start

#!/usr/bin/env bash

# re-exec with an identifiable argv[0] ( `start:<dirname>` ) so derived projects
# are distinguishable in `ps` output.
if [ -z "$SB_START_NAMED" ]; then
  SB_START_NAMED=1 exec -a "start:$(basename "$PWD")" bash "$0" "$@"
fi

# --noloop: run server once without auto-restart loop,
# for service managers ( e.g., systemd with Restart=always ) that restart on their own.
# --force: start even if another server already answers on .localctl.sock.
LOOP=1
FORCE=0
CFG=""
for a in "$@"; do
  case "$a" in
    --noloop|-n) LOOP=0 ;;
    --force|-F) FORCE=1 ;;
    *) CFG="$a" ;;
  esac
done

# refuse to start a second server for the same project. with several terminals /
# agents on one machine this is easy to do by accident, and the loser is whoever
# gets EADDRINUSE. checked before the traps below are installed, so that bailing
# out here never touches the running server's .server.pid.
if [ "$FORCE" = 0 ] && ./tool/base/ping -q; then
  echo "a server is already running in this project:"
  ./tool/base/ping
  echo
  echo "run 'npm run log' to watch it, 'npm run stop' to stop it,"
  echo "or './start --force' to start anyway."
  exit 1
fi

trap "rm -f .server.pid; kill 0" exit # killing all process on current group on exit
trap "echo server loop stopped; exit" SIGINT SIGTERM # on ctrl-c, exit script.

echo $$ > .server.pid # for `npm stop`; killing this pid takes down the whole group.

# pino-pretty params
#  -i : ignore
#  -c : color
#  -t : format timestamp

# see infrastructure.md -> daemon
while [ 1 ]; do

  if [[ $NODE_ENV == "production" ]]; then
    # production - use prebuilt js files
    CMD=(node ./.backend/engine/index.js)
  else
    # dev - use livescript files
    CMD=(./node_modules/.bin/lsc ./backend/engine/index)
  fi
  ARGS=(--home "$PWD") # identity hint; also sets process.title in engine
  if [ -n "$CFG" ]; then ARGS+=(-c "$CFG"); fi

  "${CMD[@]}" "${ARGS[@]}" | \
     tee -a server.log | \
     ./node_modules/.bin/pino-pretty \
       -c -o "[{module}] {msg} {responseTime}" \
       -i req,res,hostname,pid,module,responseTime \
       -t "yy/mm/dd HH:MM:sso"

  if [ "$LOOP" = "0" ]; then break; fi

  echo "server down; try to auto restart after 1s."
  sleep 1;

done

wait