configs/kread.py

   1 #!/bin/env python
   2 #
   3 # compare: a tool to compare kernel config files
   4 #
   5 # Marc E. Fiuczynski <mef@cs.princeton.edu>
   6 # Copyright (C) 2006 The Trustees of Princeton University
   7 #
   8 # $Id: kread.py,v 1.2 2006/12/01 02:40:40 mef Exp $
   9 #
  10
  11 import sys, re, os
  12
  13 currentconfig = ""
  14 configs = {}
  15
  16 def _config(parts,fb):
  17     global currentconfig
  18     currentconfig = parts[1]
  19
  20 def _help(parts,fb):
  21     global currentconfig
  22     helptxt = ""
  23     lineno = 0
  24     while True:
  25         line = fb.readline()
  26         lineno = lineno + 1
  27         if len(line)==0 or not line[0].isspace():break
  28         if len(line)>1: line = line.lstrip()
  29         helptxt = helptxt+line
  30
  31     configs[currentconfig]=helptxt
  32
  33 def _source(parts,fb):
  34     filename = "".join(parts[1:])
  35     if filename[0]=='"' or filename[0]=='\'':
  36         filename=filename[1:]
  37     if filename[-1]=='"' or filename[-1]=='\'':
  38         filename=filename[:-1]
  39     process(filename)
  40
  41 def _noop(parts,fb):
  42     pass
  43
  44 keywords = {"config":_config,
  45             "help":_help,
  46             "---help---":_help,
  47             "source":_source,
  48             "#":_noop}
  49
  50 def process(filename):
  51     fb = open(filename)
  52     lineno = 0
  53     while True:
  54         line = fb.readline()
  55         lineno = lineno + 1
  56         if len(line)==0:break
  57
  58         line  = line.strip()
  59         parts = line.split()
  60         if len(parts)==0:continue
  61
  62         func  = keywords.get(parts[0],_noop)
  63         func(parts,fb)
  64
  65     fb.close()
  66
  67 initialized = False
  68 def init():
  69     if not initialized:
  70         initialized = True
  71         ARCH=os.getenv("ARCH","i386")
  72         process("arch/%s/Kconfig" % ARCH)
  73
  74 def gethelp(option):
  75     if option[:len("CONFIG_")] == "CONFIG_":
  76         option=option[len("CONFIG_"):]
  77     init()
  78     helptxt = configs.get(option,"")
  79     return helptxt
  80
  81
  82 if __name__ == '__main__':
  83     if len(sys.argv) == 1:
  84         print """USAGE\n%s configoptionname""" % os.path.basename(sys.argv[0])
  85     else:
  86         option = sys.argv[1]
  87         init()
  88         helptxt = gethelp(option)
  89         print "CONFIG_%s:\n%s" % (option,helptxt)
  90