SolutionAction.cc

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* SolutionAction.cc
 *
 * Easy-to use interface to the ZYPP dependency resolver
 *
 * Copyright (C) 2000-2002 Ximian, Inc.
 * Copyright (C) 2005 SUSE Linux Products GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * 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.
 */

#include "zypp/solver/detail/Resolver.h"
#include "zypp/solver/detail/SolutionAction.h"
#include "zypp/CapSet.h"
#include "zypp/base/Logger.h"
#include "zypp/Dependencies.h"


namespace zypp
{ 

  namespace solver
  { 

    namespace detail
    { 

using namespace std;

IMPL_PTR_TYPE(SolutionAction);
IMPL_PTR_TYPE(TransactionSolutionAction);
IMPL_PTR_TYPE(InjectSolutionAction);

//---------------------------------------------------------------------------

SolutionAction::SolutionAction()
{
}


SolutionAction::~SolutionAction()
{
}


//---------------------------------------------------------------------------

ostream &
TransactionSolutionAction::dumpOn( ostream& os) const
{
    os << "TransactionSolutionAction: ";
    switch (_action) {
        case KEEP:      os << "Keep"; break;
        case INSTALL:   os << "Install"; break;
        case REMOVE:    os << "Remove"; break;
        case UNLOCK:    os << "Unlock"; break;
        case ALLBRANCHES_ON:    os << "All branches on"; break;
        case ALLBRANCHES_OFF:   os << "All branches off"; break;            
        case DOUBLETIMEOUT:     os << "Double timeout"; break;
    }
    os << " ";
    os << _item;
    os << endl;
    return os;
}


ostream&
operator<<( ostream& os, const SolutionActionList & actionlist)
{
    for (SolutionActionList::const_iterator iter = actionlist.begin(); iter != actionlist.end(); ++iter) {
        os << *(*iter);
        os << endl;
    }
    return os;
}


ostream&
operator<<( ostream& os, const CSolutionActionList & actionlist)
{
    for (CSolutionActionList::const_iterator iter = actionlist.begin(); iter != actionlist.end(); ++iter) {
        os << *(*iter);
        os << endl;
    }
    return os;
}

//---------------------------------------------------------------------------

ostream &
InjectSolutionAction::dumpOn( ostream& os ) const
{
    os << "InjectSolutionAction: ";
    os << _capability;
    os << ", ";
    switch (_kind) {
        case REQUIRES:  os << "Requires"; break;
        case CONFLICTS: os << "Conflicts"; break;
        case OBSOLETES: os << "Obsoletes"; break;
        case INSTALLED: os << "Installed"; break;
        case ARCHITECTURE: os << "Architecture"; break;
        case VENDOR: os << "Vendor"; break;                 
        default: os << "Wrong kind"; break;
    }
    os << " ";
    os << _item;            
    os << endl;
    return os;
}

//---------------------------------------------------------------------------


ostream &
SolutionAction::dumpOn( std::ostream & os ) const
{
    os << "SolutionAction<";
    os << "not specified";
    os << "> ";
    return os;
}


bool 
TransactionSolutionAction::execute(Resolver & resolver) const
{
    bool ret = true;
    switch (action()) {
        case KEEP:
            resolver.addIgnoreInstalledItem( _item );
            /*FALLTHRU*/
        case INSTALL:
            if (_item.status().isToBeUninstalled())
                ret = _item.status().setTransact (false, ResStatus::USER);
            else
                _item.status().setToBeInstalled (ResStatus::USER);
            break;
        case REMOVE:
            if (_item.status().isToBeInstalled()) {
                _item.status().setTransact (false,ResStatus::USER);
                _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again          
            } else if (_item.status().isInstalled())
                _item.status().setToBeUninstalled (ResStatus::USER);
            else
                _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again          
            break;
        case UNLOCK:
            ret = _item.status().setLock (false, ResStatus::USER);
            if (!ret) ERR << "Cannot unlock " << _item << endl;
            break;
        case ALLBRANCHES_ON:
            resolver.setTryAllPossibilities (true);
            break;
        case ALLBRANCHES_OFF:
            resolver.setTryAllPossibilities (false);
            break;
        case DOUBLETIMEOUT:
            resolver.setTimeout (resolver.timeout()*2);
            break;          
        default:
            ERR << "Wrong TransactionKind" << endl;
            ret = false;
    }
    return ret;
}

bool
InjectSolutionAction::execute(Resolver & resolver) const
{
    Dependencies dependencies;
    CapSet depList;
    if (_item != PoolItem_Ref()) {    
        dependencies = _item.resolvable()->deps();
        depList = dependencies[Dep::CONFLICTS];
    }
    switch (_kind) {
        case CONFLICTS:
            // removing conflict in both resolvables
            for (CapSet::const_iterator iter = depList.begin(); iter != depList.end(); iter++) {
                if (iter->matches (_capability) == CapMatch::yes )
                {
                    resolver.addIgnoreConflict (_item, _capability);
                }
            }
            // Obsoletes are conflicts too
            depList = dependencies[Dep::OBSOLETES];
            for (CapSet::const_iterator iter = depList.begin(); iter != depList.end(); iter++) {
                if (iter->matches (_capability) == CapMatch::yes )
                {
                    resolver.addIgnoreConflict (_otherItem, _capability);
                }
            }
            
            dependencies = _otherItem.resolvable()->deps();
            depList = dependencies[Dep::CONFLICTS];
            for (CapSet::const_iterator iter = depList.begin(); iter != depList.end(); iter++) {
                if (iter->matches (_capability) == CapMatch::yes )
                {
                    resolver.addIgnoreConflict (_otherItem, _capability);
                }
            }
            // Obsoletes are conflicts too          
            depList = dependencies[Dep::OBSOLETES];
            for (CapSet::const_iterator iter = depList.begin(); iter != depList.end(); iter++) {
                if (iter->matches (_capability) == CapMatch::yes )
                {
                    resolver.addIgnoreConflict (_otherItem, _capability);
                }
            }
            
            break;
        case REQUIRES:
            // removing the requires dependency from the item
            if (_item == PoolItem_Ref()) {
                // this was a requirement via Resolver::addExtraCapability
                // so we have to delete it.
                resolver.removeExtraCapability (_capability);
            } else {
                resolver.addIgnoreRequires (_item, _capability);
            }
            break;
        case ARCHITECTURE:
            // This item is for ALL architectures available
            resolver.addIgnoreArchitectureItem (_item);
            break;
        case VENDOR:
            // This item is for ALL vendor available
            resolver.addIgnoreVendorItem (_item);
            break;                  
        case OBSOLETES:
            // removing the obsoletes dependency from the item
            resolver.addIgnoreObsoletes (_otherItem, _capability);
            break;          
        case INSTALLED:
            // ignoring already installed items
            resolver.addIgnoreInstalledItem (_item);
            resolver.addIgnoreInstalledItem (_otherItem);
            break;
        default:
            ERR << "No valid InjectSolutionAction kind found" << endl;
            return false;
    }

    return true;
}

    };// namespace detail
  };// namespace solver
};// namespace zypp

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