Andrew's git - gitweb.git/blob

8455c1f41c4b0e65846e408904b0d8207d91d288
   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
  14
  15if len(sys.argv) != 2:
  16    print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  17    print "\n    example:"
  18    print "    %s //depot/my/project/ -- to import everything"
  19    print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  20    print ""
  21    print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  22    print ""
  23    sys.exit(1)
  24
  25branch = "refs/heads/p4"
  26prefix = sys.argv[1]
  27changeRange = ""
  28users = {}
  29initialParent = ""
  30
  31try:
  32    atIdx = prefix.index("@")
  33    changeRange = prefix[atIdx:]
  34    prefix = prefix[0:atIdx]
  35except ValueError:
  36    changeRange = ""
  37
  38if prefix.endswith("..."):
  39    prefix = prefix[:-3]
  40
  41if not prefix.endswith("/"):
  42    prefix += "/"
  43
  44def p4CmdList(cmd):
  45    pipe = os.popen("p4 -G %s" % cmd, "rb")
  46    result = []
  47    try:
  48        while True:
  49            entry = marshal.load(pipe)
  50            result.append(entry)
  51    except EOFError:
  52        pass
  53    pipe.close()
  54    return result
  55
  56def p4Cmd(cmd):
  57    list = p4CmdList(cmd)
  58    result = {}
  59    for entry in list:
  60        result.update(entry)
  61    return result;
  62
  63def commit(details):
  64    global initialParent
  65    global users
  66
  67    epoch = details["time"]
  68    author = details["user"]
  69
  70    gitStream.write("commit %s\n" % branch)
  71    committer = ""
  72    if author in users:
  73        committer = "%s %s %s" % (users[author], epoch, tz)
  74    else:
  75        committer = "%s <a@b> %s %s" % (author, epoch, tz)
  76
  77    gitStream.write("committer %s\n" % committer)
  78
  79    gitStream.write("data <<EOT\n")
  80    gitStream.write(details["desc"])
  81    gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, change))
  82    gitStream.write("EOT\n\n")
  83
  84    if len(initialParent) > 0:
  85        gitStream.write("merge %s\n" % initialParent)
  86        initialParent = ""
  87
  88    fnum = 0
  89    while details.has_key("depotFile%s" % fnum):
  90        path = details["depotFile%s" % fnum]
  91        if not path.startswith(prefix):
  92            print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
  93            fnum = fnum + 1
  94            continue
  95
  96        rev = details["rev%s" % fnum]
  97        depotPath = path + "#" + rev
  98        relPath = path[len(prefix):]
  99        action = details["action%s" % fnum]
 100
 101        if action == "delete":
 102            gitStream.write("D %s\n" % relPath)
 103        else:
 104            mode = 644
 105            if details["type%s" % fnum].startswith("x"):
 106                mode = 755
 107
 108            data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 109
 110            gitStream.write("M %s inline %s\n" % (mode, relPath))
 111            gitStream.write("data %s\n" % len(data))
 112            gitStream.write(data)
 113            gitStream.write("\n")
 114
 115        fnum = fnum + 1
 116
 117    gitStream.write("\n")
 118
 119    gitStream.write("tag p4/%s\n" % change)
 120    gitStream.write("from %s\n" % branch);
 121    gitStream.write("tagger %s\n" % committer);
 122    gitStream.write("data 0\n\n")
 123
 124
 125def getUserMap():
 126    users = {}
 127
 128    for output in p4CmdList("users"):
 129        if not output.has_key("User"):
 130            continue
 131        users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 132    return users
 133
 134users = getUserMap()
 135
 136if len(changeRange) == 0:
 137    try:
 138        sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 139        output = sout.read()
 140        tagIdx = output.index(" tags/p4/")
 141        caretIdx = output.index("^")
 142        revision = int(output[tagIdx + 9 : caretIdx]) + 1
 143        changeRange = "@%s,#head" % revision
 144        initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 145    except:
 146        pass
 147
 148output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 149
 150changes = []
 151for line in output:
 152    changeNum = line.split(" ")[1]
 153    changes.append(changeNum)
 154
 155changes.reverse()
 156
 157if len(changes) == 0:
 158    print "no changes to import!"
 159    sys.exit(1)
 160
 161sys.stderr.write("\n")
 162
 163tz = - time.timezone / 36
 164
 165gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 166
 167cnt = 1
 168for change in changes:
 169    description = p4Cmd("describe %s" % change)
 170
 171    sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 172    sys.stdout.flush()
 173    cnt = cnt + 1
 174
 175    commit(description)
 176
 177gitStream.close()
 178gitOutput.close()
 179gitError.close()
 180
 181print ""