From 78d8d171c2bd91d52256467791ea7ea54fc1849a Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sat, 30 Nov 2013 21:13:16 -0500
Subject: lib/feed.sh: Rewrite to use parse_control().

---
(limited to 'lib/feed.sh')

diff --git a/lib/feed.sh b/lib/feed.sh
index 46c4cc2..6a68ecd 100644
--- a/lib/feed.sh
+++ b/lib/feed.sh
@@ -21,6 +21,15 @@
 _FEED_SM=1
 
 use fd
+use control
+
+feed_pkg_cb=
+feed_dep_fields=
+feed_pkgs=
+feed_deps_fd=
+feed_pkg_include=
+feed_pkg=
+feed_deps=
 
 feed_download()
 {
@@ -33,58 +42,76 @@ feed_download()
 
 feed_find_pkgs()
 {
-	local deps_file="${1}"
-	local line=
-	local deps_fd=
-	local pkg=
-	local deps=
-	local all_deps=
-	local dep=
-	local pkgs=
-	local new_deps=
+	local pkg_cb="${1}"
+	local dep_fields="${2}"
+	local deps_file="${3}"
+
+	feed_pkg_cb="${pkg_cb}"
+	feed_dep_fields=" $(printf '%s ' ${dep_fields})"
+	feed_pkgs=''
 
 	fopen "${deps_file}" 'w'
-	deps_fd=${FD}
+	feed_deps_fd=${FD}
+
+	feed_pkg_include='false'
+	feed_pkg=''
+	feed_deps=''
+
+	parse_control '-' feed_field_cb feed_para_cb 'Package'
+
+	fclose ${feed_deps_fd}
+
+	printf '%s\n' "${feed_pkgs# }"
+
+	return 0
+}
+
+feed_field_cb()
+{
+	local name="${1}"
+	local value="${2}"
+
+	if [ "x${name}" = 'xPackage' ]; then
+		feed_pkg="${value}"
+	elif [ "x${feed_dep_fields#* ${name} }" != "x${feed_dep_fields}" ]; then
+		feed_deps="${feed_deps}${value}, "
+	fi
+
+	if ${feed_pkg_cb} ${name} ${value}; then
+		feed_pkg_include='true'
+	fi
+
+	return 0
+}
 
-	pkg=''
-	all_deps=''
-	IFS=''
-	while read -r line; do
+feed_para_cb()
+{
+	local new_deps=
+	local dep=
+
+	if ${feed_pkg_include}; then
+		feed_pkgs="${feed_pkgs} ${feed_pkg}"
+	fi
+
+	new_deps=''
+	IFS=','
+	for dep in ${feed_deps%, }; do
 		unset IFS
-		if [ "x${line}" != 'x' ]; then
-			case "${line}" in
-				'Package:'*)
-					pkg="${line#Package:}"
-					pkg="${pkg## }"
-					;;
-				*'Depends:'*)
-					deps="${line#*Depends:}"
-					deps="${deps## }"
-					all_deps="${all_deps}${deps}, "
-					;;
-			esac
-		else
-			if profile_include_pkg "${pkg}"; then
-				pkgs="${pkgs} ${pkg}"
-			fi
-			new_deps=''
-			IFS=", ${HT}${LF}"
-			for dep in ${all_deps}; do
-				unset IFS
-				# Trim off " |.*$" and " (.*$" (versions and
-				# disjunctions).
-				dep="$(printf '%s ' ${dep} | cut -d ' ' -f 1)"
-				new_deps="${new_deps} ${dep}"
-			done
-			unset IFS
-			printf '%s%s\n' "${pkg}" "${new_deps}" >&${deps_fd}
-			pkg=''
-			all_deps=''
-		fi
+		# Trim off versions and disjunctions.
+		dep="${dep%%(*}"
+		dep="${dep%%|*}"
+		# Trim whitespace.
+		dep="${dep##[ ${HT}${LF}]}"
+		dep="${dep%%[ ${HT}${LF}]}"
+		new_deps="${new_deps} ${dep}"
 	done
 	unset IFS
 
-	fclose ${deps_fd}
+	printf '%s%s\n' "${feed_pkg}" "${new_deps}" >&${feed_deps_fd}
+
+	feed_pkg_include='false'
+	feed_pkg=''
+	feed_deps=''
 
 	return 0
 }
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