Andrew's git - gitweb.git/blob - contrib/fast-import/p4-fast-export.py

   1#!/usr/bin/python
   2#
   3# p4-fast-export.py
   4#
   5# Author: Simon Hausmann <hausmann@kde.org>
   6# License: MIT <http://www.opensource.org/licenses/mit-license.php>
   7#
   8# TODO:
   9#       - support integrations (at least p4i)
  10#       - support p4 submit (hah!)
  11#
  12import os, string, sys, time
  13import marshal, popen2, getopt
  14
  15knownBranches = set()
  16committedChanges = set()
  17branch = "refs/heads/master"
  18globalPrefix = previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
  19detectBranches = False
  20changesFile = ""
  21if len(globalPrefix) != 0:
  22    globalPrefix = globalPrefix[:-1]
  23
  24try:
  25    opts, args = getopt.getopt(sys.argv[1:], "", [ "branch=", "detect-branches", "changesfile=" ])
  26except getopt.GetoptError:
  27    print "fixme, syntax error"
  28    sys.exit(1)
  29
  30for o, a in opts:
  31    if o == "--branch":
  32        branch = "refs/heads/" + a
  33    elif o == "--detect-branches":
  34        detectBranches = True
  35    elif o == "--changesfile":
  36        changesFile = a
  37
  38if len(args) == 0 and len(globalPrefix) != 0:
  39    print "[using previously specified depot path %s]" % globalPrefix
  40elif len(args) != 1:
  41    print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  42    print "\n    example:"
  43    print "    %s //depot/my/project/ -- to import the current head"
  44    print "    %s //depot/my/project/@all -- to import everything"
  45    print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  46    print ""
  47    print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  48    print ""
  49    sys.exit(1)
  50else:
  51    if len(globalPrefix) != 0 and globalPrefix != args[0]:
  52        print "previous import used depot path %s and now %s was specified. this doesn't work!" % (globalPrefix, args[0])
  53        sys.exit(1)
  54    globalPrefix = args[0]
  55
  56changeRange = ""
  57revision = ""
  58users = {}
  59initialParent = ""
  60lastChange = 0
  61initialTag = ""
  62
  63if globalPrefix.find("@") != -1:
  64    atIdx = globalPrefix.index("@")
  65    changeRange = globalPrefix[atIdx:]
  66    if changeRange == "@all":
  67        changeRange = ""
  68    elif changeRange.find(",") == -1:
  69        revision = changeRange
  70        changeRange = ""
  71    globalPrefix = globalPrefix[0:atIdx]
  72elif globalPrefix.find("#") != -1:
  73    hashIdx = globalPrefix.index("#")
  74    revision = globalPrefix[hashIdx:]
  75    globalPrefix = globalPrefix[0:hashIdx]
  76elif len(previousDepotPath) == 0:
  77    revision = "#head"
  78
  79if globalPrefix.endswith("..."):
  80    globalPrefix = globalPrefix[:-3]
  81
  82if not globalPrefix.endswith("/"):
  83    globalPrefix += "/"
  84
  85def p4CmdList(cmd):
  86    pipe = os.popen("p4 -G %s" % cmd, "rb")
  87    result = []
  88    try:
  89        while True:
  90            entry = marshal.load(pipe)
  91            result.append(entry)
  92    except EOFError:
  93        pass
  94    pipe.close()
  95    return result
  96
  97def p4Cmd(cmd):
  98    list = p4CmdList(cmd)
  99    result = {}
 100    for entry in list:
 101        result.update(entry)
 102    return result;
 103
 104def extractFilesFromCommit(commit):
 105    files = []
 106    fnum = 0
 107    while commit.has_key("depotFile%s" % fnum):
 108        path =  commit["depotFile%s" % fnum]
 109        if not path.startswith(globalPrefix):
 110            print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, globalPrefix, change)
 111            fnum = fnum + 1
 112            continue
 113
 114        file = {}
 115        file["path"] = path
 116        file["rev"] = commit["rev%s" % fnum]
 117        file["action"] = commit["action%s" % fnum]
 118        file["type"] = commit["type%s" % fnum]
 119        files.append(file)
 120        fnum = fnum + 1
 121    return files
 122
 123def isSubPathOf(first, second):
 124    if not first.startswith(second):
 125        return False
 126    if first == second:
 127        return True
 128    return first[len(second)] == "/"
 129
 130def branchesForCommit(files):
 131    global knownBranches
 132    branches = set()
 133
 134    for file in files:
 135        relativePath = file["path"][len(globalPrefix):]
 136        # strip off the filename
 137        relativePath = relativePath[0:relativePath.rfind("/")]
 138
 139#        if len(branches) == 0:
 140#            branches.add(relativePath)
 141#            knownBranches.add(relativePath)
 142#            continue
 143
 144        ###### this needs more testing :)
 145        knownBranch = False
 146        for branch in branches:
 147            if relativePath == branch:
 148                knownBranch = True
 149                break
 150#            if relativePath.startswith(branch):
 151            if isSubPathOf(relativePath, branch):
 152                knownBranch = True
 153                break
 154#            if branch.startswith(relativePath):
 155            if isSubPathOf(branch, relativePath):
 156                branches.remove(branch)
 157                break
 158
 159        if knownBranch:
 160            continue
 161
 162        for branch in knownBranches:
 163            #if relativePath.startswith(branch):
 164            if isSubPathOf(relativePath, branch):
 165                if len(branches) == 0:
 166                    relativePath = branch
 167                else:
 168                    knownBranch = True
 169                break
 170
 171        if knownBranch:
 172            continue
 173
 174        branches.add(relativePath)
 175        knownBranches.add(relativePath)
 176
 177    return branches
 178
 179def commit(details, files, branch, branchPrefix):
 180    global initialParent
 181    global users
 182    global lastChange
 183    global committedChanges
 184
 185    epoch = details["time"]
 186    author = details["user"]
 187
 188    gitStream.write("commit %s\n" % branch)
 189    gitStream.write("mark :%s\n" % details["change"])
 190    committedChanges.add(int(details["change"]))
 191    committer = ""
 192    if author in users:
 193        committer = "%s %s %s" % (users[author], epoch, tz)
 194    else:
 195        committer = "%s <a@b> %s %s" % (author, epoch, tz)
 196
 197    gitStream.write("committer %s\n" % committer)
 198
 199    gitStream.write("data <<EOT\n")
 200    gitStream.write(details["desc"])
 201    gitStream.write("\n[ imported from %s; change %s ]\n" % (branchPrefix, details["change"]))
 202    gitStream.write("EOT\n\n")
 203
 204    if len(initialParent) > 0:
 205        gitStream.write("from %s\n" % initialParent)
 206        initialParent = ""
 207
 208    #mergedBranches = set()
 209    merges = set()
 210
 211    for file in files:
 212        if lastChange == 0:
 213            continue
 214        path = file["path"]
 215        if not path.startswith(branchPrefix):
 216            continue
 217        action = file["action"]
 218        if action != "integrate" and action != "branch":
 219            continue
 220        rev = file["rev"]
 221        depotPath = path + "#" + rev
 222
 223        log = p4CmdList("filelog \"%s\"" % depotPath)
 224        if len(log) != 1:
 225            print "eek! I got confused by the filelog of %s" % depotPath
 226            sys.exit(1);
 227
 228        log = log[0]
 229        if log["action0"] != action:
 230            print "eek! wrong action in filelog for %s : found %s, expected %s" % (depotPath, log["action0"], action)
 231            sys.exit(1);
 232
 233        branchAction = log["how0,0"]
 234#        if branchAction == "branch into" or branchAction == "ignored":
 235#            continue # ignore for branching
 236
 237        if not branchAction.endswith(" from"):
 238            continue # ignore for branching
 239#            print "eek! file %s was not branched from but instead: %s" % (depotPath, branchAction)
 240#            sys.exit(1);
 241
 242        source = log["file0,0"]
 243        if source.startswith(branchPrefix):
 244            continue
 245
 246        lastSourceRev = log["erev0,0"]
 247
 248        sourceLog = p4CmdList("filelog -m 1 \"%s%s\"" % (source, lastSourceRev))
 249        if len(sourceLog) != 1:
 250            print "eek! I got confused by the source filelog of %s%s" % (source, lastSourceRev)
 251            sys.exit(1);
 252        sourceLog = sourceLog[0]
 253
 254        change = int(sourceLog["change0"])
 255        merges.add(change)
 256
 257#        relPath = source[len(globalPrefix):]
 258#
 259#        for branch in knownBranches:
 260#            if relPath.startswith(branch) and branch not in mergedBranches:
 261#                gitStream.write("merge refs/heads/%s\n" % branch)
 262#                mergedBranches.add(branch)
 263#                break
 264
 265    for merge in merges:
 266        if merge in committedChanges:
 267            gitStream.write("merge :%s\n" % merge)
 268
 269    for file in files:
 270        path = file["path"]
 271        if not path.startswith(branchPrefix):
 272            print "\nchanged files: ignoring path %s outside of branch prefix %s in change %s" % (path, branchPrefix, details["change"])
 273            continue
 274        rev = file["rev"]
 275        depotPath = path + "#" + rev
 276        relPath = path[len(branchPrefix):]
 277        action = file["action"]
 278
 279        if action == "delete":
 280            gitStream.write("D %s\n" % relPath)
 281        else:
 282            mode = 644
 283            if file["type"].startswith("x"):
 284                mode = 755
 285
 286            data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 287
 288            gitStream.write("M %s inline %s\n" % (mode, relPath))
 289            gitStream.write("data %s\n" % len(data))
 290            gitStream.write(data)
 291            gitStream.write("\n")
 292
 293    gitStream.write("\n")
 294
 295    lastChange = int(details["change"])
 296
 297def getUserMap():
 298    users = {}
 299
 300    for output in p4CmdList("users"):
 301        if not output.has_key("User"):
 302            continue
 303        users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 304    return users
 305
 306users = getUserMap()
 307
 308if len(changeRange) == 0:
 309    try:
 310        sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 311        output = sout.read()
 312        if output.endswith("\n"):
 313            output = output[:-1]
 314        tagIdx = output.index(" tags/p4/")
 315        caretIdx = output.find("^")
 316        endPos = len(output)
 317        if caretIdx != -1:
 318            endPos = caretIdx
 319        rev = int(output[tagIdx + 9 : endPos]) + 1
 320        changeRange = "@%s,#head" % rev
 321        initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 322        initialTag = "p4/%s" % (int(rev) - 1)
 323    except:
 324        pass
 325
 326sys.stderr.write("\n")
 327
 328tz = - time.timezone / 36
 329tzsign = ("%s" % tz)[0]
 330if tzsign != '+' and tzsign != '-':
 331    tz = "+" + ("%s" % tz)
 332
 333gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 334
 335if len(revision) > 0:
 336    print "Doing initial import of %s from revision %s" % (globalPrefix, revision)
 337
 338    details = { "user" : "git perforce import user", "time" : int(time.time()) }
 339    details["desc"] = "Initial import of %s from the state at revision %s" % (globalPrefix, revision)
 340    details["change"] = revision
 341    newestRevision = 0
 342
 343    fileCnt = 0
 344    for info in p4CmdList("files %s...%s" % (globalPrefix, revision)):
 345        change = int(info["change"])
 346        if change > newestRevision:
 347            newestRevision = change
 348
 349        if info["action"] == "delete":
 350            continue
 351
 352        for prop in [ "depotFile", "rev", "action", "type" ]:
 353            details["%s%s" % (prop, fileCnt)] = info[prop]
 354
 355        fileCnt = fileCnt + 1
 356
 357    details["change"] = newestRevision
 358
 359    try:
 360        commit(details, extractFilesFromCommit(details), branch, globalPrefix)
 361    except:
 362        print gitError.read()
 363
 364else:
 365    changes = []
 366
 367    if len(changesFile) > 0:
 368        output = open(changesFile).readlines()
 369        changeSet = set()
 370        for line in output:
 371            changeSet.add(int(line))
 372
 373        for change in changeSet:
 374            changes.append(change)
 375
 376        changes.sort()
 377    else:
 378        output = os.popen("p4 changes %s...%s" % (globalPrefix, changeRange)).readlines()
 379
 380        for line in output:
 381            changeNum = line.split(" ")[1]
 382            changes.append(changeNum)
 383
 384        changes.reverse()
 385
 386    if len(changes) == 0:
 387        print "no changes to import!"
 388        sys.exit(1)
 389
 390    cnt = 1
 391    for change in changes:
 392        description = p4Cmd("describe %s" % change)
 393
 394        sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 395        sys.stdout.flush()
 396        cnt = cnt + 1
 397
 398#        try:
 399        files = extractFilesFromCommit(description)
 400        if detectBranches:
 401            for branch in branchesForCommit(files):
 402                knownBranches.add(branch)
 403                branchPrefix = globalPrefix + branch + "/"
 404                branch = "refs/heads/" + branch
 405                commit(description, files, branch, branchPrefix)
 406        else:
 407            commit(description, files, branch, globalPrefix)
 408#        except:
 409#            print gitError.read()
 410#            sys.exit(1)
 411
 412print ""
 413
 414gitStream.write("reset refs/tags/p4/%s\n" % lastChange)
 415gitStream.write("from %s\n\n" % branch);
 416
 417
 418gitStream.close()
 419gitOutput.close()
 420gitError.close()
 421
 422os.popen("git-repo-config p4.depotpath %s" % globalPrefix).read()
 423if len(initialTag) > 0:
 424    os.popen("git tag -d %s" % initialTag).read()
 425
 426sys.exit(0)