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gen-nutupsconf-aug.py

#!/usr/bin/env python
#   Copyright (C) 2010 - Arnaud Quette <arnaud.quette@gmail.com>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

# This program extracts all drivers specific variables, declared
# using 'addvar()' and output a complete ups.conf lens for Augeas

import sys
import re
import glob
import codecs

# Return a sorted list of unique entries, based on the input 'list'
def sortUnique(list):
      newVarList = []
      prevVar = ''

      # sort the list
      list.sort()

      for curVariable in list:
            if curVariable != prevVar:
                  newVarList.append(curVariable)
            prevVar = curVariable

      return newVarList

# Grep for 'string' pattern in the text 'list',
# excluding C/C++ styles comments
# Return the list of matching lines
def grep(string,list):
      matchList = []
      expr = re.compile(string)
      for text in list:
            match = expr.search(text)
            if match != None:
                  # Exclude comments
                  exprComment = re.compile('(/\*([^*]|(\*+[^*/]))*\*+/)|(//.*)')
                  if (exprComment.search(match.string) == None):
                        matchList.append(match.string)

      return matchList

if __name__ == '__main__':

      rawCount = 0
      global finalCount
      variableNames = []
      specificVars = ""
      global inLensContent
      global finalLensContent
      Exceptionlist = ['../../drivers/main.c', '../../drivers/skel.c']
      outputFilename = 'nutupsconf.aug.in'
      templateFilename = 'nutupsconf.aug.tpl'
      dirPrefix = ''

      if (len(sys.argv) == 2):
            dirPrefix = sys.argv[1]
            print dirPrefix

      # 1/ Extract all specific drivers parameters, in a sorted list with unique entries
      # 1.1/ List all drivers implementation files
      for filename in glob.glob('../../drivers/*.c'):
            # 1.2/ Exclude main.c, which defines addvar() and skel.c (example driver)
            if filename not in Exceptionlist:
                  fd = codecs.open(filename, encoding='utf-8')
                  # 1.3/ Grep for the "addvar(..." pattern
                  matchResults = grep ('.*addvar[\ ]*\(.*(VAR_FLAG|VAR_VALUE)*,.*', fd)

                  # 1.4/ Extract variable names
                  for line in matchResults:
                        row = line.split(',')
                        if len(row) >= 2:
                              # Absence of quotes indicate that we have a #define
                              # Let's grep in .ch related files
                              if (row[1].find('"') == -1):
                                    for defFilename in glob.glob(filename.replace('.c', '.[ch]')):
                                          defFd = codecs.open(defFilename, encoding='utf-8')
                                          matchString = '^#define.*' + row[1].replace('"', '').lstrip() + '.*'
                                          matchResult = grep (matchString, defFd)
                                          for varDefine in matchResult:
                                                # Now search for a string
                                                defRow = re.findall(r'"([^"]*)",?', varDefine)
                                                if (len(defRow) == 1):
                                                      variableNames.append(defRow[0])
                              else:
                                    # Remove quotes
                                    variableNames.append(row[1].replace('"', '').lstrip())

      # Filter multiply defined variables
      variableNames = sortUnique(variableNames)

      # Create the formated list of specific variables
      for name in variableNames:
            specificVars += "                 | \"%s\"\n" %(name)

      # 2/ Load the template lens
      tplFd = codecs.open(dirPrefix + templateFilename, encoding='utf-8')

      # 2.1/ Search for the pattern to replace
      outputText = tplFd.read()
      outputText = outputText.replace('@SPECIFIC_DRV_VARS@', specificVars)

      # 3/ Output final lens
      outFd = codecs.open(outputFilename, mode='w', encoding='utf-8')
      outFd.write(outputText)

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