entrypoint

#! /bin/bash


CONSUL_ENV_CMD=$(cat <<EOF
bundle exec cmdb shim --env \
  --user www-data \
  --consul-url=http://consul:8500 \
  --consul-prefix ${RS_DEPLOYMENT_UNIT}/library \
  --consul-prefix ${RS_DEPLOYMENT_UNIT}/common
EOF
)

if getent hosts consul
then
  CMD_PREFIX="$CONSUL_ENV_CMD -- "
else
  CMD_PREFIX=""
fi

print-inputs() {
  declare desc="Print the ENV"
  env | sort
  echo
}

yaml-esque-get() {
  declare desc="Get key value from colon-separated structure"
  declare key="$1"
  local inputkey
  local cmd
  while read line || [[ -n "$line" ]]; do
    [[ "$line" =~ ^#.* ]] && continue
    inputkey=${line%%:*}
    cmd=${line#*:}
    [[ "$inputkey" == "$key" ]] && echo "$cmd"
  done <<< "$(cat)"
}

procfile-parse() {
  declare desc="Get command string for a process type from .cmd"
  declare type="$1"
  cat ".cmd" | yaml-esque-get "$type"
}

get-command() {
  declare desc="Get the command mapping for a command word"
  declare type="$1"

  if [ -z "$1" ]
  then word="$(procfile-parse "web")"
  else word="$(procfile-parse "$1")"
  fi

  if [ -z "$word" ]
  then cmd="$1"
  else cmd="$word"
  fi

  echo "$cmd"
}

run-commands() {
  declare desc="Run command words"
  declare type="$1"

  echo "command.sh: Printing inputs"
  print-inputs

  # eval all the words, but exec the last one
  until [ -z "$1" ]
  do
    cmd="$CMD_PREFIX$(eval echo $(get-command "$1"))"
    echo "command.sh: Command word is '"$1"', running '$cmd'"

    if [ "$#" -gt "1" ]
    then eval "$(eval echo "$cmd")" || echo "Process exited with status $?" && exit 1
    else exec $cmd
    fi

    shift
  done
}

main() {
  declare desc="Kick off the entrypoint script"
  declare type="$@"

  if [ $# -eq 0 ]; then
    echo "command.sh: No command words specified. Exiting"
  else
    run-commands "$@"
  fi
}

main "$@"