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/p4"
  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
  53 if prefix.find("@") != -1:
  54     atIdx = prefix.index("@")
  55     changeRange = prefix[atIdx:]
  56     if changeRange == "@all":
  57         changeRange = ""
  58     elif changeRange.find(",") == -1:
  59         revision = changeRange
  60         changeRange = ""
  61     prefix = prefix[0:atIdx]
  62 elif prefix.find("#") != -1:
  63     hashIdx = prefix.index("#")
  64     revision = prefix[hashIdx:]
  65     prefix = prefix[0:hashIdx]
  66 elif len(previousDepotPath) == 0:
  67     revision = "#head"
  68
  69 if prefix.endswith("..."):
  70     prefix = prefix[:-3]
  71
  72 if not prefix.endswith("/"):
  73     prefix += "/"
  74
  75 def p4CmdList(cmd):
  76     pipe = os.popen("p4 -G %s" % cmd, "rb")
  77     result = []
  78     try:
  79         while True:
  80             entry = marshal.load(pipe)
  81             result.append(entry)
  82     except EOFError:
  83         pass
  84     pipe.close()
  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 commit(details):
  95     global initialParent
  96     global users
  97
  98     epoch = details["time"]
  99     author = details["user"]
 100
 101     gitStream.write("commit %s\n" % branch)
 102     committer = ""
 103     if author in users:
 104         committer = "%s %s %s" % (users[author], epoch, tz)
 105     else:
 106         committer = "%s <a@b> %s %s" % (author, epoch, tz)
 107
 108     gitStream.write("committer %s\n" % committer)
 109
 110     gitStream.write("data <<EOT\n")
 111     gitStream.write(details["desc"])
 112     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
 113     gitStream.write("EOT\n\n")
 114
 115     if len(initialParent) > 0:
 116         gitStream.write("from %s\n" % initialParent)
 117         initialParent = ""
 118
 119     fnum = 0
 120     while details.has_key("depotFile%s" % fnum):
 121         path = details["depotFile%s" % fnum]
 122         if not path.startswith(prefix):
 123             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 124             fnum = fnum + 1
 125             continue
 126
 127         rev = details["rev%s" % fnum]
 128         depotPath = path + "#" + rev
 129         relPath = path[len(prefix):]
 130         action = details["action%s" % fnum]
 131
 132         if action == "delete":
 133             gitStream.write("D %s\n" % relPath)
 134         else:
 135             mode = 644
 136             if details["type%s" % fnum].startswith("x"):
 137                 mode = 755
 138
 139             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 140
 141             gitStream.write("M %s inline %s\n" % (mode, relPath))
 142             gitStream.write("data %s\n" % len(data))
 143             gitStream.write(data)
 144             gitStream.write("\n")
 145
 146         fnum = fnum + 1
 147
 148     gitStream.write("\n")
 149
 150     gitStream.write("tag p4/%s\n" % details["change"])
 151     gitStream.write("from %s\n" % branch);
 152     gitStream.write("tagger %s\n" % committer);
 153     gitStream.write("data 0\n\n")
 154
 155
 156 def getUserMap():
 157     users = {}
 158
 159     for output in p4CmdList("users"):
 160         if not output.has_key("User"):
 161             continue
 162         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 163     return users
 164
 165 users = getUserMap()
 166
 167 if len(changeRange) == 0:
 168     try:
 169         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 170         output = sout.read()
 171         tagIdx = output.index(" tags/p4/")
 172         caretIdx = output.index("^")
 173         rev = int(output[tagIdx + 9 : caretIdx]) + 1
 174         changeRange = "@%s,#head" % rev
 175         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 176     except:
 177         pass
 178
 179 sys.stderr.write("\n")
 180
 181 tz = - time.timezone / 36
 182 tzsign = ("%s" % tz)[0]
 183 if tzsign != '+' and tzsign != '-':
 184     tz = "+" + ("%s" % tz)
 185
 186 gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 187
 188 if len(revision) > 0:
 189     print "Doing initial import of %s from revision %s" % (prefix, revision)
 190
 191     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 192     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 193     details["change"] = revision
 194     newestRevision = 0
 195
 196     fileCnt = 0
 197     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 198         change = int(info["change"])
 199         if change > newestRevision:
 200             newestRevision = change
 201
 202         if info["action"] == "delete":
 203             continue
 204
 205         for prop in [ "depotFile", "rev", "action", "type" ]:
 206             details["%s%s" % (prop, fileCnt)] = info[prop]
 207
 208         fileCnt = fileCnt + 1
 209
 210     details["change"] = newestRevision
 211
 212     try:
 213         commit(details)
 214     except:
 215         print gitError.read()
 216
 217 else:
 218     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 219
 220     changes = []
 221     for line in output:
 222         changeNum = line.split(" ")[1]
 223         changes.append(changeNum)
 224
 225     changes.reverse()
 226
 227     if len(changes) == 0:
 228         print "no changes to import!"
 229         sys.exit(1)
 230
 231     cnt = 1
 232     for change in changes:
 233         description = p4Cmd("describe %s" % change)
 234
 235         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 236         sys.stdout.flush()
 237         cnt = cnt + 1
 238
 239         try:
 240             commit(description)
 241         except:
 242             print gitError.read()
 243             sys.exit(1)
 244
 245 print ""
 246
 247 gitStream.close()
 248 gitOutput.close()
 249 gitError.close()
 250
 251 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 252
 253 sys.exit(0)