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/**
*
* @file FilesystemRuntimeRule.cpp
* @author Gaspard Kirira
*
* Copyright 2025, Gaspard Kirira. All rights reserved.
* https://github.com/vixcpp/vix
* Use of this source code is governed by a MIT license
* that can be found in the License file.
*
* Vix.cpp
*
*/
#include <vix/cli/errors/runtime/IRuntimeErrorRule.hpp>
#include <vix/cli/errors/runtime/RuntimeRuleUtils.hpp>
#include <filesystem>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <vix/cli/Style.hpp>
using namespace vix::cli::style;
namespace vix::cli::errors::runtime
{
namespace
{
enum class FilesystemKind
{
FileNotFound,
NotADirectory,
IsADirectory,
FileAlreadyExists,
TooManySymlinks,
InvalidPath,
GenericFilesystemError,
};
FilesystemKind classify_issue(const std::string &log)
{
if (icontains(log, "No such file or directory"))
return FilesystemKind::FileNotFound;
if (icontains(log, "not a directory"))
return FilesystemKind::NotADirectory;
if (icontains(log, "is a directory"))
return FilesystemKind::IsADirectory;
if (icontains(log, "file exists"))
return FilesystemKind::FileAlreadyExists;
if (icontains(log, "too many symbolic links"))
return FilesystemKind::TooManySymlinks;
if (icontains(log, "invalid path"))
return FilesystemKind::InvalidPath;
return FilesystemKind::GenericFilesystemError;
}
std::string choose_message(const std::string &log)
{
switch (classify_issue(log))
{
case FilesystemKind::FileNotFound:
return "file not found";
case FilesystemKind::NotADirectory:
return "path is not a directory";
case FilesystemKind::FileAlreadyExists:
return "path already exists";
case FilesystemKind::IsADirectory:
case FilesystemKind::TooManySymlinks:
case FilesystemKind::InvalidPath:
case FilesystemKind::GenericFilesystemError:
default:
return "filesystem error";
}
}
std::string choose_hint(const std::string &log)
{
(void)log;
return "check the path, working directory, permissions, and parent directories";
}
std::vector<std::string> source_patterns_for_filesystem()
{
return {
"std::filesystem",
"create_directories",
"create_directory",
"current_path(",
"exists(",
"remove(",
"rename(",
"copy(",
"ifstream",
"ofstream",
};
}
bool looks_like_filesystem_log(const std::string &log)
{
// Skip cases handled by more specific rules
if (icontains(log, "Permission denied") ||
icontains(log, "EACCES") ||
icontains(log, "EPERM"))
{
return false;
}
return icontains(log, "std::filesystem::filesystem_error") ||
icontains(log, "filesystem error") ||
icontains(log, "No such file or directory") ||
icontains(log, "not a directory") ||
icontains(log, "is a directory") ||
icontains(log, "file exists") ||
icontains(log, "too many symbolic links") ||
icontains(log, "invalid path");
}
} // namespace
class FilesystemRuntimeRule final : public IRuntimeErrorRule
{
public:
bool match(
const std::string &log,
const std::filesystem::path &sourceFile) const override
{
(void)sourceFile;
return looks_like_filesystem_log(log);
}
bool handle(
const std::string &log,
const std::filesystem::path &sourceFile) const override
{
const std::string message = choose_message(log);
RuntimeLocation location = find_best_runtime_location(log, sourceFile);
if (!location.valid())
{
location = find_best_runtime_location_or_source_hint(
log,
sourceFile,
source_patterns_for_filesystem());
}
std::cerr << RED
<< "runtime error: "
<< message
<< RESET << "\n";
if (location.valid())
{
const auto err = make_runtime_location(
location.file,
location.line,
location.column,
message);
print_runtime_codeframe(err);
}
print_runtime_hints_and_at(
{
choose_hint(log),
"the runtime log below contains the exact path reported by the OS",
},
make_at_text(location, sourceFile));
print_runtime_log_excerpt(log, 20);
return true;
}
};
std::unique_ptr<IRuntimeErrorRule> makeFilesystemRuntimeRule()
{
return std::make_unique<FilesystemRuntimeRule>();
}
} // namespace vix::cli::errors::runtime