ConfigFile.py

   1 #
   2 # Stuff for dealing with configuration files.
   3 #
   4 #
   5 # This code is part of the LWN git data miner.
   6 #
   7 # Copyright 2007-8 LWN.net
   8 # Copyright 2007-8 Jonathan Corbet <corbet@lwn.net>
   9 #
  10 # This file may be distributed under the terms of the GNU General
  11 # Public License, version 2.
  12 #
  13 import sys, re, datetime
  14 import database
  15
  16 #
  17 # Read a line and strip out junk.
  18 #
  19 def ReadConfigLine (file):
  20     line = file.readline ()
  21     if not line:
  22         return None
  23     line = line.split('#')[0] # Get rid of any comments
  24     line = line.strip () # and extra white space
  25     if len (line) == 0: # we got rid of everything
  26         return ReadConfigLine (file)
  27     return line
  28
  29 #
  30 # Give up and die.
  31 #
  32 def croak (message):
  33     sys.stderr.write (message + '\n')
  34     sys.exit (1)
  35
  36 #
  37 # Read a list of email aliases.
  38 #
  39 def ReadEmailAliases (name):
  40     try:
  41         file = open (name, 'r')
  42     except IOError:
  43         croak ('Unable to open email alias file %s' % (name))
  44     line = ReadConfigLine (file)
  45     while line:
  46         sline = line.split ()
  47         if len (sline) != 2:
  48             croak ('Funky email alias line "%s"' % (line))
  49         if sline[0].index ('@') <= 0 or sline[1].index ('@') <= 0:
  50             croak ('Non-addresses in email alias "%s"' % (line))
  51         database.AddEmailAlias (sline[0], sline[1])
  52         line = ReadConfigLine (file)
  53     file.close ()
  54
  55 #
  56 # The Email/Employer map
  57 #
  58 EMMpat = re.compile (r'^([^\s]+)\s+([^<]+)\s*(<\s*(\d+-\d+-\d+)\s*)?$')
  59
  60 def ReadEmailEmployers (name):
  61     try:
  62         file = open (name, 'r')
  63     except IOError:
  64         croak ('Unable to open email/employer file %s' % (name))
  65     line = ReadConfigLine (file)
  66     while line:
  67         m = EMMpat.match (line)
  68         if not m:
  69             croak ('Funky email/employer line "%s"' % (line))
  70         email = m.group (1)
  71         company = m.group (2).strip ()
  72         enddate = ParseDate (m.group (4))
  73         database.AddEmailEmployerMapping (email, company, enddate)
  74         line = ReadConfigLine (file)
  75     file.close ()
  76
  77 def ParseDate (cdate):
  78     if not cdate:
  79         return None
  80     sdate = cdate.split ('-')
  81     return datetime.date (int (sdate[0]), int (sdate[1]), int (sdate[2]))
  82
  83
  84 def ReadGroupMap (fname, employer):
  85     try:
  86         file = open (fname, 'r')
  87     except IOError:
  88         croak ('Unable to open group map file %s' % (fname))
  89     line = ReadConfigLine (file)
  90     while line:
  91         database.AddEmailEmployerMapping (line, employer)
  92         line = ReadConfigLine (file)
  93     file.close ()
  94
  95 #
  96 # Read an overall config file.
  97 #
  98 def ConfigFile (name):
  99     try:
 100         file = open (name, 'r')
 101     except IOError:
 102         croak ('Unable to open config file %s' % (name))
 103     line = ReadConfigLine (file)
 104     while line:
 105         sline = line.split ()
 106         if len (sline) < 2:
 107             croak ('Funky config line: "%s"' % (line))
 108         if sline[0] == 'EmailAliases':
 109             ReadEmailAliases (sline[1])
 110         elif sline[0] == 'EmailMap':
 111             ReadEmailEmployers (sline[1])
 112         elif sline[0] == 'GroupMap':
 113             if len (sline) != 3:
 114                 croak ('Funky group map line "%s"' % (line))
 115             ReadGroupMap (sline[1], sline[2])
 116         else:
 117             croak ('Unrecognized config line: "%s"' % (line))
 118         line = ReadConfigLine (file)
 119