Removed the .py extension from git-p4 as it's annoying to type every time.

Signed-off-by: Simon Hausmann <hausmann@kde.org>

1 files changed, 945 insertions, 0 deletions

diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4
new file mode 100755
index 0000000000..06858844e5
--- /dev/null
+++ b/contrib/fast-import/git-p4
@@ -0,0 +1,945 @@
+#!/usr/bin/env python
+#
+# git-p4.py -- A tool for bidirectional operation between a Perforce depot and git.
+#
+# Author: Simon Hausmann <hausmann@kde.org>
+# Copyright: 2007 Simon Hausmann <hausmann@kde.org>
+#            2007 Trolltech ASA
+# License: MIT <http://www.opensource.org/licenses/mit-license.php>
+#
+
+import optparse, sys, os, marshal, popen2, shelve
+import tempfile, getopt, sha, os.path, time
+from sets import Set;
+
+gitdir = os.environ.get("GIT_DIR", "")
+
+def p4CmdList(cmd):
+    cmd = "p4 -G %s" % cmd
+    pipe = os.popen(cmd, "rb")
+
+    result = []
+    try:
+        while True:
+            entry = marshal.load(pipe)
+            result.append(entry)
+    except EOFError:
+        pass
+    pipe.close()
+
+    return result
+
+def p4Cmd(cmd):
+    list = p4CmdList(cmd)
+    result = {}
+    for entry in list:
+        result.update(entry)
+    return result;
+
+def die(msg):
+    sys.stderr.write(msg + "\n")
+    sys.exit(1)
+
+def currentGitBranch():
+    return os.popen("git-name-rev HEAD").read().split(" ")[1][:-1]
+
+def isValidGitDir(path):
+    if os.path.exists(path + "/HEAD") and os.path.exists(path + "/refs") and os.path.exists(path + "/objects"):
+        return True;
+    return False
+
+def system(cmd):
+    if os.system(cmd) != 0:
+        die("command failed: %s" % cmd)
+
+class Command:
+    def __init__(self):
+        self.usage = "usage: %prog [options]"
+
+class P4Debug(Command):
+    def __init__(self):
+        self.options = [
+        ]
+        self.description = "A tool to debug the output of p4 -G."
+
+    def run(self, args):
+        for output in p4CmdList(" ".join(args)):
+            print output
+        return True
+
+class P4CleanTags(Command):
+    def __init__(self):
+        Command.__init__(self)
+        self.options = [
+#                optparse.make_option("--branch", dest="branch", default="refs/heads/master")
+        ]
+        self.description = "A tool to remove stale unused tags from incremental perforce imports."
+    def run(self, args):
+        branch = currentGitBranch()
+        print "Cleaning out stale p4 import tags..."
+        sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
+        output = sout.read()
+        try:
+            tagIdx = output.index(" tags/p4/")
+        except:
+            print "Cannot find any p4/* tag. Nothing to do."
+            sys.exit(0)
+
+        try:
+            caretIdx = output.index("^")
+        except:
+            caretIdx = len(output) - 1
+        rev = int(output[tagIdx + 9 : caretIdx])
+
+        allTags = os.popen("git tag -l p4/").readlines()
+        for i in range(len(allTags)):
+            allTags[i] = int(allTags[i][3:-1])
+
+        allTags.sort()
+
+        allTags.remove(rev)
+
+        for rev in allTags:
+            print os.popen("git tag -d p4/%s" % rev).read()
+
+        print "%s tags removed." % len(allTags)
+        return True
+
+class P4Sync(Command):
+    def __init__(self):
+        Command.__init__(self)
+        self.options = [
+                optparse.make_option("--continue", action="store_false", dest="firstTime"),
+                optparse.make_option("--origin", dest="origin"),
+                optparse.make_option("--reset", action="store_true", dest="reset"),
+                optparse.make_option("--master", dest="master"),
+                optparse.make_option("--log-substitutions", dest="substFile"),
+                optparse.make_option("--noninteractive", action="store_false"),
+                optparse.make_option("--dry-run", action="store_true"),
+                optparse.make_option("--apply-as-patch", action="store_true", dest="applyAsPatch")
+        ]
+        self.description = "Submit changes from git to the perforce depot."
+        self.firstTime = True
+        self.reset = False
+        self.interactive = True
+        self.dryRun = False
+        self.substFile = ""
+        self.firstTime = True
+        self.origin = "origin"
+        self.master = ""
+        self.applyAsPatch = True
+
+        self.logSubstitutions = {}
+        self.logSubstitutions["<enter description here>"] = "%log%"
+        self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
+
+    def check(self):
+        if len(p4CmdList("opened ...")) > 0:
+            die("You have files opened with perforce! Close them before starting the sync.")
+
+    def start(self):
+        if len(self.config) > 0 and not self.reset:
+            die("Cannot start sync. Previous sync config found at %s" % self.configFile)
+
+        commits = []
+        for line in os.popen("git-rev-list --no-merges %s..%s" % (self.origin, self.master)).readlines():
+            commits.append(line[:-1])
+        commits.reverse()
+
+        self.config["commits"] = commits
+
+        if not self.applyAsPatch:
+            print "Creating temporary p4-sync branch from %s ..." % self.origin
+            system("git checkout -f -b p4-sync %s" % self.origin)
+
+    def prepareLogMessage(self, template, message):
+        result = ""
+
+        for line in template.split("\n"):
+            if line.startswith("#"):
+                result += line + "\n"
+                continue
+
+            substituted = False
+            for key in self.logSubstitutions.keys():
+                if line.find(key) != -1:
+                    value = self.logSubstitutions[key]
+                    value = value.replace("%log%", message)
+                    if value != "@remove@":
+                        result += line.replace(key, value) + "\n"
+                    substituted = True
+                    break
+
+            if not substituted:
+                result += line + "\n"
+
+        return result
+
+    def apply(self, id):
+        print "Applying %s" % (os.popen("git-log --max-count=1 --pretty=oneline %s" % id).read())
+        diff = os.popen("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id)).readlines()
+        filesToAdd = set()
+        filesToDelete = set()
+        for line in diff:
+            modifier = line[0]
+            path = line[1:].strip()
+            if modifier == "M":
+                system("p4 edit %s" % path)
+            elif modifier == "A":
+                filesToAdd.add(path)
+                if path in filesToDelete:
+                    filesToDelete.remove(path)
+            elif modifier == "D":
+                filesToDelete.add(path)
+                if path in filesToAdd:
+                    filesToAdd.remove(path)
+            else:
+                die("unknown modifier %s for %s" % (modifier, path))
+
+        if self.applyAsPatch:
+            system("git-diff-tree -p --diff-filter=ACMRTUXB \"%s^\" \"%s\" | patch -p1" % (id, id))
+        else:
+            system("git-diff-files --name-only -z | git-update-index --remove -z --stdin")
+            system("git cherry-pick --no-commit \"%s\"" % id)
+
+        for f in filesToAdd:
+            system("p4 add %s" % f)
+        for f in filesToDelete:
+            system("p4 revert %s" % f)
+            system("p4 delete %s" % f)
+
+        logMessage = ""
+        foundTitle = False
+        for log in os.popen("git-cat-file commit %s" % id).readlines():
+            if not foundTitle:
+                if len(log) == 1:
+                    foundTitle = 1
+                continue
+
+            if len(logMessage) > 0:
+                logMessage += "\t"
+            logMessage += log
+
+        template = os.popen("p4 change -o").read()
+
+        if self.interactive:
+            submitTemplate = self.prepareLogMessage(template, logMessage)
+            diff = os.popen("p4 diff -du ...").read()
+
+            for newFile in filesToAdd:
+                diff += "==== new file ====\n"
+                diff += "--- /dev/null\n"
+                diff += "+++ %s\n" % newFile
+                f = open(newFile, "r")
+                for line in f.readlines():
+                    diff += "+" + line
+                f.close()
+
+            separatorLine = "######## everything below this line is just the diff #######\n"
+
+            response = "e"
+            firstIteration = True
+            while response == "e":
+                if not firstIteration:
+                    response = raw_input("Do you want to submit this change (y/e/n)? ")
+                firstIteration = False
+                if response == "e":
+                    [handle, fileName] = tempfile.mkstemp()
+                    tmpFile = os.fdopen(handle, "w+")
+                    tmpFile.write(submitTemplate + separatorLine + diff)
+                    tmpFile.close()
+                    editor = os.environ.get("EDITOR", "vi")
+                    system(editor + " " + fileName)
+                    tmpFile = open(fileName, "r")
+                    message = tmpFile.read()
+                    tmpFile.close()
+                    os.remove(fileName)
+                    submitTemplate = message[:message.index(separatorLine)]
+
+            if response == "y" or response == "yes":
+               if self.dryRun:
+                   print submitTemplate
+                   raw_input("Press return to continue...")
+               else:
+                    pipe = os.popen("p4 submit -i", "w")
+                    pipe.write(submitTemplate)
+                    pipe.close()
+            else:
+                print "Not submitting!"
+                self.interactive = False
+        else:
+            fileName = "submit.txt"
+            file = open(fileName, "w+")
+            file.write(self.prepareLogMessage(template, logMessage))
+            file.close()
+            print "Perforce submit template written as %s. Please review/edit and then use p4 submit -i < %s to submit directly!" % (fileName, fileName)
+
+    def run(self, args):
+        if self.reset:
+            self.firstTime = True
+
+        if len(self.substFile) > 0:
+            for line in open(self.substFile, "r").readlines():
+                tokens = line[:-1].split("=")
+                self.logSubstitutions[tokens[0]] = tokens[1]
+
+        if len(self.master) == 0:
+            self.master = currentGitBranch()
+            if len(self.master) == 0 or not os.path.exists("%s/refs/heads/%s" % (gitdir, self.master)):
+                die("Detecting current git branch failed!")
+
+        self.check()
+        self.configFile = gitdir + "/p4-git-sync.cfg"
+        self.config = shelve.open(self.configFile, writeback=True)
+
+        if self.firstTime:
+            self.start()
+
+        commits = self.config.get("commits", [])
+
+        while len(commits) > 0:
+            self.firstTime = False
+            commit = commits[0]
+            commits = commits[1:]
+            self.config["commits"] = commits
+            self.apply(commit)
+            if not self.interactive:
+                break
+
+        self.config.close()
+
+        if len(commits) == 0:
+            if self.firstTime:
+                print "No changes found to apply between %s and current HEAD" % self.origin
+            else:
+                print "All changes applied!"
+                if not self.applyAsPatch:
+                    print "Deleting temporary p4-sync branch and going back to %s" % self.master
+                    system("git checkout %s" % self.master)
+                    system("git branch -D p4-sync")
+                    print "Cleaning out your perforce checkout by doing p4 edit ... ; p4 revert ..."
+                    system("p4 edit ... >/dev/null")
+                    system("p4 revert ... >/dev/null")
+            os.remove(self.configFile)
+
+        return True
+
+class GitSync(Command):
+    def __init__(self):
+        Command.__init__(self)
+        self.options = [
+                optparse.make_option("--branch", dest="branch"),
+                optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
+                optparse.make_option("--changesfile", dest="changesFile"),
+                optparse.make_option("--silent", dest="silent", action="store_true"),
+                optparse.make_option("--known-branches", dest="knownBranches"),
+                optparse.make_option("--cache", dest="doCache", action="store_true"),
+                optparse.make_option("--command-cache", dest="commandCache", action="store_true")
+        ]
+        self.description = """Imports from Perforce into a git repository.\n
+    example:
+    //depot/my/project/ -- to import the current head
+    //depot/my/project/@all -- to import everything
+    //depot/my/project/@1,6 -- to import only from revision 1 to 6
+
+    (a ... is not needed in the path p4 specification, it's added implicitly)"""
+
+        self.usage += " //depot/path[@revRange]"
+
+        self.dataCache = False
+        self.commandCache = False
+        self.silent = False
+        self.knownBranches = Set()
+        self.createdBranches = Set()
+        self.committedChanges = Set()
+        self.branch = "master"
+        self.detectBranches = False
+        self.changesFile = ""
+
+    def p4File(self, depotPath):
+        return os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
+
+    def extractFilesFromCommit(self, commit):
+        files = []
+        fnum = 0
+        while commit.has_key("depotFile%s" % fnum):
+            path =  commit["depotFile%s" % fnum]
+            if not path.startswith(self.globalPrefix):
+    #            if not self.silent:
+    #                print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, self.globalPrefix, change)
+                fnum = fnum + 1
+                continue
+
+            file = {}
+            file["path"] = path
+            file["rev"] = commit["rev%s" % fnum]
+            file["action"] = commit["action%s" % fnum]
+            file["type"] = commit["type%s" % fnum]
+            files.append(file)
+            fnum = fnum + 1
+        return files
+
+    def isSubPathOf(self, first, second):
+        if not first.startswith(second):
+            return False
+        if first == second:
+            return True
+        return first[len(second)] == "/"
+
+    def branchesForCommit(self, files):
+        branches = Set()
+
+        for file in files:
+            relativePath = file["path"][len(self.globalPrefix):]
+            # strip off the filename
+            relativePath = relativePath[0:relativePath.rfind("/")]
+
+    #        if len(branches) == 0:
+    #            branches.add(relativePath)
+    #            knownBranches.add(relativePath)
+    #            continue
+
+            ###### this needs more testing :)
+            knownBranch = False
+            for branch in branches:
+                if relativePath == branch:
+                    knownBranch = True
+                    break
+    #            if relativePath.startswith(branch):
+                if self.isSubPathOf(relativePath, branch):
+                    knownBranch = True
+                    break
+    #            if branch.startswith(relativePath):
+                if self.isSubPathOf(branch, relativePath):
+                    branches.remove(branch)
+                    break
+
+            if knownBranch:
+                continue
+
+            for branch in knownBranches:
+                #if relativePath.startswith(branch):
+                if self.isSubPathOf(relativePath, branch):
+                    if len(branches) == 0:
+                        relativePath = branch
+                    else:
+                        knownBranch = True
+                    break
+
+            if knownBranch:
+                continue
+
+            branches.add(relativePath)
+            self.knownBranches.add(relativePath)
+
+        return branches
+
+    def findBranchParent(self, branchPrefix, files):
+        for file in files:
+            path = file["path"]
+            if not path.startswith(branchPrefix):
+                continue
+            action = file["action"]
+            if action != "integrate" and action != "branch":
+                continue
+            rev = file["rev"]
+            depotPath = path + "#" + rev
+
+            log = p4CmdList("filelog \"%s\"" % depotPath)
+            if len(log) != 1:
+                print "eek! I got confused by the filelog of %s" % depotPath
+                sys.exit(1);
+
+            log = log[0]
+            if log["action0"] != action:
+                print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
+                sys.exit(1);
+
+            branchAction = log["how0,0"]
+    #        if branchAction == "branch into" or branchAction == "ignored":
+    #            continue # ignore for branching
+
+            if not branchAction.endswith(" from"):
+                continue # ignore for branching
+    #            print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
+    #            sys.exit(1);
+
+            source = log["file0,0"]
+            if source.startswith(branchPrefix):
+                continue
+
+            lastSourceRev = log["erev0,0"]
+
+            sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
+            if len(sourceLog) != 1:
+                print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
+                sys.exit(1);
+            sourceLog = sourceLog[0]
+
+            relPath = source[len(self.globalPrefix):]
+            # strip off the filename
+            relPath = relPath[0:relPath.rfind("/")]
+
+            for branch in self.knownBranches:
+                if self.isSubPathOf(relPath, branch):
+    #                print "determined parent branch branch %s due to change in file %s" % (branch, source)
+                    return branch
+    #            else:
+    #                print "%s is not a subpath of branch %s" % (relPath, branch)
+
+        return ""
+
+    def commit(self, details, files, branch, branchPrefix, parent = "", merged = ""):
+        epoch = details["time"]
+        author = details["user"]
+
+        self.gitStream.write("commit %s\n" % branch)
+    #    gitStream.write("mark :%s\n" % details["change"])
+        self.committedChanges.add(int(details["change"]))
+        committer = ""
+        if author in self.users:
+            committer = "%s %s %s" % (self.users[author], epoch, self.tz)
+        else:
+            committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
+
+        self.gitStream.write("committer %s\n" % committer)
+
+        self.gitStream.write("data <<EOT\n")
+        self.gitStream.write(details["desc"])
+        self.gitStream.write("\n[ imported from %s; change %s ]\n" % (branchPrefix, details["change"]))
+        self.gitStream.write("EOT\n\n")
+
+        if len(parent) > 0:
+            self.gitStream.write("from %s\n" % parent)
+
+        if len(merged) > 0:
+            self.gitStream.write("merge %s\n" % merged)
+
+        for file in files:
+            path = file["path"]
+            if not path.startswith(branchPrefix):
+    #            if not silent:
+    #                print "\nchanged files: ignoring path %s outside of branch prefix %s in change %s" % (path, branchPrefix, details["change"])
+                continue
+            rev = file["rev"]
+            depotPath = path + "#" + rev
+            relPath = path[len(branchPrefix):]
+            action = file["action"]
+
+            if file["type"] == "apple":
+                print "\nfile %s is a strange apple file that forks. Ignoring!" % path
+                continue
+
+            if action == "delete":
+                self.gitStream.write("D %s\n" % relPath)
+            else:
+                mode = 644
+                if file["type"].startswith("x"):
+                    mode = 755
+
+                data = self.p4File(depotPath)
+
+                self.gitStream.write("M %s inline %s\n" % (mode, relPath))
+                self.gitStream.write("data %s\n" % len(data))
+                self.gitStream.write(data)
+                self.gitStream.write("\n")
+
+        self.gitStream.write("\n")
+
+        self.lastChange = int(details["change"])
+
+    def extractFilesInCommitToBranch(self, files, branchPrefix):
+        newFiles = []
+
+        for file in files:
+            path = file["path"]
+            if path.startswith(branchPrefix):
+                newFiles.append(file)
+
+        return newFiles
+
+    def findBranchSourceHeuristic(self, files, branch, branchPrefix):
+        for file in files:
+            action = file["action"]
+            if action != "integrate" and action != "branch":
+                continue
+            path = file["path"]
+            rev = file["rev"]
+            depotPath = path + "#" + rev
+
+            log = p4CmdList("filelog \"%s\"" % depotPath)
+            if len(log) != 1:
+                print "eek! I got confused by the filelog of %s" % depotPath
+                sys.exit(1);
+
+            log = log[0]
+            if log["action0"] != action:
+                print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
+                sys.exit(1);
+
+            branchAction = log["how0,0"]
+
+            if not branchAction.endswith(" from"):
+                continue # ignore for branching
+    #            print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
+    #            sys.exit(1);
+
+            source = log["file0,0"]
+            if source.startswith(branchPrefix):
+                continue
+
+            lastSourceRev = log["erev0,0"]
+
+            sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
+            if len(sourceLog) != 1:
+                print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
+                sys.exit(1);
+            sourceLog = sourceLog[0]
+
+            relPath = source[len(self.globalPrefix):]
+            # strip off the filename
+            relPath = relPath[0:relPath.rfind("/")]
+
+            for candidate in self.knownBranches:
+                if self.isSubPathOf(relPath, candidate) and candidate != branch:
+                    return candidate
+
+        return ""
+
+    def changeIsBranchMerge(self, sourceBranch, destinationBranch, change):
+        sourceFiles = {}
+        for file in p4CmdList("files %s...@%s" % (self.globalPrefix + sourceBranch + "/", change)):
+            if file["action"] == "delete":
+                continue
+            sourceFiles[file["depotFile"]] = file
+
+        destinationFiles = {}
+        for file in p4CmdList("files %s...@%s" % (self.globalPrefix + destinationBranch + "/", change)):
+            destinationFiles[file["depotFile"]] = file
+
+        for fileName in sourceFiles.keys():
+            integrations = []
+            deleted = False
+            integrationCount = 0
+            for integration in p4CmdList("integrated \"%s\"" % fileName):
+                toFile = integration["fromFile"] # yes, it's true, it's fromFile
+                if not toFile in destinationFiles:
+                    continue
+                destFile = destinationFiles[toFile]
+                if destFile["action"] == "delete":
+    #                print "file %s has been deleted in %s" % (fileName, toFile)
+                    deleted = True
+                    break
+                integrationCount += 1
+                if integration["how"] == "branch from":
+                    continue
+
+                if int(integration["change"]) == change:
+                    integrations.append(integration)
+                    continue
+                if int(integration["change"]) > change:
+                    continue
+
+                destRev = int(destFile["rev"])
+
+                startRev = integration["startFromRev"][1:]
+                if startRev == "none":
+                    startRev = 0
+                else:
+                    startRev = int(startRev)
+
+                endRev = integration["endFromRev"][1:]
+                if endRev == "none":
+                    endRev = 0
+                else:
+                    endRev = int(endRev)
+
+                initialBranch = (destRev == 1 and integration["how"] != "branch into")
+                inRange = (destRev >= startRev and destRev <= endRev)
+                newer = (destRev > startRev and destRev > endRev)
+
+                if initialBranch or inRange or newer:
+                    integrations.append(integration)
+
+            if deleted:
+                continue
+
+            if len(integrations) == 0 and integrationCount > 1:
+                print "file %s was not integrated from %s into %s" % (fileName, sourceBranch, destinationBranch)
+                return False
+
+        return True
+
+    def getUserMap(self):
+        self.users = {}
+
+        for output in p4CmdList("users"):
+            if not output.has_key("User"):
+                continue
+            self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
+
+    def run(self, args):
+        self.branch = "refs/heads/" + self.branch
+        self.globalPrefix = self.previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
+        if len(self.globalPrefix) != 0:
+            self.globalPrefix = self.globalPrefix[:-1]
+
+        if len(args) == 0 and len(self.globalPrefix) != 0:
+            if not self.silent:
+                print "[using previously specified depot path %s]" % self.globalPrefix
+        elif len(args) != 1:
+            return False
+        else:
+            if len(self.globalPrefix) != 0 and self.globalPrefix != args[0]:
+                print "previous import used depot path %s and now %s was specified. this doesn't work!" % (self.globalPrefix, args[0])
+                sys.exit(1)
+            self.globalPrefix = args[0]
+
+        self.changeRange = ""
+        self.revision = ""
+        self.users = {}
+        self.initialParent = ""
+        self.lastChange = 0
+        self.initialTag = ""
+
+        if self.globalPrefix.find("@") != -1:
+            atIdx = self.globalPrefix.index("@")
+            self.changeRange = self.globalPrefix[atIdx:]
+            if self.changeRange == "@all":
+                self.changeRange = ""
+            elif self.changeRange.find(",") == -1:
+                self.revision = self.changeRange
+                self.changeRange = ""
+            self.globalPrefix = self.globalPrefix[0:atIdx]
+        elif self.globalPrefix.find("#") != -1:
+            hashIdx = self.globalPrefix.index("#")
+            self.revision = self.globalPrefix[hashIdx:]
+            self.globalPrefix = self.globalPrefix[0:hashIdx]
+        elif len(self.previousDepotPath) == 0:
+            self.revision = "#head"
+
+        if self.globalPrefix.endswith("..."):
+            self.globalPrefix = self.globalPrefix[:-3]
+
+        if not self.globalPrefix.endswith("/"):
+            self.globalPrefix += "/"
+
+        self.getUserMap()
+
+        if len(self.changeRange) == 0:
+            try:
+                sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % self.branch)
+                output = sout.read()
+                if output.endswith("\n"):
+                    output = output[:-1]
+                tagIdx = output.index(" tags/p4/")
+                caretIdx = output.find("^")
+                endPos = len(output)
+                if caretIdx != -1:
+                    endPos = caretIdx
+                self.rev = int(output[tagIdx + 9 : endPos]) + 1
+                self.changeRange = "@%s,#head" % self.rev
+                self.initialParent = os.popen("git-rev-parse %s" % self.branch).read()[:-1]
+                self.initialTag = "p4/%s" % (int(self.rev) - 1)
+            except:
+                pass
+
+        self.tz = - time.timezone / 36
+        tzsign = ("%s" % self.tz)[0]
+        if tzsign != '+' and tzsign != '-':
+            self.tz = "+" + ("%s" % self.tz)
+
+        self.gitOutput, self.gitStream, self.gitError = popen2.popen3("git-fast-import")
+
+        if len(self.revision) > 0:
+            print "Doing initial import of %s from revision %s" % (self.globalPrefix, self.revision)
+
+            details = { "user" : "git perforce import user", "time" : int(time.time()) }
+            details["desc"] = "Initial import of %s from the state at revision %s" % (self.globalPrefix, self.revision)
+            details["change"] = self.revision
+            newestRevision = 0
+
+            fileCnt = 0
+            for info in p4CmdList("files %s...%s" % (self.globalPrefix, self.revision)):
+                change = int(info["change"])
+                if change > newestRevision:
+                    newestRevision = change
+
+                if info["action"] == "delete":
+                    fileCnt = fileCnt + 1
+                    continue
+
+                for prop in [ "depotFile", "rev", "action", "type" ]:
+                    details["%s%s" % (prop, fileCnt)] = info[prop]
+
+                fileCnt = fileCnt + 1
+
+            details["change"] = newestRevision
+
+            try:
+                self.commit(details, self.extractFilesFromCommit(details), self.branch, self.globalPrefix)
+            except IOError:
+                print self.gitError.read()
+
+        else:
+            changes = []
+
+            if len(self.changesFile) > 0:
+                output = open(self.changesFile).readlines()
+                changeSet = Set()
+                for line in output:
+                    changeSet.add(int(line))
+
+                for change in changeSet:
+                    changes.append(change)
+
+                changes.sort()
+            else:
+                output = os.popen("p4 changes %s...%s" % (self.globalPrefix, self.changeRange)).readlines()
+
+                for line in output:
+                    changeNum = line.split(" ")[1]
+                    changes.append(changeNum)
+
+                changes.reverse()
+
+            if len(changes) == 0:
+                if not self.silent:
+                    print "no changes to import!"
+                sys.exit(1)
+
+            cnt = 1
+            for change in changes:
+                description = p4Cmd("describe %s" % change)
+
+                if not self.silent:
+                    sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
+                    sys.stdout.flush()
+                cnt = cnt + 1
+
+                try:
+                    files = self.extractFilesFromCommit(description)
+                    if self.detectBranches:
+                        for branch in self.branchesForCommit(files):
+                            self.knownBranches.add(branch)
+                            branchPrefix = self.globalPrefix + branch + "/"
+
+                            filesForCommit = self.extractFilesInCommitToBranch(files, branchPrefix)
+
+                            merged = ""
+                            parent = ""
+                            ########### remove cnt!!!
+                            if branch not in self.createdBranches and cnt > 2:
+                                self.createdBranches.add(branch)
+                                parent = self.findBranchParent(branchPrefix, files)
+                                if parent == branch:
+                                    parent = ""
+            #                    elif len(parent) > 0:
+            #                        print "%s branched off of %s" % (branch, parent)
+
+                            if len(parent) == 0:
+                                merged = self.findBranchSourceHeuristic(filesForCommit, branch, branchPrefix)
+                                if len(merged) > 0:
+                                    print "change %s could be a merge from %s into %s" % (description["change"], merged, branch)
+                                    if not self.changeIsBranchMerge(merged, branch, int(description["change"])):
+                                        merged = ""
+
+                            branch = "refs/heads/" + branch
+                            if len(parent) > 0:
+                                parent = "refs/heads/" + parent
+                            if len(merged) > 0:
+                                merged = "refs/heads/" + merged
+                            self.commit(description, files, branch, branchPrefix, parent, merged)
+                    else:
+                        self.commit(description, files, self.branch, self.globalPrefix, self.initialParent)
+                        self.initialParent = ""
+                except IOError:
+                    print self.gitError.read()
+                    sys.exit(1)
+
+        if not self.silent:
+            print ""
+
+        self.gitStream.write("reset refs/tags/p4/%s\n" % self.lastChange)
+        self.gitStream.write("from %s\n\n" % self.branch);
+
+
+        self.gitStream.close()
+        self.gitOutput.close()
+        self.gitError.close()
+
+        os.popen("git-repo-config p4.depotpath %s" % self.globalPrefix).read()
+        if len(self.initialTag) > 0:
+            os.popen("git tag -d %s" % self.initialTag).read()
+
+        return True
+
+class HelpFormatter(optparse.IndentedHelpFormatter):
+    def __init__(self):
+        optparse.IndentedHelpFormatter.__init__(self)
+
+    def format_description(self, description):
+        if description:
+            return description + "\n"
+        else:
+            return ""
+
+def printUsage(commands):
+    print "usage: %s <command> [options]" % sys.argv[0]
+    print ""
+    print "valid commands: %s" % ", ".join(commands)
+    print ""
+    print "Try %s <command> --help for command specific help." % sys.argv[0]
+    print ""
+
+commands = {
+    "debug" : P4Debug(),
+    "clean-tags" : P4CleanTags(),
+    "submit" : P4Sync(),
+    "sync" : GitSync()
+}
+
+if len(sys.argv[1:]) == 0:
+    printUsage(commands.keys())
+    sys.exit(2)
+
+cmd = ""
+cmdName = sys.argv[1]
+try:
+    cmd = commands[cmdName]
+except KeyError:
+    print "unknown command %s" % cmdName
+    print ""
+    printUsage(commands.keys())
+    sys.exit(2)
+
+options = cmd.options
+cmd.gitdir = gitdir
+options.append(optparse.make_option("--git-dir", dest="gitdir"))
+
+parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
+                               options,
+                               description = cmd.description,
+                               formatter = HelpFormatter())
+
+(cmd, args) = parser.parse_args(sys.argv[2:], cmd);
+
+gitdir = cmd.gitdir
+if len(gitdir) == 0:
+    gitdir = ".git"
+    if not isValidGitDir(gitdir):
+        cdup = os.popen("git-rev-parse --show-cdup").read()[:-1]
+        if isValidGitDir(cdup + "/" + gitdir):
+            os.chdir(cdup)
+
+if not isValidGitDir(gitdir):
+    if isValidGitDir(gitdir + "/.git"):
+        gitdir += "/.git"
+    else:
+        die("fatal: cannot locate git repository at %s" % gitdir)
+
+os.environ["GIT_DIR"] = gitdir
+
+if not cmd.run(args):
+    parser.print_help()
+