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 #
  12 import os, string, sys, time
  13 import marshal, popen2, getopt
  14
  15 branch = "refs/heads/master"
  16 prefix = previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
  17 if len(prefix) != 0:
  18     prefix = prefix[:-1]
  19
  20 try:
  21     opts, args = getopt.getopt(sys.argv[1:], "", [ "branch=" ])
  22 except getopt.GetoptError:
  23     print "fixme, syntax error"
  24     sys.exit(1)
  25
  26 for o, a in opts:
  27     if o == "--branch":
  28         branch = "refs/heads/" + a
  29
  30 if len(args) == 0 and len(prefix) != 0:
  31     print "[using previously specified depot path %s]" % prefix
  32 elif len(args) != 1:
  33     print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  34     print "\n    example:"
  35     print "    %s //depot/my/project/ -- to import the current head"
  36     print "    %s //depot/my/project/@all -- to import everything"
  37     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  38     print ""
  39     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  40     print ""
  41     sys.exit(1)
  42 else:
  43     if len(prefix) != 0 and prefix != args[0]:
  44         print "previous import used depot path %s and now %s was specified. this doesn't work!" % (prefix, args[0])
  45         sys.exit(1)
  46     prefix = args[0]
  47
  48 changeRange = ""
  49 revision = ""
  50 users = {}
  51 initialParent = ""
  52 lastChange = ""
  53 lastCommitter = ""
  54 initialTag = ""
  55
  56 if prefix.find("@") != -1:
  57     atIdx = prefix.index("@")
  58     changeRange = prefix[atIdx:]
  59     if changeRange == "@all":
  60         changeRange = ""
  61     elif changeRange.find(",") == -1:
  62         revision = changeRange
  63         changeRange = ""
  64     prefix = prefix[0:atIdx]
  65 elif prefix.find("#") != -1:
  66     hashIdx = prefix.index("#")
  67     revision = prefix[hashIdx:]
  68     prefix = prefix[0:hashIdx]
  69 elif len(previousDepotPath) == 0:
  70     revision = "#head"
  71
  72 if prefix.endswith("..."):
  73     prefix = prefix[:-3]
  74
  75 if not prefix.endswith("/"):
  76     prefix += "/"
  77
  78 def p4CmdList(cmd):
  79     pipe = os.popen("p4 -G %s" % cmd, "rb")
  80     result = []
  81     try:
  82         while True:
  83             entry = marshal.load(pipe)
  84             result.append(entry)
  85     except EOFError:
  86         pass
  87     pipe.close()
  88     return result
  89
  90 def p4Cmd(cmd):
  91     list = p4CmdList(cmd)
  92     result = {}
  93     for entry in list:
  94         result.update(entry)
  95     return result;
  96
  97 def commit(details):
  98     global initialParent
  99     global users
 100     global lastChange
 101     global lastCommitter
 102
 103     epoch = details["time"]
 104     author = details["user"]
 105
 106     gitStream.write("commit %s\n" % branch)
 107     committer = ""
 108     if author in users:
 109         committer = "%s %s %s" % (users[author], epoch, tz)
 110     else:
 111         committer = "%s <a@b> %s %s" % (author, epoch, tz)
 112
 113     gitStream.write("committer %s\n" % committer)
 114
 115     gitStream.write("data <<EOT\n")
 116     gitStream.write(details["desc"])
 117     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
 118     gitStream.write("EOT\n\n")
 119
 120     if len(initialParent) > 0:
 121         gitStream.write("from %s\n" % initialParent)
 122         initialParent = ""
 123
 124     fnum = 0
 125     while details.has_key("depotFile%s" % fnum):
 126         path = details["depotFile%s" % fnum]
 127         if not path.startswith(prefix):
 128             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 129             fnum = fnum + 1
 130             continue
 131
 132         rev = details["rev%s" % fnum]
 133         depotPath = path + "#" + rev
 134         relPath = path[len(prefix):]
 135         action = details["action%s" % fnum]
 136
 137         if action == "delete":
 138             gitStream.write("D %s\n" % relPath)
 139         else:
 140             mode = 644
 141             if details["type%s" % fnum].startswith("x"):
 142                 mode = 755
 143
 144             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 145
 146             gitStream.write("M %s inline %s\n" % (mode, relPath))
 147             gitStream.write("data %s\n" % len(data))
 148             gitStream.write(data)
 149             gitStream.write("\n")
 150
 151         fnum = fnum + 1
 152
 153     gitStream.write("\n")
 154
 155     lastChange = details["change"]
 156     lastCommitter = committer
 157
 158 def getUserMap():
 159     users = {}
 160
 161     for output in p4CmdList("users"):
 162         if not output.has_key("User"):
 163             continue
 164         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 165     return users
 166
 167 users = getUserMap()
 168
 169 if len(changeRange) == 0:
 170     try:
 171         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 172         output = sout.read()
 173         if output.endswith("\n"):
 174             output = output[:-1]
 175         tagIdx = output.index(" tags/p4/")
 176         caretIdx = output.find("^")
 177         endPos = len(output)
 178         if caretIdx != -1:
 179             endPos = caretIdx
 180         rev = int(output[tagIdx + 9 : endPos]) + 1
 181         changeRange = "@%s,#head" % rev
 182         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 183         initialTag = "p4/%s" % (int(rev) - 1)
 184     except:
 185         pass
 186
 187 sys.stderr.write("\n")
 188
 189 tz = - time.timezone / 36
 190 tzsign = ("%s" % tz)[0]
 191 if tzsign != '+' and tzsign != '-':
 192     tz = "+" + ("%s" % tz)
 193
 194 gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 195
 196 if len(revision) > 0:
 197     print "Doing initial import of %s from revision %s" % (prefix, revision)
 198
 199     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 200     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 201     details["change"] = revision
 202     newestRevision = 0
 203
 204     fileCnt = 0
 205     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 206         change = int(info["change"])
 207         if change > newestRevision:
 208             newestRevision = change
 209
 210         if info["action"] == "delete":
 211             continue
 212
 213         for prop in [ "depotFile", "rev", "action", "type" ]:
 214             details["%s%s" % (prop, fileCnt)] = info[prop]
 215
 216         fileCnt = fileCnt + 1
 217
 218     details["change"] = newestRevision
 219
 220     try:
 221         commit(details)
 222     except:
 223         print gitError.read()
 224
 225 else:
 226     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 227
 228     changes = []
 229     for line in output:
 230         changeNum = line.split(" ")[1]
 231         changes.append(changeNum)
 232
 233     changes.reverse()
 234
 235     if len(changes) == 0:
 236         print "no changes to import!"
 237         sys.exit(1)
 238
 239     cnt = 1
 240     for change in changes:
 241         description = p4Cmd("describe %s" % change)
 242
 243         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 244         sys.stdout.flush()
 245         cnt = cnt + 1
 246
 247         try:
 248             commit(description)
 249         except:
 250             print gitError.read()
 251             sys.exit(1)
 252
 253 print ""
 254
 255 gitStream.write("reset refs/tags/p4/%s\n" % lastChange)
 256 gitStream.write("from %s\n\n" % branch);
 257
 258
 259 gitStream.close()
 260 gitOutput.close()
 261 gitError.close()
 262
 263 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 264 if len(initialTag) > 0:
 265     os.popen("git tag -d %s" % initialTag).read()
 266
 267 sys.exit(0)