#

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

#

#

# exp_pkg_check_restart_at() - XXX

# @_rspec_at:		in reference to restart build step list

#

# Calling convention:	in ref. @_rspec_at

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_check_restart_at() {

	local _epcra_rspec_at="${1#\$}" _epcra_len="" _epcra_rc=0 _epcra_spec_at=""; _status=""

	if ! rtl_llift2 "${_epcra_rspec_at}" \$_epcra_spec_at "," " "\

	|| ! rtl_lfilter3 \$_epcra_spec_at "${DEFAULT_BUILD_STEPS} ALL LAST"\

	|| ! rtl_llength2 \$_epcra_spec_at \$_epcra_len; then

		_epcra_rc=1;

	elif [ "${_epcra_len}" -gt 0 ]; then

		_status="unknown build step(s) \`${_epcra_spec_at}'"; _epcra_rc=1;

	fi; return "${_epcra_rc}";

};

#

# exp_pkg_expand_restart_at_spec() - XXX

# @_rset:		in reference to restart virtual build step set

# @_rspec_at:		inout reference to restart build step list

#

# Calling convention:	in ref. @_rset, inout ref. @_rspec_at

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_expand_restart_at_spec() {

	local	_eperas_rset="${1#\$}" _eperas_rspec_at="${2#\$}" _eperas_at=""			\

		_eperas_rc=0 _eperas_spec_at="" _eperas_spec_at_=""; _status="";

	eval _eperas_spec_at='${'"${_eperas_rspec_at}"'}';

	case "${_eperas_spec_at}" in

	ALL|LAST|"")

		;;

	^*)

		_eperas_spec_at="${_eperas_spec_at#^}";

		if exp_pkg_expand_restart_at_virtual						\

				"${_eperas_spec_at}" \$_eperas_spec_at				\

				"${_eperas_rset}"						\

		&& exp_pkg_check_restart_at \$_eperas_spec_at; then

			rtl_llift2 \$DEFAULT_BUILD_STEPS "${_eperas_rspec_at}" " 	" ",";

			rtl_llift2 \$_eperas_spec_at \$_eperas_spec_at_ "," " ";

			for _eperas_at in ${_eperas_spec_at_}; do

				rtl_lfilter3 "${_eperas_rspec_at}" "${_eperas_at}" ",";

			done; rtl_lfilter3 "${_eperas_rspec_at}" "finish" ",";

		else

			_eperas_rc=1;

		fi; ;;

	\<=*|\<*|\>=*|\>*)

		exp_pkg_expand_restart_at_spec_cmp						\

			"${_eperas_rset}" "${_eperas_rspec_at}"; _eperas_rc="${?}"; ;;

	*)

		if ! exp_pkg_expand_restart_at_virtual						\

				"${_eperas_spec_at}" "${_eperas_rspec_at}"			\

				"${_eperas_rset}"; then

			_eperas_rc=1;

		fi; ;;

	esac;

	if [ "${_eperas_rc}" -eq 0 ]; then

		if ! exp_pkg_check_restart_at "${_eperas_rspec_at}"; then

			_epprs_rc=1;

		elif eval [ '"${'"${_eperas_rspec_at}"':+1}"' != 1 ]; then

			_status="zero-length build step list"; _epprs_rc=1;

		fi;

	fi;

	return "${_eperas_rc}";

};

#

# exp_pkg_expand_restart_at_spec_cmp() - XXX

# @_rset:		in reference to restart virtual build step set

# @_rspec_at:		inout reference to restart build step list

#

# Calling convention:	in ref. @_rset, inout ref. @_rspec_at

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_expand_restart_at_spec_cmp() {

	local	_eperasc_rset="${1#\$}" _eperasc_rspec_at="${2#\$}" _eperasc_at=""		\

		_eperasc_eqfl="" _eperasc_foundfl="" _eperasc_ltfl="" _eperasc_rc=0		\

		_eperasc_spec_at="" _eperasc_spec_at0="";

	eval _eperasc_spec_at0='${'"${_eperasc_rspec_at}"'}';

	[ "${_eperasc_spec_at0#<}" = "${_eperasc_spec_at0}" ]; _eperasc_ltfl="${?}";

	if [ "${_eperasc_spec_at0#[<>]=}" != "${_eperasc_spec_at0}" ]; then

		_eperasc_spec_at0="${_eperasc_spec_at0#[<>]=}"; _eperasc_eqfl=1;

	else

		_eperasc_spec_at0="${_eperasc_spec_at0#[<>]}"; _eperasc_eqfl=0;

	fi; _eperasc_spec_at="";

	if exp_pkg_expand_restart_at_virtual							\

			"${_eperasc_spec_at0%%,*}" \$_eperasc_spec_at0				\

			"${_eperasc_rset}"							\

	&& exp_pkg_check_restart_at \$_eperasc_spec_at0; then

		if [ \( "${_eperasc_eqfl}" -eq 1 \) -a \( "${_eperasc_ltfl}" -eq 1 \) ]\

		|| [ \( "${_eperasc_eqfl}" -eq 0 \) -a \( "${_eperasc_ltfl}" -eq 0 \) ]; then

			_eperasc_spec_at0="${_eperasc_spec_at0##*,}";

		elif [ \( "${_eperasc_eqfl}" -eq 1 \) -a \( "${_eperasc_ltfl}" -eq 0 \) ]\

		||   [ \( "${_eperasc_eqfl}" -eq 0 \) -a \( "${_eperasc_ltfl}" -eq 1 \) ]; then

			_eperasc_spec_at0="${_eperasc_spec_at0%%,*}";

		fi;

		_eperasc_foundfl=0; for _eperasc_at in ${DEFAULT_BUILD_STEPS}; do

			if [ "${_eperasc_ltfl}" -eq 1 ]; then

				if [ "${_eperasc_at}" = "${_eperasc_spec_at0%%,*}" ]; then

					if [ "${_eperasc_eqfl}" -eq 1 ]; then

						_eperasc_spec_at="${_eperasc_spec_at:+${_eperasc_spec_at},}${_eperasc_at}";

					fi; break;

				fi;

			else

				if [ "${_eperasc_at}" = "${_eperasc_spec_at0%%,*}" ]; then

					_eperasc_foundfl=1; [ "${_eperasc_eqfl}" -eq 0 ] && continue;

				fi; [ "${_eperasc_foundfl}" -eq 0 ] && continue;

			fi;

			_eperasc_spec_at="${_eperasc_spec_at:+${_eperasc_spec_at},}${_eperasc_at}";

		done;

	else

		_eperasc_rc=1;

	fi;

	eval ${_eperasc_rspec_at}='${_eperasc_spec_at}';

	return "${_eperasc_rc}";

};

#

# exp_pkg_expand_restart_at_virtual() - XXX

# @_spec_at:		restart build step list

# @_rspec_at_new:	out reference to new restart build step list

# @_rset:		inout reference to restart virtual build step set

#

# Calling convention:	inout ref. @_rspec_recursive

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_expand_restart_at_virtual() {

	local	_epera_spec_at="${1}" _epera_rspec_at_new="${2#\$}" _epera_rset="${3#\$}"	\

		_epera_at="" _epera_IFS0="${IFS:- 	}" _epera_rc=0 _epera_spec_at_new=""	\

		IFS; _status="";

	eval ${_epera_rspec_at_new}=;

	IFS=","; set -- ${_epera_spec_at}; IFS="${_epera_IFS0}";

	while [ "${#}" -gt 0 ]; do

		_epera_at="${1}"; shift;

		if [ "${_epera_at#@}" != "${_epera_at}" ]; then

			_epera_at="${_epera_at#@}";

			if [ "${_epera_at%[^0-9a-zA-Z_]*}" != "${_epera_at}" ]; then

				_status="invalid virtual build step \`${_epera_at}'"; _epera_rc=1;

			elif eval [ '"${'"${_epera_rset}${_epera_at}"':+1}"' = 1 ]; then

				eval _epera_at='${'"${_epera_rset}${_epera_at}"'}';

			else

				_status="unknown virtual build step \`${_epera_at}'"; _epera_rc=1;

			fi;

		fi;

		eval ${_epera_rspec_at_new}='${'"${_epera_rspec_at_new}"':+${'"${_epera_rspec_at_new}"'},}${_epera_at}';

	done;

	return "${_epera_rc}";

};

#

# exp_pkg_expand_restart_recursive() - XXX

# @_rspec:		inout reference to restart {specification,package name list}

# @_rrecursive:		out reference to recursion flag

#

# Calling convention:	inout ref. @_rspec, out ref. @_rrecursive

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_expand_restart_recursive() {

	local _eperr_rspec="${1#\$}" _eperr_rrecursive="${2#\$}" _eperr_spec=""; _status=""

	eval _eperr_spec='${'"${_eperr_rspec}"'}';

	case "${_eperr_spec}" in

	\*\*\*[a-zA-Z]*)

			eval ${_eperr_rspec}='${_eperr_spec#\*\*\*}' ${_eperr_rrecursive}=3; ;;

	\*\*[a-zA-Z]*)	eval ${_eperr_rspec}='${_eperr_spec#\*\*}' ${_eperr_rrecursive}=2; ;;

	\*[a-zA-Z]*)	eval ${_eperr_rspec}='${_eperr_spec#\*}' ${_eperr_rrecursive}=1; ;;

	ALL)		eval ${_eperr_rrecursive}=2; ;;

	LAST)		eval ${_eperr_rrecursive}=0; ;;

	esac;

	return 0;

};

#

# exp_pkg_expand_restart_spec() - XXX

# @_rspec:		inout reference to restart {specification,package name list}

# @_rspec_at:		out reference to restart build step list

#

# Calling convention:	inout ref. @_rspec, out ref. @_rspec_at, out ref. @_rrecursive

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_expand_restart_spec() {

	local	_epers_rspec="${1#\$}" _epers_rspec_at="${2#\$}" _epers_last_pkg=""	\

		_epers_rc=0 _epers_spec="" _epers_spec_at="" _epers_spec_at0="";

	eval _epers_spec='${'"${_epers_rspec}"'}';

	case "${_epers_spec}" in

	"")	eval ${_epers_rspec_at}=; ;;

	ALL)	eval ${_epers_rspec_at}=ALL; ;;

	LAST|LAST:*)

		case "${_epers_spec}" in

		LAST)	eval ${_epers_rspec_at}=LAST; ;;

		LAST:*)	eval ${_epers_rspec_at}='${_epers_spec#LAST:}'; ;;

		esac;

		if [ "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME:+1}" = 1 ]\

		&& [ -e "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]; then

			if read -r _epers_last_pkg <"${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}"\

			&& rtl_fileop rm "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}"; then

				eval ${_epers_rspec}='${_epers_last_pkg}';

			else

				_status="failed to read or clear status of last failed package \`${_epers_last_pkg}'"; _epers_rc=1;

			fi;

		else

			_status="cannot rebuild last failed package"; _epers_rc=1;

		fi; ;;

	*:*)	eval ${_epers_rspec}='${_epers_spec%:*}' ${_epers_rspec_at}='${_epers_spec#*:}'; ;;

	*)	eval ${_epers_rspec_at}= ${_epers_rspec_at}=ALL; ;;

	esac;

	return "${_epers_rc}";

};

#

# exp_pkg_init_restart_at_virtual() - XXX

# @_rset:		out reference to restart virtual build step set

#

# Calling convention:	out ref. @_rset

# Returns:		zero (0) on success, non-zero (>0) on failure

#

exp_pkg_init_restart_at_virtual() {

	local _eperav_rset="${1#\$}" _eperav_step="" _eperav_step_virtual="" _epera_steps="";

	rtl_lfilter2 \$DEFAULT_BUILD_STEPS \$_epera_steps "finish";

	for _eperav_step in ${_epera_steps}; do

		_eperav_step_virtual="${_eperav_step%%_*}";

		if eval [ '"${'"${_eperav_rset}${_eperav_step_virtual}"':+1}"' != 1 ]; then

			eval ${_eperav_rset}='"${'"${_eperav_rset}"':+${'"${_eperav_rset}"'},}${_eperav_step_virtual}"';

		fi;

		eval ${_eperav_rset}${_eperav_step_virtual}='"${'"${_eperav_rset}${_eperav_step_virtual}"':+${'"${_eperav_rset}${_eperav_step_virtual}"'},}${_eperav_step}"';

	done; return 0;

};

#

# ex_pkg_process_restart_spec() - XXX

# @_rspec:		inout reference to restart {specification,package name list}

# @_rspec_at:		out reference to restart build step list

# @_rrecursive:		out reference to restart recursion flag

#

# Calling convention:	inout ref. @_rspec, out ref. @_rspec_at

# Returns:		zero (0) on success, non-zero (>0) on failure

#

ex_pkg_process_restart_spec() {

	local	_epprs_rspec="${1#\$}" _epprs_rspec_at="${2#\$}" _epprs_rrecursive="${3#\$}"	\

		_epprs_at="" _epprs_rc=0 _epprs_spec_at_new="" _epprs_step="" _epprs_step1=""	\

		_epprs_virtual_set=""; _status="";

	if eval [ '"${'"${_epprs_rspec}"':+1}"' = 1 ]; then

		if exp_pkg_init_restart_at_virtual \$_epprs_virtual_set					\

		&& exp_pkg_expand_restart_spec "${_epprs_rspec}" \$_epprs_spec_at_new			\

		&& exp_pkg_expand_restart_recursive "${_epprs_rspec}" "${_epprs_rrecursive}"		\

		&& exp_pkg_expand_restart_at_spec \$_epprs_virtual_set \$_epprs_spec_at_new; then

			eval ${_epprs_rspec_at}=;

			case "${_epprs_spec_at_new}" in

			ALL|LAST)

				eval ${_epprs_rspec_at}='${_epprs_spec_at_new}'; ;;

			*)

				for _epprs_at in ${DEFAULT_BUILD_STEPS}; do

					if rtl_lmatch "${_epprs_at}" "${_epprs_spec_at_new}" ","; then

						eval ${_epprs_rspec_at}='${'"${_epprs_rspec_at}"':+${'"${_epprs_rspec_at}"'},}${_epprs_at}';

					fi;

				done;

				if eval [ '"${'"${_epprs_rspec_at}"'##*,}"' != "finish" ]; then

					rtl_lfilter2 "${_epprs_rspec_at}" \$_epprs_step "clean,finish" ","; _epprs_step="${_epprs_step##*,}";

					rtl_lfilter2 \$DEFAULT_BUILD_STEPS \$_epprs_step1 "clean finish"; _epprs_step1="${_epprs_step1##* }";

					if [ "${_epprs_step}" = "${_epprs_step1}" ]; then

						eval ${_epprs_rspec_at}='${'"${_epprs_rspec_at}"':+${'"${_epprs_rspec_at}"'},}finish';

					fi;

				fi;

				eval echo '${'"${_epprs_rspec}"'}'; ;;

			esac; rtl_llift3 "${_epprs_rspec}" "," " " || _epprs_rc=1;

		else

			_epprs_rc=1;

		fi;

		rtl_sunset \$_epprs_virtual_set;

	fi;

	return "${_epprs_rc}";

};

# vim:filetype=sh