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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2006, 2007, 2008, 2010, 2011 Ciaran McCreesh
*
* This file is part of the Paludis package manager. Paludis 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.
*
* Paludis 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 "use_desc.hh"
#include <paludis/name.hh>
#include <paludis/package_id.hh>
#include <paludis/util/is_file_with_extension.hh>
#include <paludis/util/pimp-impl.hh>
#include <paludis/util/stringify.hh>
#include <paludis/util/strip.hh>
#include <paludis/util/wrapped_forward_iterator.hh>
#include <paludis/util/config_file.hh>
#include <paludis/util/hashes.hh>
#include <paludis/util/sequence-impl.hh>
#include <paludis/util/fs_stat.hh>
#include <paludis/util/fs_path.hh>
#include <paludis/util/options.hh>
#include <paludis/choice.hh>
#include <unordered_map>
using namespace paludis;
template class Sequence<UseDescFileInfo>;
typedef std::unordered_map<std::pair<ChoicePrefixName, UnprefixedChoiceName>, std::string,
Hash<std::pair<ChoicePrefixName, UnprefixedChoiceName> > > UseDescs;
namespace paludis
{
template<>
struct Imp<UseDesc>
{
std::unordered_map<QualifiedPackageName, UseDescs, Hash<QualifiedPackageName> > local_descs;
UseDescs global_descs;
void add(const FSPath & f, const ChoicePrefixName & prefix)
{
if (f.stat().is_regular_file_or_symlink_to_regular_file())
{
LineConfigFile ff(f, { lcfo_disallow_continuations });
for (LineConfigFile::ConstIterator line(ff.begin()), line_end(ff.end()) ;
line != line_end ; ++line)
{
std::string::size_type p(line->find(" - "));
if (std::string::npos == p)
continue;
std::string lhs(line->substr(0, p)), rhs(line->substr(p + 3));
std::string::size_type q(lhs.find(':'));
if (std::string::npos == q)
global_descs.insert(make_pair(make_pair(prefix, lhs), rhs));
else
local_descs[QualifiedPackageName(lhs.substr(0, q))].insert(make_pair(make_pair(prefix, lhs.substr(q + 1)), rhs));
}
}
}
Imp(const std::shared_ptr<const UseDescFileInfoSequence> & f)
{
for (UseDescFileInfoSequence::ConstIterator ff(f->begin()), ff_end(f->end()) ;
ff != ff_end ; ++ff)
add(ff->first, ff->second);
}
};
}
UseDesc::UseDesc(const std::shared_ptr<const UseDescFileInfoSequence> & f) :
_imp(f)
{
}
UseDesc::~UseDesc()
{
}
const std::string
UseDesc::describe(
const QualifiedPackageName & id,
const ChoicePrefixName & prefix,
const UnprefixedChoiceName & flag
) const
{
std::unordered_map<QualifiedPackageName, UseDescs, Hash<QualifiedPackageName> >::const_iterator i(_imp->local_descs.find(id));
if (i != _imp->local_descs.end())
{
UseDescs::const_iterator j(i->second.find(std::make_pair(prefix, flag)));
if (j != i->second.end())
return j->second;
}
UseDescs::const_iterator j(_imp->global_descs.find(std::make_pair(prefix, flag)));
if (j != _imp->global_descs.end())
return j->second;
return "";
}
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