Filewatch

Branch	Status
Master

Single header folder/file watcher in C++11 for windows and linux, with optional regex filtering

Install:

Drop FileWatch.hpp in to your include path, and you should be good to go.

Compiler Support:

Works on:

• Clang 4 and higher
• GCC 4.8 and higher
• Visual Studio 2015 and higher should be supported, however only 2019 is on the ci and tested

Examples:

• Simple
• Change Type
• Regex
• Using std::filesystem
• Works with relative paths
• Single file watch

On linux or none unicode windows change std::wstring for std::string or std::filesystem (boost should work as well).

Simple:

filewatch::FileWatch<std::wstring> watch(
	L"C:/Users/User/Desktop/Watch/Test"s, 
	[](const std::wstring& path, const filewatch::Event change_type) {
		std::wcout << path << L"\n";
	}
);

Change Type:

filewatch::FileWatch<std::wstring> watch(
	L"C:/Users/User/Desktop/Watch/Test"s, 
	[](const std::wstring& path, const filewatch::Event change_type) {
		std::wcout << path << L" : ";
		switch (change_type)
		{
		case filewatch::Event::added:
			std::cout << "The file was added to the directory." << '\n';
			break;
		case filewatch::Event::removed:
			std::cout << "The file was removed from the directory." << '\n';
			break;
		case filewatch::Event::modified:
			std::cout << "The file was modified. This can be a change in the time stamp or attributes." << '\n';
			break;
		case filewatch::Event::renamed_old:
			std::cout << "The file was renamed and this is the old name." << '\n';
			break;
		case filewatch::ChangeType::renamed_new:
			std::cout << "The file was renamed and this is the new name." << '\n';
			break;
		};
	}
);

Regex:

Using the standard regex libary you can filter the file paths that will trigger. When using wstring you will have to use std::wregex

filewatch::FileWatch<std::wstring> watch(
	L"C:/Users/User/Desktop/Watch/Test"s,
	std::wregex(L"test.*"),
	[](const std::wstring& path, const filewatch::Event change_type) {
		std::wcout << path << L"\n";
	}
);

Using std::filesystem:

filewatch::FileWatch<std::filesystem::path> watch(
	L"C:/Users/User/Desktop/Watch/Test"s, 
	[](const std::filesystem::path& path, const filewatch::Event change_type) {
		std::wcout << std::filesystem::absolute(path) << L"\n";		
	}
);

Works with relative paths:

filewatch::FileWatch<std::filesystem::path> watch(
	L"./"s, 
	[](const std::filesystem::path& path, const filewatch::Event change_type) {
		std::wcout << std::filesystem::absolute(path) << L"\n";		
	}
);

Single file watch:

filewatch::FileWatch<std::wstring> watch(
	L"./test.txt"s, 
	[](const std::wstring& path, const filewatch::Event change_type) {
		std::wcout << path << L"\n";		
	}
);