pull: explain progress

src/pull.rs

@@ -28,6 +28,7 @@ fn clone_repo(
 
     let mut callbacks = git2::RemoteCallbacks::new();
     if let Some(ref progress_cb) = progress {
+        // Download progress
         callbacks.transfer_progress(move |stats| {
             (progress_cb)(
                 "",
@@ -37,6 +38,9 @@ fn clone_repo(
             );
             true
         });
+
+        // Remote progress: messages 'Remote: compressing objects 10% (34/340)'
+        // Parse progress informations to display them in callbacks
         callbacks.sideband_progress(move |data| {
             let msg = String::from_utf8_lossy(data);
             let re = Regex::new(r"(.*):[ ]*([0-9]*)% \(([0-9]*)/([0-9]*)\)").unwrap();