Access local file system from .Net

[rossknudsen]

I'm working on a VS Code extension and writing the base implementation in .Net and calling from the extension in Typescript. I'm having trouble accessing local files from the .Net code using System.IO.* API. E.g. calling File.Exists() on a local Windows file path returns false for a valid path. I'm guessing that I don't have permission to access the file from the running process or the path needs to be modified. Any ideas?

[rossknudsen]

Some experimentation:

using System.IO;
Directory.GetCurrentDirectory(); // => "/"
Directory.Exists(Directory.GetCurrentDirectory()); // => true
Directory.GetFiles("/").Length; // => 0
string.Join(",", Directory.GetDirectories("/")); // => "/tmp,/home,/dev,/proc"
string.Join(",", Directory.GetDirectories("/home")); // => "/home/web_user"

[rossknudsen]

Looks like the environment is sandboxed and you need to pass in a mapping for the WASM when initializing. I'd say you'd want to extend BootData with an option to pass through the options, but I couldn't see where the changes would be made (somewhere in dotnet.js I think).

[elringus]

Don't think nodejs's FS will work, even if you're not targeting web extensions because of the security restrictions. You'd have to use VS Code's abstraction layer APIs to access the files.