From 273cc06b73b8157d749adc23af3a3697cfdcfddb Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Fri, 07 Sep 2012 09:33:31 -0400
Subject: Implement ob_parse_dep, _ob_dep_arch_is_concerned.

Also, begin ob_reduce_deps.
---
(limited to 'lib/deps.sh')

diff --git a/lib/deps.sh b/lib/deps.sh
new file mode 100644
index 0000000..49d3cb2
--- /dev/null
+++ b/lib/deps.sh
@@ -0,0 +1,185 @@
+# opkbuild
+# lib/deps
+# Functions for parsing dependency field values.
+#
+# 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 3 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 "${_OB_DEPS_SM}" ] && return 0
+_OB_DEPS_SM='true'
+
+ob_parse_dep()
+{
+	_obpd_opt=
+	_obpd_pkg_var=
+	_obpd_archqual_var=
+	_obpd_rel_var=
+	_obpd_ver_var=
+	_obpd_arches_var=
+	_obpd_host_arch=
+	_obpd_dep=
+	_obpd_pkgarchqual=
+	_obpd_relver=
+	_obpd_arches=
+
+	while getopts 'p:q:r:v:A:a:' _obpd_opt; do
+		case "${_obpd_opt}" in
+			p)
+				_obpd_pkg_var="${OPTARG}"
+				;;
+			q)
+				_obpd_archqual_var="${OPTARG}"
+				;;
+			r)
+				_obpd_rel_var="${OPTARG}"
+				;;
+			v)
+				_obpd_ver_var="${OPTARG}"
+				;;
+			A)
+				_obpd_arches_var="${OPTARG}"
+				;;
+			a)
+				_obpd_host_arch="${OPTARG}"
+				;;
+			?)
+				#unset
+				return 125
+				;;
+		esac
+	done
+	shift $(($OPTIND - 1))
+
+	if [ "${#}" -eq 1 ]; then
+		# Separate components with spaces.
+		_obpd_dep="$(echo "${1}" | \
+			sed 's/\([(\[]\)/ \1/g;s/\([<>=][<>=]*\)/\1 /g')"
+		# Remove leading, trailing, and duplicate spaces.
+		_obpd_dep="$(IFS=' ' echo ${_obpd_dep})"
+	else
+		#unset
+		return 125
+	fi
+
+	# <pkg>[:<archqual>] [(<rel> <ver>)] [\[<arches>\]]
+
+	_obpd_pkgarchqual="${_obpd_dep%% *}"
+	_obpd_dep=" ${_obpd_dep#* }"
+	if [ -n "${_obpd_pkg_var}" ]; then
+		eval "${_obpd_pkg_var}=${_obpd_pkgarchqual%:*}"
+	fi
+	if [ -n "${_obpd_archqual_var}" ]; then
+		eval "${_obpd_archqual_var}=${_obpd_pkgarchqual##*:}"
+	fi
+
+	if [ "${_obpd_dep# (*)}" != "${_obpd_dep}" ]; then
+		_obpd_relver="${_obpd_dep# (}"
+		_obpd_relver="${_obpd_relver%%)*}"
+		_obpd_dep="${_obpd_dep#(*)}"
+		if [ -n "${_obpd_rel_var}" ]; then
+			eval "${_obpd_rel_var}=${_obpd_relver% *}"
+		fi
+		if [ -n "${_obpd_ver_var}" ]; then
+			eval "${_obpd_ver_var}=${_obpd_relver##* }"
+		fi
+	fi
+
+	if [ "${_obpd_dep# \[*\]}" != "${_obpd_dep}" ]; then
+		_obpd_arches="${_obpd_dep# \[}"
+		_obpd_arches="${_obpd_arches%%\]*}"
+		# TODO: Reduce arch is host arch is given.
+		if [ -n "${_obpd_arches_var}" ]; then
+			eval "${_obpd_arches_var}=${_obpd_arches}"
+		fi
+	fi
+
+	return 0
+}
+
+ob_reduce_deps()
+{
+	_obrd_opt=
+	_obrd_host_arch=
+	_obrd_union=false
+	_obrd_deps=
+	_obrd_orig_ifs=
+	_obrd_dep_and=
+	_obrd_dep_or=
+
+	while getopts 'a:u' _obrd_opt; do
+		case "${_obrd_opt}" in
+			a)
+				_obrd_host_arch="${OPTARG}"
+				;;
+			u)
+				_obrd_union=true
+				;;
+			?)
+				#unset
+				return 125
+				;;
+		esac
+	done
+	shift $(($OPTIND - 1))
+
+	if [ "${#}" -eq 1 ]; then
+		_obrd_deps="${1}"
+	else
+		#unset
+		return 125
+	fi
+
+	_obrd_orig_ifs="${IFS}"
+	IFS=', '
+	for _obrd_dep_and in ${_obrd_deps}; do
+		if ! ${_obrd_union}; then
+			IFS='| '
+			for _obrd_dep_or in ${_obrd_deps}; do
+				:
+			done
+		else
+			:
+		fi
+	done
+
+	return 0
+}
+
+_ob_dep_arch_is_concerned()
+{
+	_obdaic_host_arch="${1}"
+	_obdaic_arches="${2}"
+	_obdaic_arch=
+	_obdaic_not_arch=
+	_obdaic_seen_arch=1
+
+	for _obdaic_arch in ${_obdaic_arches}; do
+		_obdaic_not_arch="${_obdaic_arch#!}"
+		if [ "${_obdaic_not_arch}" != "${_obdaic_arch}" ]; then
+			if ob_match_arch "${_obdaic_host_arch}" "${_obdaic_not_arch}"; then
+				_obdaic_seen_arch=1
+				break
+			else
+				_obdaic_seen_arch=0
+			fi
+		elif ob_match_arch "${_obdaic_host_arch}" "${_obdaic_arch}"; then
+			_obdaic_seen_arch=0
+			break
+		fi
+	done
+
+	unset _obdaic_host_arch _obdaic_arches _obdaic_arch _obdaic_not_arch
+	return ${_obdaic_seen_arch}
+}
--
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