cvs2svn_lib/main.py

   1 #!/usr/bin/env python
   2 # (Be in -*- python -*- mode.)
   3 #
   4 # ====================================================================
   5 # Copyright (c) 2000-2007 CollabNet.  All rights reserved.
   6 #
   7 # This software is licensed as described in the file COPYING, which
   8 # you should have received as part of this distribution.  The terms
   9 # are also available at http://subversion.tigris.org/license-1.html.
  10 # If newer versions of this license are posted there, you may use a
  11 # newer version instead, at your option.
  12 #
  13 # This software consists of voluntary contributions made by many
  14 # individuals.  For exact contribution history, see the revision
  15 # history and logs, available at http://cvs2svn.tigris.org/.
  16 # ====================================================================
  17
  18 import os
  19 import errno
  20 import gc
  21
  22 try:
  23   # Try to get access to a bunch of encodings for use with --encoding.
  24   # See http://cjkpython.i18n.org/ for details.
  25   import iconv_codec
  26 except ImportError:
  27   pass
  28
  29 from cvs2svn_lib.common import FatalError
  30 from cvs2svn_lib.run_options import RunOptions
  31 from cvs2svn_lib.context import Ctx
  32 from cvs2svn_lib.pass_manager import PassManager
  33 from cvs2svn_lib.passes import passes
  34
  35
  36 def main(progname, cmd_args):
  37   # Disable garbage collection, as we try not to create any circular
  38   # data structures:
  39   gc.disable()
  40
  41   # Convenience var, so we don't have to keep instantiating this Borg.
  42   ctx = Ctx()
  43
  44   pass_manager = PassManager(passes)
  45
  46   run_options = RunOptions(progname, cmd_args, pass_manager)
  47
  48   # Make sure the tmp directory exists.  Note that we don't check if
  49   # it's empty -- we want to be able to use, for example, "." to hold
  50   # tempfiles.  But if we *did* want check if it were empty, we'd do
  51   # something like os.stat(ctx.tmpdir)[stat.ST_NLINK], of course :-).
  52   if not os.path.exists(ctx.tmpdir):
  53     erase_tmpdir = True
  54     os.mkdir(ctx.tmpdir)
  55   elif not os.path.isdir(ctx.tmpdir):
  56     raise FatalError(
  57         "cvs2svn tried to use '%s' for temporary files, but that path\n"
  58         "  exists and is not a directory.  Please make it be a directory,\n"
  59         "  or specify some other directory for temporary files."
  60         % (ctx.tmpdir,))
  61   else:
  62     erase_tmpdir = False
  63
  64   # But do lock the tmpdir, to avoid process clash.
  65   try:
  66     os.mkdir(os.path.join(ctx.tmpdir, 'cvs2svn.lock'))
  67   except OSError, e:
  68     if e.errno == errno.EACCES:
  69       raise FatalError("Permission denied:"
  70                        + " No write access to directory '%s'." % ctx.tmpdir)
  71     if e.errno == errno.EEXIST:
  72       raise FatalError(
  73           "cvs2svn is using directory '%s' for temporary files, but\n"
  74           "  subdirectory '%s/cvs2svn.lock' exists, indicating that another\n"
  75           "  cvs2svn process is currently using '%s' as its temporary\n"
  76           "  workspace.  If you are certain that is not the case,\n"
  77           "  then remove the '%s/cvs2svn.lock' subdirectory."
  78           % (ctx.tmpdir, ctx.tmpdir, ctx.tmpdir, ctx.tmpdir,))
  79     raise
  80
  81   try:
  82     if run_options.profiling:
  83       import hotshot
  84       prof = hotshot.Profile('cvs2svn.hotshot')
  85       prof.runcall(pass_manager.run, run_options)
  86       prof.close()
  87     else:
  88       pass_manager.run(run_options)
  89   finally:
  90     try:
  91       os.rmdir(os.path.join(ctx.tmpdir, 'cvs2svn.lock'))
  92     except:
  93       pass
  94
  95     if erase_tmpdir:
  96       try:
  97         os.rmdir(ctx.tmpdir)
  98       except:
  99         pass
 100