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#
# Stuff for dealing with configuration files.
#
#
# This code is part of the LWN git data miner.
#
# Copyright 2007-11 Eklektix, Inc.
# Copyright 2007-11 Jonathan Corbet <corbet@lwn.net>
#
# This file may be distributed under the terms of the GNU General
# Public License, version 2.
#
import sys, re, datetime, os.path
import database
class ReadConfigLine:
"""
ReadConfigLine provides a iterator to extract line
from an config file without comments.
Typical use case:
fd = open(filename, 'r')
for line in ReadConfigLine(fd):
parse_line(line)
fd.close(fd)
"""
def __init__(self, fd):
self.fd = fd
self.buffer = None
self.patch = []
def __iter__(self):
return self
def next(self):
line = self.fd.readline()
while line:
line = line.split('#')[0] # Get rid of any comments
line = line.strip() # and extra white space
if len(line) == 0: # we got rid of everything
line = self.fd.readline()
else:
break
if not line:
raise StopIteration
return line
#
# Give up and die.
#
def croak (message):
sys.stderr.write (message + '\n')
sys.exit (1)
#
# Read a list of email aliases.
#
def ReadEmailAliases (name):
try:
fd = open (name, 'r')
except IOError:
croak ('Unable to open email alias file %s' % (name))
for line in ReadConfigLine (fd):
m = re.match ('^("[^"]+"|\S+)\s+(.+)$', line)
if not m or len (m.groups ()) != 2:
croak ('Funky email alias line "%s"' % (line))
if m and m.group (2).find ('@') <= 0:
croak ('Non-addresses in email alias "%s"' % (line))
database.AddEmailAlias (m.group (1).replace ('"', ''), m.group (2))
fd.close ()
#
# The Email/Employer map
#
EMMpat = re.compile (r'^([^\s]+)\s+([^<]+)\s*(<\s*(\d+-\d+-\d+)\s*)?$')
def ReadEmailEmployers (name):
try:
fd = open (name, 'r')
except IOError:
croak ('Unable to open email/employer file %s' % (name))
for line in ReadConfigLine (fd):
m = EMMpat.match (line)
if not m:
croak ('Funky email/employer line "%s"' % (line))
email = m.group (1)
company = m.group (2).strip ()
enddate = ParseDate (m.group (4))
database.AddEmailEmployerMapping (email, company, enddate)
fd.close ()
def ParseDate (cdate):
if not cdate:
return None
sdate = cdate.split ('-')
return datetime.date (int (sdate[0]), int (sdate[1]), int (sdate[2]))
def ReadGroupMap (fname, employer):
try:
fd = open (fname, 'r')
except IOError:
croak ('Unable to open group map file %s' % (fname))
for line in ReadConfigLine (fd):
database.AddEmailEmployerMapping (line, employer)
fd.close ()
#
# Read in a virtual employer description.
#
def ReadVirtual (fd, name):
ve = database.VirtualEmployer (name)
for line in ReadConfigLine (fd):
sl = line.split (None, 1)
first = sl[0]
if first == 'end':
ve.store ()
return
#
# Zap the "%" syntactic sugar if it's there
#
if first[-1] == '%':
first = first[:-1]
try:
percent = int (first)
except ValueError:
croak ('Bad split value "%s" for virtual empl %s' % (first, name))
if not (0 < percent <= 100):
croak ('Bad split value "%s" for virtual empl %s' % (first, name))
ve.addsplit (' '.join (sl[1:]), percent/100.0)
#
# We should never get here
#
croak ('Missing "end" line for virtual employer %s' % (name))
#
# Read file type patterns for more fine graned reports
#
def ReadFileType (filename):
try:
fd = open (filename, 'r')
except IOError:
croak ('Unable to open file type mapping file %s' % (filename))
patterns = {}
order = []
regex_order = re.compile ('^order\s+(.*)$')
regex_file_type = re.compile ('^filetype\s+(\S+)\s+(.+)$')
for line in ReadConfigLine (fd):
o = regex_order.match (line)
if o:
# Consider only the first definition in the config file
elements = o.group(1).replace (' ', '')
order = order or elements.split(',')
continue
m = regex_file_type.match (line)
if not m or len (m.groups ()) != 2:
ConfigFile.croak ('Funky file type line "%s"' % (line))
if not patterns.has_key (m.group (1)):
patterns[m.group (1)] = []
if m.group (1) not in order:
print '%s not found, appended to the last order' % m.group (1)
order.append (m.group (1))
patterns[m.group (1)].append (re.compile (m.group (2), re.IGNORECASE))
fd.close ()
return patterns, order
#
# Read an overall config file.
#
def ConfigFile (name, confdir):
try:
fd = open (name, 'r')
except IOError:
croak ('Unable to open config file %s' % (name))
for line in ReadConfigLine (fd):
sline = line.split (None, 2)
if len (sline) < 2:
croak ('Funky config line: "%s"' % (line))
if sline[0] == 'EmailAliases':
ReadEmailAliases (os.path.join (confdir, sline[1]))
elif sline[0] == 'EmailMap':
ReadEmailEmployers (os.path.join (confdir, sline[1]))
elif sline[0] == 'GroupMap':
if len (sline) != 3:
croak ('Funky group map line "%s"' % (line))
ReadGroupMap (os.path.join (confdir, sline[1]), sline[2])
elif sline[0] == 'VirtualEmployer':
ReadVirtual (file, ' '.join (sline[1:]))
elif sline[0] == 'FileTypeMap':
patterns, order = ReadFileType (os.path.join (confdir, sline[1]))
database.FileTypes = database.FileType (patterns, order)
else:
croak ('Unrecognized config line: "%s"' % (line))
if __name__ == '__main__':
'''Test the iterato for reading configuration files'''
try:
fd = open(sys.argv[1])
except:
croak('Usage: %s <config-file>' % sys.argv[0])
for line in ReadConfigLine(fd):
print line
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