fix draw progressbar

.github/scripts/flutter-integration-tests.sh

@@ -1,3 +1,27 @@
+#!/bin/bash
+# in our experience it takes about four mins on CI to startup the app
+PROGRESS_BAR_WIDTH=50  # progress bar length in characters
+
+draw_progress_bar() {
+  # Arguments: current value, max value, unit of measurement (optional)
+  local __value=$1
+  local __max=$2
+  local __unit=${3:-""}  # if unit is not supplied, do not display it
+
+  # Calculate percentage
+  if (( $__max < 1 )); then __max=1; fi  # anti zero division protection
+  local __percentage=$(( 100 - ($__max*100 - $__value*100) / $__max ))
+
+  # Rescale the bar according to the progress bar width
+  local __num_bar=$(( $__percentage * $PROGRESS_BAR_WIDTH / 100 ))
+
+  # Draw progress bar
+  printf "["
+  for b in $(seq 1 $__num_bar); do printf "#"; done
+  for s in $(seq 1 $(( $PROGRESS_BAR_WIDTH - $__num_bar ))); do printf " "; done
+  printf "] $__percentage%% ($__value / $__max $__unit)\r"
+}
+
 cd app
 flutter run integration_test/main_test.dart  \
     --host-vmservice-port 9753 \
@@ -11,13 +35,9 @@ flutter run integration_test/main_test.dart  \
     &
 subscript_pid=$!
 
-# in our experience it takes about four mins on CI to startup the app
-
-BAR='#######################'   # this is full bar, e.g. 20 chars
-
-for i in {1..24}; do
-    echo -ne "\r$i/24 ${BAR:0:$i}" # print $i chars of $BAR from 0 position
-    sleep 10                 # wait 10s between "frames"
+for i in {1..240}; do
+    draw_progress_bar $i 240 'seconds'
+    sleep 1
 done
 echo "\n"