fs/system rack: get entries filtered?

q8fuel · July 19, 2024, 12:27pm

hi,

is there a way using the native rack filesystem library to getEntries filtering by a list of extensions? such as get all files/dirs of a path including only *mp3/*wav?

thanks

baconpaul · July 21, 2024, 12:49am

Rack system just uses ghc filesystem which is std filesystem

github.com

VCVRack/Rack/blob/58f2482df860fe878581423aedc8cadb1d94eb50/src/system.cpp#L71


      
          
          
          std::string join(const std::string& path1, const std::string& path2) {
          	return (fs::u8path(path1) / fs::u8path(path2)).generic_u8string();
          }
          
          
          static void appendEntries(std::vector<std::string>& entries, const fs::path& dir, int depth) {
          	try {
          		for (const auto& entry : fs::directory_iterator(dir)) {
          			entries.push_back(entry.path().generic_u8string());
          			// Recurse if depth > 0 (limited recursion) or depth < 0 (infinite recursion).
          			if (depth != 0) {
          				if (entry.is_directory()) {
          					appendEntries(entries, entry.path(), depth - 1);
          				}
          			}
          		}
          	}
          	catch (fs::filesystem_error& e) {}
          }

As long as you are careful with your string to path conversion as that example is (it uses fs::u8path) you can just use std filesystem functions even with 11

q8fuel · July 22, 2024, 10:10am

many thanks mr @baconpaul , this seems to works perfectly:

mScannedPathFiles.clear();
for (const auto &entry : fs::recursive_directory_iterator(fs::u8path(mPathCurrentDir))) {
	if (entry.is_regular_file() && entry.path().extension() == ".wav") {
		mScannedPathFiles.push_back(entry.path().generic_u8string());
	}
}

thanks