feat: allow to manually finish progressbar

this is originally a workaround for the `deadlock` found in issue emersonford#10

src/lib.rs

@@ -296,11 +296,17 @@ impl IndicatifSpanContext {
         }
     }
 
-    fn progress_bar_tick(&mut self) {
+    fn progress_bar_tick(&self) {
         if let Some(ref pb) = self.progress_bar {
             pb.tick()
         }
     }
+
+    fn progress_bar_finish_clear(&self) {
+        if let Some(ref pb) = self.progress_bar {
+            pb.finish_and_clear();
+        }
+    }
 }
 
 /// The layer that handles creating and managing indicatif progress bars for active spans. This

src/pb_manager.rs

@@ -149,7 +149,7 @@ impl ProgressBarManager {
         self.tick_settings = tick_settings;
     }
 
-    fn decrement_pending_pb(&mut self) {
+    fn decrement_pending_pb(&self) {
         let prev_val = self
             .pending_progress_bars
             .fetch_sub(1, std::sync::atomic::Ordering::AcqRel);
@@ -266,6 +266,12 @@ impl ProgressBarManager {
             return;
         }
 
+        // PorgressBar is already finished
+        if pb.is_finished() {
+            self.decrement_pending_pb();
+            return;
+        }
+
         // This span had an active/shown progress bar.
         pb.finish_and_clear();
         self.mp.remove(&pb);

src/span_ext.rs

@@ -76,6 +76,9 @@ pub trait IndicatifSpanExt {
     ///
     /// Has no effect if the progress bar for this span is not active.
     fn pb_tick(&self);
+
+    /// Finish the progress bar
+    fn pb_finish_clear(&self);
 }
 
 impl IndicatifSpanExt for Span {
@@ -125,4 +128,10 @@ impl IndicatifSpanExt for Span {
             indicatif_ctx.progress_bar_tick();
         });
     }
+
+    fn pb_finish_clear(&self) {
+        apply_to_indicatif_span(self, |indicatif_ctx| {
+            indicatif_ctx.progress_bar_finish_clear();
+        });
+    }
 }