Andrew's git - gitweb.git/blob - contrib/fast-import/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#
  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 = ""
  28try:
  29    atIdx = prefix.index("@")
  30    changeRange = prefix[atIdx:]
  31    prefix = prefix[0:atIdx]
  32except ValueError:
  33    changeRange = ""
  34
  35if prefix.endswith("..."):
  36    prefix = prefix[:-3]
  37
  38if not prefix.endswith("/"):
  39    prefix += "/"
  40
  41def 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
  53def p4Cmd(cmd):
  54    list = p4CmdList(cmd)
  55    result = {}
  56    for entry in list:
  57        result.update(entry)
  58    return result;
  59
  60def 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
  69users = getUserMap()
  70topMerge = ""
  71
  72if len(changeRange) == 0:
  73    try:
  74        sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
  75        output = sout.read()
  76        tagIdx = output.index(" tags/p4/")
  77        caretIdx = output.index("^")
  78        revision = int(output[tagIdx + 9 : caretIdx]) + 1
  79        changeRange = "@%s,#head" % revision
  80        topMerge = os.popen("git-rev-parse %s" % branch).read()[:-1]
  81    except:
  82        pass
  83
  84output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
  85
  86changes = []
  87for line in output:
  88    changeNum = line.split(" ")[1]
  89    changes.append(changeNum)
  90
  91changes.reverse()
  92
  93if len(changes) == 0:
  94    print "no changes to import!"
  95    sys.exit(1)
  96
  97sys.stderr.write("\n")
  98
  99tz = - time.timezone / 36
 100
 101gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 102
 103cnt = 1
 104for change in changes:
 105    description = p4Cmd("describe %s" % change)
 106
 107    sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 108    sys.stdout.flush()
 109    cnt = cnt + 1
 110
 111    epoch = description["time"]
 112    author = description["user"]
 113
 114    gitStream.write("commit %s\n" % branch)
 115    committer = ""
 116    if author in users:
 117        committer = "%s %s %s" % (users[author], epoch, tz)
 118    else:
 119        committer = "%s <a@b> %s %s" % (author, epoch, tz)
 120
 121    gitStream.write("committer %s\n" % committer)
 122
 123    gitStream.write("data <<EOT\n")
 124    gitStream.write(description["desc"])
 125    gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, change))
 126    gitStream.write("EOT\n\n")
 127
 128    if len(topMerge) > 0:
 129        gitStream.write("merge %s\n" % topMerge)
 130        topMerge = ""
 131
 132    fnum = 0
 133    while description.has_key("depotFile%s" % fnum):
 134        path = description["depotFile%s" % fnum]
 135        if not path.startswith(prefix):
 136            print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 137            fnum = fnum + 1
 138            continue
 139
 140        rev = description["rev%s" % fnum]
 141        depotPath = path + "#" + rev
 142        relPath = path[len(prefix):]
 143        action = description["action%s" % fnum]
 144
 145        if action == "delete":
 146            gitStream.write("D %s\n" % relPath)
 147        else:
 148            mode = 644
 149            if description["type%s" % fnum].startswith("x"):
 150                mode = 755
 151
 152            data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 153
 154            gitStream.write("M %s inline %s\n" % (mode, relPath))
 155            gitStream.write("data %s\n" % len(data))
 156            gitStream.write(data)
 157            gitStream.write("\n")
 158
 159        fnum = fnum + 1
 160
 161    gitStream.write("\n")
 162
 163    gitStream.write("tag p4/%s\n" % change)
 164    gitStream.write("from %s\n" % branch);
 165    gitStream.write("tagger %s\n" % committer);
 166    gitStream.write("data 0\n\n")
 167
 168
 169gitStream.close()
 170gitOutput.close()
 171gitError.close()
 172
 173print ""