff #######"
 409            if platform.system() == "Windows":
 410                separatorLine += "\r"
 411            separatorLine += "\n"
 412
 413            response = "e"
 414            if self.trustMeLikeAFool:
 415                response = "y"
 416
 417            firstIteration = True
 418            while response == "e":
 419                if not firstIteration:
 420                    response = raw_input("Do you want to submit this change? [y]es/[e]dit/[n]o/[s]kip ")
 421                firstIteration = False
 422                if response == "e":
 423                    [handle, fileName] = tempfile.mkstemp()
 424                    tmpFile = os.fdopen(handle, "w+")
 425                    tmpFile.write(submitTemplate + separatorLine + diff)
 426                    tmpFile.close()
 427                    defaultEditor = "vi"
 428                    if platform.system() == "Windows":
 429                        defaultEditor = "notepad"
 430                    editor = os.environ.get("EDITOR", defaultEditor);
 431                    system(editor + " " + fileName)
 432                    tmpFile = open(fileName, "rb")
 433                    message = tmpFile.read()
 434                    tmpFile.close()
 435                    os.remove(fileName)
 436                    submitTemplate = message[:message.index(separatorLine)]
 437
 438            if response == "y" or response == "yes":
 439               if self.dryRun:
 440                   print submitTemplate
 441                   raw_input("Press return to continue...")
 442               else:
 443                   if self.directSubmit:
 444                       print "Submitting to git first"
 445                       os.chdir(self.oldWorkingDirectory)
 446                       write_pipe("git commit -a -F -", submitTemplate)
 447                       os.chdir(self.clientPath)
 448
 449                   write_pipe("p4 submit -i", submitTemplate)
 450            elif response == "s":
 451                for f in editedFiles:
 452                    system("p4 revert \"%s\"" % f);
 453                for f in filesToAdd:
 454                    system("p4 revert \"%s\"" % f);
 455                    system("rm %s" %f)
 456                for f in filesToDelete:
 457                    system("p4 delete \"%s\"" % f);
 458                return
 459            else:
 460                print "Not submitting!"
 461                self.interactive = False
 462        else:
 463            fileName = "submit.txt"
 464            file = open(fileName, "w+")
 465            file.write(self.prepareLogMessage(template, logMessage))
 466            file.close()
 467            print ("Perforce submit template written as %s. "
 468                   + "Please review/edit and then use p4 submit -i < %s to submit directly!"
 469                   % (fileName, fileName))
 470
 471    def run(self, args):
 472        global gitdir
 473        # make gitdir absolute so we can cd out into the perforce checkout
 474        gitdir = os.path.abspath(gitdir)
 475        os.environ["GIT_DIR"] = gitdir
 476
 477        if len(args) == 0:
 478            self.master = currentGitBranch()
 479            if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
 480                die("Detecting current git branch failed!")
 481        elif len(args) == 1:
 482            self.master = args[0]
 483        else:
 484            return False
 485
 486        depotPath = ""
 487        settings = None
 488        if gitBranchExists("p4"):
 489            settings = extractSettingsGitLog(extractLogMessageFromGitCommit("p4"))
 490        if len(depotPath) == 0 and gitBranchExists("origin"):
 491            settings = extractSettingsGitLog(extractLogMessageFromGitCommit("origin"))
 492        depotPaths = settings['depot-paths']
 493
 494        if len(depotPath) == 0:
 495            print "Internal error: cannot locate perforce depot path from existing branches"
 496            sys.exit(128)
 497
 498        self.clientPath = p4Where(depotPath)
 499
 500        if len(self.clientPath) == 0:
 501            print "Error: Cannot locate perforce checkout of %s in client view" % depotPath
 502            sys.exit(128)
 503
 504        print "Perforce checkout for depot path %s located at %s" % (depotPath, self.clientPath)
 505        self.oldWorkingDirectory = os.getcwd()
 506
 507        if self.directSubmit:
 508            self.diffStatus = read_pipe_lines("git diff -r --name-status HEAD")
 509            if len(self.diffStatus) == 0:
 510                print "No changes in working directory to submit."
 511                return True
 512            patch = read_pipe("git diff -p --binary --diff-filter=ACMRTUXB HEAD")
 513            self.diffFile = gitdir + "/p4-git-diff"
 514            f = open(self.diffFile, "wb")
 515            f.write(patch)
 516            f.close();
 517
 518        os.chdir(self.clientPath)
 519        response = raw_input("Do you want to sync %s with p4 sync? [y]es/[n]o " % self.clientPath)
 520        if response == "y" or response == "yes":
 521            system("p4 sync ...")
 522
 523        if len(self.origin) == 0:
 524            if gitBranchExists("p4"):
 525                self.origin = "p4"
 526            else:
 527                self.origin = "origin"
 528
 529        if self.reset:
 530            self.firstTime = True
 531
 532        if len(self.substFile) > 0:
 533            for line in open(self.substFile, "r").readlines():
 534                tokens = line.strip().split("=")
 535                self.logSubstitutions[tokens[0]] = tokens[1]
 536
 537        self.check()
 538        self.configFile = gitdir + "/p4-git-sync.cfg"
 539        self.config = shelve.open(self.configFile, writeback=True)
 540
 541        if self.firstTime:
 542            self.start()
 543
 544        commits = self.config.get("commits", [])
 545
 546        while len(commits) > 0:
 547            self.firstTime = False
 548            commit = commits[0]
 549            commits = commits[1:]
 550            self.config["commits"] = commits
 551            self.applyCommit(commit)
 552            if not self.interactive:
 553                break
 554
 555        self.config.close()
 556
 557        if self.directSubmit:
 558            os.remove(self.diffFile)
 559
 560        if len(commits) == 0:
 561            if self.firstTime:
 562                print "No changes found to apply between %s and current HEAD" % self.origin
 563            else:
 564                print "All changes applied!"
 565                os.chdir(self.oldWorkingDirectory)
 566                response = raw_input("Do you want to sync from Perforce now using git-p4 rebase? [y]es/[n]o ")
 567                if response == "y" or response == "yes":
 568                    rebase = P4Rebase()
 569                    rebase.run([])
 570            os.remove(self.configFile)
 571
 572        return True
 573
 574class P4Sync(Command):
 575    def __init__(self):
 576        Command.__init__(self)
 577        self.options = [
 578                optparse.make_option("--branch", dest="branch"),
 579                optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
 580                optparse.make_option("--changesfile", dest="changesFile"),
 581                optparse.make_option("--silent", dest="silent", action="store_true"),
 582                optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
 583                optparse.make_option("--verbose", dest="verbose", action="store_true"),
 584                optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false"),
 585                optparse.make_option("--max-changes", dest="maxChanges"),
 586                optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true')
 587        ]
 588        self.description = """Imports from Perforce into a git repository.\n
 589    example:
 590    //depot/my/project/ -- to import the current head
 591    //depot/my/project/@all -- to import everything
 592    //depot/my/project/@1,6 -- to import only from revision 1 to 6
 593
 594    (a ... is not needed in the path p4 specification, it's added implicitly)"""
 595
 596        self.usage += " //depot/path[@revRange]"
 597        self.silent = False
 598        self.createdBranches = Set()
 599        self.committedChanges = Set()
 600        self.branch = ""
 601        self.detectBranches = False
 602        self.detectLabels = False
 603        self.changesFile = ""
 604        self.syncWithOrigin = True
 605        self.verbose = False
 606        self.importIntoRemotes = True
 607        self.maxChanges = ""
 608        self.isWindows = (platform.system() == "Windows")
 609        self.keepRepoPath = False
 610        self.depotPaths = None
 611
 612        if gitConfig("git-p4.syncFromOrigin") == "false":
 613            self.syncWithOrigin = False
 614
 615    def p4File(self, depotPath):
 616        return read_pipe("p4 print -q \"%s\"" % depotPath)
 617
 618    def extractFilesFromCommit(self, commit):
 619        files = []
 620        fnum = 0
 621        while commit.has_key("depotFile%s" % fnum):
 622            path =  commit["depotFile%s" % fnum]
 623
 624            found = [p for p in self.depotPaths
 625                     if path.startswith (p)]
 626            if not found:
 627                fnum = fnum + 1
 628                continue
 629
 630            file = {}
 631            file["path"] = path
 632            file["rev"] = commit["rev%s" % fnum]
 633            file["action"] = commit["action%s" % fnum]
 634            file["type"] = commit["type%s" % fnum]
 635            files.append(file)
 636            fnum = fnum + 1
 637        return files
 638
 639    def stripRepoPath(self, path, prefixes):
 640        if self.keepRepoPath:
 641            prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
 642
 643        for p in prefixes:
 644            if path.startswith(p):
 645                path = path[len(p):]
 646
 647        return path
 648
 649    def splitFilesIntoBranches(self, commit):
 650        branches = {}
 651        fnum = 0
 652        while commit.has_key("depotFile%s" % fnum):
 653            path =  commit["depotFile%s" % fnum]
 654            found = [p for p in self.depotPaths
 655                     if path.startswith (p)]
 656            if not found:
 657                fnum = fnum + 1
 658                continue
 659
 660            file = {}
 661            file["path"] = path
 662            file["rev"] = commit["rev%s" % fnum]
 663            file["action"] = commit["action%s" % fnum]
 664            file["type"] = commit["type%s" % fnum]
 665            fnum = fnum + 1
 666
 667            relPath = self.stripRepoPath(path, self.depotPaths)
 668
 669            for branch in self.knownBranches.keys():
 670
 671                # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
 672                if relPath.startswith(branch + "/"):
 673                    if branch not in branches:
 674                        branches[branch] = []
 675                    branches[branch].append(file)
 676
 677        return branches
 678
 679    def commit(self, details, files, branch, branchPrefixes, parent = ""):
 680        epoch = details["time"]
 681        author = details["user"]
 682
 683        if self.verbose:
 684            print "commit into %s" % branch
 685
 686        self.gitStream.write("commit %s\n" % branch)
 687    #    gitStream.write("mark :%s\n" % details["change"])
 688        self.committedChanges.add(int(details["change"]))
 689        committer = ""
 690        if author not in self.users:
 691            self.getUserMapFromPerforceServer()
 692        if author in self.users:
 693            committer = "%s %s %s" % (self.users[author], epoch, self.tz)
 694        else:
 695            committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
 696
 697        self.gitStream.write("committer %s\n" % committer)
 698
 699        self.gitStream.write("data <<EOT\n")
 700        self.gitStream.write(details["desc"])
 701        self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s: "
 702                             "options = %s]\n"
 703                             % (','.join (branchPrefixes), details["change"],
 704                                details['options']
 705                                ))
 706        self.gitStream.write("EOT\n\n")
 707
 708        if len(parent) > 0:
 709            if self.verbose:
 710                print "parent %s" % parent
 711            self.gitStream.write("from %s\n" % parent)
 712
 713        for file in files:
 714            path = file["path"]
 715
 716
 717            if not [p for p in branchPrefixes if path.startswith(p)]:
 718                continue
 719            rev = file["rev"]
 720            depotPath = path + "#" + rev
 721            relPath = self.stripRepoPath(path, branchPrefixes)
 722            action = file["action"]
 723
 724            if file["type"] == "apple":
 725                print "\nfile %s is a strange apple file that forks. Ignoring!" % path
 726                continue
 727
 728            if action == "delete":
 729                self.gitStream.write("D %s\n" % relPath)
 730            else:
 731                mode = 644
 732                if file["type"].startswith("x"):
 733                    mode = 755
 734
 735                data = self.p4File(depotPath)
 736
 737                if self.isWindows and file["type"].endswith("text"):
 738                    data = data.replace("\r\n", "\n")
 739
 740                self.gitStream.write("M %s inline %s\n" % (mode, relPath))
 741                self.gitStream.write("data %s\n" % len(data))
 742                self.gitStream.write(data)
 743                self.gitStream.write("\n")
 744
 745        self.gitStream.write("\n")
 746
 747        change = int(details["change"])
 748
 749        if self.labels.has_key(change):
 750            label = self.labels[change]
 751            labelDetails = label[0]
 752            labelRevisions = label[1]
 753            if self.verbose:
 754                print "Change %s is labelled %s" % (change, labelDetails)
 755
 756            files = p4CmdList("files " + ' '.join (["%s...@%s" % (p, change)
 757                                                    for p in branchPrefixes]))
 758
 759            if len(files) == len(labelRevisions):
 760
 761                cleanedFiles = {}
 762                for info in files:
 763                    if info["action"] == "delete":
 764                        continue
 765                    cleanedFiles[info["depotFile"]] = info["rev"]
 766
 767                if cleanedFiles == labelRevisions:
 768                    self.gitStream.write("tag tag_%s\n" % labelDetails["label"])
 769                    self.gitStream.write("from %s\n" % branch)
 770
 771                    owner = labelDetails["Owner"]
 772                    tagger = ""
 773                    if author in self.users:
 774                        tagger = "%s %s %s" % (self.users[owner], epoch, self.tz)
 775                    else:
 776                        tagger = "%s <a@b> %s %s" % (owner, epoch, self.tz)
 777                    self.gitStream.write("tagger %s\n" % tagger)
 778                    self.gitStream.write("data <<EOT\n")
 779                    self.gitStream.write(labelDetails["Description"])
 780                    self.gitStream.write("EOT\n\n")
 781
 782                else:
 783                    if not self.silent:
 784                        print ("Tag %s does not match with change %s: files do not match."
 785                               % (labelDetails["label"], change))
 786
 787            else:
 788                if not self.silent:
 789                    print ("Tag %s does not match with change %s: file count is different."
 790                           % (labelDetails["label"], change))
 791
 792    def getUserMapFromPerforceServer(self):
 793        if self.userMapFromPerforceServer:
 794            return
 795        self.users = {}
 796
 797        for output in p4CmdList("users"):
 798            if not output.has_key("User"):
 799                continue
 800            self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 801
 802        cache = open(gitdir + "/p4-usercache.txt", "wb")
 803        for user in self.users.keys():
 804            cache.write("%s\t%s\n" % (user, self.users[user]))
 805        cache.close();
 806        self.userMapFromPerforceServer = True
 807
 808    def loadUserMapFromCache(self):
 809        self.users = {}
 810        self.userMapFromPerforceServer = False
 811        try:
 812            cache = open(gitdir + "/p4-usercache.txt", "rb")
 813            lines = cache.readlines()
 814            cache.close()
 815            for line in lines:
 816                entry = line.strip().split("\t")
 817                self.users[entry[0]] = entry[1]
 818        except IOError:
 819            self.getUserMapFromPerforceServer()
 820
 821    def getLabels(self):
 822        self.labels = {}
 823
 824        l = p4CmdList("labels %s..." % ' '.join (self.depotPaths))
 825        if len(l) > 0 and not self.silent:
 826            print "Finding files belonging to labels in %s" % `self.depotPath`
 827
 828        for output in l:
 829            label = output["label"]
 830            revisions = {}
 831            newestChange = 0
 832            if self.verbose:
 833                print "Querying files for label %s" % label
 834            for file in p4CmdList("files "
 835                                  +  ' '.join (["%s...@%s" % (p, label)
 836                                                for p in self.depotPaths])):
 837                revisions[file["depotFile"]] = file["rev"]
 838                change = int(file["change"])
 839                if change > newestChange:
 840                    newestChange = change
 841
 842            self.labels[newestChange] = [output, revisions]
 843
 844        if self.verbose:
 845            print "Label changes: %s" % self.labels.keys()
 846
 847    def getBranchMapping(self):
 848
 849        ## FIXME - what's a P4 projectName ?
 850        self.projectName = self.depotPath[self.depotPath.strip().rfind("/") + 1:]
 851
 852        for info in p4CmdList("branches"):
 853            details = p4Cmd("branch -o %s" % info["branch"])
 854            viewIdx = 0
 855            while details.has_key("View%s" % viewIdx):
 856                paths = details["View%s" % viewIdx].split(" ")
 857                viewIdx = viewIdx + 1
 858                # require standard //depot/foo/... //depot/bar/... mapping
 859                if len(paths) != 2 or not paths[0].endswith("/...") or not paths[1].endswith("/..."):
 860                    continue
 861                source = paths[0]
 862                destination = paths[1]
 863                if source.startswith(self.depotPath) and destination.startswith(self.depotPath):
 864                    source = source[len(self.depotPath):-4]
 865                    destination = destination[len(self.depotPath):-4]
 866                    if destination not in self.knownBranches:
 867                        self.knownBranches[destination] = source
 868                    if source not in self.knownBranches:
 869                        self.knownBranches[source] = source
 870
 871    def listExistingP4GitBranches(self):
 872        self.p4BranchesInGit = []
 873
 874        cmdline = "git rev-parse --symbolic "
 875        if self.importIntoRemotes:
 876            cmdline += " --remotes"
 877        else:
 878            cmdline += " --branches"
 879
 880        for line in read_pipe_lines(cmdline):
 881            line = line.strip()
 882            if self.importIntoRemotes and ((not line.startswith("p4/")) or line == "p4/HEAD"):
 883                continue
 884
 885            if self.importIntoRemotes:
 886                # strip off p4
 887                branch = re.sub ("^p4/", "", line)
 888
 889            self.p4BranchesInGit.append(branch)
 890            self.initialParents[self.refPrefix + branch] = parseRevision(line)
 891
 892    def createOrUpdateBranchesFromOrigin(self):
 893        if not self.silent:
 894            print "Creating/updating branch(es) in %s based on origin branch(es)" % self.refPrefix
 895
 896        for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
 897            line = line.strip()
 898            if (not line.startswith("origin/")) or line.endswith("HEAD\n"):
 899                continue
 900
 901            headName = line[len("origin/"):]
 902            remoteHead = self.refPrefix + headName
 903            originHead = "origin/" + headName
 904
 905            original = extractSettingsGitLog(extractLogMessageFromGitCommit(originHead))
 906            if (not original.has_key('depot-paths')
 907                or not original.has_key('change')):
 908                continue
 909
 910            update = False
 911            if not gitBranchExists(remoteHead):
 912                if self.verbose:
 913                    print "creating %s" % remoteHead
 914                update = True
 915            else:
 916                settings =  extractSettingsGitLog(extractLogMessageFromGitCommit(remoteHead))
 917                if settings.has_key('change') > 0:
 918                    if settings['depot-paths'] == original['depot-paths']:
 919                        originP4Change = int(original['change'])
 920                        p4Change = int(settings['change'])
 921                        if originP4Change > p4Change:
 922                            print ("%s (%s) is newer than %s (%s). "
 923                                   "Updating p4 branch from origin."
 924                                   % (originHead, originP4Change,
 925                                      remoteHead, p4Change))
 926                            update = True
 927                    else:
 928                        print ("Ignoring: %s was imported from %s while "
 929                               "%s was imported from %s"
 930                               % (originHead, ','.join(original['depot-paths']),
 931                                  remoteHead, ','.join(settings['depot-paths'])))
 932
 933            if update:
 934                system("git update-ref %s %s" % (remoteHead, originHead))
 935
 936    def updateOptionDict(self, d):
 937        option_keys = {}
 938        if self.keepRepoPath:
 939            option_keys['keepRepoPath'] = 1
 940
 941        d["options"] = ' '.join(sorted(option_keys.keys()))
 942
 943    def readOptions(self, d):
 944        self.keepRepoPath = (d.has_key('options')
 945                             and ('keepRepoPath' in d['options']))
 946
 947    def run(self, args):
 948        self.depotPaths = []
 949        self.changeRange = ""
 950        self.initialParent = ""
 951        self.previousDepotPaths = []
 952
 953        # map from branch depot path to parent branch
 954        self.knownBranches = {}
 955        self.initialParents = {}
 956        self.hasOrigin = gitBranchExists("origin")
 957
 958        if self.importIntoRemotes:
 959            self.refPrefix = "refs/remotes/p4/"
 960        else:
 961            self.refPrefix = "refs/heads/"
 962
 963        if self.syncWithOrigin and self.hasOrigin:
 964            if not self.silent:
 965                print "Syncing with origin first by calling git fetch origin"
 966            system("git fetch origin")
 967
 968        if len(self.branch) == 0:
 969            self.branch = self.refPrefix + "master"
 970            if gitBranchExists("refs/heads/p4") and self.importIntoRemotes:
 971                system("git update-ref %s refs/heads/p4" % self.branch)
 972                system("git branch -D p4");
 973            # create it /after/ importing, when master exists
 974            if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes:
 975                system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
 976
 977        ### FIXME
 978        if 1:
 979            if self.hasOrigin:
 980                self.createOrUpdateBranchesFromOrigin()
 981            self.listExistingP4GitBranches()
 982
 983            if len(self.p4BranchesInGit) > 1:
 984                if not self.silent:
 985                    print "Importing from/into multiple branches"
 986                self.detectBranches = True
 987
 988            if self.verbose:
 989                print "branches: %s" % self.p4BranchesInGit
 990
 991            p4Change = 0
 992            for branch in self.p4BranchesInGit:
 993                logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
 994
 995                settings = extractSettingsGitLog(logMsg)
 996
 997                if self.verbose:
 998                    print "path %s change %s" % (','.join(depotPaths), change)
 999
1000                self.readOptions(settings)
1001                if (settings.has_key('depot-paths')
1002                    and settings.has_key ('change')):
1003                    change = int(settings['change']) + 1
1004                    p4Change = max(p4Change, change)
1005
1006                    depotPaths = sorted(settings['depot-paths'])
1007                    if self.previousDepotPaths == []:
1008                        self.previousDepotPaths = depotPaths
1009                    else:
1010                        paths = []
1011                        for (prev, cur) in zip(self.previousDepotPaths, depotPaths):
1012                            for i in range(0, max(len(cur), len(prev))):
1013                                if cur[i] <> prev[i]:
1014                                    break
1015
1016                            paths.append (cur[:i])
1017
1018                        self.previousDepotPaths = paths
1019
1020            if p4Change > 0:
1021                self.depotPaths = sorted(self.previousDepotPaths)
1022                self.changeRange = "@%s,#head" % p4Change
1023                self.initialParent = parseRevision(self.branch)
1024                if not self.silent and not self.detectBranches:
1025                    print "Performing incremental import into %s git branch" % self.branch
1026
1027        if not self.branch.startswith("refs/"):
1028            self.branch = "refs/heads/" + self.branch
1029
1030        if len(args) == 0 and self.depotPaths:
1031            if not self.silent:
1032                print "Depot paths: %s" % ' '.join(self.depotPaths)
1033        else:
1034            if self.depotPaths and self.depotPaths != args:
1035                print ("previous import used depot path %s and now %s was specified. "
1036                       "This doesn't work!" % (' '.join (self.depotPaths),
1037                                               ' '.join (args)))
1038                sys.exit(1)
1039
1040            self.depotPaths = sorted(args)
1041
1042        self.revision = ""
1043        self.users = {}
1044
1045        newPaths = []
1046        for p in self.depotPaths:
1047            if p.find("@") != -1:
1048                atIdx = p.index("@")
1049                self.changeRange = p[atIdx:]
1050                if self.changeRange == "@all":
1051                    self.changeRange = ""
1052                elif self.changeRange.find(",") == -1:
1053                    self.revision = self.changeRange
1054                    self.changeRange = ""
1055                p = p[0:atIdx]
1056            elif p.find("#") != -1:
1057                hashIdx = p.index("#")
1058                self.revision = p[hashIdx:]
1059                p = p[0:hashIdx]
1060            elif self.previousDepotPaths == []:
1061                self.revision = "#head"
1062
1063            p = re.sub ("\.\.\.$", "", p)
1064            if not p.endswith("/"):
1065                p += "/"
1066
1067            newPaths.append(p)
1068
1069        self.depotPaths = newPaths
1070
1071
1072        self.loadUserMapFromCache()
1073        self.labels = {}
1074        if self.detectLabels:
1075            self.getLabels();
1076
1077        if self.detectBranches:
1078            self.getBranchMapping();
1079            if self.verbose:
1080                print "p4-git branches: %s" % self.p4BranchesInGit
1081                print "initial parents: %s" % self.initialParents
1082            for b in self.p4BranchesInGit:
1083                if b != "master":
1084
1085                    ## FIXME
1086                    b = b[len(self.projectName):]
1087                self.createdBranches.add(b)
1088
1089        self.tz = "%+03d%02d" % (- time.timezone / 3600, ((- time.timezone % 3600) / 60))
1090
1091        importProcess = subprocess.Popen(["git", "fast-import"],
1092                                         stdin=subprocess.PIPE, stdout=subprocess.PIPE,
1093                                         stderr=subprocess.PIPE);
1094        self.gitOutput = importProcess.stdout
1095        self.gitStream = importProcess.stdin
1096        self.gitError = importProcess.stderr
1097
1098        if len(self.revision) > 0:
1099            print "Doing initial import of %s from revision %s" % (' '.join(self.depotPaths), self.revision)
1100
1101            details = { "user" : "git perforce import user", "time" : int(time.time()) }
1102            details["desc"] = ("Initial import of %s from the state at revision %s"
1103                               % (' '.join(self.depotPaths), self.revision))
1104            details["change"] = self.revision
1105            newestRevision = 0
1106
1107            fileCnt = 0
1108            for info in p4CmdList("files "
1109                                  +  ' '.join(["%s...%s"
1110                                               % (p, self.revision)
1111                                               for p in self.depotPaths])):
1112                change = int(info["change"])
1113                if change > newestRevision:
1114                    newestRevision = change
1115
1116                if info["action"] == "delete":
1117                    # don't increase the file cnt, otherwise details["depotFile123"] will have gaps!
1118                    #fileCnt = fileCnt + 1
1119                    continue
1120
1121                for prop in [ "depotFile", "rev", "action", "type" ]:
1122                    details["%s%s" % (prop, fileCnt)] = info[prop]
1123
1124                fileCnt = fileCnt + 1
1125
1126            details["change"] = newestRevision
1127            self.updateOptionDict(details)
1128            try:
1129                self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
1130            except IOError:
1131                print "IO error with git fast-import. Is your git version recent enough?"
1132                print self.gitError.read()
1133
1134        else:
1135            changes = []
1136
1137            if len(self.changesFile) > 0:
1138                output = open(self.changesFile).readlines()
1139                changeSet = Set()
1140                for line in output:
1141                    changeSet.add(int(line))
1142
1143                for change in changeSet:
1144                    changes.append(change)
1145
1146                changes.sort()
1147            else:
1148                if self.verbose:
1149                    print "Getting p4 changes for %s...%s" % (`self.depotPaths`,
1150                                                              self.changeRange)
1151                assert self.depotPaths
1152                output = read_pipe_lines("p4 changes " + ' '.join (["%s...%s" % (p, self.changeRange)
1153                                                                    for p in self.depotPaths]))
1154
1155                for line in output:
1156                    changeNum = line.split(" ")[1]
1157                    changes.append(changeNum)
1158
1159                changes.reverse()
1160
1161                if len(self.maxChanges) > 0:
1162                    changes = changes[0:min(int(self.maxChanges), len(changes))]
1163
1164            if len(changes) == 0:
1165                if not self.silent:
1166                    print "No changes to import!"
1167                return True
1168
1169            self.updatedBranches = set()
1170
1171            cnt = 1
1172            for change in changes:
1173                description = p4Cmd("describe %s" % change)
1174                self.updateOptionDict(description)
1175
1176                if not self.silent:
1177                    sys.stdout.write("\rImporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
1178                    sys.stdout.flush()
1179                cnt = cnt + 1
1180
1181                try:
1182                    if self.detectBranches:
1183                        branches = self.splitFilesIntoBranches(description)
1184                        for branch in branches.keys():
1185                            ## HACK  --hwn
1186                            branchPrefix = self.depotPaths[0] + branch + "/"
1187
1188                            parent = ""
1189
1190                            filesForCommit = branches[branch]
1191
1192                            if self.verbose:
1193                                print "branch is %s" % branch
1194
1195                            self.updatedBranches.add(branch)
1196
1197                            if branch not in self.createdBranches:
1198                                self.createdBranches.add(branch)
1199                                parent = self.knownBranches[branch]
1200                                if parent == branch:
1201                                    parent = ""
1202                                elif self.verbose:
1203                                    print "parent determined through known branches: %s" % parent
1204
1205                            # main branch? use master
1206                            if branch == "main":
1207                                branch = "master"
1208                            else:
1209
1210                                ## FIXME
1211                                branch = self.projectName + branch
1212
1213                            if parent == "main":
1214                                parent = "master"
1215                            elif len(parent) > 0:
1216                                ## FIXME
1217                                parent = self.projectName + parent
1218
1219                            branch = self.refPrefix + branch
1220                            if len(parent) > 0:
1221                                parent = self.refPrefix + parent
1222
1223                            if self.verbose:
1224                                print "looking for initial parent for %s; current parent is %s" % (branch, parent)
1225
1226                            if len(parent) == 0 and branch in self.initialParents:
1227                                parent = self.initialParents[branch]
1228                                del self.initialParents[branch]
1229
1230                            self.commit(description, filesForCommit, branch, branchPrefix, parent)
1231                    else:
1232                        files = self.extractFilesFromCommit(description)
1233                        self.commit(description, files, self.branch, self.depotPaths,
1234                                    self.initialParent)
1235                        self.initialParent = ""
1236                except IOError:
1237                    print self.gitError.read()
1238                    sys.exit(1)
1239
1240            if not self.silent:
1241                print ""
1242                if len(self.updatedBranches) > 0:
1243                    sys.stdout.write("Updated branches: ")
1244                    for b in self.updatedBranches:
1245                        sys.stdout.write("%s " % b)
1246                    sys.stdout.write("\n")
1247
1248
1249        self.gitStream.close()
1250        if importProcess.wait() != 0:
1251            die("fast-import failed: %s" % self.gitError.read())
1252        self.gitOutput.close()
1253        self.gitError.close()
1254
1255        return True
1256
1257class P4Rebase(Command):
1258    def __init__(self):
1259        Command.__init__(self)
1260        self.options = [ ]
1261        self.description = ("Fetches the latest revision from perforce and "
1262                            + "rebases the current work (branch) against it")
1263
1264    def run(self, args):
1265        sync = P4Sync()
1266        sync.run([])
1267        print "Rebasing the current branch"
1268        oldHead = read_pipe("git rev-parse HEAD").strip()
1269        system("git rebase p4")
1270        system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
1271        return True
1272
1273class P4Clone(P4Sync):
1274    def __init__(self):
1275        P4Sync.__init__(self)
1276        self.description = "Creates a new git repository and imports from Perforce into it"
1277        self.usage = "usage: %prog [options] //depot/path[@revRange]"
1278        self.options.append(
1279            optparse.make_option("--destination", dest="cloneDestination",
1280                                 action='store', default=None,
1281                                 help="where to leave result of the clone"))
1282        self.cloneDestination = None
1283        self.needsGit = False
1284
1285    def run(self, args):
1286        global gitdir
1287
1288        if len(args) < 1:
1289            return False
1290
1291        if self.keepRepoPath and not self.cloneDestination:
1292            sys.stderr.write("Must specify destination for --keep-path\n")
1293            sys.exit(1)
1294
1295        depotPaths = args
1296        for p in depotPaths:
1297            if not p.startswith("//"):
1298                return False
1299
1300        if not self.cloneDestination:
1301            depotPath = args[0]
1302            depotDir = re.sub("(@[^@]*)$", "", depotPath)
1303            depotDir = re.sub("(#[^#]*)$", "", depotDir)
1304            depotDir = re.sub(r"\.\.\.$,", "", depotDir)
1305            depotDir = re.sub(r"/$", "", depotDir)
1306
1307            self.cloneDestination = os.path.split(depotDir)[1]
1308
1309        print "Importing from %s into %s" % (`depotPaths`, self.cloneDestination)
1310        os.makedirs(self.cloneDestination)
1311        os.chdir(self.cloneDestination)
1312        system("git init")
1313        gitdir = os.getcwd() + "/.git"
1314        if not P4Sync.run(self, depotPaths):
1315            return False
1316        if self.branch != "master":
1317            if gitBranchExists("refs/remotes/p4/master"):
1318                system("git branch master refs/remotes/p4/master")
1319                system("git checkout -f")
1320            else:
1321                print "Could not detect main branch. No checkout/master branch created."
1322        return True
1323
1324class HelpFormatter(optparse.IndentedHelpFormatter):
1325    def __init__(self):
1326        optparse.IndentedHelpFormatter.__init__(self)
1327
1328    def format_description(self, description):
1329        if description:
1330            return description + "\n"
1331        else:
1332            return ""
1333
1334def printUsage(commands):
1335    print "usage: %s <command> [options]" % sys.argv[0]
1336    print ""
1337    print "valid commands: %s" % ", ".join(commands)
1338    print ""
1339    print "Try %s <command> --help for command specific help." % sys.argv[0]
1340    print ""
1341
1342commands = {
1343    "debug" : P4Debug(),
1344    "submit" : P4Submit(),
1345    "sync" : P4Sync(),
1346    "rebase" : P4Rebase(),
1347    "clone" : P4Clone(),
1348    "rollback" : P4RollBack()
1349}
1350
1351
1352def main():
1353    if len(sys.argv[1:]) == 0:
1354        printUsage(commands.keys())
1355        sys.exit(2)
1356
1357    cmd = ""
1358    cmdName = sys.argv[1]
1359    try:
1360        cmd = commands[cmdName]
1361    except KeyError:
1362        print "unknown command %s" % cmdName
1363        print ""
1364        printUsage(commands.keys())
1365        sys.exit(2)
1366
1367    options = cmd.options
1368    cmd.gitdir = gitdir
1369
1370    args = sys.argv[2:]
1371
1372    if len(options) > 0:
1373        options.append(optparse.make_option("--git-dir", dest="gitdir"))
1374
1375        parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
1376                                       options,
1377                                       description = cmd.description,
1378                                       formatter = HelpFormatter())
1379
1380        (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
1381    global verbose
1382    verbose = cmd.verbose
1383    if cmd.needsGit:
1384        gitdir = cmd.gitdir
1385        if len(gitdir) == 0:
1386            gitdir = ".git"
1387            if not isValidGitDir(gitdir):
1388                gitdir = read_pipe("git rev-parse --git-dir").strip()
1389                if os.path.exists(gitdir):
1390                    cdup = read_pipe("git rev-parse --show-cdup").strip()
1391                    if len(cdup) > 0:
1392                        os.chdir(cdup);
1393
1394        if not isValidGitDir(gitdir):
1395            if isValidGitDir(gitdir + "/.git"):
1396                gitdir += "/.git"
1397            else:
1398                die("fatal: cannot locate git repository at %s" % gitdir)
1399
1400        os.environ["GIT_DIR"] = gitdir
1401
1402    if not cmd.run(args):
1403        parser.print_help()
1404
1405
1406if __name__ == '__main__':
1407    main()