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 #
  12 import os, string, sys, time
  13 import marshal, popen2
  14
  15 branch = "refs/heads/p4"
  16 prefix = previousDepotPath = 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 the current head"
  26     print "    %s //depot/my/project/@all -- to import everything"
  27     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  28     print ""
  29     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  30     print ""
  31     sys.exit(1)
  32 else:
  33     if len(prefix) != 0 and prefix != sys.argv[1]:
  34         print "previous import used depot path %s and now %s was specified. this doesn't work!" % (prefix, sys.argv[1])
  35         sys.exit(1)
  36     prefix = sys.argv[1]
  37
  38 changeRange = ""
  39 revision = ""
  40 users = {}
  41 initialParent = ""
  42
  43 if prefix.find("@") != -1:
  44     atIdx = prefix.index("@")
  45     changeRange = prefix[atIdx:]
  46     if changeRange == "@all":
  47         changeRange = ""
  48     elif changeRange.find(",") == -1:
  49         revision = changeRange
  50         changeRange = ""
  51     prefix = prefix[0:atIdx]
  52 elif prefix.find("#") != -1:
  53     hashIdx = prefix.index("#")
  54     revision = prefix[hashIdx:]
  55     prefix = prefix[0:hashIdx]
  56 elif len(previousDepotPath) == 0:
  57     revision = "#head"
  58
  59 if prefix.endswith("..."):
  60     prefix = prefix[:-3]
  61
  62 if not prefix.endswith("/"):
  63     prefix += "/"
  64
  65 def p4CmdList(cmd):
  66     pipe = os.popen("p4 -G %s" % cmd, "rb")
  67     result = []
  68     try:
  69         while True:
  70             entry = marshal.load(pipe)
  71             result.append(entry)
  72     except EOFError:
  73         pass
  74     pipe.close()
  75     return result
  76
  77 def p4Cmd(cmd):
  78     list = p4CmdList(cmd)
  79     result = {}
  80     for entry in list:
  81         result.update(entry)
  82     return result;
  83
  84 def commit(details):
  85     global initialParent
  86     global users
  87
  88     epoch = details["time"]
  89     author = details["user"]
  90
  91     gitStream.write("commit %s\n" % branch)
  92     committer = ""
  93     if author in users:
  94         committer = "%s %s %s" % (users[author], epoch, tz)
  95     else:
  96         committer = "%s <a@b> %s %s" % (author, epoch, tz)
  97
  98     gitStream.write("committer %s\n" % committer)
  99
 100     gitStream.write("data <<EOT\n")
 101     gitStream.write(details["desc"])
 102     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
 103     gitStream.write("EOT\n\n")
 104
 105     if len(initialParent) > 0:
 106         gitStream.write("from %s\n" % initialParent)
 107         initialParent = ""
 108
 109     fnum = 0
 110     while details.has_key("depotFile%s" % fnum):
 111         path = details["depotFile%s" % fnum]
 112         if not path.startswith(prefix):
 113             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 114             fnum = fnum + 1
 115             continue
 116
 117         rev = details["rev%s" % fnum]
 118         depotPath = path + "#" + rev
 119         relPath = path[len(prefix):]
 120         action = details["action%s" % fnum]
 121
 122         if action == "delete":
 123             gitStream.write("D %s\n" % relPath)
 124         else:
 125             mode = 644
 126             if details["type%s" % fnum].startswith("x"):
 127                 mode = 755
 128
 129             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 130
 131             gitStream.write("M %s inline %s\n" % (mode, relPath))
 132             gitStream.write("data %s\n" % len(data))
 133             gitStream.write(data)
 134             gitStream.write("\n")
 135
 136         fnum = fnum + 1
 137
 138     gitStream.write("\n")
 139
 140     gitStream.write("tag p4/%s\n" % details["change"])
 141     gitStream.write("from %s\n" % branch);
 142     gitStream.write("tagger %s\n" % committer);
 143     gitStream.write("data 0\n\n")
 144
 145
 146 def getUserMap():
 147     users = {}
 148
 149     for output in p4CmdList("users"):
 150         if not output.has_key("User"):
 151             continue
 152         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 153     return users
 154
 155 users = getUserMap()
 156
 157 if len(changeRange) == 0:
 158     try:
 159         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 160         output = sout.read()
 161         tagIdx = output.index(" tags/p4/")
 162         caretIdx = output.index("^")
 163         rev = int(output[tagIdx + 9 : caretIdx]) + 1
 164         changeRange = "@%s,#head" % rev
 165         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 166     except:
 167         pass
 168
 169 sys.stderr.write("\n")
 170
 171 tz = - time.timezone / 36
 172 tzsign = ("%s" % tz)[0]
 173 if tzsign != '+' and tzsign != '-':
 174     tz = "+" + ("%s" % tz)
 175
 176 if len(revision) > 0:
 177     print "Doing initial import of %s from revision %s" % (prefix, revision)
 178
 179     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 180     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 181     details["change"] = revision
 182     newestRevision = 0
 183
 184     fileCnt = 0
 185     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 186         change = int(info["change"])
 187         if change > newestRevision:
 188             newestRevision = change
 189
 190         if info["action"] == "delete":
 191             continue
 192
 193         for prop in [ "depotFile", "rev", "action", "type" ]:
 194             details["%s%s" % (prop, fileCnt)] = info[prop]
 195
 196         fileCnt = fileCnt + 1
 197
 198     details["change"] = newestRevision
 199
 200     gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 201     try:
 202         commit(details)
 203     except:
 204         print gitError.read()
 205
 206     gitStream.close()
 207     gitOutput.close()
 208     gitError.close()
 209 else:
 210     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 211
 212     changes = []
 213     for line in output:
 214         changeNum = line.split(" ")[1]
 215         changes.append(changeNum)
 216
 217     changes.reverse()
 218
 219     if len(changes) == 0:
 220         print "no changes to import!"
 221         sys.exit(1)
 222
 223     gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 224
 225     cnt = 1
 226     for change in changes:
 227         description = p4Cmd("describe %s" % change)
 228
 229         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 230         sys.stdout.flush()
 231         cnt = cnt + 1
 232
 233         commit(description)
 234
 235     gitStream.close()
 236     gitOutput.close()
 237     gitError.close()
 238
 239 print ""
 240
 241 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 242