Major Subsystem Rewrite (Reconciler Mk5) (#217)

server/src/imfs/noop_fetcher.rs

@@ -0,0 +1,49 @@
+//! Implements the IMFS fetcher interface for a fake filesystem using Rust's
+//! std::fs interface.
+
+use std::{
+    io,
+    path::{Path, PathBuf},
+};
+
+use crossbeam_channel::Receiver;
+
+use super::fetcher::{ImfsFetcher, FileType, ImfsEvent};
+
+pub struct NoopFetcher;
+
+impl ImfsFetcher for NoopFetcher {
+    fn file_type(&mut self, _path: &Path) -> io::Result<FileType> {
+        Err(io::Error::new(io::ErrorKind::NotFound, "NoopFetcher always returns NotFound"))
+    }
+
+    fn read_children(&mut self, _path: &Path) -> io::Result<Vec<PathBuf>> {
+        Err(io::Error::new(io::ErrorKind::NotFound, "NoopFetcher always returns NotFound"))
+    }
+
+    fn read_contents(&mut self, _path: &Path) -> io::Result<Vec<u8>> {
+        Err(io::Error::new(io::ErrorKind::NotFound, "NoopFetcher always returns NotFound"))
+    }
+
+    fn create_directory(&mut self, _path: &Path) -> io::Result<()> {
+        Ok(())
+    }
+
+    fn write_file(&mut self, _path: &Path, _contents: &[u8]) -> io::Result<()> {
+        Ok(())
+    }
+
+    fn remove(&mut self, _path: &Path) -> io::Result<()> {
+        Ok(())
+    }
+
+    fn watch(&mut self, _path: &Path) {
+    }
+
+    fn unwatch(&mut self, _path: &Path) {
+    }
+
+    fn receiver(&self) -> Receiver<ImfsEvent> {
+        crossbeam_channel::never()
+    }
+}