Android emulator helper functions

emulator_helpers.zsh

mkdir "$HOME/avd_logs"

function wait_for() {
  name=$1
  check_command=$2
  i=0
  while ! eval "$check_command"; do
    (( i++ == 0 )) && printf %s "-- Waiting for $name ..." || printf '.'
    sleep 1
    if [ $i -gt $((5 * 60)) ] #5 minutes max spin time
    then
      (( i )) && printf '\n'
      echo "$name took too long"
      exit 1
    fi
  done
  (( i )) && printf '\n'
}

function check_adb_count() {
  expected_count=$1
  if [ $expected_count -eq $(adb devices | grep -c emulator) ]
  then
    return 0
  else
    return 1
  fi
}

function startEmulators() {
  avd=$1
  count=$2
  i=0
  while [ $i -lt $count ]
  do
    next=$((i + 1))
    nohup emulator -avd "$1" -read-only -cores 2 -gpu auto -noaudio -no-window -no-boot-anim &> "$HOME/avd_logs/emu_$next.txt" &
    wait_for "emulator $next to show up in adb" "check_adb_count $next"
    i=$next
  done
}

function stopEmulators() {
  adb devices | \
  grep emulator | \
  cut -f1 | \
  while read -r emulator
  do
    echo "Issuing kill command for $emulator"
    adb -s "$emulator" emu kill
    sleep 1
  done
}