From e9c2b88ce2b4ec690deb1557940026b7cc76fcf1 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 21 Oct 2012 23:07:29 -0400
Subject: Write "buildsystem" library module.

---
diff --git a/lib/Makefile.in b/lib/Makefile.in
index c8d0b07..4f26b57 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -35,7 +35,8 @@ sed_script = s&@@PACKAGE_NAME@@&$(package_name)&;\
 .SUFFIXES:
 .SUFFIXES: .sh .sm
 
-SRCS = load.sh                          common.sh
+SRCS = load.sh                          common.sh                        \
+       buildsystem.sh
 OBJS = $(SRCS:.sh=.sm)
 
 distdir = ../$(package_name)-$(package_version)/lib
diff --git a/lib/buildsystem.sh b/lib/buildsystem.sh
new file mode 100644
index 0000000..65af7df
--- /dev/null
+++ b/lib/buildsystem.sh
@@ -0,0 +1,96 @@
+# opkhelper
+# lib/buildsystem
+# Interface for interacting with software build systems.
+#
+# Copyright (C) 2012 Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+[ -n "${_OH_BUILDSYSTEM_SM}" ] && return 0
+_OH_BUILDSYSTEM_SM='true'
+
+_OH_BUILDSYSTEMS='
+'
+
+_OH_BUILDSYSTEM_BUILD_DIR='src'
+_OH_BUILDSYSTEM_SYSTEM=''
+
+oh_buildsystems_init()
+{
+	_oh_local _ohbsi_bs
+
+	for _ohbsi_bs in ${_OH_BUILDSYSTEMS}; do
+		oh_use "buildsystem/${_ohbsi_bs}"
+	done
+}
+
+oh_set_buildsystem_option()
+{
+	_oh_local _ohsbso_name _obsbso_value
+
+	if [ ${#} -eq 2 ]; then
+		_ohsbso_name="${1}"
+		_ohsbso_value="${2}"
+	else
+		_oh_return 125
+		return ${?}
+	fi
+
+	case "${_ohsbso_name}" in
+		'build-dir')
+			_OH_BUILDSYSTEM_BUILD_DIR="${value}"
+			;;
+		'build-system')
+			_OH_BUILDSYSTEM_SYSTEM="${value}"
+			;;
+		*)
+			_oh_return 125
+			return ${?}
+			;;
+	esac
+}
+
+oh_buildsystem_do()
+{
+	_oh_local _ohbsd_step _ohbsd_bs _ohbsd_done
+
+	if [ ${#} -ge 1 ]; then
+		_ohbsd_step="${1}"
+		shift 1
+	else
+		_oh_return 125
+		return ${?}
+	fi
+
+	_ohbsd_done='false'
+
+	if [ -n "${_OH_BUILDSYSTEM_SYSTEM}" ]; then
+		if "_oh_${_OH_BUILDSYSTEM_SYSTEM}_can_${_ohbsd_step}"; then
+			"_oh_${_OH_BUILDSYSTEM_SYSTEM}_${_ohbsd_step}" "${@}"
+			_ohbsd_done='true'
+		fi
+	else
+		for _ohbsd_bs in ${_OH_BUILDSYSTEMS}; do
+			if "_oh_${_ohbsd_bs}_can_${_ohbsd_step}"; then
+				"_oh_${_ohbsd_bs}_${_ohbsd_step}" "${@}"
+				_ohbsd_done='true'
+				break
+			fi
+		done
+	fi
+
+	if ! ${_ohbsd_done}; then
+		: error
+	fi
+}
--
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