ClickHouse/programs/disks/CommandLink.cpp

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#pragma once
#include "ICommand.h"
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#include <Interpreters/Context.h>
namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
class CommandLink : public ICommand
{
public:
CommandLink()
{
command_name = "link";
description = "Create hardlink from `from_path` to `to_path`\nPath should be in format './' or './path' or '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,
DB::ContextMutablePtr & global_context,
Poco::Util::LayeredConfiguration & config) override
{
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if (command_arguments.size() != 2)
{
printHelpMessage();
throw DB::Exception("Bad Arguments", DB::ErrorCodes::BAD_ARGUMENTS);
}
String disk_name = config.getString("disk", "default");
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String path_from = command_arguments[0];
String path_to = command_arguments[1];
DiskPtr disk = global_context->getDisk(disk_name);
String full_path_from = fullPathWithValidate(disk, path_from);
String full_path_to = fullPathWithValidate(disk, path_to);
disk->createHardLink(full_path_from, full_path_to);
}
};
}
std::unique_ptr <DB::ICommand> makeCommandLink()
{
return std::make_unique<DB::CommandLink>();
}