build/dependparser.py

   1 #!/usr/bin/env python
   2 # -*- Mode: Python; indent-tabs-mode: nil -*-
   3 # ***** BEGIN LICENSE BLOCK *****
   4 # Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5 #
   6 # The contents of this file are subject to the Mozilla Public License Version
   7 # 1.1 (the "License"); you may not use this file except in compliance with
   8 # the License. You may obtain a copy of the License at
   9 # http://www.mozilla.org/MPL/
  10 #
  11 # Software distributed under the License is distributed on an "AS IS" basis,
  12 # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13 # for the specific language governing rights and limitations under the
  14 # License.
  15 #
  16 # The Original Code is [Open Source Virtual Machine].
  17 #
  18 # The Initial Developer of the Original Code is
  19 # Adobe System Incorporated.
  20 # Portions created by the Initial Developer are Copyright (C) 2005-2006
  21 # the Initial Developer. All Rights Reserved.
  22 #
  23 # Contributor(s):
  24 #
  25 # Alternatively, the contents of this file may be used under the terms of
  26 # either the GNU General Public License Version 2 or later (the "GPL"), or
  27 # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28 # in which case the provisions of the GPL or the LGPL are applicable instead
  29 # of those above. If you wish to allow use of your version of this file only
  30 # under the terms of either the GPL or the LGPL, and not to allow others to
  31 # use your version of this file under the terms of the MPL, indicate your
  32 # decision by deleting the provisions above and replace them with the notice
  33 # and other provisions required by the GPL or the LGPL. If you do not delete
  34 # the provisions above, a recipient may use your version of this file under
  35 # the terms of any one of the MPL, the GPL or the LGPL.
  36 #
  37 # ***** END LICENSE BLOCK *****
  38
  39
  40 """Pipes stdin | stdout and extracts a list of all header dependencies to
  41 a file.  It requires exactly two arguments.
  42
  43 The input is expected to take form of C preprocessor output, where
  44 paths to originating input source files are indicated via the form
  45 # LINENO "PATH"
  46
  47 The first argument to the script is the target file to be overwritten.
  48 It will contain the extracted dependencies (unquoted paths).
  49
  50 The second argument to the script is the path of an originating source
  51 file.  It is used to resolve relative paths within the input.
  52 (Relative paths are unusual, but can arise via manual #line directives
  53 in the source code; e.g. see bug 477230.)"""
  54
  55 import re
  56 import sys
  57 import os
  58
  59 if len(sys.argv) != 3:
  60     raise Exception("Unexpected command line argument.")
  61
  62 outfile          = sys.argv[1]
  63 originating_file = sys.argv[2]
  64
  65 relative_to_dir  = os.path.dirname(originating_file)
  66
  67 _lineExp = re.compile("#(?:line)? ?\d+ \"([^\"<>]+[^/])\"");
  68
  69 deps = set()
  70
  71 for line in sys.stdin:
  72     sys.stdout.write(line)
  73     m = _lineExp.match(line)
  74     if m:
  75         path = m.group(1)
  76         if not os.path.isabs(path):
  77             path = os.path.abspath(os.path.join(relative_to_dir, path))
  78         deps.add(path)
  79
  80
  81 ostream = open(outfile, "w")
  82 ostream.write("\n".join(deps))
  83 ostream.close()