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 incremental imports
  11 #       - create tags
  12 #       - instead of reading all files into a variable try to pipe from
  13 #       - support p4 submit (hah!)
  14 #       - don't hardcode the import to master
  15 #
  16 import os, string, sys, time
  17 import marshal, popen2
  18
  19 if len(sys.argv) != 2:
  20     print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  21     print "\n    example:"
  22     print "    %s //depot/my/project/ -- to import everything"
  23     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  24     print ""
  25     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  26     print ""
  27     sys.exit(1)
  28
  29 prefix = sys.argv[1]
  30 changeRange = ""
  31 try:
  32     atIdx = prefix.index("@")
  33     changeRange = prefix[atIdx:]
  34     prefix = prefix[0:atIdx]
  35 except ValueError:
  36     changeRange = ""
  37
  38 if not prefix.endswith("/"):
  39     prefix += "/"
  40
  41 def p4CmdList(cmd):
  42     pipe = os.popen("p4 -G %s" % cmd, "rb")
  43     result = []
  44     try:
  45         while True:
  46             entry = marshal.load(pipe)
  47             result.append(entry)
  48     except EOFError:
  49         pass
  50     pipe.close()
  51     return result
  52
  53 def p4Cmd(cmd):
  54     list = p4CmdList(cmd)
  55     result = {}
  56     for entry in list:
  57         result.update(entry)
  58     return result;
  59
  60 def getUserMap():
  61     users = {}
  62
  63     for output in p4CmdList("users"):
  64         if not output.has_key("User"):
  65             continue
  66         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
  67     return users
  68
  69 users = getUserMap()
  70
  71 output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
  72
  73 changes = []
  74 for line in output:
  75     changeNum = line.split(" ")[1]
  76     changes.append(changeNum)
  77
  78 changes.reverse()
  79
  80 sys.stderr.write("\n")
  81
  82 tz = - time.timezone / 36
  83
  84 gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
  85
  86 cnt = 1
  87 for change in changes:
  88     description = p4Cmd("describe %s" % change)
  89
  90     sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
  91     cnt = cnt + 1
  92
  93     epoch = description["time"]
  94     author = description["user"]
  95
  96     gitStream.write("commit refs/heads/master\n")
  97     if author in users:
  98         gitStream.write("committer %s %s %s\n" % (users[author], epoch, tz))
  99     else:
 100         gitStream.write("committer %s <a@b> %s %s\n" % (author, epoch, tz))
 101     gitStream.write("data <<EOT\n")
 102     gitStream.write(description["desc"])
 103     gitStream.write("EOT\n\n")
 104
 105     fnum = 0
 106     while description.has_key("depotFile%s" % fnum):
 107         path = description["depotFile%s" % fnum]
 108         if not path.startswith(prefix):
 109             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 110             fnum = fnum + 1
 111             continue
 112
 113         rev = description["rev%s" % fnum]
 114         depotPath = path + "#" + rev
 115         relPath = path[len(prefix):]
 116         action = description["action%s" % fnum]
 117
 118         if action == "delete":
 119             gitStream.write("D %s\n" % relPath)
 120         else:
 121             mode = 644
 122             if description["type%s" % fnum].startswith("x"):
 123                 mode = 755
 124
 125             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 126
 127             gitStream.write("M %s inline %s\n" % (mode, relPath))
 128             gitStream.write("data %s\n" % len(data))
 129             gitStream.write(data)
 130             gitStream.write("\n")
 131
 132         fnum = fnum + 1
 133
 134     gitStream.write("\n")
 135
 136 gitStream.close()
 137 gitOutput.close()
 138 gitError.close()
 139
 140 print ""