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