From d01d16207d329c2c534d2d0b7ff9da76de97ca7b Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Wed, 01 Aug 2012 06:59:37 -0400
Subject: Write control library file.

---
diff --git a/lib/control.sh b/lib/control.sh
new file mode 100644
index 0000000..a5cdd46
--- /dev/null
+++ b/lib/control.sh
@@ -0,0 +1,126 @@
+#!@@SHELL@@
+#
+# opkhelper
+# lib/control
+# Functions for parsing control files.
+#
+# 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 "${_OH_CONTROL_SH}" ] && return 0
+_OH_CONTROL_SH=true
+
+. @@LIBDIR@@/messages
+. @@LIBDIR@@/locale
+. @@LIBDIR@@/util
+
+# Constant global parameters:
+OH_CONTROL_SOURCE_FIELDS_REQUIRED='Maintainer'
+OH_CONTROL_SOURCE_FIELDS_OPTIONAL='Build-Depends Homepage'
+OH_CONTROL_BINARY_FIELDS_REQUIRED='Architecture Platform Priority Description'
+OH_CONTROL_BINARY_FIELDS_OPTIONAL='Essential Depends Recommends Suggests '\
+'Pre-Depends Conflicts Provides Replaces'
+OH_CONTROL_SOURCE_FIELD_MAINTAINER=
+OH_CONTROL_SOURCE_FIELD_BUILD_DEPENDS=
+OH_CONTROL_SOURCE_FIELD_HOMEPAGE=
+OH_CONTROL_BINARY_FIELD_ARCHITECTURE=
+OH_CONTROL_BINARY_FIELD_PLATFORM=
+OH_CONTROL_BINARY_FIELD_PRIORITY=
+OH_CONTROL_BINARY_FIELD_DESCRIPTION=
+OH_CONTROL_BINARY_FIELD_ESSENTIAL=
+OH_CONTROL_BINARY_FIELD_DEPENDS=
+OH_CONTROL_BINARY_FIELD_RECOMMENDS=
+OH_CONTROL_BINARY_FIELD_SUGGESTS=
+OH_CONTROL_BINARY_FIELD_PRE_DEPENDS=
+OH_CONTROL_BINARY_FIELD_CONFLICTS=
+OH_CONTROL_BINARY_FIELD_PROVIDES=
+OH_CONTROL_BINARY_FIELD_REPLACES=
+
+oh_control_parse_source()
+{
+	_control_parse "${OH_SOURCE_DIR}/control" 'SOURCE'
+}
+
+oh_control_parse_binary()
+{
+	_control_parse "${OH_SOURCE_DIR}/${1}.pkg/control" 'BINARY'
+}
+
+_control_parse()
+{
+	_control="${1}"
+	_type="${2}"
+	_req=" $(eval echo \$\{OH_CONTROL_"${_type}"_FIELDS_REQUIRED) "
+	_opt=" $(eval echo \$\{OH_CONTROL_"${_type}"_FIELDS_OPTIONAL) "
+	_all="${_req}${_opt}"
+	_got=' '
+
+	# Initialize fields.
+	for _param in ${_all}; do
+		eval "${_param}="
+	done
+	_param=
+
+	while read -r _line; do
+		if [ "${_line# }" = "${_line}" ]; then
+			# "Name: Value" line.
+			_name="${_line%%:*}"
+			_value="${_line#*:}"
+			if [ -z "${_name}" -o "${_name}" = "${_line}" \
+				-o -z "${_value}" ]; then
+#				oh_warn "${oh_str_control_bad_nv}"
+				continue
+			fi
+			if [ "${_all% ${_name} }" = "${_all}" ]; then
+				# Unknown field.
+				:
+#				oh_warn "${oh_str_control_unknown_field}" \
+#					"${_control}" "${_name}"
+			else
+				# Remove field from list of required fields.
+				_req="$(echo "${_req}" | sed "s/${_name}//")"
+			fi
+			if [ "${_got% ${_name} }" != "${_got}" ]; then
+				# Duplicate field.
+				:
+#				oh_warn "${oh_str_control_duplicate_field}" \
+#					"${_control}" "${_field}"
+			else
+				_got="${_got}${_field} "
+			fi
+			_param="OH_CONTROL_${_type}_FIELD_$(LC_CTYPE=C \
+				tr '[:lower:]-' '[:upper:]_')"
+			eval "${_param}=\"${_value}\""
+		else
+			# Continuation line.
+			if [ -z "${_param}" ]; then
+#				oh_warn "${oh_str_control_found_continuation}"
+				continue
+			fi
+			_value="${_line# }"
+			eval "${_param}=\"${_param}
+${_value}\""
+		fi
+	done <"${_control}"
+
+	_req="${_req## }"
+	_req="${_req%% }"
+	if [ -n "${_req}" ]; then
+		# Missing required control fields.
+		:
+#		oh_error "${oh_str_control_missing_fields}" \
+#			"${_control}" "$(echo "${_req}" | sed 's/  / /g' | sed 's/ /,/g')"
+	fi
+}
diff --git a/locale/en_US.sh b/locale/en_US.sh
index 9ad08ad..bd32ab2 100644
--- a/locale/en_US.sh
+++ b/locale/en_US.sh
@@ -17,6 +17,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+# lib/control
+oh_str_control_bad_nv='badly formatted control field'
+oh_str_control_unknown_field='unrecognized field "%s"'
+oh_str_control_duplicate_field='duplicate field "%s"'
+oh_str_control_found_continuation='found continuation line where exepected start of field'
+oh_str_control_missing_fields='missing fields: %s'
+
 # lib/changelog
 oh_str_changelog_expect_first_heading='first heading'
 oh_str_changelog_expect_next_or_eof='next heading or eof'
--
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