Check compatibility

[tobihagemann]

Minimum version of FUSE for macOS should be checked, see cryptomator/cryptomator#657.

[overheadhunter]

According to this issue the best way to get the "FUSE for macOS " version is by invoking const char *osxfuse_version(void) after loading libosxfuse.dylib.

Using JNR this could look like this:

public class FuseForMacVersionChecker {

	private static final String DYLIB_NAME = "osxfuse";

	public Optional<String> getVersion() {
		try {
			FuseDarwin lib = LibraryLoader.create(FuseDarwin.class).load(DYLIB_NAME);
			return Optional.of(lib.osxfuse_version());
		} catch (UnsatisfiedLinkError e) {
			return Optional.empty();
		}
	}

	// see /usr/local/include/osxfuse/fuse/fuse_darwin.h
	public interface FuseDarwin {
		String osxfuse_version();
	}
}

However, the library is already loaded via jnr-fuse, so maybe they can provide such a method...?

[infeo]

Another possibility is to parse the file /Library/Filesystms/osxfuse.fs/Contents/version.plist. In this file the version of the installed osxfuse bundle is listed.
The good thing about this way is that we don't need to load the library ourself.
The bad thing is that we need read access to this file.