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, getopt
  14
  15 branch = "refs/heads/master"
  16 prefix = previousDepotPath = os.popen("git-repo-config --get p4.depotpath").read()
  17 if len(prefix) != 0:
  18     prefix = prefix[:-1]
  19
  20 try:
  21     opts, args = getopt.getopt(sys.argv[1:], "", [ "branch=" ])
  22 except getopt.GetoptError:
  23     print "fixme, syntax error"
  24     sys.exit(1)
  25
  26 for o, a in opts:
  27     if o == "--branch":
  28         branch = "refs/heads/" + a
  29
  30 if len(args) == 0 and len(prefix) != 0:
  31     print "[using previously specified depot path %s]" % prefix
  32 elif len(args) != 1:
  33     print "usage: %s //depot/path[@revRange]" % sys.argv[0]
  34     print "\n    example:"
  35     print "    %s //depot/my/project/ -- to import the current head"
  36     print "    %s //depot/my/project/@all -- to import everything"
  37     print "    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6"
  38     print ""
  39     print "    (a ... is not needed in the path p4 specification, it's added implicitly)"
  40     print ""
  41     sys.exit(1)
  42 else:
  43     if len(prefix) != 0 and prefix != args[0]:
  44         print "previous import used depot path %s and now %s was specified. this doesn't work!" % (prefix, args[0])
  45         sys.exit(1)
  46     prefix = args[0]
  47
  48 changeRange = ""
  49 revision = ""
  50 users = {}
  51 initialParent = ""
  52 lastChange = ""
  53 initialTag = ""
  54
  55 if prefix.find("@") != -1:
  56     atIdx = prefix.index("@")
  57     changeRange = prefix[atIdx:]
  58     if changeRange == "@all":
  59         changeRange = ""
  60     elif changeRange.find(",") == -1:
  61         revision = changeRange
  62         changeRange = ""
  63     prefix = prefix[0:atIdx]
  64 elif prefix.find("#") != -1:
  65     hashIdx = prefix.index("#")
  66     revision = prefix[hashIdx:]
  67     prefix = prefix[0:hashIdx]
  68 elif len(previousDepotPath) == 0:
  69     revision = "#head"
  70
  71 if prefix.endswith("..."):
  72     prefix = prefix[:-3]
  73
  74 if not prefix.endswith("/"):
  75     prefix += "/"
  76
  77 def p4CmdList(cmd):
  78     pipe = os.popen("p4 -G %s" % cmd, "rb")
  79     result = []
  80     try:
  81         while True:
  82             entry = marshal.load(pipe)
  83             result.append(entry)
  84     except EOFError:
  85         pass
  86     pipe.close()
  87     return result
  88
  89 def p4Cmd(cmd):
  90     list = p4CmdList(cmd)
  91     result = {}
  92     for entry in list:
  93         result.update(entry)
  94     return result;
  95
  96 def commit(details):
  97     global initialParent
  98     global users
  99     global lastChange
 100
 101     epoch = details["time"]
 102     author = details["user"]
 103
 104     gitStream.write("commit %s\n" % branch)
 105     committer = ""
 106     if author in users:
 107         committer = "%s %s %s" % (users[author], epoch, tz)
 108     else:
 109         committer = "%s <a@b> %s %s" % (author, epoch, tz)
 110
 111     gitStream.write("committer %s\n" % committer)
 112
 113     gitStream.write("data <<EOT\n")
 114     gitStream.write(details["desc"])
 115     gitStream.write("\n[ imported from %s; change %s ]\n" % (prefix, details["change"]))
 116     gitStream.write("EOT\n\n")
 117
 118     if len(initialParent) > 0:
 119         gitStream.write("from %s\n" % initialParent)
 120         initialParent = ""
 121
 122     fnum = 0
 123     while details.has_key("depotFile%s" % fnum):
 124         path = details["depotFile%s" % fnum]
 125         if not path.startswith(prefix):
 126             print "\nchanged files: ignoring path %s outside of %s in change %s" % (path, prefix, change)
 127             fnum = fnum + 1
 128             continue
 129
 130         rev = details["rev%s" % fnum]
 131         depotPath = path + "#" + rev
 132         relPath = path[len(prefix):]
 133         action = details["action%s" % fnum]
 134
 135         if action == "delete":
 136             gitStream.write("D %s\n" % relPath)
 137         else:
 138             mode = 644
 139             if details["type%s" % fnum].startswith("x"):
 140                 mode = 755
 141
 142             data = os.popen("p4 print -q \"%s\"" % depotPath, "rb").read()
 143
 144             gitStream.write("M %s inline %s\n" % (mode, relPath))
 145             gitStream.write("data %s\n" % len(data))
 146             gitStream.write(data)
 147             gitStream.write("\n")
 148
 149         fnum = fnum + 1
 150
 151     gitStream.write("\n")
 152
 153     lastChange = details["change"]
 154
 155 def getUserMap():
 156     users = {}
 157
 158     for output in p4CmdList("users"):
 159         if not output.has_key("User"):
 160             continue
 161         users[output["User"]] = output["FullName"] + " <" + output["Email"] + ">"
 162     return users
 163
 164 users = getUserMap()
 165
 166 if len(changeRange) == 0:
 167     try:
 168         sout, sin, serr = popen2.popen3("git-name-rev --tags `git-rev-parse %s`" % branch)
 169         output = sout.read()
 170         if output.endswith("\n"):
 171             output = output[:-1]
 172         tagIdx = output.index(" tags/p4/")
 173         caretIdx = output.find("^")
 174         endPos = len(output)
 175         if caretIdx != -1:
 176             endPos = caretIdx
 177         rev = int(output[tagIdx + 9 : endPos]) + 1
 178         changeRange = "@%s,#head" % rev
 179         initialParent = os.popen("git-rev-parse %s" % branch).read()[:-1]
 180         initialTag = "p4/%s" % (int(rev) - 1)
 181     except:
 182         pass
 183
 184 sys.stderr.write("\n")
 185
 186 tz = - time.timezone / 36
 187 tzsign = ("%s" % tz)[0]
 188 if tzsign != '+' and tzsign != '-':
 189     tz = "+" + ("%s" % tz)
 190
 191 gitOutput, gitStream, gitError = popen2.popen3("git-fast-import")
 192
 193 if len(revision) > 0:
 194     print "Doing initial import of %s from revision %s" % (prefix, revision)
 195
 196     details = { "user" : "git perforce import user", "time" : int(time.time()) }
 197     details["desc"] = "Initial import of %s from the state at revision %s" % (prefix, revision)
 198     details["change"] = revision
 199     newestRevision = 0
 200
 201     fileCnt = 0
 202     for info in p4CmdList("files %s...%s" % (prefix, revision)):
 203         change = int(info["change"])
 204         if change > newestRevision:
 205             newestRevision = change
 206
 207         if info["action"] == "delete":
 208             continue
 209
 210         for prop in [ "depotFile", "rev", "action", "type" ]:
 211             details["%s%s" % (prop, fileCnt)] = info[prop]
 212
 213         fileCnt = fileCnt + 1
 214
 215     details["change"] = newestRevision
 216
 217     try:
 218         commit(details)
 219     except:
 220         print gitError.read()
 221
 222 else:
 223     output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 224
 225     changes = []
 226     for line in output:
 227         changeNum = line.split(" ")[1]
 228         changes.append(changeNum)
 229
 230     changes.reverse()
 231
 232     if len(changes) == 0:
 233         print "no changes to import!"
 234         sys.exit(1)
 235
 236     cnt = 1
 237     for change in changes:
 238         description = p4Cmd("describe %s" % change)
 239
 240         sys.stdout.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 241         sys.stdout.flush()
 242         cnt = cnt + 1
 243
 244         try:
 245             commit(description)
 246         except:
 247             print gitError.read()
 248             sys.exit(1)
 249
 250 print ""
 251
 252 gitStream.write("reset refs/tags/p4/%s\n" % lastChange)
 253 gitStream.write("from %s\n\n" % branch);
 254
 255
 256 gitStream.close()
 257 gitOutput.close()
 258 gitError.close()
 259
 260 os.popen("git-repo-config p4.depotpath %s" % prefix).read()
 261 if len(initialTag) > 0:
 262     os.popen("git tag -d %s" % initialTag).read()
 263
 264 sys.exit(0)