improved bundle cli output with progress

pipeline/05_bundle_gen/main.go

@@ -228,13 +228,16 @@ func main() {
 					log.Fatalf("Failed to write bundle %d: %v", job.index, err)
 				}
 
+				n := bundlesCreated.Add(1)
+				estimatedTotal := (totalHosts + cfg.EntriesPerBundle - 1) / cfg.EntriesPerBundle
+				if n%500 == 0 {
+					fmt.Printf("  %d/%d bundles\n", n, estimatedTotal)
+				}
+
 				logLine := fmt.Sprintf("bundle: %04d.json %dKB", job.index, len(job.data)/1024)
-				fmt.Println(logLine)
 				if logWriter != nil {
 					logWriter.Write(logLine, false)
 				}
-
-				bundlesCreated.Add(1)
 				totalBytes.Add(int64(len(job.data)))
 			}
 		}()