1 files changed, 71 insertions, 0 deletions
diff --git a/subr/ex_pkg_dispatch.subr b/subr/ex_pkg_dispatch.subr
new file mode 100644
index 00000000..99c9ff8f
--- /dev/null
+++ b/subr/ex_pkg_dispatch.subr
@@ -0,0 +1,71 @@
+#
+# set -o errexit -o noglob are assumed.
+#
+
+ex_pkg_dispatch() {
+	local _tgt_name="${1}" _pkg_name="${2}"		\
+		_restart="${3}" _restart_at="${4}"	\
+		_pkg_step_cmds _pkg_step_cmd_args;
+	if [ "${_pkg_name#*_flavour_*}" != "${_pkg_name}" ]; then
+		PKG_NAME_PARENT="${_pkg_name%_flavour_*}";
+	fi;
+	(set -o errexit -o noglob;
+	ex_pkg_vars; ex_pkg_env;
+	ex_build_fileop mkdir "${PKG_BASE_DIR}";
+	ex_build_fileop cd "${PKG_BASE_DIR}";
+	if [ -n "${_restart}" ]\
+	|| [ "${_tgt_name}" = "INVARIANTS" ]\
+	|| ! ex_pkg_state_test "${_pkg_name}" finish; then
+		set -- $(ex_lfilter -not "${BUILD_STEPS}"	\
+				"$(ex_get_var_unsafe PKG_$(ex_toupper "${_pkg_name}")_BUILD_STEPS_DISABLE)");
+		while [ ${#} -gt 0 ]; do
+			_pkg_step_cmds=""; _pkg_step_cmd_args="";
+			case "${1#*:}" in
+			dynamic)
+				if [ "${_tgt_name}" = "INVARIANTS" ]; then
+					_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";
+				elif [ -n "${_restart}" ]; then
+					if [ -z "${_restart_at}" ]\
+					|| ex_lmatch "${_restart_at}" , "${1%:*}"; then
+						_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";
+					fi;
+				elif ! ex_pkg_state_test "${_pkg_name}" "${1%:*}"; then
+					_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";
+				fi; ;;
+			invariant)
+				_pkg_step_cmds="pkg_${1%:*}"; ;;
+			variant)
+				if ex_lmatch "${_restart_at}" "," "${1%:*}"; then
+					_pkg_step_cmds="pkg_${_pkg_name}_${1%:*} pkg_${1%:*}";
+				fi; ;;
+			virtual)
+				_pkg_step_cmds="pkg_${_pkg_name}_${1%:*}";
+				_pkg_step_cmd_args="${_restart_at:-ALL}"; ;;
+			all)
+				if ex_test_cmd "pkg_${_pkg_name}_${1%:*}"; then
+					"pkg_${_pkg_name}_${1%:*}" "${_restart_at:-ALL}";
+					break;
+				fi; ;;
+			finish)	ex_pkg_state_push "${_pkg_name}" finish; ;;
+			*)	;;
+			esac;
+			for __ in ${_pkg_step_cmds}; do
+				if ex_test_cmd "${__}"; then
+					ex_test_cmd "pkg_${_pkg_name}_${1%:*}_pre"	\
+						&& "pkg_${_pkg_name}_${1%:*}_pre"
+					"${__}" ${_pkg_step_cmd_args};
+					ex_test_cmd "pkg_${_pkg_name}_${1%:*}_post"	\
+						&& "pkg_${_pkg_name}_${1%:*}_post"
+					if [ "${1#*:}" != "invariant" ]\
+					&& [ ${#} -ge 2 ]; then
+						ex_pkg_state_push "${_pkg_name}" "${1%:*}" "-${2#*:}";
+					else
+						ex_pkg_state_push "${_pkg_name}" "${1%:*}";
+					fi; break;
+				fi;
+			done;
+		shift; done;
+	fi); return ${?};
+};
+
+# vim:filetype=sh