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
  14
  15 branch = "refs/heads/p4"
  16 prefix = os.popen("git-repo-config --get p4.depotpath").read()
  17 if len(prefix) != 0:
  18     prefix = prefix[:-1]
  19
  20 if len(sys.argv) == 1 and len(prefix) != 0:
  21     print "[using previously specified depot path %s]" % prefix
  22 elif len(sys.argv) != 2:
  23     print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  24     print "\n    example:"
  25     print "    %s //depot/my/project/ -- to import everything"
  26     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  27     print ""
  28     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  29     print ""
  30     sys.exit(1)
  31 else:
  32     if len(prefix) != 0 and prefix != sys.argv[1]:
  33         print "previous import used depot path %s and now %s was specified. this doesn't work!" % (prefix, sys.argv[1])
  34         sys.exit(1)
  35     prefix = sys.argv[1]
  36
  37 changeRange = ""
  38 revision = ""
  39 users = {}
  40 initialParent = ""
  41
  42 if prefix.find("@") != -1:
  43     atIdx = prefix.index("@")
  44     changeRange = prefix[atIdx:]
  45     if changeRange.find(",") == -1:
  46         revision = changeRange
  47         changeRange = ""
  48     prefix = prefix[0:atIdx]
  49 elif prefix.find("#") != -1:
  50     hashIdx = prefix.index("#")
  51     revision = prefix[hashIdx:]
  52     prefix = prefix[0:hashIdx]
  53
  54 if prefix.endswith("..."):
  55     prefix = prefix[:-3]
  56
  57 if not prefix.endswith("/"):
  58     prefix += "/"
  59
  60 def p4CmdList(cmd):
  61     pipe = os.popen("p4 -G %s" % cmd, "rb")
  62     result = []
  63     try:
  64         while True:
  65             entry = marshal.load(pipe)
  66             result.append(entry)
  67     except EOFError:
  68         pass
  69     pipe.close()
  70     return result
  71
  72 def p4Cmd(cmd):
  73     list = p4CmdList(cmd)
  74     result = {}
  75     for entry in list:
  76         result.update(entry)
  77     return result;
  78
  79 def commit(details):
  80     global initialParent
  81     global users
  82
  83     epoch = details["time"]
  84     author = details["user"]
  85
  86     gitStream.write("commit %s\n" % branch)
  87     committer = ""
  88     if author in users:
  89         committer = "%s %s %s" % (users[author], epoch, tz)
  90     else:
  91         committer = "%s <a@b> %s %s" % (author, epoch, tz)
  92
  93     gitStream.write("committer %s\n" % committer)
  94
  95     gitStream.write("data <<EOT\n")
  96     gitStream.write(details["desc"])
  97     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
  98     gitStream.write("EOT\n\n")
  99
 100     if len(initialParent) > 0:
 101         gitStream.write("from %s\n" % initialParent)
 102         initialParent = ""
 103
 104     fnum = 0
 105     while details.has_key("depotFile%s" % fnum):
 106         path = details["depotFile%s" % fnum]
 107         if not path.startswith(prefix):
 108             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 109             fnum = fnum + 1
 110             continue
 111
 112         rev = details["rev%s" % fnum]
 113         depotPath = path + "#" + rev
 114         relPath = path[len(prefix):]
 115         action = details["action%s" % fnum]
 116
 117         if action == "delete":
 118             gitStream.write("D %s\n" % relPath)
 119         else:
 120             mode = 644
 121             if details["type%s" % fnum].startswith("x"):
 122                 mode = 755
 123
 124             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 125
 126             gitStream.write("M %s inline %s\n" % (mode, relPath))
 127             gitStream.write("data %s\n" % len(data))
 128             gitStream.write(data)
 129             gitStream.write("\n")
 130
 131         fnum = fnum + 1
 132
 133     gitStream.write("\n")
 134
 135     gitStream.write("tag p4/%s\n" % details["change"])
 136     gitStream.write("from %s\n" % branch);
 137     gitStream.write("tagger %s\n" % committer);
 138     gitStream.write("data 0\n\n")
 139
 140
 141 def getUserMap():
 142     users = {}
 143
 144     for output in p4CmdList("users"):
 145         if not output.has_key("User"):
 146             continue
 147         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 148     return users
 149
 150 users = getUserMap()
 151
 152 if len(changeRange) == 0:
 153     try:
 154         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 155         output = sout.read()
 156         tagIdx = output.index(" tags/p4/")
 157         caretIdx = output.index("^")
 158         rev = int(output[tagIdx + 9 : caretIdx]) + 1
 159         changeRange = "@%s,#head" % rev
 160         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 161     except:
 162         pass
 163
 164 sys.stderr.write("\n")
 165
 166 tz = - time.timezone / 36
 167 tzsign = ("%s" % tz)[0]
 168 if tzsign != '+' and tzsign != '-':
 169     tz = "+" + ("%s" % tz)
 170
 171 if len(revision) > 0:
 172     print "Doing initial import of %s from revision %s" % (prefix, revision)
 173
 174     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 175     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 176     details["change"] = revision
 177     newestRevision = 0
 178
 179     fileCnt = 0
 180     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 181         change = info["change"]
 182         if change > newestRevision:
 183             newestRevision = change
 184
 185         if info["action"] == "delete":
 186             continue
 187
 188         for prop in [ "depotFile", "rev", "action", "type" ]:
 189             details["%s%s" % (prop, fileCnt)] = info[prop]
 190
 191         fileCnt = fileCnt + 1
 192
 193     details["change"] = newestRevision
 194
 195     gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 196     try:
 197         commit(details)
 198     except:
 199         print gitError.read()
 200
 201     gitStream.close()
 202     gitOutput.close()
 203     gitError.close()
 204 else:
 205     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 206
 207     changes = []
 208     for line in output:
 209         changeNum = line.split(" ")[1]
 210         changes.append(changeNum)
 211
 212     changes.reverse()
 213
 214     if len(changes) == 0:
 215         print "no changes to import!"
 216         sys.exit(1)
 217
 218     gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 219
 220     cnt = 1
 221     for change in changes:
 222         description = p4Cmd("describe %s" % change)
 223
 224         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 225         sys.stdout.flush()
 226         cnt = cnt + 1
 227
 228         commit(description)
 229
 230     gitStream.close()
 231     gitOutput.close()
 232     gitError.close()
 233
 234 print ""
 235
 236 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 237