Fix updating/creating remotes/p4/* heads from origin/p4/*
[git] / contrib / fast-import / git-p4
1 #!/usr/bin/env python
2 #
3 # git-p4.py -- A tool for bidirectional operation between a Perforce depot and git.
4 #
5 # Author: Simon Hausmann <simon@lst.de>
6 # Copyright: 2007 Simon Hausmann <simon@lst.de>
7 #            2007 Trolltech ASA
8 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
9 #
10
11 import optparse, sys, os, marshal, popen2, subprocess, shelve
12 import tempfile, getopt, sha, os.path, time, platform
13 import re
14
15 from sets import Set;
16
17 verbose = False
18
19 def die(msg):
20     if verbose:
21         raise Exception(msg)
22     else:
23         sys.stderr.write(msg + "\n")
24         sys.exit(1)
25
26 def write_pipe(c, str):
27     if verbose:
28         sys.stderr.write('Writing pipe: %s\n' % c)
29
30     pipe = os.popen(c, 'w')
31     val = pipe.write(str)
32     if pipe.close():
33         die('Command failed: %s' % c)
34
35     return val
36
37 def read_pipe(c, ignore_error=False):
38     if verbose:
39         sys.stderr.write('Reading pipe: %s\n' % c)
40
41     pipe = os.popen(c, 'rb')
42     val = pipe.read()
43     if pipe.close() and not ignore_error:
44         die('Command failed: %s' % c)
45
46     return val
47
48
49 def read_pipe_lines(c):
50     if verbose:
51         sys.stderr.write('Reading pipe: %s\n' % c)
52     ## todo: check return status
53     pipe = os.popen(c, 'rb')
54     val = pipe.readlines()
55     if pipe.close():
56         die('Command failed: %s' % c)
57
58     return val
59
60 def system(cmd):
61     if verbose:
62         sys.stderr.write("executing %s\n" % cmd)
63     if os.system(cmd) != 0:
64         die("command failed: %s" % cmd)
65
66 def p4CmdList(cmd):
67     cmd = "p4 -G %s" % cmd
68     if verbose:
69         sys.stderr.write("Opening pipe: %s\n" % cmd)
70     pipe = os.popen(cmd, "rb")
71
72     result = []
73     try:
74         while True:
75             entry = marshal.load(pipe)
76             result.append(entry)
77     except EOFError:
78         pass
79     exitCode = pipe.close()
80     if exitCode != None:
81         entry = {}
82         entry["p4ExitCode"] = exitCode
83         result.append(entry)
84
85     return result
86
87 def p4Cmd(cmd):
88     list = p4CmdList(cmd)
89     result = {}
90     for entry in list:
91         result.update(entry)
92     return result;
93
94 def p4Where(depotPath):
95     if not depotPath.endswith("/"):
96         depotPath += "/"
97     output = p4Cmd("where %s..." % depotPath)
98     if output["code"] == "error":
99         return ""
100     clientPath = ""
101     if "path" in output:
102         clientPath = output.get("path")
103     elif "data" in output:
104         data = output.get("data")
105         lastSpace = data.rfind(" ")
106         clientPath = data[lastSpace + 1:]
107
108     if clientPath.endswith("..."):
109         clientPath = clientPath[:-3]
110     return clientPath
111
112 def currentGitBranch():
113     return read_pipe("git name-rev HEAD").split(" ")[1].strip()
114
115 def isValidGitDir(path):
116     if (os.path.exists(path + "/HEAD")
117         and os.path.exists(path + "/refs") and os.path.exists(path + "/objects")):
118         return True;
119     return False
120
121 def parseRevision(ref):
122     return read_pipe("git rev-parse %s" % ref).strip()
123
124 def extractLogMessageFromGitCommit(commit):
125     logMessage = ""
126
127     ## fixme: title is first line of commit, not 1st paragraph.
128     foundTitle = False
129     for log in read_pipe_lines("git cat-file commit %s" % commit):
130        if not foundTitle:
131            if len(log) == 1:
132                foundTitle = True
133            continue
134
135        logMessage += log
136     return logMessage
137
138 def extractSettingsGitLog(log):
139     values = {}
140     for line in log.split("\n"):
141         line = line.strip()
142         m = re.search (r"^ *\[git-p4: (.*)\]$", line)
143         if not m:
144             continue
145
146         assignments = m.group(1).split (':')
147         for a in assignments:
148             vals = a.split ('=')
149             key = vals[0].strip()
150             val = ('='.join (vals[1:])).strip()
151             if val.endswith ('\"') and val.startswith('"'):
152                 val = val[1:-1]
153
154             values[key] = val
155
156     paths = values.get("depot-paths")
157     if not paths:
158         paths = values.get("depot-path")
159     if paths:
160         values['depot-paths'] = paths.split(',')
161     return values
162
163 def gitBranchExists(branch):
164     proc = subprocess.Popen(["git", "rev-parse", branch],
165                             stderr=subprocess.PIPE, stdout=subprocess.PIPE);
166     return proc.wait() == 0;
167
168 def gitConfig(key):
169     return read_pipe("git config %s" % key, ignore_error=True).strip()
170
171 class Command:
172     def __init__(self):
173         self.usage = "usage: %prog [options]"
174         self.needsGit = True
175
176 class P4Debug(Command):
177     def __init__(self):
178         Command.__init__(self)
179         self.options = [
180             optparse.make_option("--verbose", dest="verbose", action="store_true",
181                                  default=False),
182             ]
183         self.description = "A tool to debug the output of p4 -G."
184         self.needsGit = False
185         self.verbose = False
186
187     def run(self, args):
188         j = 0
189         for output in p4CmdList(" ".join(args)):
190             print 'Element: %d' % j
191             j += 1
192             print output
193         return True
194
195 class P4RollBack(Command):
196     def __init__(self):
197         Command.__init__(self)
198         self.options = [
199             optparse.make_option("--verbose", dest="verbose", action="store_true"),
200             optparse.make_option("--local", dest="rollbackLocalBranches", action="store_true")
201         ]
202         self.description = "A tool to debug the multi-branch import. Don't use :)"
203         self.verbose = False
204         self.rollbackLocalBranches = False
205
206     def run(self, args):
207         if len(args) != 1:
208             return False
209         maxChange = int(args[0])
210
211         if "p4ExitCode" in p4Cmd("changes -m 1"):
212             die("Problems executing p4");
213
214         if self.rollbackLocalBranches:
215             refPrefix = "refs/heads/"
216             lines = read_pipe_lines("git rev-parse --symbolic --branches")
217         else:
218             refPrefix = "refs/remotes/"
219             lines = read_pipe_lines("git rev-parse --symbolic --remotes")
220
221         for line in lines:
222             if self.rollbackLocalBranches or (line.startswith("p4/") and line != "p4/HEAD\n"):
223                 line = line.strip()
224                 ref = refPrefix + line
225                 log = extractLogMessageFromGitCommit(ref)
226                 settings = extractSettingsGitLog(log)
227
228                 depotPaths = settings['depot-paths']
229                 change = settings['change']
230
231                 changed = False
232
233                 if len(p4Cmd("changes -m 1 "  + ' '.join (['%s...@%s' % (p, maxChange)
234                                                            for p in depotPaths]))) == 0:
235                     print "Branch %s did not exist at change %s, deleting." % (ref, maxChange)
236                     system("git update-ref -d %s `git rev-parse %s`" % (ref, ref))
237                     continue
238
239                 while change and int(change) > maxChange:
240                     changed = True
241                     if self.verbose:
242                         print "%s is at %s ; rewinding towards %s" % (ref, change, maxChange)
243                     system("git update-ref %s \"%s^\"" % (ref, ref))
244                     log = extractLogMessageFromGitCommit(ref)
245                     settings =  extractSettingsGitLog(log)
246
247
248                     depotPaths = settings['depot-paths']
249                     change = settings['change']
250
251                 if changed:
252                     print "%s rewound to %s" % (ref, change)
253
254         return True
255
256 class P4Submit(Command):
257     def __init__(self):
258         Command.__init__(self)
259         self.options = [
260                 optparse.make_option("--continue", action="store_false", dest="firstTime"),
261                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
262                 optparse.make_option("--origin", dest="origin"),
263                 optparse.make_option("--reset", action="store_true", dest="reset"),
264                 optparse.make_option("--log-substitutions", dest="substFile"),
265                 optparse.make_option("--dry-run", action="store_true"),
266                 optparse.make_option("--direct", dest="directSubmit", action="store_true"),
267                 optparse.make_option("--trust-me-like-a-fool", dest="trustMeLikeAFool", action="store_true"),
268         ]
269         self.description = "Submit changes from git to the perforce depot."
270         self.usage += " [name of git branch to submit into perforce depot]"
271         self.firstTime = True
272         self.reset = False
273         self.interactive = True
274         self.dryRun = False
275         self.substFile = ""
276         self.firstTime = True
277         self.origin = ""
278         self.directSubmit = False
279         self.trustMeLikeAFool = False
280         self.verbose = False
281         self.isWindows = (platform.system() == "Windows")
282
283         self.logSubstitutions = {}
284         self.logSubstitutions["<enter description here>"] = "%log%"
285         self.logSubstitutions["\tDetails:"] = "\tDetails:  %log%"
286
287     def check(self):
288         if len(p4CmdList("opened ...")) > 0:
289             die("You have files opened with perforce! Close them before starting the sync.")
290
291     def start(self):
292         if len(self.config) > 0 and not self.reset:
293             die("Cannot start sync. Previous sync config found at %s\n"
294                 "If you want to start submitting again from scratch "
295                 "maybe you want to call git-p4 submit --reset" % self.configFile)
296
297         commits = []
298         if self.directSubmit:
299             commits.append("0")
300         else:
301             for line in read_pipe_lines("git rev-list --no-merges %s..%s" % (self.origin, self.master)):
302                 commits.append(line.strip())
303             commits.reverse()
304
305         self.config["commits"] = commits
306
307     def prepareLogMessage(self, template, message):
308         result = ""
309
310         for line in template.split("\n"):
311             if line.startswith("#"):
312                 result += line + "\n"
313                 continue
314
315             substituted = False
316             for key in self.logSubstitutions.keys():
317                 if line.find(key) != -1:
318                     value = self.logSubstitutions[key]
319                     value = value.replace("%log%", message)
320                     if value != "@remove@":
321                         result += line.replace(key, value) + "\n"
322                     substituted = True
323                     break
324
325             if not substituted:
326                 result += line + "\n"
327
328         return result
329
330     def applyCommit(self, id):
331         if self.directSubmit:
332             print "Applying local change in working directory/index"
333             diff = self.diffStatus
334         else:
335             print "Applying %s" % (read_pipe("git log --max-count=1 --pretty=oneline %s" % id))
336             diff = read_pipe_lines("git diff-tree -r --name-status \"%s^\" \"%s\"" % (id, id))
337         filesToAdd = set()
338         filesToDelete = set()
339         editedFiles = set()
340         for line in diff:
341             modifier = line[0]
342             path = line[1:].strip()
343             if modifier == "M":
344                 system("p4 edit \"%s\"" % path)
345                 editedFiles.add(path)
346             elif modifier == "A":
347                 filesToAdd.add(path)
348                 if path in filesToDelete:
349                     filesToDelete.remove(path)
350             elif modifier == "D":
351                 filesToDelete.add(path)
352                 if path in filesToAdd:
353                     filesToAdd.remove(path)
354             else:
355                 die("unknown modifier %s for %s" % (modifier, path))
356
357         if self.directSubmit:
358             diffcmd = "cat \"%s\"" % self.diffFile
359         else:
360             diffcmd = "git format-patch -k --stdout \"%s^\"..\"%s\"" % (id, id)
361         patchcmd = diffcmd + " | git apply "
362         tryPatchCmd = patchcmd + "--check -"
363         applyPatchCmd = patchcmd + "--check --apply -"
364
365         if os.system(tryPatchCmd) != 0:
366             print "Unfortunately applying the change failed!"
367             print "What do you want to do?"
368             response = "x"
369             while response != "s" and response != "a" and response != "w":
370                 response = raw_input("[s]kip this patch / [a]pply the patch forcibly "
371                                      "and with .rej files / [w]rite the patch to a file (patch.txt) ")
372             if response == "s":
373                 print "Skipping! Good luck with the next patches..."
374                 return
375             elif response == "a":
376                 os.system(applyPatchCmd)
377                 if len(filesToAdd) > 0:
378                     print "You may also want to call p4 add on the following files:"
379                     print " ".join(filesToAdd)
380                 if len(filesToDelete):
381                     print "The following files should be scheduled for deletion with p4 delete:"
382                     print " ".join(filesToDelete)
383                 die("Please resolve and submit the conflict manually and "
384                     + "continue afterwards with git-p4 submit --continue")
385             elif response == "w":
386                 system(diffcmd + " > patch.txt")
387                 print "Patch saved to patch.txt in %s !" % self.clientPath
388                 die("Please resolve and submit the conflict manually and "
389                     "continue afterwards with git-p4 submit --continue")
390
391         system(applyPatchCmd)
392
393         for f in filesToAdd:
394             system("p4 add %s" % f)
395         for f in filesToDelete:
396             system("p4 revert %s" % f)
397             system("p4 delete %s" % f)
398
399         logMessage = ""
400         if not self.directSubmit:
401             logMessage = extractLogMessageFromGitCommit(id)
402             logMessage = logMessage.replace("\n", "\n\t")
403             if self.isWindows:
404                 logMessage = logMessage.replace("\n", "\r\n")
405             logMessage = logMessage.strip()
406
407         template = read_pipe("p4 change -o")
408
409         if self.interactive:
410             submitTemplate = self.prepareLogMessage(template, logMessage)
411             diff = read_pipe("p4 diff -du ...")
412
413             for newFile in filesToAdd:
414                 diff += "==== new file ====\n"
415                 diff += "--- /dev/null\n"
416                 diff += "+++ %s\n" % newFile
417                 f = open(newFile, "r")
418                 for line in f.readlines():
419                     diff += "+" + line
420                 f.close()
421
422             separatorLine = "######## everything below this line is just the diff #######"
423             if platform.system() == "Windows":
424                 separatorLine += "\r"
425             separatorLine += "\n"
426
427             response = "e"
428             if self.trustMeLikeAFool:
429                 response = "y"
430
431             firstIteration = True
432             while response == "e":
433                 if not firstIteration:
434                     response = raw_input("Do you want to submit this change? [y]es/[e]dit/[n]o/[s]kip ")
435                 firstIteration = False
436                 if response == "e":
437                     [handle, fileName] = tempfile.mkstemp()
438                     tmpFile = os.fdopen(handle, "w+")
439                     tmpFile.write(submitTemplate + separatorLine + diff)
440                     tmpFile.close()
441                     defaultEditor = "vi"
442                     if platform.system() == "Windows":
443                         defaultEditor = "notepad"
444                     editor = os.environ.get("EDITOR", defaultEditor);
445                     system(editor + " " + fileName)
446                     tmpFile = open(fileName, "rb")
447                     message = tmpFile.read()
448                     tmpFile.close()
449                     os.remove(fileName)
450                     submitTemplate = message[:message.index(separatorLine)]
451                     if self.isWindows:
452                         submitTemplate = submitTemplate.replace("\r\n", "\n")
453
454             if response == "y" or response == "yes":
455                if self.dryRun:
456                    print submitTemplate
457                    raw_input("Press return to continue...")
458                else:
459                    if self.directSubmit:
460                        print "Submitting to git first"
461                        os.chdir(self.oldWorkingDirectory)
462                        write_pipe("git commit -a -F -", submitTemplate)
463                        os.chdir(self.clientPath)
464
465                    write_pipe("p4 submit -i", submitTemplate)
466             elif response == "s":
467                 for f in editedFiles:
468                     system("p4 revert \"%s\"" % f);
469                 for f in filesToAdd:
470                     system("p4 revert \"%s\"" % f);
471                     system("rm %s" %f)
472                 for f in filesToDelete:
473                     system("p4 delete \"%s\"" % f);
474                 return
475             else:
476                 print "Not submitting!"
477                 self.interactive = False
478         else:
479             fileName = "submit.txt"
480             file = open(fileName, "w+")
481             file.write(self.prepareLogMessage(template, logMessage))
482             file.close()
483             print ("Perforce submit template written as %s. "
484                    + "Please review/edit and then use p4 submit -i < %s to submit directly!"
485                    % (fileName, fileName))
486
487     def run(self, args):
488         if len(args) == 0:
489             self.master = currentGitBranch()
490             if len(self.master) == 0 or not gitBranchExists("refs/heads/%s" % self.master):
491                 die("Detecting current git branch failed!")
492         elif len(args) == 1:
493             self.master = args[0]
494         else:
495             return False
496
497         depotPath = ""
498         parent = 0
499         while parent < 65535:
500             commit = "HEAD~%s" % parent
501             log = extractLogMessageFromGitCommit(commit)
502             settings = extractSettingsGitLog(log)
503             if not settings.has_key("depot-paths"):
504                 parent = parent + 1
505                 continue
506
507             depotPath = settings['depot-paths'][0]
508
509             if len(self.origin) == 0:
510                 names = read_pipe_lines("git name-rev '--refs=refs/remotes/p4/*' '%s'" % commit)
511                 if len(names) > 0:
512                     # strip away the beginning of 'HEAD~42 refs/remotes/p4/foo'
513                     self.origin = names[0].strip()[len(commit) + 1:]
514
515             break
516
517         if self.verbose:
518             print "Origin branch is " + self.origin
519
520         if len(depotPath) == 0:
521             print "Internal error: cannot locate perforce depot path from existing branches"
522             sys.exit(128)
523
524         self.clientPath = p4Where(depotPath)
525
526         if len(self.clientPath) == 0:
527             print "Error: Cannot locate perforce checkout of %s in client view" % depotPath
528             sys.exit(128)
529
530         print "Perforce checkout for depot path %s located at %s" % (depotPath, self.clientPath)
531         self.oldWorkingDirectory = os.getcwd()
532
533         if self.directSubmit:
534             self.diffStatus = read_pipe_lines("git diff -r --name-status HEAD")
535             if len(self.diffStatus) == 0:
536                 print "No changes in working directory to submit."
537                 return True
538             patch = read_pipe("git diff -p --binary --diff-filter=ACMRTUXB HEAD")
539             self.diffFile = self.gitdir + "/p4-git-diff"
540             f = open(self.diffFile, "wb")
541             f.write(patch)
542             f.close();
543
544         os.chdir(self.clientPath)
545         response = raw_input("Do you want to sync %s with p4 sync? [y]es/[n]o " % self.clientPath)
546         if response == "y" or response == "yes":
547             system("p4 sync ...")
548
549         if self.reset:
550             self.firstTime = True
551
552         if len(self.substFile) > 0:
553             for line in open(self.substFile, "r").readlines():
554                 tokens = line.strip().split("=")
555                 self.logSubstitutions[tokens[0]] = tokens[1]
556
557         self.check()
558         self.configFile = self.gitdir + "/p4-git-sync.cfg"
559         self.config = shelve.open(self.configFile, writeback=True)
560
561         if self.firstTime:
562             self.start()
563
564         commits = self.config.get("commits", [])
565
566         while len(commits) > 0:
567             self.firstTime = False
568             commit = commits[0]
569             commits = commits[1:]
570             self.config["commits"] = commits
571             self.applyCommit(commit)
572             if not self.interactive:
573                 break
574
575         self.config.close()
576
577         if self.directSubmit:
578             os.remove(self.diffFile)
579
580         if len(commits) == 0:
581             if self.firstTime:
582                 print "No changes found to apply between %s and current HEAD" % self.origin
583             else:
584                 print "All changes applied!"
585                 os.chdir(self.oldWorkingDirectory)
586                 response = raw_input("Do you want to sync from Perforce now using git-p4 rebase? [y]es/[n]o ")
587                 if response == "y" or response == "yes":
588                     rebase = P4Rebase()
589                     rebase.run([])
590             os.remove(self.configFile)
591
592         return True
593
594 class P4Sync(Command):
595     def __init__(self):
596         Command.__init__(self)
597         self.options = [
598                 optparse.make_option("--branch", dest="branch"),
599                 optparse.make_option("--detect-branches", dest="detectBranches", action="store_true"),
600                 optparse.make_option("--changesfile", dest="changesFile"),
601                 optparse.make_option("--silent", dest="silent", action="store_true"),
602                 optparse.make_option("--detect-labels", dest="detectLabels", action="store_true"),
603                 optparse.make_option("--verbose", dest="verbose", action="store_true"),
604                 optparse.make_option("--import-local", dest="importIntoRemotes", action="store_false",
605                                      help="Import into refs/heads/ , not refs/remotes"),
606                 optparse.make_option("--max-changes", dest="maxChanges"),
607                 optparse.make_option("--keep-path", dest="keepRepoPath", action='store_true',
608                                      help="Keep entire BRANCH/DIR/SUBDIR prefix during import")
609         ]
610         self.description = """Imports from Perforce into a git repository.\n
611     example:
612     //depot/my/project/ -- to import the current head
613     //depot/my/project/@all -- to import everything
614     //depot/my/project/@1,6 -- to import only from revision 1 to 6
615
616     (a ... is not needed in the path p4 specification, it's added implicitly)"""
617
618         self.usage += " //depot/path[@revRange]"
619         self.silent = False
620         self.createdBranches = Set()
621         self.committedChanges = Set()
622         self.branch = ""
623         self.detectBranches = False
624         self.detectLabels = False
625         self.changesFile = ""
626         self.syncWithOrigin = True
627         self.verbose = False
628         self.importIntoRemotes = True
629         self.maxChanges = ""
630         self.isWindows = (platform.system() == "Windows")
631         self.keepRepoPath = False
632         self.depotPaths = None
633
634         if gitConfig("git-p4.syncFromOrigin") == "false":
635             self.syncWithOrigin = False
636
637     def extractFilesFromCommit(self, commit):
638         files = []
639         fnum = 0
640         while commit.has_key("depotFile%s" % fnum):
641             path =  commit["depotFile%s" % fnum]
642
643             found = [p for p in self.depotPaths
644                      if path.startswith (p)]
645             if not found:
646                 fnum = fnum + 1
647                 continue
648
649             file = {}
650             file["path"] = path
651             file["rev"] = commit["rev%s" % fnum]
652             file["action"] = commit["action%s" % fnum]
653             file["type"] = commit["type%s" % fnum]
654             files.append(file)
655             fnum = fnum + 1
656         return files
657
658     def stripRepoPath(self, path, prefixes):
659         if self.keepRepoPath:
660             prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
661
662         for p in prefixes:
663             if path.startswith(p):
664                 path = path[len(p):]
665
666         return path
667
668     def splitFilesIntoBranches(self, commit):
669         branches = {}
670         fnum = 0
671         while commit.has_key("depotFile%s" % fnum):
672             path =  commit["depotFile%s" % fnum]
673             found = [p for p in self.depotPaths
674                      if path.startswith (p)]
675             if not found:
676                 fnum = fnum + 1
677                 continue
678
679             file = {}
680             file["path"] = path
681             file["rev"] = commit["rev%s" % fnum]
682             file["action"] = commit["action%s" % fnum]
683             file["type"] = commit["type%s" % fnum]
684             fnum = fnum + 1
685
686             relPath = self.stripRepoPath(path, self.depotPaths)
687
688             for branch in self.knownBranches.keys():
689
690                 # add a trailing slash so that a commit into qt/4.2foo doesn't end up in qt/4.2
691                 if relPath.startswith(branch + "/"):
692                     if branch not in branches:
693                         branches[branch] = []
694                     branches[branch].append(file)
695
696         return branches
697
698     ## Should move this out, doesn't use SELF.
699     def readP4Files(self, files):
700         files = [f for f in files
701                  if f['action'] != 'delete']
702
703         if not files:
704             return
705
706         filedata = p4CmdList('print %s' % ' '.join(['"%s#%s"' % (f['path'],
707                                                                  f['rev'])
708                                                     for f in files]))
709
710         j = 0;
711         contents = {}
712         while j < len(filedata):
713             stat = filedata[j]
714             j += 1
715             text = ''
716             while j < len(filedata) and filedata[j]['code'] in ('text',
717                                                                 'binary'):
718                 text += filedata[j]['data']
719                 j += 1
720
721
722             if not stat.has_key('depotFile'):
723                 sys.stderr.write("p4 print fails with: %s\n" % repr(stat))
724                 continue
725
726             contents[stat['depotFile']] = text
727
728         for f in files:
729             assert not f.has_key('data')
730             f['data'] = contents[f['path']]
731
732     def commit(self, details, files, branch, branchPrefixes, parent = ""):
733         epoch = details["time"]
734         author = details["user"]
735
736         if self.verbose:
737             print "commit into %s" % branch
738
739         # start with reading files; if that fails, we should not
740         # create a commit.
741         new_files = []
742         for f in files:
743             if [p for p in branchPrefixes if f['path'].startswith(p)]:
744                 new_files.append (f)
745             else:
746                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % path)
747         files = new_files
748         self.readP4Files(files)
749
750
751
752
753         self.gitStream.write("commit %s\n" % branch)
754 #        gitStream.write("mark :%s\n" % details["change"])
755         self.committedChanges.add(int(details["change"]))
756         committer = ""
757         if author not in self.users:
758             self.getUserMapFromPerforceServer()
759         if author in self.users:
760             committer = "%s %s %s" % (self.users[author], epoch, self.tz)
761         else:
762             committer = "%s <a@b> %s %s" % (author, epoch, self.tz)
763
764         self.gitStream.write("committer %s\n" % committer)
765
766         self.gitStream.write("data <<EOT\n")
767         self.gitStream.write(details["desc"])
768         self.gitStream.write("\n[git-p4: depot-paths = \"%s\": change = %s: "
769                              "options = %s]\n"
770                              % (','.join (branchPrefixes), details["change"],
771                                 details['options']
772                                 ))
773         self.gitStream.write("EOT\n\n")
774
775         if len(parent) > 0:
776             if self.verbose:
777                 print "parent %s" % parent
778             self.gitStream.write("from %s\n" % parent)
779
780         for file in files:
781             if file["type"] == "apple":
782                 print "\nfile %s is a strange apple file that forks. Ignoring!" % file['path']
783                 continue
784
785             relPath = self.stripRepoPath(file['path'], branchPrefixes)
786             if file["action"] == "delete":
787                 self.gitStream.write("D %s\n" % relPath)
788             else:
789                 mode = 644
790                 if file["type"].startswith("x"):
791                     mode = 755
792
793                 data = file['data']
794
795                 if self.isWindows and file["type"].endswith("text"):
796                     data = data.replace("\r\n", "\n")
797
798                 self.gitStream.write("M %d inline %s\n" % (mode, relPath))
799                 self.gitStream.write("data %s\n" % len(data))
800                 self.gitStream.write(data)
801                 self.gitStream.write("\n")
802
803         self.gitStream.write("\n")
804
805         change = int(details["change"])
806
807         if self.labels.has_key(change):
808             label = self.labels[change]
809             labelDetails = label[0]
810             labelRevisions = label[1]
811             if self.verbose:
812                 print "Change %s is labelled %s" % (change, labelDetails)
813
814             files = p4CmdList("files " + ' '.join (["%s...@%s" % (p, change)
815                                                     for p in branchPrefixes]))
816
817             if len(files) == len(labelRevisions):
818
819                 cleanedFiles = {}
820                 for info in files:
821                     if info["action"] == "delete":
822                         continue
823                     cleanedFiles[info["depotFile"]] = info["rev"]
824
825                 if cleanedFiles == labelRevisions:
826                     self.gitStream.write("tag tag_%s\n" % labelDetails["label"])
827                     self.gitStream.write("from %s\n" % branch)
828
829                     owner = labelDetails["Owner"]
830                     tagger = ""
831                     if author in self.users:
832                         tagger = "%s %s %s" % (self.users[owner], epoch, self.tz)
833                     else:
834                         tagger = "%s <a@b> %s %s" % (owner, epoch, self.tz)
835                     self.gitStream.write("tagger %s\n" % tagger)
836                     self.gitStream.write("data <<EOT\n")
837                     self.gitStream.write(labelDetails["Description"])
838                     self.gitStream.write("EOT\n\n")
839
840                 else:
841                     if not self.silent:
842                         print ("Tag %s does not match with change %s: files do not match."
843                                % (labelDetails["label"], change))
844
845             else:
846                 if not self.silent:
847                     print ("Tag %s does not match with change %s: file count is different."
848                            % (labelDetails["label"], change))
849
850     def getUserCacheFilename(self):
851         return os.environ["HOME"] + "/.gitp4-usercache.txt"
852
853     def getUserMapFromPerforceServer(self):
854         if self.userMapFromPerforceServer:
855             return
856         self.users = {}
857
858         for output in p4CmdList("users"):
859             if not output.has_key("User"):
860                 continue
861             self.users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
862
863
864         s = ''
865         for (key, val) in self.users.items():
866             s += "%s\t%s\n" % (key, val)
867
868         open(self.getUserCacheFilename(), "wb").write(s)
869         self.userMapFromPerforceServer = True
870
871     def loadUserMapFromCache(self):
872         self.users = {}
873         self.userMapFromPerforceServer = False
874         try:
875             cache = open(self.getUserCacheFilename(), "rb")
876             lines = cache.readlines()
877             cache.close()
878             for line in lines:
879                 entry = line.strip().split("\t")
880                 self.users[entry[0]] = entry[1]
881         except IOError:
882             self.getUserMapFromPerforceServer()
883
884     def getLabels(self):
885         self.labels = {}
886
887         l = p4CmdList("labels %s..." % ' '.join (self.depotPaths))
888         if len(l) > 0 and not self.silent:
889             print "Finding files belonging to labels in %s" % `self.depotPath`
890
891         for output in l:
892             label = output["label"]
893             revisions = {}
894             newestChange = 0
895             if self.verbose:
896                 print "Querying files for label %s" % label
897             for file in p4CmdList("files "
898                                   +  ' '.join (["%s...@%s" % (p, label)
899                                                 for p in self.depotPaths])):
900                 revisions[file["depotFile"]] = file["rev"]
901                 change = int(file["change"])
902                 if change > newestChange:
903                     newestChange = change
904
905             self.labels[newestChange] = [output, revisions]
906
907         if self.verbose:
908             print "Label changes: %s" % self.labels.keys()
909
910     def guessProjectName(self):
911         for p in self.depotPaths:
912             return p [p.strip().rfind("/") + 1:]
913
914     def getBranchMapping(self):
915         for info in p4CmdList("branches"):
916             details = p4Cmd("branch -o %s" % info["branch"])
917             viewIdx = 0
918             while details.has_key("View%s" % viewIdx):
919                 paths = details["View%s" % viewIdx].split(" ")
920                 viewIdx = viewIdx + 1
921                 # require standard //depot/foo/... //depot/bar/... mapping
922                 if len(paths) != 2 or not paths[0].endswith("/...") or not paths[1].endswith("/..."):
923                     continue
924                 source = paths[0]
925                 destination = paths[1]
926                 ## HACK
927                 if source.startswith(self.depotPaths[0]) and destination.startswith(self.depotPaths[0]):
928                     source = source[len(self.depotPaths[0]):-4]
929                     destination = destination[len(self.depotPaths[0]):-4]
930                     if destination not in self.knownBranches:
931                         self.knownBranches[destination] = source
932                     if source not in self.knownBranches:
933                         self.knownBranches[source] = source
934
935     def listExistingP4GitBranches(self):
936         self.p4BranchesInGit = []
937
938         cmdline = "git rev-parse --symbolic "
939         if self.importIntoRemotes:
940             cmdline += " --remotes"
941         else:
942             cmdline += " --branches"
943
944         for line in read_pipe_lines(cmdline):
945             line = line.strip()
946
947             ## only import to p4/
948             if not line.startswith('p4/') or line == "p4/HEAD":
949                 continue
950             branch = line
951
952             # strip off p4
953             branch = re.sub ("^p4/", "", line)
954
955             self.p4BranchesInGit.append(branch)
956             self.initialParents[self.refPrefix + branch] = parseRevision(line)
957
958     def createOrUpdateBranchesFromOrigin(self):
959         if not self.silent:
960             print ("Creating/updating branch(es) in %s based on origin branch(es)"
961                    % self.refPrefix)
962
963         originPrefix = "origin/p4/"
964
965         for line in read_pipe_lines("git rev-parse --symbolic --remotes"):
966             line = line.strip()
967             if (not line.startswith(originPrefix)) or line.endswith("HEAD"):
968                 continue
969
970             headName = line[len(originPrefix):]
971             remoteHead = self.refPrefix + headName
972             originHead = line
973
974             original = extractSettingsGitLog(extractLogMessageFromGitCommit(originHead))
975             if (not original.has_key('depot-paths')
976                 or not original.has_key('change')):
977                 continue
978
979             update = False
980             if not gitBranchExists(remoteHead):
981                 if self.verbose:
982                     print "creating %s" % remoteHead
983                 update = True
984             else:
985                 settings = extractSettingsGitLog(extractLogMessageFromGitCommit(remoteHead))
986                 if settings.has_key('change') > 0:
987                     if settings['depot-paths'] == original['depot-paths']:
988                         originP4Change = int(original['change'])
989                         p4Change = int(settings['change'])
990                         if originP4Change > p4Change:
991                             print ("%s (%s) is newer than %s (%s). "
992                                    "Updating p4 branch from origin."
993                                    % (originHead, originP4Change,
994                                       remoteHead, p4Change))
995                             update = True
996                     else:
997                         print ("Ignoring: %s was imported from %s while "
998                                "%s was imported from %s"
999                                % (originHead, ','.join(original['depot-paths']),
1000                                   remoteHead, ','.join(settings['depot-paths'])))
1001
1002             if update:
1003                 system("git update-ref %s %s" % (remoteHead, originHead))
1004
1005     def updateOptionDict(self, d):
1006         option_keys = {}
1007         if self.keepRepoPath:
1008             option_keys['keepRepoPath'] = 1
1009
1010         d["options"] = ' '.join(sorted(option_keys.keys()))
1011
1012     def readOptions(self, d):
1013         self.keepRepoPath = (d.has_key('options')
1014                              and ('keepRepoPath' in d['options']))
1015
1016     def run(self, args):
1017         self.depotPaths = []
1018         self.changeRange = ""
1019         self.initialParent = ""
1020         self.previousDepotPaths = []
1021
1022         # map from branch depot path to parent branch
1023         self.knownBranches = {}
1024         self.initialParents = {}
1025         self.hasOrigin = gitBranchExists("origin") or gitBranchExists("origin/p4") or gitBranchExists("origin/p4/master")
1026
1027         if self.importIntoRemotes:
1028             self.refPrefix = "refs/remotes/p4/"
1029         else:
1030             self.refPrefix = "refs/heads/p4/"
1031
1032         if self.syncWithOrigin and self.hasOrigin:
1033             if not self.silent:
1034                 print "Syncing with origin first by calling git fetch origin"
1035             system("git fetch origin")
1036
1037         if len(self.branch) == 0:
1038             self.branch = self.refPrefix + "master"
1039             if gitBranchExists("refs/heads/p4") and self.importIntoRemotes:
1040                 system("git update-ref %s refs/heads/p4" % self.branch)
1041                 system("git branch -D p4");
1042             # create it /after/ importing, when master exists
1043             if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes:
1044                 system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
1045
1046         # TODO: should always look at previous commits,
1047         # merge with previous imports, if possible.
1048         if args == []:
1049             if self.hasOrigin:
1050                 self.createOrUpdateBranchesFromOrigin()
1051             self.listExistingP4GitBranches()
1052
1053             if len(self.p4BranchesInGit) > 1:
1054                 if not self.silent:
1055                     print "Importing from/into multiple branches"
1056                 self.detectBranches = True
1057
1058             if self.verbose:
1059                 print "branches: %s" % self.p4BranchesInGit
1060
1061             p4Change = 0
1062             for branch in self.p4BranchesInGit:
1063                 logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
1064
1065                 settings = extractSettingsGitLog(logMsg)
1066
1067                 self.readOptions(settings)
1068                 if (settings.has_key('depot-paths')
1069                     and settings.has_key ('change')):
1070                     change = int(settings['change']) + 1
1071                     p4Change = max(p4Change, change)
1072
1073                     depotPaths = sorted(settings['depot-paths'])
1074                     if self.previousDepotPaths == []:
1075                         self.previousDepotPaths = depotPaths
1076                     else:
1077                         paths = []
1078                         for (prev, cur) in zip(self.previousDepotPaths, depotPaths):
1079                             for i in range(0, min(len(cur), len(prev))):
1080                                 if cur[i] <> prev[i]:
1081                                     i = i - 1
1082                                     break
1083
1084                             paths.append (cur[:i + 1])
1085
1086                         self.previousDepotPaths = paths
1087
1088             if p4Change > 0:
1089                 self.depotPaths = sorted(self.previousDepotPaths)
1090                 self.changeRange = "@%s,#head" % p4Change
1091                 if not self.detectBranches:
1092                     self.initialParent = parseRevision(self.branch)
1093                 if not self.silent and not self.detectBranches:
1094                     print "Performing incremental import into %s git branch" % self.branch
1095
1096         if not self.branch.startswith("refs/"):
1097             self.branch = "refs/heads/" + self.branch
1098
1099         if len(args) == 0 and self.depotPaths:
1100             if not self.silent:
1101                 print "Depot paths: %s" % ' '.join(self.depotPaths)
1102         else:
1103             if self.depotPaths and self.depotPaths != args:
1104                 print ("previous import used depot path %s and now %s was specified. "
1105                        "This doesn't work!" % (' '.join (self.depotPaths),
1106                                                ' '.join (args)))
1107                 sys.exit(1)
1108
1109             self.depotPaths = sorted(args)
1110
1111         self.revision = ""
1112         self.users = {}
1113
1114         newPaths = []
1115         for p in self.depotPaths:
1116             if p.find("@") != -1:
1117                 atIdx = p.index("@")
1118                 self.changeRange = p[atIdx:]
1119                 if self.changeRange == "@all":
1120                     self.changeRange = ""
1121                 elif ',' not in self.changeRange:
1122                     self.revision = self.changeRange
1123                     self.changeRange = ""
1124                 p = p[0:atIdx]
1125             elif p.find("#") != -1:
1126                 hashIdx = p.index("#")
1127                 self.revision = p[hashIdx:]
1128                 p = p[0:hashIdx]
1129             elif self.previousDepotPaths == []:
1130                 self.revision = "#head"
1131
1132             p = re.sub ("\.\.\.$", "", p)
1133             if not p.endswith("/"):
1134                 p += "/"
1135
1136             newPaths.append(p)
1137
1138         self.depotPaths = newPaths
1139
1140
1141         self.loadUserMapFromCache()
1142         self.labels = {}
1143         if self.detectLabels:
1144             self.getLabels();
1145
1146         if self.detectBranches:
1147             ## FIXME - what's a P4 projectName ?
1148             self.projectName = self.guessProjectName()
1149
1150             if not self.hasOrigin:
1151                 self.getBranchMapping();
1152             if self.verbose:
1153                 print "p4-git branches: %s" % self.p4BranchesInGit
1154                 print "initial parents: %s" % self.initialParents
1155             for b in self.p4BranchesInGit:
1156                 if b != "master":
1157
1158                     ## FIXME
1159                     b = b[len(self.projectName):]
1160                 self.createdBranches.add(b)
1161
1162         self.tz = "%+03d%02d" % (- time.timezone / 3600, ((- time.timezone % 3600) / 60))
1163
1164         importProcess = subprocess.Popen(["git", "fast-import"],
1165                                          stdin=subprocess.PIPE, stdout=subprocess.PIPE,
1166                                          stderr=subprocess.PIPE);
1167         self.gitOutput = importProcess.stdout
1168         self.gitStream = importProcess.stdin
1169         self.gitError = importProcess.stderr
1170
1171         if self.revision:
1172             print "Doing initial import of %s from revision %s" % (' '.join(self.depotPaths), self.revision)
1173
1174             details = { "user" : "git perforce import user", "time" : int(time.time()) }
1175             details["desc"] = ("Initial import of %s from the state at revision %s"
1176                                % (' '.join(self.depotPaths), self.revision))
1177             details["change"] = self.revision
1178             newestRevision = 0
1179
1180             fileCnt = 0
1181             for info in p4CmdList("files "
1182                                   +  ' '.join(["%s...%s"
1183                                                % (p, self.revision)
1184                                                for p in self.depotPaths])):
1185
1186                 if info['code'] == 'error':
1187                     sys.stderr.write("p4 returned an error: %s\n"
1188                                      % info['data'])
1189                     sys.exit(1)
1190
1191
1192                 change = int(info["change"])
1193                 if change > newestRevision:
1194                     newestRevision = change
1195
1196                 if info["action"] == "delete":
1197                     # don't increase the file cnt, otherwise details["depotFile123"] will have gaps!
1198                     #fileCnt = fileCnt + 1
1199                     continue
1200
1201                 for prop in ["depotFile", "rev", "action", "type" ]:
1202                     details["%s%s" % (prop, fileCnt)] = info[prop]
1203
1204                 fileCnt = fileCnt + 1
1205
1206             details["change"] = newestRevision
1207             self.updateOptionDict(details)
1208             try:
1209                 self.commit(details, self.extractFilesFromCommit(details), self.branch, self.depotPaths)
1210             except IOError:
1211                 print "IO error with git fast-import. Is your git version recent enough?"
1212                 print self.gitError.read()
1213
1214         else:
1215             changes = []
1216
1217             if len(self.changesFile) > 0:
1218                 output = open(self.changesFile).readlines()
1219                 changeSet = Set()
1220                 for line in output:
1221                     changeSet.add(int(line))
1222
1223                 for change in changeSet:
1224                     changes.append(change)
1225
1226                 changes.sort()
1227             else:
1228                 if self.verbose:
1229                     print "Getting p4 changes for %s...%s" % (', '.join(self.depotPaths),
1230                                                               self.changeRange)
1231                 assert self.depotPaths
1232                 output = read_pipe_lines("p4 changes " + ' '.join (["%s...%s" % (p, self.changeRange)
1233                                                                     for p in self.depotPaths]))
1234
1235                 for line in output:
1236                     changeNum = line.split(" ")[1]
1237                     changes.append(changeNum)
1238
1239                 changes.reverse()
1240
1241                 if len(self.maxChanges) > 0:
1242                     changes = changes[0:min(int(self.maxChanges), len(changes))]
1243
1244             if len(changes) == 0:
1245                 if not self.silent:
1246                     print "No changes to import!"
1247                 return True
1248
1249             self.updatedBranches = set()
1250
1251             cnt = 1
1252             for change in changes:
1253                 description = p4Cmd("describe %s" % change)
1254                 self.updateOptionDict(description)
1255
1256                 if not self.silent:
1257                     sys.stdout.write("\rImporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
1258                     sys.stdout.flush()
1259                 cnt = cnt + 1
1260
1261                 try:
1262                     if self.detectBranches:
1263                         branches = self.splitFilesIntoBranches(description)
1264                         for branch in branches.keys():
1265                             ## HACK  --hwn
1266                             branchPrefix = self.depotPaths[0] + branch + "/"
1267
1268                             parent = ""
1269
1270                             filesForCommit = branches[branch]
1271
1272                             if self.verbose:
1273                                 print "branch is %s" % branch
1274
1275                             self.updatedBranches.add(branch)
1276
1277                             if branch not in self.createdBranches:
1278                                 self.createdBranches.add(branch)
1279                                 parent = self.knownBranches[branch]
1280                                 if parent == branch:
1281                                     parent = ""
1282                                 elif self.verbose:
1283                                     print "parent determined through known branches: %s" % parent
1284
1285                             # main branch? use master
1286                             if branch == "main":
1287                                 branch = "master"
1288                             else:
1289
1290                                 ## FIXME
1291                                 branch = self.projectName + branch
1292
1293                             if parent == "main":
1294                                 parent = "master"
1295                             elif len(parent) > 0:
1296                                 ## FIXME
1297                                 parent = self.projectName + parent
1298
1299                             branch = self.refPrefix + branch
1300                             if len(parent) > 0:
1301                                 parent = self.refPrefix + parent
1302
1303                             if self.verbose:
1304                                 print "looking for initial parent for %s; current parent is %s" % (branch, parent)
1305
1306                             if len(parent) == 0 and branch in self.initialParents:
1307                                 parent = self.initialParents[branch]
1308                                 del self.initialParents[branch]
1309
1310                             self.commit(description, filesForCommit, branch, branchPrefix, parent)
1311                     else:
1312                         files = self.extractFilesFromCommit(description)
1313                         self.commit(description, files, self.branch, self.depotPaths,
1314                                     self.initialParent)
1315                         self.initialParent = ""
1316                 except IOError:
1317                     print self.gitError.read()
1318                     sys.exit(1)
1319
1320             if not self.silent:
1321                 print ""
1322                 if len(self.updatedBranches) > 0:
1323                     sys.stdout.write("Updated branches: ")
1324                     for b in self.updatedBranches:
1325                         sys.stdout.write("%s " % b)
1326                     sys.stdout.write("\n")
1327
1328
1329         self.gitStream.close()
1330         if importProcess.wait() != 0:
1331             die("fast-import failed: %s" % self.gitError.read())
1332         self.gitOutput.close()
1333         self.gitError.close()
1334
1335         return True
1336
1337 class P4Rebase(Command):
1338     def __init__(self):
1339         Command.__init__(self)
1340         self.options = [ ]
1341         self.description = ("Fetches the latest revision from perforce and "
1342                             + "rebases the current work (branch) against it")
1343         self.verbose = False
1344
1345     def run(self, args):
1346         sync = P4Sync()
1347         sync.run([])
1348         print "Rebasing the current branch"
1349         oldHead = read_pipe("git rev-parse HEAD").strip()
1350         system("git rebase p4")
1351         system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
1352         return True
1353
1354 class P4Clone(P4Sync):
1355     def __init__(self):
1356         P4Sync.__init__(self)
1357         self.description = "Creates a new git repository and imports from Perforce into it"
1358         self.usage = "usage: %prog [options] //depot/path[@revRange]"
1359         self.options.append(
1360             optparse.make_option("--destination", dest="cloneDestination",
1361                                  action='store', default=None,
1362                                  help="where to leave result of the clone"))
1363         self.cloneDestination = None
1364         self.needsGit = False
1365
1366     def defaultDestination(self, args):
1367         ## TODO: use common prefix of args?
1368         depotPath = args[0]
1369         depotDir = re.sub("(@[^@]*)$", "", depotPath)
1370         depotDir = re.sub("(#[^#]*)$", "", depotDir)
1371         depotDir = re.sub(r"\.\.\.$,", "", depotDir)
1372         depotDir = re.sub(r"/$", "", depotDir)
1373         return os.path.split(depotDir)[1]
1374
1375     def run(self, args):
1376         if len(args) < 1:
1377             return False
1378
1379         if self.keepRepoPath and not self.cloneDestination:
1380             sys.stderr.write("Must specify destination for --keep-path\n")
1381             sys.exit(1)
1382
1383         depotPaths = args
1384
1385         if not self.cloneDestination and len(depotPaths) > 1:
1386             self.cloneDestination = depotPaths[-1]
1387             depotPaths = depotPaths[:-1]
1388
1389         for p in depotPaths:
1390             if not p.startswith("//"):
1391                 return False
1392
1393         if not self.cloneDestination:
1394             self.cloneDestination = self.defaultDestination(args)
1395
1396         print "Importing from %s into %s" % (', '.join(depotPaths), self.cloneDestination)
1397         os.makedirs(self.cloneDestination)
1398         os.chdir(self.cloneDestination)
1399         system("git init")
1400         self.gitdir = os.getcwd() + "/.git"
1401         if not P4Sync.run(self, depotPaths):
1402             return False
1403         if self.branch != "master":
1404             if gitBranchExists("refs/remotes/p4/master"):
1405                 system("git branch master refs/remotes/p4/master")
1406                 system("git checkout -f")
1407             else:
1408                 print "Could not detect main branch. No checkout/master branch created."
1409
1410         return True
1411
1412 class HelpFormatter(optparse.IndentedHelpFormatter):
1413     def __init__(self):
1414         optparse.IndentedHelpFormatter.__init__(self)
1415
1416     def format_description(self, description):
1417         if description:
1418             return description + "\n"
1419         else:
1420             return ""
1421
1422 def printUsage(commands):
1423     print "usage: %s <command> [options]" % sys.argv[0]
1424     print ""
1425     print "valid commands: %s" % ", ".join(commands)
1426     print ""
1427     print "Try %s <command> --help for command specific help." % sys.argv[0]
1428     print ""
1429
1430 commands = {
1431     "debug" : P4Debug,
1432     "submit" : P4Submit,
1433     "sync" : P4Sync,
1434     "rebase" : P4Rebase,
1435     "clone" : P4Clone,
1436     "rollback" : P4RollBack
1437 }
1438
1439
1440 def main():
1441     if len(sys.argv[1:]) == 0:
1442         printUsage(commands.keys())
1443         sys.exit(2)
1444
1445     cmd = ""
1446     cmdName = sys.argv[1]
1447     try:
1448         klass = commands[cmdName]
1449         cmd = klass()
1450     except KeyError:
1451         print "unknown command %s" % cmdName
1452         print ""
1453         printUsage(commands.keys())
1454         sys.exit(2)
1455
1456     options = cmd.options
1457     cmd.gitdir = os.environ.get("GIT_DIR", None)
1458
1459     args = sys.argv[2:]
1460
1461     if len(options) > 0:
1462         options.append(optparse.make_option("--git-dir", dest="gitdir"))
1463
1464         parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
1465                                        options,
1466                                        description = cmd.description,
1467                                        formatter = HelpFormatter())
1468
1469         (cmd, args) = parser.parse_args(sys.argv[2:], cmd);
1470     global verbose
1471     verbose = cmd.verbose
1472     if cmd.needsGit:
1473         if cmd.gitdir == None:
1474             cmd.gitdir = os.path.abspath(".git")
1475             if not isValidGitDir(cmd.gitdir):
1476                 cmd.gitdir = read_pipe("git rev-parse --git-dir").strip()
1477                 if os.path.exists(cmd.gitdir):
1478                     cdup = read_pipe("git rev-parse --show-cdup").strip()
1479                     if len(cdup) > 0:
1480                         os.chdir(cdup);
1481
1482         if not isValidGitDir(cmd.gitdir):
1483             if isValidGitDir(cmd.gitdir + "/.git"):
1484                 cmd.gitdir += "/.git"
1485             else:
1486                 die("fatal: cannot locate git repository at %s" % cmd.gitdir)
1487
1488         os.environ["GIT_DIR"] = cmd.gitdir
1489
1490     if not cmd.run(args):
1491         parser.print_help()
1492
1493
1494 if __name__ == '__main__':
1495     main()