From 9f58f76988085e31f3211a4f4735bacf537fafff Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Sun, 15 Apr 2012 07:25:22 +0200
Subject: [PATCH] command_util: grep source files only once.

Currently we grep once for each template member. This patch speeds
up the header mode of command_util.sh by a factor of 3.
---
 command_util.sh | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/command_util.sh b/command_util.sh
index 2bceda43..b37c5b03 100755
--- a/command_util.sh
+++ b/command_util.sh
@@ -165,15 +165,17 @@ com_man()
 
 make_proto()
 {
-	local source_file match="" CR='
+	local regex='\(__noreturn \)*\(static \)*int com_'
+	local source_file match="" all_commands CR='
 '
 	if test -n "$prototype"; then
 		result="$prototype$CR"
 		return
 	fi
+	all_commands="$(cat $source_files | grep "$regex")"
 	result=
 	for source_file in $source_files; do
-		match=$(grep "^\(__noreturn \)*\(static \)*int com_$name_txt(" $source_file | head -n 1 | sed -e 's/$/;/1')
+		match=$(grep "$regex$name_txt(" <<< "$all_commands" | head -n 1 | sed -e 's/$/;/1')
 		if test -n "$match"; then
 			result="$result$match$CR"
 			break
@@ -216,15 +218,12 @@ template_loop()
 	local t_source_files="$source_files"
 	local member
 	for member in $template_members; do
-		local sed_cmd="sed -e s/@member@/$member/g"
-		#echo "sed_cmd: $sed_cmd"
-		name_txt=$(echo "$t_name" | $sed_cmd)
-		#name_txt="$tname"
-		perms_txt=$(echo "$t_perms" | $sed_cmd)
-		desc_txt=$(echo "$t_desc" | $sed_cmd)
-		usage_txt=$(echo "$t_usage" | $sed_cmd)
-		help_txt=$(printf "%s\n" "$t_help" | $sed_cmd)
-		prototype=$(echo "$template_prototype" | $sed_cmd)
+		name_txt="${t_name//@member@/$member}"
+		perms_txt="${t_perms//@member@/$member}"
+		desc_txt="${t_desc//@member@/$member}"
+		usage_txt="${t_usage//@member@/$member}"
+		help_txt="${t_help//@member@/$member}"
+		prototype="${template_prototype//@member@/$member}"
 		result=
 		$1
 		loop_result="$loop_result$result"
-- 
2.39.2