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:  - support integrations (at least p4i)
   9 #       - support incremental imports
  10 #       - create tags
  11 #       - instead of reading all files into a variable try to pipe from
  12 #       - p4 print directly to stdout. need to figure out file size somehow
  13 #         though.
  14 #       - support p4 submit (hah!)
  15 #       - don't hardcode the import to master
  16 #
  17 import os, string, sys, time
  18
  19 if len(sys.argv) != 2:
  20     sys.stderr.write("usage: %s //depot/path[@revRange]\n" % sys.argv[0]);
  21     sys.stderr.write("\n    example:\n");
  22     sys.stderr.write("    %s //depot/my/project/ -- to import everything\n");
  23     sys.stderr.write("    %s //depot/my/project/@1,6 -- to import only from revision 1 to 6\n");
  24     sys.stderr.write("\n");
  25     sys.stderr.write("    (a ... is not needed in the path p4 specification, it's added implicitly)\n");
  26     sys.stderr.write("\n");
  27     sys.exit(1)
  28
  29 prefix = sys.argv[1]
  30 changeRange = ""
  31 try:
  32     atIdx = prefix.index("@")
  33     changeRange = prefix[atIdx:]
  34     prefix = prefix[0:atIdx]
  35 except ValueError:
  36     changeRange = ""
  37
  38 if not prefix.endswith("/"):
  39     prefix += "/"
  40
  41 def describe(change):
  42     output = os.popen("p4 describe %s" % change).readlines()
  43
  44     firstLine = output[0]
  45
  46     splitted = firstLine.split(" ")
  47     author = splitted[3]
  48     author = author[:author.find("@")]
  49     tm = time.strptime(splitted[5] + " " + splitted[6] + time.tzname[0], "%Y/%m/%d %H:%M:%S %Z")
  50     epoch = int(time.mktime(tm))
  51
  52     filesSection = 0
  53     try:
  54         filesSection = output.index("Affected files ...\n")
  55     except ValueError:
  56         sys.stderr.write("Change %s doesn't seem to affect any files. Weird.\n" % change)
  57         return [], [], [], [], []
  58
  59     differencesSection = 0
  60     try:
  61         differencesSection = output.index("Differences ...\n")
  62     except ValueError:
  63         sys.stderr.write("Change %s doesn't seem to have a differences section. Weird.\n" % change)
  64         return [], [], [], [], []
  65
  66     log = output[2:filesSection - 1]
  67
  68     lines = output[filesSection + 2:differencesSection - 1]
  69
  70     changed = []
  71     removed = []
  72
  73     for line in lines:
  74         # chop off "... " and trailing newline
  75         line = line[4:len(line) - 1]
  76
  77         lastSpace = line.rfind(" ")
  78         if lastSpace == -1:
  79             sys.stderr.write("trouble parsing line %s, skipping!\n" % line)
  80             continue
  81
  82         operation = line[lastSpace + 1:]
  83         path = line[:lastSpace]
  84
  85         if operation == "delete":
  86             removed.append(path)
  87         else:
  88             changed.append(path)
  89
  90     return author, log, epoch, changed, removed
  91
  92 def p4cat(path):
  93     return os.popen("p4 print -q \"%s\"" % path).read()
  94
  95 def stripRevision(path):
  96     hashPos = path.rindex("#")
  97     return path[:hashPos]
  98
  99 def getUserMap():
 100     users = {}
 101     output = os.popen("p4 users")
 102     for line in output:
 103         firstSpace = line.index(" ")
 104         secondSpace = line.index(" ", firstSpace + 1)
 105         key = line[:firstSpace]
 106         email = line[firstSpace + 1:secondSpace]
 107         openParenPos = line.index("(", secondSpace)
 108         closedParenPos = line.index(")", openParenPos)
 109         name = line[openParenPos + 1:closedParenPos]
 110
 111         users[key] = name + " " + email
 112
 113     return users
 114
 115
 116 users = getUserMap()
 117
 118 output = os.popen("p4 changes %s...%s" % (prefix, changeRange)).readlines()
 119
 120 changes = []
 121 for line in output:
 122     changeNum = line.split(" ")[1]
 123     changes.append(changeNum)
 124
 125 changes.reverse()
 126
 127 sys.stderr.write("\n")
 128
 129 cnt = 1
 130 for change in changes:
 131     [ author, log, epoch, changedFiles, removedFiles ] = describe(change)
 132     sys.stderr.write("\rimporting revision %s (%s%%)" % (change, cnt * 100 / len(changes)))
 133     cnt = cnt + 1
 134 #    sys.stderr.write("%s\n" % log)
 135 #    sys.stderr.write("%s\n" % changedFiles)
 136 #    sys.stderr.write("%s\n" % removedFiles)
 137
 138     print "commit refs/heads/master"
 139     if author in users:
 140         print "committer %s %s +0000" % (users[author], epoch)
 141     else:
 142         print "committer %s <a@b> %s +0000" % (author, epoch)
 143     print "data <<EOT"
 144     for l in log:
 145         print l[:len(l) - 1]
 146     print "EOT"
 147
 148     print ""
 149
 150     for f in changedFiles:
 151         if not f.startswith(prefix):
 152             sys.stderr.write("\nchanged files: ignoring path %s outside of %s in change %s\n" % (f, prefix, change))
 153             continue
 154         relpath = f[len(prefix):]
 155         print "M 644 inline %s" % stripRevision(relpath)
 156         data = p4cat(f)
 157         print "data %s" % len(data)
 158         sys.stdout.write(data)
 159         print ""
 160
 161     for f in removedFiles:
 162         if not f.startswith(prefix):
 163             sys.stderr.write("\ndeleted files: ignoring path %s outside of %s in change %s\n" % (f, prefix, change))
 164             continue
 165         relpath = f[len(prefix):]
 166         print "D %s" % stripRevision(relpath)
 167
 168     print ""
 169
 170 sys.stderr.write("\n")
 171