#!/usr/bin/env python

# Dependency check proposed-updates
# Copyright (C) 2001, 2002  James Troup <james@nocrew.org>
# $Id: jeri,v 1.5 2002-05-08 11:13:02 troup Exp $

# This program 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

################################################################################

# <aj> ARRRGGGHHH
# <aj> what's wrong with me!?!?!?
# <aj> i was just nice to some mormon doorknockers!!!
# <Omnic> AJ?!?!
# <aj> i know!!!!!
# <Omnic> I'm gonna have to kick your ass when you come over
# <Culus> aj: GET THE HELL OUT OF THE CABAL! :P

################################################################################

import pg, sys, os, string
import utils, db_access
import apt_pkg, apt_inst;

################################################################################

Cnf = None;
projectB = None;
Options = None;
stable = {};
stable_virtual = {};
architectures = None;

################################################################################

def usage (exit_code=0):
    print """Usage: jeri [OPTION] <CHANGES FILE | DEB FILE | ADMIN FILE>[...]
Remove obsolete changes files from proposed-updates.

  -q, --quiet                be quieter about what is being done
  -v, --verbose              be more verbose about what is being done
  -h, --help                 show this help and exit

Need either changes files, deb files or an admin.txt file with a '.joey' suffix."""
    sys.exit(exit_code)

################################################################################

def pp_dep (deps):
    pp_deps = [];
    for atom in deps:
        (pkg, version, constraint) = atom;
        if constraint:
            pp_dep = "%s (%s %s)" % (pkg, constraint, version);
        else:
            pp_dep = pkg;
        pp_deps.append(pp_dep);
    return string.join(pp_deps, " |");

################################################################################

def d_test (dict, key, positive, negative):
    if not dict:
        return negative;
    if dict.has_key(key):
        return positive;
    else:
        return negative;

################################################################################

def check_dep (depends, dep_type, check_archs, filename, files):
    pkg_unsat = 0;
    for arch in check_archs:
        for parsed_dep in apt_pkg.ParseDepends(depends):
            unsat = [];
            for atom in parsed_dep:
                (dep, version, constraint) = atom;
                # As a real package?
                if stable.has_key(dep):
                    if stable[dep].has_key(arch):
                        if apt_pkg.CheckDep(stable[dep][arch], constraint, version):
                            if Options["debug"]:
                                print "Found %s as a real package." % (pp_dep(parsed_dep));
                            unsat = 0;
                            break;
                # As a virtual?
                if stable_virtual.has_key(dep):
                    if stable_virtual[dep].has_key(arch):
                        if not constraint and not version:
                            if Options["debug"]:
                                print "Found %s as a virtual package." % (pp_dep(parsed_dep));
                            unsat = 0;
                            break;
                # As part of the same .changes?
                epochless_version = utils.re_no_epoch.sub('', version)
                dep_filename = "%s_%s_%s.deb" % (dep, epochless_version, arch);
                if files.has_key(dep_filename):
                    if Options["debug"]:
                        print "Found %s in the same upload." % (pp_dep(parsed_dep));
                    unsat = 0;
                    break;
                # Not found...
                # [FIXME: must be a better way ... ]
                error = "%s not found. [Real: " % (pp_dep(parsed_dep))
                if stable.has_key(dep):
                    if stable[dep].has_key(arch):
                        error = error + "%s:%s:%s" % (dep, arch, stable[dep][arch]);
                    else:
                        error = error + "%s:-:-" % (dep);
                else:
                    error = error + "-:-:-";
                error = error + ", Virtual: ";
                if stable_virtual.has_key(dep):
                    if stable_virtual[dep].has_key(arch):
                        error = error + "%s:%s" % (dep, arch);
                    else:
                        error = error + "%s:-";
                else:
                    error = error + "-:-";
                error = error + ", Upload: ";
                if files.has_key(dep_filename):
                    error = error + "yes";
                else:
                    error = error + "no";
                error = error + "]";
                unsat.append(error);

            if unsat:
                sys.stderr.write("MWAAP! %s: '%s' %s can not be satisifed:\n" % (filename, pp_dep(parsed_dep), dep_type));
                for error in unsat:
                    sys.stderr.write("  %s\n" % (error));
                pkg_unsat = 1;

    return pkg_unsat;

def check_package(filename, files):
    try:
        control = apt_pkg.ParseSection(apt_inst.debExtractControl(utils.open_file(filename)));
    except:
        utils.warn("%s: debExtractControl() raised %s." % (filename, sys.exc_type));
        return 1;
    Depends = control.Find("Depends");
    Pre_Depends = control.Find("Pre-Depends");
    #Recommends = control.Find("Recommends");
    pkg_arch = control.Find("Architecture");
    base_file = os.path.basename(filename);
    if pkg_arch == "all":
        check_archs = architectures;
    else:
        check_archs = [pkg_arch];

    pkg_unsat = 0;
    if Pre_Depends:
        pkg_unsat = pkg_unsat + check_dep(Pre_Depends, "pre-dependency", check_archs, base_file, files);

    if Depends:
        pkg_unsat = pkg_unsat + check_dep(Depends, "dependency", check_archs, base_file, files);
    #if Recommends:
    #pkg_unsat = pkg_unsat + check_dep(Recommends, "recommendation", check_archs, base_file, files);

    return pkg_unsat;

################################################################################

def pass_fail (filename, result):
    if not Options["quiet"]:
        print "%s:" % (os.path.basename(filename)),
        if result:
            print "FAIL";
        else:
            print "ok";

################################################################################

def check_changes (filename):
    try:
        changes = utils.parse_changes(filename, 0)
        files = utils.build_file_list(changes, "");
    except:
        utils.warn("Error parsing changes file '%s'" % (filename));
        return;

    result = 0;

    # Move to the pool directory
    cwd = os.getcwd();
    file = files.keys()[0];
    pool_dir = Cnf["Dir::Pool"] + '/' + utils.poolify(changes["source"], files[file]["component"]);
    os.chdir(pool_dir);

    changes_result = 0;
    for file in files.keys():
        if file[-4:] == ".deb":
            result = check_package(file, files);
            if Options["verbose"]:
                pass_fail(file, result);
            changes_result = changes_result + result;

    pass_fail (filename, changes_result);

    # Move back
    os.chdir(cwd);

################################################################################

def check_deb (filename):
    result = check_package(filename, {});
    pass_fail(filename, result);


################################################################################

def check_joey (filename):
    file = utils.open_file(filename);

    cwd = os.getcwd();
    os.chdir("%s/dists/proposed-updates" % (Cnf["Dir::Root"]));

    for line in file.readlines():
        line = line[:-1];
        if string.find(line, 'install') != -1:
            split_line = string.split(line);
            install_type = split_line[0];
            if [ "install", "install-u", "sync-install" ].count(install_type) == 0:
                utils.fubar("Unknown install type ('%s') from: %s" % (install_type, line));
            changes_filename = split_line[1]
            if len(split_line) != 2:
                utils.fubar("Parse error (more than 2 elements): %s" % (line));
            if Options["debug"]:
                print "Processing %s..." % (changes_filename);
            check_changes(changes_filename);

    os.chdir(cwd);

################################################################################

def parse_packages():
    global stable, stable_virtual, architectures;

    # Parse the Packages files (since it's a sub-second operation on auric)
    suite = "stable";
    stable = {};
    components = Cnf.SubTree("Suite::%s::Components" % (suite)).List();
    architectures = Cnf.SubTree("Suite::%s::Architectures" % (suite)).List();
    for arch in [ "source", "all" ]:
        if architectures.count(arch):
            architectures.remove(arch);
    for component in components:
        for architecture in architectures:
            filename = "%s/dists/%s/%s/binary-%s/Packages" % (Cnf["Dir::Root"], suite, component, architecture);
            packages = utils.open_file(filename, 'r');
            Packages = apt_pkg.ParseTagFile(packages);
            while Packages.Step():
                package = Packages.Section.Find('Package');
                version = Packages.Section.Find('Version');
                provides = Packages.Section.Find('Provides');
                if not stable.has_key(package):
                    stable[package] = {};
                stable[package][architecture] = version;
                if provides:
                    for virtual_pkg in string.split(provides,","):
                        virtual_pkg = string.strip(virtual_pkg);
                        if not stable_virtual.has_key(virtual_pkg):
                            stable_virtual[virtual_pkg] = {};
                        stable_virtual[virtual_pkg][architecture] = "NA";

################################################################################

def main ():
    global Cnf, projectB, Options;

    Cnf = utils.get_conf()

    Arguments = [('q',"quiet","Jeri::Options::Quiet"),
                 ('v',"verbose","Jeri::Options::Verbose"),
                 ('h',"help","Jeri::Options::Help")];
    for i in [ "quiet", "verbose", "help" ]:
	if not Cnf.has_key("Jeri::Options::%s" % (i)):
	    Cnf["Jeri::Options::%s" % (i)] = "";

    arguments = apt_pkg.ParseCommandLine(Cnf,Arguments,sys.argv);
    Options = Cnf.SubTree("Jeri::Options")

    if Options["Help"]:
        usage(0);
    if not arguments:
        utils.fubar("need at least one package name as an argument.");

    projectB = pg.connect(Cnf["DB::Name"], Cnf["DB::Host"], int(Cnf["DB::Port"]));
    db_access.init(Cnf, projectB);

    print "Parsing packages files...",
    parse_packages();
    print "done.";

    for file in arguments:
        if file[-8:] == ".changes":
            check_changes(file);
        elif file[-4:] == ".deb":
            check_deb(file);
        elif file[-5:] == ".joey":
            check_joey(file);
        else:
            utils.fubar("Unrecognised file type: '%s'." % (file));

#######################################################################################

if __name__ == '__main__':
    main()