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// Copyright Epic Games, Inc. All Rights Reserved.
#include "copy_cmd.h"
#include <zencore/filesystem.h>
#include <zencore/fmtutils.h>
#include <zencore/logging.h>
#include <zencore/string.h>
#include <zencore/timer.h>
namespace zen {
CopyCommand::CopyCommand()
{
m_Options.add_options()("h,help", "Print help");
m_Options.add_options()("no-clone", "Do not perform block clone", cxxopts::value(m_NoClone)->default_value("false"));
m_Options.add_options()("must-clone",
"Always perform block clone (fails if clone is not possible)",
cxxopts::value(m_MustClone)->default_value("false"));
m_Options.add_option("", "s", "source", "Copy source", cxxopts::value(m_CopySource), "<file/directory>");
m_Options.add_option("", "t", "target", "Copy target", cxxopts::value(m_CopyTarget), "<file/directory>");
m_Options.parse_positional({"source", "target"});
}
CopyCommand::~CopyCommand() = default;
void
CopyCommand::Run(const ZenCliOptions& GlobalOptions, int argc, char** argv)
{
ZEN_UNUSED(GlobalOptions);
if (!ParseOptions(argc, argv))
{
return;
}
// Validate arguments
if (m_CopySource.empty())
throw OptionParseException("'--source' is required", m_Options.help());
if (m_CopyTarget.empty())
throw OptionParseException("'--target' is required", m_Options.help());
std::filesystem::path FromPath = m_CopySource;
std::filesystem::path ToPath = m_CopyTarget;
std::error_code Ec;
std::filesystem::path FromCanonical = std::filesystem::canonical(FromPath, Ec);
if (!Ec)
{
std::filesystem::path ToCanonical = std::filesystem::canonical(ToPath, Ec);
if (!Ec)
{
if (FromCanonical == ToCanonical)
{
throw std::runtime_error("Target and source must be distinct files or directories");
}
}
}
const bool IsFileCopy = IsFile(m_CopySource);
const bool IsDirCopy = IsDir(m_CopySource);
if (!IsFileCopy && !IsDirCopy)
{
throw std::runtime_error("Invalid source specification (neither directory nor file)");
}
if (IsFileCopy && IsDirCopy)
{
throw std::runtime_error("Invalid source specification (both directory AND file!?)");
}
if (IsDirCopy)
{
if (IsFile(ToPath))
{
throw std::runtime_error("Attempted copy of directory into file");
}
if (!IsDir(ToPath))
{
CreateDirectories(ToPath);
}
std::filesystem::path ToCanonical = std::filesystem::canonical(ToPath, Ec);
if (!Ec)
{
if (ToCanonical.generic_string().starts_with(FromCanonical.generic_string()) ||
FromCanonical.generic_string().starts_with(ToCanonical.generic_string()))
{
throw std::runtime_error("Invalid parent/child relationship for source/target directories");
}
}
// Multi file copy
ZEN_CONSOLE("copying {} -> {}", FromPath, ToPath);
zen::Stopwatch Timer;
struct CopyVisitor : public FileSystemTraversal::TreeVisitor
{
CopyVisitor(std::filesystem::path InBasePath, zen::CopyFileOptions InCopyOptions)
: BasePath(InBasePath)
, CopyOptions(InCopyOptions)
{
}
virtual void VisitFile(const std::filesystem::path& Parent,
const path_view& File,
uint64_t FileSize,
uint32_t,
uint64_t) override
{
ZEN_UNUSED(FileSize);
std::error_code Ec;
const std::filesystem::path Relative = std::filesystem::relative(Parent, BasePath, Ec);
if (Ec)
{
FailedFileCount++;
}
else
{
const std::filesystem::path FromPath = Parent / File;
const std::filesystem::path ToPath = TargetPath / Relative / File;
try
{
zen::CreateDirectories(TargetPath / Relative);
if (zen::CopyFile(FromPath, ToPath, CopyOptions))
{
++FileCount;
ByteCount += FileSize;
}
else
{
throw std::logic_error("CopyFile failed in an unexpected way");
}
}
catch (const std::exception& Ex)
{
++FailedFileCount;
ZEN_CONSOLE_ERROR("Failed to copy '{}' to '{}': '{}'", FromPath, ToPath, Ex.what());
}
}
}
virtual bool VisitDirectory(const std::filesystem::path&, const path_view&, uint32_t) override { return true; }
std::filesystem::path BasePath;
std::filesystem::path TargetPath;
zen::CopyFileOptions CopyOptions;
int FileCount = 0;
uint64_t ByteCount = 0;
int FailedFileCount = 0;
};
zen::CopyFileOptions CopyOptions;
CopyOptions.EnableClone = !m_NoClone;
CopyOptions.MustClone = m_MustClone;
CopyVisitor Visitor{FromPath, CopyOptions};
Visitor.TargetPath = ToPath;
FileSystemTraversal Traversal;
Traversal.TraverseFileSystem(FromPath, Visitor);
ZEN_CONSOLE("Copy of {} files ({}) completed in {} ({})",
Visitor.FileCount,
NiceBytes(Visitor.ByteCount),
zen::NiceTimeSpanMs(Timer.GetElapsedTimeMs()),
zen::NiceRate(Visitor.ByteCount, (uint32_t)Timer.GetElapsedTimeMs()));
if (Visitor.FailedFileCount)
{
throw std::runtime_error(fmt::format("{} file copy operations FAILED", Visitor.FailedFileCount));
}
}
else
{
// Single file copy
zen::Stopwatch Timer;
zen::CopyFileOptions CopyOptions;
CopyOptions.EnableClone = !m_NoClone;
zen::CreateDirectories(ToPath.parent_path());
if (zen::CopyFile(FromPath, ToPath, CopyOptions))
{
ZEN_CONSOLE("Copy completed in {}", zen::NiceTimeSpanMs(Timer.GetElapsedTimeMs()));
}
else
{
throw std::runtime_error(fmt::format("Failed to copy '{}' to '{}'", FromPath, ToPath));
}
}
}
} // namespace zen
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