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/**************************************************************************
* Copyright (C) 2010 by Eugene V. Lyubimkin *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License *
* (version 3 or above) 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 GPL *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA *
**************************************************************************/
#include <unistd.h>
#include <cupt/common.hpp>
#include <cupt/download/uri.hpp>
#include <cupt/download/method.hpp>
#include <cupt/download/methodfactory.hpp>
namespace cupt {
class DebdeltaMethod: public download::Method
{
string perform(const Config& config, const download::Uri& uri,
const string& targetPath, const std::function< void (const vector< string >&) >& callback)
{
auto deltaCallback = [callback](const vector< string >& params)
{
if (!params.empty() && params[0] == "expected-size")
{
auto uiSizeParams = params;
uiSizeParams[0] = "ui-size";
callback(uiSizeParams);
}
else
{
callback(params);
}
};
// download delta file
auto deltaUri = uri.getOpaque();
auto deltaDownloadPath = targetPath + ".delta";
download::MethodFactory methodFactory(config);
auto method = methodFactory.getDownloadMethodForUri(deltaUri);
auto deltaDownloadResult = method->perform(config, deltaUri, deltaDownloadPath, deltaCallback);
delete method;
if (!deltaDownloadResult.empty())
{
return format2(__("delta download failed: %s"), deltaDownloadResult);
}
// invoking a deb patcher
auto patchCommand = format2("debpatch --accept-unsigned %s / %s >/dev/null",
deltaDownloadPath, targetPath);
auto patchResult = ::system(patchCommand.c_str());
// remove delta anyway
if (unlink(deltaDownloadPath.c_str()) == -1)
{
warn2e(__("unable to remove the file '%s'"), deltaDownloadPath);
}
if (patchResult != 0)
{
return format2(__("debpatch returned error code %d"), patchResult);
}
// all went ok
return string();
}
};
}
extern "C"
{
cupt::download::Method* construct()
{
return new cupt::DebdeltaMethod();
}
}
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