#

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

#

#

# exp_pkg_env_defaults() - set package variable defaults for single named package

# @_build_steps_default:	list of default build steps

# @_pkg_name:			single package name

# @_workdir:			pathname to build-specific temporary directory

#

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

#

exp_pkg_env_defaults() {

	local _build_steps_default="${1}" _pkg_name="${2}" _workdir="${3}";

	: ${PKG_NAME:="${_pkg_name}"};

	: ${MIDIPIX_BUILD_PWD:="$(pwd)"};

	: ${PKG_BASE_DIR:="${_workdir}/${_pkg_name}-${PKG_BUILD_TYPE}-${PKG_TARGET}"};

	if [ -n "${PKG_BUILD_STEPS_DISABLE:-}" ]; then

		: ${PKG_BUILD_STEPS:="$(rtl_lfilter "${_build_steps_default}" "${PKG_BUILD_STEPS_DISABLE:-}")"};

	else

		: ${PKG_BUILD_STEPS:="${_build_steps_default}"};

	fi;

	if [ -n "${PKG_URL:-}" ]; then

		: ${PKG_FNAME:="${PKG_URL##*/}"};

	fi;

	if [ -z "${PKG_SUBDIR:-}" ]; then

		if [ -n "${PKG_URLS_GIT:-}" ]\

		&& [ -n "${PKG_FNAME:-}" ]; then

			rtl_log_msg fatalexit "Error: \${PKG_SUBDIR} must be specified given both \${PKG_FNAME} and \${PKG_URLS_GIT}.";

		elif [ -n "${PKG_URLS_GIT:-}" ]; then

			PKG_SUBDIR="${PKG_URLS_GIT%%=*}";

		else case "${PKG_FNAME:-}" in

		*.t*)	PKG_SUBDIR="${PKG_FNAME%%.t*}"; ;;

		*)	PKG_SUBDIR="${_pkg_name}"; ;;

		esac; fi;

	fi;

	if [ -z "${PKG_BUILD_DIR:-}" ]; then

		case "${PKG_IN_TREE:-0}" in

		0) PKG_BUILD_DIR="obj"; ;;

		1) PKG_BUILD_DIR="${PKG_SUBDIR}"; ;;

		esac;

	fi;

	PKG_BUILD_DIR="${PKG_BASE_DIR}/${PKG_BUILD_DIR}";

	PKG_CONFIGURE="${PKG_BASE_DIR}/${PKG_CONFIGURE:-${PKG_SUBDIR}/configure}";

	PKG_DESTDIR="${PKG_BASE_DIR}/${PKG_DESTDIR:-destdir}";

	PKG_DESTDIR_HOST="${PKG_BASE_DIR}/${PKG_DESTDIR_HOST:-destdir_host}";

};

#

# exp_pkg_env_set() - set package variables for single named package

# @_build_vars_default:	list of default build variables

# @_group_name:		build group name

# @_nounset:		don't clear package variable namespace

# @_pkg_name:		single package name

#

# Sets package variables from either defaults, defaults specific to build type,

# build group, package to inherit from if any, or package for a single named

# package, exports variables optionally named in ${PKG_ENV_VARS_EXTRA}, and

# clears the package variable namespace.

#

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

#

exp_pkg_env_set() {

	local	_build_vars_default="${1}" _group_name="${2}" _nounset="${3}"		\

		_pkg_name="${4}" _cmd_name="" _var_prefixes="" _vars_set=""		\

		_vname="" IFS IFS0;

	rtl_set_vars _vars_set BUILD_TYPE "DEFAULT ${_group_name} PKG_${_pkg_name}";

	rtl_set_vars _vars_set INHERIT_FROM "PKG_${_pkg_name}";

	_var_prefixes="$(rtl_toupper "DEFAULT DEFAULT_${PKG_BUILD_TYPE} ${_group_name}")";

	for _vname in $(rtl_lfilter "${_build_vars_default}" BUILD_TYPE); do

		if [ -n "${PKG_INHERIT_FROM:-}" ]; then

			rtl_set_vars _vars_set "${_vname}"				\

				"$(rtl_lconcat "${_var_prefixes}"			\

				"$(rtl_toupper "PKG_${PKG_INHERIT_FROM} PKG_${PKG_INHERIT_FROM}_${BUILD_KIND} PKG_${_pkg_name} PKG_${_pkg_name}_${BUILD_KIND}")")";

		else

			rtl_set_vars _vars_set "${_vname}"				\

				"$(rtl_lconcat "${_var_prefixes}"			\

				"$(rtl_toupper "PKG_${_pkg_name} PKG_${_pkg_name}_${BUILD_KIND}")")";

		fi;

	done;

	IFS0="${IFS:- }"; IFS=":"; for _vname in ${PKG_ENV_VARS_EXTRA:-}; do

		export "${_vname}";

	done; IFS="${IFS0}";

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

		rtl_unset_vars $(rtl_lfilter						\

			"$(set | sed -ne '/^PKG_[^=]*=/s/=.*$//p' | paste -s -d " ")"	\

			"${_vars_set}");

	fi;

	for _vname in AR CC CXX PKG_CONFIG RANLIB; do

		if eval [ '"${PKG_'"${_vname}"':+1}"' = 1 ]\

		&& eval [ '"${PKG_'"${_vname}"'#/}"' = '"${_cmd_name:=${PKG_'"${_vname}"'}}"' ]; then

			eval PKG_${_vname}='$(which "${_cmd_name}")';

		fi; _cmd_name="";

	done;

};

#

# ex_pkg_env() - set package variables for single named package

# @_build_steps_default:	list of default build steps

# @_build_vars_default:		list of default build variables

# @_group_name:			build group name

# @_nounset:			don't clear package variable namespace

# @_pkg_name:			single package name

# @_restart_at:			optional comma-separated list of build steps at which to rebuild or ALL or LAST

# @_workdir:			pathname to build-specific temporary directory

#

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

#

ex_pkg_env() {

	local	_build_steps_default="${1}" _build_vars_default="${2}" _group_name="${3}"	\

		_nounset="${4}" _pkg_name="${5}" _restart_at="${6}" _workdir="${7}"		\

		_vars_file="" _vname="";

	if ! _vars_file="$(rtl_get_var_unsafe -u "PKG_${_pkg_name}_VARS_FILE")"\

	|| [ "${#_vars_file}" -eq 0 ]; then

		_vars_file="vars/${_pkg_name}.vars";

	fi;

	rtl_fileop source_opt "${_vars_file}" "${_group_name}/${_pkg_name}.${_group_name}";

	if ! exp_pkg_env_set "${_build_vars_default}" "${_group_name}" "${_nounset}" "${_pkg_name}"\

	|| ! exp_pkg_env_defaults "${_build_steps_default}" "${_pkg_name}" "${_workdir}"; then

		return 1;

	fi;

};

#

# ex_pkg_state_set() - update build step status for single named package

# @_pkg_name:		single package name

# @_build_step:		build step set status of

# [@${@}]:		optional list of build steps to invalidate status of

#

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

#

ex_pkg_state_set() {

	rtl_state_set "${_workdir}" "${@}";

};

#

# ex_pkg_state_test() - test build step status of single named package

# @_pkg_name:		single package name

# @_build_step:		build step to test status of

# @_restart_at:		optional comma-separated list of build steps at which to rebuild or ALL or LAST

#

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

#

ex_pkg_state_test() {

	rtl_state_test "${_workdir}" "${@}";

};

# vim:filetype=sh