esal.in

#! /bin/bash

# set some var
: ${ES_DATA_PATH:="/usr/lib/esal"}
ES_MODULES_PATH="${ES_DATA_PATH}/modules"
ES_CORE_PATH="${ES_DATA_PATH}/lib"
ES_DEFAULT_ACTIONS="${ES_CORE_PATH}/default.esal"
ES_BINARY="esal"
ES_ENVCONF="/etc/env.conf"
ES_ESALRC="/etc/esalrc"
ES_VERSION="${ES_BINARY} ${ES_VERSION:="1.1"}"

# unset some bash internal
unset CDPATH GLOBIGNORE

# give us ability for trap execution
trap 'echo "exiting" >&2; exit 250' 15

# every module founded in ES_MODULE_PATH has main functions like
# do_list, do_set, do_help, do_usage, do_enable, do_disable.
# it is possible to have some sort of arbitrary functions in modules (this is bash)
# needed for module operation
es_do_list(){
	do_list "${@:3}"
}
es_do_set(){
	do_set "$@"
}
es_do_read(){
	do_read "${@:3}"
}
es_do_fetch(){
	do_fetch"${@:3}"
}
es_do_enable(){
	do_enable "$@"
}
es_do_disable(){
	do_disable "$@"
}
es_do_help(){
	do_help
}
es_do_usage(){
	do_usage
}
es_do_show(){
	do_show
}
es_do_version(){
	do_version
}
es_do_configure(){
	inherit config
	create_envconf "${ES_ENVCONF}"
}

# Load core functions
source "${ES_CORE_PATH}/core.bash" || exit 255
source "${ES_ESALRC}" || die -m "No esalrc config file"

# Load necessary functions for the main script
inherit colors default output

es_load_module(){
	local modname=${1}

	if ! (grep -qF "$modname" <<< "${ES_MODULES_AVAILABLE[@]}"); then
		die -m "No such module \"$modname\""
	fi

	[[ -f "$ES_MODULES_PATH/${modname}.esal" ]] && \
		source $ES_MODULES_PATH/$modname.esal || \
		die -m "Module \"$modname\" dont exist in system"
}

# MAIN process start here
for i in ${@##--}; do
	[[ "$i" =~ ^[a-z0-9] ]] && modname+=("$i") && \
      action=("${modname[@]:1}")
done

# don't allow blacklisted modules from /etc/esalrc
if ! [[ -z $MODULE_BLACKLIST ]]; then
	while read -r mod; do
		ES_MODULES_AVAILABLE+=( $(basename "${mod/%.*}") )
	done < <(ls -1 ${ES_MODULES_PATH}/*.esal | grep -Ev ${MODULE_BLACKLIST})
else
	while read -r mod; do
		ES_MODULES_AVAILABLE+=( $(basename "${mod/%.*}") )
	done < <(ls -1 $(ls -1 $ES_MODULES_PATH/*.esal))
fi

if [[ $# -gt 0 ]]; then
	 case ${modname} in
	   help | usage | version | configure )
	  	 [[ $# -eq 1 ]] && es_do_${modname} && exit 1 \
	  	 || die -m "Too many parameters" ;;
	   * ) es_load_module "$modname" ;;
	 esac

	 # every module consist of module parameters which can accept
	 # standard parameters like (help,usage,version) are not needed as they
	 # are standard
	for i in "${MODULE_PARAMETERS}"; do
		[[ $i == $action ]] && action="$i"
	done

	# modules calling
	if ! [[ -n $action  ]]; then
		es_do_${DEFAULT_ACTION}
	else
		if is_function es_do_${action}; then
			es_do_${action} "$@"
		else
			die -m "No such action \"$action\""
		fi
	fi

else
	# ececute this if there us no argugument at all
	es_do_help
fi