back to all but corruption tests green

src/index/io.rs

@@ -1,3 +1,4 @@
+use log::error;
 use std::collections::HashMap;
 use vfs::VfsPath;
 
@@ -93,9 +94,12 @@ impl Index {
     }
 
     fn load_from_file(index_file_path: &VfsPath) -> Result<Self> {
-        let index_text = index_file_path
+        let mut file = index_file_path.open_file()?;
-            .read_to_string()
+        let mut encoded = vec![];
-            .context(format!("reading index file contents from {}", index_file_path.as_str()))?;
+        file.read_to_end(&mut encoded)?;
+
+        let decoded = error_correcting_encoder::decode(&encoded)?;
+        let index_text = String::from_utf8(decoded)?;
 
         let index: Index =
             serde_json::from_str(&index_text).context(format!("cannot read index from: {}", index_file_path.as_str()))?;

src/io/error_correcting_encoder.rs

@@ -1,6 +1,7 @@
 use std::io::Read;
 
-use anyhow::Result;
+use anyhow::*;
+use reed_solomon::Decoder;
 use reed_solomon::Encoder;
 
 const ECC_LENGTH: usize = 8;
@@ -11,8 +12,13 @@ pub fn encode(bytes: &[u8]) -> Result<Vec<u8>> {
     Ok(encoded.bytes().collect::<Result<Vec<u8>, _>>()?)
 }
 
-pub fn decode(bytes: &[u8]) -> Result<&[u8]> {
+pub fn decode(bytes: &[u8]) -> Result<Vec<u8>> {
-    Ok(bytes)
+    let decoder = Decoder::new(ECC_LENGTH);
+    let maybe_corrected = decoder.correct(bytes, None);
+    match maybe_corrected {
+        Ok(corrected) => Ok(corrected.data().to_vec()),
+        Err(_) => Err(anyhow!("")),
+    }
 }
 
 mod must {