ClickHouse/programs/disks/CommandLink.cpp

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#include "ICommand.h"
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#include <Interpreters/Context.h>
namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
class CommandLink final : public ICommand
{
public:
CommandLink()
{
command_name = "link";
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description = "Create hardlink from `from_path` to `to_path`";
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usage = "link [OPTION]... <FROM_PATH> <TO_PATH>";
}
void processOptions(
Poco::Util::LayeredConfiguration &,
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po::variables_map &) const override
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{
}
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void execute(
const std::vector<String> & command_arguments,
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std::shared_ptr<DiskSelector> & disk_selector,
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Poco::Util::LayeredConfiguration & config) override
{
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if (command_arguments.size() != 2)
{
printHelpMessage();
throw DB::Exception(DB::ErrorCodes::BAD_ARGUMENTS, "Bad Arguments");
}
String disk_name = config.getString("disk", "default");
const String & path_from = command_arguments[0];
const String & path_to = command_arguments[1];
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DiskPtr disk = disk_selector->get(disk_name);
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String relative_path_from = validatePathAndGetAsRelative(path_from);
String relative_path_to = validatePathAndGetAsRelative(path_to);
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disk->createHardLink(relative_path_from, relative_path_to);
}
};
}
std::unique_ptr <DB::ICommand> makeCommandLink()
{
return std::make_unique<DB::CommandLink>();
}