#!/bin/bash
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

### start `pave` and `serve-updates` in a single command
## usage: fx serve [-v] [-l host[:port]]
##   -l host:port for "pm serve" to listen on
##   -v enable more verbose output (must be first argument)

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/vars.sh || exit $?
fx-config-read

kill_child_processes() {
  child_pids=$(jobs -p)
  if [[ -n "${child_pids}" ]]; then
    # Note: child_pids must be expanded to args here.
    kill ${child_pids} 2> /dev/null
    wait 2> /dev/null
  fi
}
trap kill_child_processes EXIT

serve_args=()

fx-standard-switches "$@"
set -- "${FX_ARGV[@]}"

while (($#)); do
  case "$1" in
    -v|-vv|--verbose)
      serve_args+=("$1")
      ;;
    -l)
      serve_args+=("$1" "$2")
      shift
      ;;
    *)
      echo 2>&1 "Unknown argument: \"${1}\" ignored"
      ;;
  esac
  shift
done

fx-command-exec pave &
pave_pid=$!
fx-command-exec serve-updates "${serve_args[@]}" &
serve_pid=$!

while true; do
  sleep 1

  # If any child exits, then exit the whole process, causing other children to
  # be cleaned up by the exit trap.
  for pid in "${pave_pid}" "${serve_pid}"; do
    if ! kill -0 $pid 2> /dev/null; then
      exit
    fi
  done
done

# See EXIT trap above for cleanup that occurs