slpkg/slpkg/blacklist.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

# blacklist.py file is part of slpkg.

# Copyright 2014 Dimitris Zlatanidis <d.zlatanidis@gmail.com>
# All rights reserved.

# Utility for easy management packages in Slackware

# https://github.com/dslackw/slpkg

# Slpkg 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 3 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, see <http://www.gnu.org/licenses/>.

import os
from __metadata__ import bls_path

class BlackList(object):
    '''
    Blacklist class to add, remove or listed packages
    in blacklist file.
    '''
    def __init__(self):
        '''
        Initialization blacklist file if not exist in /etc/slpkg
        create it by default.
        '''
        blacklist_conf = [
                    "# This is the blacklist file. Each package listed here may not be\n",
                    "# installed be upgraded be find or deleted.\n",
                    "# NOTE: The settings here affect all repositories.\n",
                    "#\n",
                    "# An example syntax is as follows:\n",
                    "# add a package from SBo repository:\n",
                    "# brasero\n",
                    "#\n",
                    "# Add package from slackware repository:\n",
                    "# example add package 'wicd-1.7.2.4-x86_64-4.txz':\n",
                    "# wicd\n",
                    "#\n",
                    "# Sometimes the automatic kernel update creates problems because you\n",
                    "# may need to file intervention 'lilo'. The slpkg automatically detects\n", 
                    "# if the core has been upgraded and running 'lilo'. If you want to avoid\n",
                    "# any problems uncomment the lines below.\n",
                    "#\n",
                    "# kernel-firmware\n",
                    "# kernel-generic\n",
                    "# kernel-generic-smp\n",
                    "# kernel-headers\n",
                    "# kernel-huge\n",
                    "# kernel-huge-smp\n",
                    "# kernel-modules\n",
                    "# kernel-modules-smp\n",
                    "# kernel-source\n"
                    "#\n",
                    "#\n",
                    "# aaa_elflibs can't be updated.\n",
                    "aaa_elflibs\n"
                    ]
        self.blackfile = bls_path + "blacklist"
        if not os.path.exists(bls_path):
            os.mkdir(bls_path)
        if not os.path.isfile(self.blackfile):
            with open(self.blackfile, "w") as conf:
                for line in blacklist_conf:
                    conf.write(line)
                conf.close()
    
    def packages(self):
        '''
        Return blacklist packages from /etc/slpkg/blacklist 
        configuration file.
        '''
        blacklist = []
        with open(self.blackfile, "r") as black_conf:
            for read in black_conf:
                read = read.lstrip()
                if not read.startswith("#"):
                    blacklist.append(read.replace("\n", "")) 
            black_conf.close()
        return blacklist

    def listed(self):
        '''
        Print blacklist packages
        '''
        exit = 0
        print("\nPackages in blacklist:\n")
        for black in self.packages():
            if black:
                print(black)
                exit = 1
        if exit == 1:
            print # new line at exit

    def add(self, pkgs):
        '''
        Add blacklist packages if not exist
        '''
        exit = 0
        blacklist = self.packages()
        print("\nAdd packages in blacklist:\n")
        with open(self.blackfile, "a") as black_conf:
            for pkg in pkgs:
                if pkg not in blacklist:
                    print(pkg)
                    black_conf.write(pkg + "\n")
                    exit = 1
            black_conf.close()
        if exit == 1:
            print # new line at exit

    def remove(self, pkgs):
        '''
        Remove packages from blacklist
        '''
        exit = 0
        print("\nRemove packages from blacklist:\n")
        with open(self.blackfile, "r") as read_black_conf:
            lines = read_black_conf.read()
            read_black_conf.close()
        with open(self.blackfile, "w") as write_black_conf:
            for line in lines.splitlines():
                if line not in pkgs:
                    write_black_conf.write(line + "\n")
                else:
                    print(line)
                    exit = 1
            write_black_conf.close()
        if exit == 1:
            print # new line at exit