#!/usr/bin/env python

# Poolify (move packages from "legacy" type locations to pool locations)
# Copyright (C) 2000, 2001  James Troup <james@nocrew.org>
# $Id: catherine,v 1.9 2001-06-05 22:30:43 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

# "Welcome to where time stands still,
#  No one leaves and no one will."
#   - Sanitarium - Metallica / Master of the puppets

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

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

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

Cnf = None;
projectB = None;

# Q is a python-postgresql query result set and must have the
# following four columns:
#  o files.id (as 'files_id')
#  o files.filename
#  o location.path
#  o component.name (as 'component')
#
# limit is a value in bytes or -1 for no limit (use with care!)
# verbose and no_action are booleans

def poolize (q, limit, verbose, no_action):
    poolized_size = 0L;
    poolized_count = 0;

    # Parse -l/--limit argument
    qd = q.dictresult();
    for qid in qd:
        legacy_filename = qid["path"]+qid["filename"];
        size = os.stat(legacy_filename)[stat.ST_SIZE];
        if (poolized_size + size) > limit and limit >= 0:
            sys.stderr.write("Hit %s limit.\n" % (utils.size_type(limit)));
            break;
        poolized_size = poolized_size + size;
        poolized_count = poolized_count + 1;
        base_filename = os.path.basename(legacy_filename);
        destination_filename = base_filename;
        # Work out the source package name
        if utils.re_isadeb.match(base_filename) != None:
            control = apt_pkg.ParseSection(apt_inst.debExtractControl(utils.open_file(legacy_filename,"r")))
            package = control.Find("Package", "");
            source = control.Find("Source", package);
            if string.find(source, "(") != -1:
                m = utils.re_extract_src_version.match(source)
                source = m.group(1)
            # If it's a binary, we need to also rename the file to include the architecture
            version = control.Find("Version", "");
            architecture = control.Find("Architecture", "");
            if package == "" or version == "" or architecture == "":
                sys.stderr.write("%s: couldn't determine required information to rename .deb file.\n" % (legacy_filename));
                sys.exit(1);
            version = utils.re_no_epoch.sub('', version);
            destination_filename = "%s_%s_%s.deb" % (package, version, architecture);
        else:
            m = utils.re_issource.match(base_filename)
            if m != None:
                source = m.group(1);
            else:
                sys.stderr.write("%s: say what?\n" % (legacy_filename));
                sys.exit(1);
        # Work out the component name
        component = qid["component"];
        if component == "":
            q = projectB.query("SELECT DISTINCT(c.name) FROM override o, component c WHERE o.package = '%s' AND o.component = c.id;" % (source));
            ql = q.getresult();
            if ql == []:
                sys.stderr.write("%s: No override match so I can't work out the component.\n" % (source));
                sys.exit(1);
            if len(ql) > 1:
                sys.stderr.write("%s: multiple override matches for %s so I can't work out the component.\n" % (source));
                sys.exit(1);
            component = ql[0][0];
        # Work out the new location
        q = projectB.query("SELECT l.id FROM location l, component c WHERE c.name = '%s' AND c.id = l.component AND l.type = 'pool';" % (component));
        ql = q.getresult();
        if len(ql) != 1:
            sys.stderr.write("%s: couldn't determine location ID, query returned %d matches and not 1 as expected.\n" % (source, len(ql)));
            sys.exit(1);
        location_id = ql[0][0];
        # First move the files to the new location
        pool_location = utils.poolify (source, component);
        pool_filename = pool_location + destination_filename;
        destination = Cnf["Dir::PoolDir"] + pool_location + destination_filename;
        if os.path.exists(destination):
            sys.stderr.write("%s: already exists in the pool; serious FUBARity.\n" % (legacy_filename));
            sys.exit(1);
        if verbose:
            print "Moving: %s -> %s" % (legacy_filename, destination);
        if not no_action:
            utils.move(legacy_filename, destination);
        # Then Update the DB's files table
        if verbose:
            print "SQL: UPDATE files SET filename = '%s', location = '%s' WHERE id = '%s'" % (pool_filename, location_id, qid["files_id"]);
        if not no_action:
            q = projectB.query("UPDATE files SET filename = '%s', location = '%s' WHERE id = '%s'" % (pool_filename, location_id, qid["files_id"]));

    sys.stderr.write("Poolized %s in %s files.\n" % (utils.size_type(poolized_size), poolized_count));
    
################################################################################

def main ():
    global Cnf, projectB;

    apt_pkg.init();
    
    Cnf = apt_pkg.newConfiguration();
    apt_pkg.ReadConfigFileISC(Cnf,utils.which_conf_file());

    Arguments = [('D',"debug","Catherine::Options::Debug", "IntVal"),
                 ('h',"help","Catherine::Options::Help"),
                 ('V',"version","Catherine::Options::Version"),
                 ('l',"limit", "Catherine::Options::Limit", "HasArg"),
                 ('n',"no-action","Catherine::Options::No-Action"),
                 ('v',"verbose","Catherine::Options::Verbose")];

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

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

    if not Options["Limit"]:
        limit = -1;
    else:
        limit = int(Options["Limit"]) * 1024;

    # -n/--no-action implies -v/--verbose
    if Options["No-Action"]:
        Options["Verbose"] = "true";

    # Sanity check the limit argument
    if limit > 0 and limit < 1024:
        sys.stderr.write("-l/--limit takes an argument with a value in kilobytes.\n");
        sys.exit(1);

    # Grab a list of all files not already in the pool
    q = projectB.query("""
SELECT l.path, f.filename, f.id as files_id, c.name as component 
   FROM files f, location l, component c WHERE 
    NOT EXISTS (SELECT * FROM location l WHERE l.type = 'pool' AND f.location = l.id) 
    AND NOT (f.filename ~ '^potato') AND f.location = l.id AND l.component = c.id 
UNION SELECT l.path, f.filename, f.id as files_id, null as component
   FROM files f, location l WHERE 
    NOT EXISTS (SELECT * FROM location l WHERE l.type = 'pool' AND f.location = l.id) 
    AND NOT (f.filename ~ '^potato') AND f.location = l.id AND NOT EXISTS 
     (SELECT l.path FROM location l WHERE l.component IS NOT NULL AND f.location = l.id);""");

    poolize(q, limit, Options["Verbose"], Options["No-Action"]);

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

if __name__ == '__main__':
    main()