commento/scripts/autoserve

#!/usr/bin/env bash

binary_name=commento

trap ctrl_c INT
ctrl_c() {
  kill -SIGTERM $(jobs -p)
  wait $(jobs -p)
  exit
}

if [[ "$1" == "" ]]; then
  version=devel
else
  version=$1
fi

binary_pid=
if make $version -j$(($(nproc) + 1)); then
  source devel.env
  cd build/$version
  ./$binary_name &
  binary_pid=$!
  cd ../../
fi

find_cmd() {
  find . ! \( -path "*.git" -o -path "*.git/*" -o -path "*/build" -o -path "*/build/*" \) -type $1
}

while true; do
  inotifywait -q --format '' -e close_write $(find_cmd f) &
  write_pid=$!

  inotifywait -q --format '' -e create $(find_cmd d) &
  create_pid=$!

  wait -n

  if ps -p $write_pid >/dev/null && ps -p $create_pid >/dev/null; then
    # The wait finished because the build was successful, but our binary exited
    # prematurely. We need to back to waiting.
    kill -SIGTERM $write_pid $create_pid 2>/dev/null
    wait $write_pid $create_pid
    printf "\033[1;31m ** $binary_name failed to execute properly\n\033[0m"
    continue
  fi

  kill -SIGTERM $write_pid $create_pid 2>/dev/null
  wait $write_pid $create_pid

  # TODO: Is sending SIGKILL the best idea? Maybe our backend has some tasks
  # to complete before terminating gracefully?
  if [[ ! -z "$binary_pid" ]]; then
    kill -SIGINT $binary_pid
    wait $binary_pid
  fi

  if make $version -j$(($(nproc) + 1)); then
    source devel.env
    cd build/$version
    ./$binary_name &
    binary_pid=$!
    cd ../../
  else
    binary_pid=
  fi
done