Factor out file hashing.

1 files changed, 8 insertions, 5 deletions

diff --git a/src/main.rs b/src/main.rs
index b2b65cd..b5c0d93 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -20,6 +20,13 @@ struct TagBase {
     conn: Connection,
 }
 
+fn hash_file(path: &Path) -> Result<String> {
+    let mut file = std::fs::File::open(path)?;
+    let mut hasher = Blake2b::new();
+    let _ = io::copy(&mut file, &mut hasher)?;
+    Ok(base64::encode(&hasher.result()))
+}
+
 impl TagBase {
     /// Instantiate a new `TagBase` whose backing database is at `path`.
     pub fn new(path: &str) -> Result<Self> {
@@ -72,11 +79,7 @@ impl TagBase {
             bail!("`path` does not name a file.");
         }
 
-        let mut file = std::fs::File::open(path)?;
-        let mut hasher = Blake2b::new();
-        let _ = io::copy(&mut file, &mut hasher)?;
-        let hash = base64::encode(&hasher.result());
-
+        let hash = hash_file(path)?;
         let file_name = path
             .file_name()
             .and_then(|os| os.to_str())