lib.cdevent

#!/bin/bash

export CDEVENT_CMDS=""
export CDEVENT_CMDS_PRE=""

function cdevent_push_pre() {
  local l_cmd="$1"; shift

  if [ ! -z "${CDEVENT_CMDS_PRE}" ]; then
      CDEVENT_CMDS_PRE="${CDEVENT_CMDS_PRE};"
  fi
  CDEVENT_CMDS_PRE="${CDEVENT_CMDS_PRE}${l_cmd}"
}

function cdevent_push() {
  local l_cmd="$1"; shift

  if [ ! -z "${CDEVENT_CMDS}" ]; then
      CDEVENT_CMDS="${CDEVENT_CMDS};"
  fi
  CDEVENT_CMDS="${CDEVENT_CMDS}${l_cmd}"
}

function __cdevent_run_pre() {
  local l_args="$*"
  local l_list="${CDEVENT_CMDS_PRE}"
  local l_ret=0
  if [ ! -z "${l_list}" ]; then
      l_list="${l_list};"
  fi
  while read -r -d ";" cmd; do
    eval "${cmd} \"${l_args}\"" || {
      l_ret=1
    }
  done < <(echo "${l_list}")
  return ${l_ret}
}

function __cdevent_run() {
  local l_args="$*"
  local l_list="${CDEVENT_CMDS}"
  local l_ret=0
  if [ ! -z "${l_list}" ]; then
      l_list="${l_list};"
  fi
  # transform cmds string into array to avoid redirecting
  # when running individual commands  (see tty -s in lib.envloader)
  declare -a l_cmds=() || return
  while read -r -d ";" cmd; do
    l_cmds+=( $cmd )
  done < <(echo "${l_list}")
  # loop cmds without redirecting (see tty -s in lib.envloader)
  for cmd in "${l_cmds[@]}"; do
    eval "${cmd} \"${l_args}\"" || {
      l_ret=1
      break
    }
  done
  return ${l_ret}
}

decorate_builtin cd __cdevent_run_pre __cdevent_run