#
# set +o errexit -o noglob is assumed.
#

exp_rtl_fileop_check() {
	local _prefix="${1}" _pname="" _rname=""; shift;
	while [ "${#}" -gt 0 ]; do
		return 0;
	shift; done;
};

ex_rtl_fileop() {
	local _op="${1}" _dst="" _install_args="" _rc=0 _src=""; shift;
	case "${_op}" in
	cd)	if [ \( -z "${1}" \) -o ! \( -L "${1}" -o -e "${1}" \) ]; then
			ex_rtl_log_msg failexit "Invalid or non-existent directory \`${1}'.";
		elif exp_rtl_fileop_check "${PREFIX}" "${1}"; then
			ex_rtl_log_msg vvvv "Changing working directory to \`${1}'.";
			cd -- "${1}"; _rc="${?}";
		fi; ;;
	cp_follow)
		if [ "${#}" -lt 2 ]; then
			ex_rtl_log_msg failexit "Missing parameters (in: cp_follow ${*}.)";
		elif exp_rtl_fileop_check "${PREFIX}" "${*}"; then
			_src="${*}"; _src="${_src% *}";
			_dst="${*}"; _dst="${_dst##* }";
			ex_rtl_log_msg vvvv "Copying \`${_src}' into \`${_dst}' w/ -pLR.";
			cp -pLR -- "${@}"; _rc="${?}";
		fi; ;;
	cp)	if [ "${#}" -lt 2 ]; then
			ex_rtl_log_msg failexit "Missing parameters (in: cp ${*}.)";
		elif exp_rtl_fileop_check "${PREFIX}" "${*}"; then
			_src="${*}"; _src="${_src% *}";
			_dst="${*}"; _dst="${_dst##* }";
			ex_rtl_log_msg vvvv "Copying \`${_src}' into \`${_dst}' w/ -pPR.";
			cp -pPR -- "${@}"; _rc="${?}";
		fi; ;;
	install)
		if [ "${#}" -lt 2 ]; then
			ex_rtl_log_msg failexit "Missing parameters (in: install ${*}.)";
		else	_dst="$(while [ ""${#}"" -gt 2 ]; do shift; done; echo "${2}")";
			_install_args="$(while [ ""${#}"" -gt 2 ]; do echo "${1}"; shift; done)";
			_src="$(while [ ""${#}"" -gt 2 ]; do shift; done; echo "${1}")";
			if exp_rtl_fileop_check "${PREFIX}" "${_dst}" "${_src}"; then
				ex_rtl_log_msg vvvv "Installing \`${_src}' into \`${_dst}' w/ ${_install_args}.";
				install "${@}"; _rc="${?}";
			fi;
		fi; ;;
	ln_symbolic)
		if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
			ex_rtl_log_msg failexit "Missing parameters (in: ln_symbolic ${*}.)";
		elif exp_rtl_fileop_check "${PREFIX}" "${2}"; then
			if ex_rtl_fileop test "${2}"; then
				ex_rtl_fileop rm "${2}";
			fi;
			if [ "${?}" -eq 0 ]; then
				ex_rtl_log_msg vvvv "Linking \`${1}' to \`${2}' w/ -fs";
				ln -fs -- "${1}" "${2}"; _rc="${?}";
			fi;
		fi; ;;
	mv)	if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
			ex_rtl_log_msg failexit "Missing parameters (in: mv ${*}.)";
		elif exp_rtl_fileop_check "${PREFIX}" "${1}" "${2}"; then
			ex_rtl_log_msg vvvv "Moving \`${1}' to \`${2}' w/ -fs";
			mv -f -- "${1}" "${2}"; _rc="${?}";
		fi; ;;
	mkdir|mkfifo|rm|source_opt|test|touch)
		while [ \( "${?}" -eq 0 \) -a \( ""${#}"" -gt 0 \) ]; do
			if [ -z "${1}" ]; then
				ex_rtl_log_msg failexit "Missing parameters (in: ${_op} ${*}.)";
			elif [ "${_op}" = mkdir ]\
			&& [ ! -d "${1}" ]\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
				if ex_rtl_fileop test "${1}"; then
					ex_rtl_fileop rm "${1}";
				fi;
				ex_rtl_log_msg vvvv "Making directory \`${1}'.";
				mkdir -p -- "${1}"; _rc="${?}";
			elif [ "${_op}" = mkfifo ]\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
				if ex_rtl_fileop test "${1}"; then
					ex_rtl_fileop rm "${1}";
				fi;
				ex_rtl_log_msg vvvv "Creating FIFO \`${1}'.";
				exp_rtl_fileop_check "${PREFIX}" "${1}";
				mkfifo -- "${1}"; _rc="${?}";
			elif [ "${_op}" = rm ]\
			&& ex_rtl_fileop test "${1}"\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
				ex_rtl_log_msg vvvv "Removing directory or file \`${1}'.";
				rm -rf -- "${1}"; _rc="${?}";
			elif [ "${_op}" = source_opt ]\
			&& ex_rtl_fileop test "${1}"\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
				ex_rtl_log_msg vvvv "Sourcing file \`${1}'.";
				. "${1}"; _rc="${?}";
			elif [ "${_op}" = test ]\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"\
			&& ! [ \( -L "${1}" \) -o \( -e "${1}" \) ]; then
				return 1;
			elif [ "${_op}" = touch ]\
			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
				ex_rtl_log_msg vvvv "Touching file \`${1}'.";
				touch -- "${1}"; _rc="${?}";
			fi; shift;
		done; ;;
	*)	ex_rtl_log_msg failexit "Error: ex_rtl_fileop() called w/ invalid parameter(s): ${*}"; ;;
	esac; return "${_rc}";
};

# vim:filetype=sh