add more detailed logs

src/cache.rs

@@ -57,9 +57,11 @@ impl File {
             .metadata()
             .map(|meta| meta.modified().unwrap_or(SystemTime::UNIX_EPOCH))
             .unwrap_or(SystemTime::UNIX_EPOCH);
+        let age = modified.elapsed().unwrap_or(Duration::from_secs(u64::max_value()));
+        debug!("Age of cache file: {} s", age.as_secs());
 
-        if modified.elapsed().unwrap_or(Duration::from_secs(u64::max_value())) > self.ttl {
-            debug!("Cache file is too older (> days), won't be used");
+        if age > self.ttl {
+            debug!("Cache file is too old (> {} seconds), won't be used", self.ttl.as_secs());
             return false;
         }