devshell/serve

#!/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 `boot` and `serve-updates` in a single command
## usage: fx serve [-v] [-d device] [--direct]
##   -v enable more verbose output (must be first argument)
##   -d target a specifc device
##   --no-direct configure target to use an SSH tunnel as transport (deprecated)

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"/lib/vars.sh
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

boot_args=()
serve_args=()
device=""

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

while (($#)); do
  case "$1" in
    -d|--device)
      serve_args+=("$1")
      shift
      if [[ "$1" != *"-"* ]]; then
        echo "Device argument must be a name, eg. 'acid-grab-stuck-line'"
        exit 1
      fi
      serve_args+=("$1")
      boot_args+=("-a")
      device="$(get-device-addr --device $1 -z)"
      if [[ ! -n "${device}" ]]; then
        echo "'$1' does not resolve"
        exit 1
      fi
      sep="%"
      prefix="${device%%$sep*}"
      device="${device:0:${#prefix}}"
      boot_args+=("${device}")
      ;;
    -v|--verbose)
      serve_args+=("$1")
      ;;
    --no-direct|--direct)
      serve_args+=("$1")
      ;;
    *)
      boot_args+=("$1")
      ;;
  esac
  shift
done

fx-command-exec boot "${boot_args[@]}" &
boot_pid=$!
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 "${boot_pid}" "${serve_pid}"; do
    if ! kill -0 $pid 2> /dev/null; then
      exit
    fi
  done
done

# See EXIT trap above for cleanup that occurs