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#!/usr/bin/python
#
# This program is meant to be called by the debian installer in order to
# create configuration files for the hwtest package and derived packages
# based on the preseed values.
import os
import re
import sys
from ConfigParser import ConfigParser
from optparse import OptionParser
from debconf import Debconf, DebconfCommunicator
DEFAULT_SECTION = "DEFAULT"
class Config(ConfigParser):
def write(self, fp):
"""Write an .ini-format representation of the configuration state."""
if self._defaults:
fp.write("[%s]\n" % DEFAULT_SECTION)
defaults = dict(self._defaults)
# Write includes first
if 'includes' in defaults:
key = 'includes'
value = defaults.pop(key)
value = str(value).replace('\n', '\n\t')
fp.write("%s = %s\n" % (key, value))
for (key, value) in defaults.items():
value = str(value).replace('\n', '\n\t')
fp.write("%s = %s\n" % (key, value))
fp.write("\n")
for section in self._sections:
fp.write("[%s]\n" % section)
for (key, value) in self._sections[section].items():
if key != "__name__":
fp.write("%s = %s\n" %
(key, str(value).replace('\n', '\n\t')))
fp.write("\n")
class Install(object):
"""Install module for generating hwtest configuration files.
The hwtest module and derivatives use a configuration file format
compatible with ConfigParser. The values for the keys defined in
this file can be preseeded during the installation of the package by
using this module during the config phase of the package installation
process.
"""
separator = "/"
configs_base = "/usr/share/%(base_name)s/configs/%(name)s.ini"
examples_base = "/usr/share/%(base_name)s/examples/%(name)s.ini"
templates_base = "/var/lib/dpkg/info/%(name)s.templates"
def __init__(self, name, configs_path=None, examples_path=None,
templates_path=None):
self.name = name
self.base_name = re.sub(r"(-cli|-gtk)$", "", name)
self._configs_path = configs_path or self.configs_base \
% {"name": name, "base_name": self.base_name}
self._examples_path = examples_path or self.examples_base \
% {"name": name, "base_name": self.base_name}
self._templates_path = templates_path or self.templates_base \
% {"name": name, "base_name": self.base_name}
self._config = Config()
if os.environ.get("DEBIAN_HAS_FRONTEND"):
if os.environ.get("DEBCONF_REDIR"):
write = os.fdopen(3, "w")
else:
write = sys.stdout
self._debconf = Debconf(write=write)
else:
self._debconf = DebconfCommunicator(self.name)
def write(self, descriptor):
"""
Write phase of the config process which takes a descriptor
as argument.
"""
for path in [self._examples_path, self._configs_path]:
if path and os.path.isfile(path):
self._config.read(path)
# Hack to retrieve questions from templates file
if os.path.exists(self._templates_path):
templates_descriptor = file(self._templates_path)
for line in templates_descriptor.readlines():
match = re.match(r"Template: (.*)", line)
if match:
question = match.group(1)
value = self._debconf.get(question)
section, name = question.rsplit(self.separator, 1)
self._config.set(section, name, value)
# Write config file
self._config.write(descriptor)
def main(args):
"""
Main routine for running this script. The arguments are:
package_name Name of the package to configure.
optional Optional arguments specific to the given command.
"""
parser = OptionParser()
parser.add_option("-o", "--output",
default="-",
help="Output file, - for stdout.")
(options, args) = parser.parse_args(args)
if len(args) < 1:
return 1
package = args.pop(0)
install = Install(package)
if options.output == "-":
descriptor = sys.stdout
else:
descriptor = file(options.output, "w")
install.write(descriptor)
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))
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