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