watch_and_serve_local_dev

#! /bin/bash -e

set -o pipefail

source ./bin/check_deps

log_file_dir=build-local_dev
mkdir -p "$log_file_dir"
log_file="$log_file_dir/log-$(date +%Y-%m-%dT%H:%M:%S%Z)"

to_make=(
  source/includes/app-components-reference/_index.html.md
  source/includes/api-reference/_index.html.md
)

run_middleman() {
  if ! bundle exec middleman serve --watcher-force-polling; then
    echo "failed to run middleman" >&2
    exit 1
  fi
}

acquire_lock() {
  file_lock="$log_file_dir/LOCK"
  if [[ -f "$file_lock" ]]; then
    {
      echo "This script may already be running somewhere in process $(cat "$file_lock"),"
      echo "or has left behind a lockfile at $file_lock"
      echo "If you're sure it's not running, you can manually remove it."
      echo "Otherwise, you should kill the script that is running elsewhere like so:"
      echo '`kill -- -'"$(cat "$file_lock")"'`'
    } >&2

    exit 1
  fi

  trap "rm -f '$file_lock'" EXIT
  echo "$$" >"$file_lock"
}

echo "logging to $log_file"

make --jobs 8 "${to_make[@]}"

echo
echo "***"
echo
echo "  Watching \$OPENAPI_DIR for changes."
echo "  Editing OAS (e.g., asana_oas.yaml) will automatically regenerate the docs site."
echo "  Refresh the localhost browser window to see the new changes."
echo
echo "***"
echo

parent="$$"

asdf exec bundle config set --local path 'vendor/bundle'
asdf exec bundle install

acquire_lock

# This instructs bash to honor the SIGCHLD signal. We use that below to kill the
# background watch and make job.
set -o monitor notify
./bin/watch_and_make "${to_make[@]}" &
child="$!"

trap on_child_died SIGCHLD

# This can be called for either run_middleman or watch_and_make.
on_child_died() {
  echo "killing background jobs (pgid): -$child"
  # The "-" prefix indicates to kill that we're killing progress groups and not
  # just individual processes. This needs to be done to kill everything in the
  # watch_and_make script.
  kill -- "-$child" "-$parent"
}

run_middleman