tools/tools/splitpatch/splitpatch.py

   1 #!/usr/local/bin/python
   2 # $DragonFly: src/tools/tools/splitpatch/splitpatch.py,v 1.2 2005/05/21 10:47:43 corecode Exp $
   3
   4 """Split a patch file into one patch for each file."""
   5
   6 __copyright__ = """
   7 Copyright (c) 2004 Joerg Sonnenberger.  All rights reserved.
   8
   9 Redistribution and use in source and binary forms, with or without
  10 modification, are permitted provided that the following conditions are
  11 met:
  12
  13   * Redistributions of source code must retain the above copyright
  14     notice, this list of conditions and the following disclaimer.
  15
  16   * Redistributions in binary form must reproduce the above copyright
  17     notice, this list of conditions and the following disclaimer in the
  18     documentation and/or other materials provided with the distribution.
  19
  20   * Neither the name of the authors nor the names of there
  21     contributors may be used to endorse or promote products derived from
  22     this software without specific prior written permission.
  23
  24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  25 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  26 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  27 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
  28 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  31 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35 """
  36
  37
  38 import os.path
  39
  40 def directory_save(filename, patch, suffix = None, root = None, forceful = False):
  41         """
  42         Saves patch into filename.suffix relative to root.
  43         """
  44         if suffix is None:
  45                 suffix = ".patch"
  46         if root is None:
  47                 root = ""
  48         output_name  = os.path.join(root, "%s%s" % (filename.replace('/',','), suffix))
  49
  50         if os.path.exists(output_name) and not forceful:
  51                 raise IOError, 'file exists'
  52         f = open(output_name,"w")
  53         f.write(patch)
  54         f.close()
  55
  56 def splitpatch(source, output = directory_save, quiet = False):
  57         """
  58         Split the patch in source into independent pieces
  59         and call output on the result with the guessed filename
  60         and the patch itself.
  61
  62         source has to provide an iterator like file objects.
  63         """
  64         diff_line = { " ": True, "+": True, "-": True, "@": True, "!": True, '*': True }
  65         buf = []
  66         filename = None
  67         for line in source:
  68                 if not filename:
  69                         if line.startswith('***'):
  70                                 # context diff
  71                                 filename = line.split()[1]
  72                         elif line.startswith('+++'):
  73                                 # unified diff
  74                                 filename = line.split()[1]
  75
  76                         if filename and not quiet:
  77                                 print "Found patch for %s" % filename
  78
  79                         buf.append(line)
  80                 elif diff_line.get(line[0]):
  81                         # valid line for a patch
  82                         buf.append(line)
  83                 else:
  84                         # invalid line for a patch, write out current buffer
  85                         output(filename, "".join(buf))
  86
  87                         filename = None
  88                         buf = []
  89
  90         if filename:
  91                 output(filename, "".join(buf))
  92
  93 def main():
  94         from optparse import OptionParser
  95         import sys
  96         parser = OptionParser("usage: %prog [-q] [-f] [-s suffix] [input]")
  97         parser.add_option("-q", "--quiet", action="store_true", dest="quiet", help="do not print names of the subpatches")
  98         parser.add_option("-f", "--force", action="store_true", dest="force", help="overwrite existing patches")
  99         parser.add_option("-s", "--suffix", type="string", dest="suffix", help="use SUFFIX instead of .patch for the created patches")
 100         parser.add_option("-d", "--directory", type="string", dest="directory", help="create patches in DIRECTORY")
 101         (options, args) = parser.parse_args()
 102         if len(args) > 1:
 103                 parser.error("incorrect number of arguments")
 104         if args:
 105                 source = open(args[0])
 106         else:
 107                 source = sys.stdin
 108         splitpatch(source, lambda filename, patch: directory_save(filename, patch, forceful = options.force,
 109                                 suffix = options.suffix, root = options.directory), quiet = options.quiet)
 110
 111 if __name__ == '__main__':
 112         main()