autotest.sh

#! /bin/bash

# adapted from http://stackoverflow.com/questions/4060212/in-linux-how-do-i-run-a-shell-script-when-a-file-or-directory-changes/20381373#20381373
DIRECTORY_TO_OBSERVE="src"
BUILD_SCRIPT=./gradlew

function block_for_change {
  inotifywait -r \
    -e modify,move,create,delete \
    --exclude ".*/build/.*" \
    $DIRECTORY_TO_OBSERVE
}

function build {
  bash $BUILD_SCRIPT
}

build
while block_for_change; do
  build
done