jw-pkg: Fix ignored target file metadata

During an invokation owner, group and mode definitions of one target file could
leak into another.

Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/jw-pkg

@@ -272,13 +272,17 @@ cmd_rm_template_output()
 
 cmd_compile_templates()
 {
+	__md() {
+		stat --format '%U:%G %a' "$1" 2>/dev/null
+	}
+
 	local ext_from="$template_exts" # TODO: support more than one
 	local ext_from_re=`echo $template_exts | sed 's/\./\\./g'`
 	local ext_to=""
 	local ext_tables="$table_exts"
-	local group=root
-	local owner=root
-	local mode=600
+	local default_group=root
+	local default_owner=root
+	local default_mode=600
 	local conf_patt="^[ 	]*# *conf:"
 	local missing_table=0
 	local backup=0
@@ -288,15 +292,15 @@ cmd_compile_templates()
 	while [ "${1:0:1}" = '-' ]; do
 	case "$1" in
 	-o)
-		owner="$2"
+		default_owner="$2"
 		shift
 		;;
 	-m)
-		mode="$2"
+		default_mode="$2"
 		shift
 		;;
 	-g)
-		group="$2"
+		default_group="$2"
 		shift
 		;;
 	-b)
@@ -328,12 +332,20 @@ cmd_compile_templates()
 		# TODO: use mktemp -d and keep temporary files in read-only dir
 		local tmp=$to.tmp
 		log -n "Applying macros in $table to $f"
+		local mode=$default_mode
+		local owner=$default_owner
+		local group=$default_group
+		local diff=""
 		eval `sed "/$conf_patt/ !d; s/$conf_patt//" $table`
 		sed 's|^[ 	]*#.*||; s|/|\\/|g; s|\([^ 	=]\+\)[ 	=]\+\(.*\)|s/\1/\2/g|' $table | sed -f - $f > $tmp
 		chmod $mode $tmp
 		chown $owner $tmp
 		chgrp $group $tmp
-		if diff -q $tmp $to >/dev/null 2>&1 && [ "$(stat --format '%u:%g:%A' $to)" = "$(stat --format '%u:%g:%A' $tmp)" ]; then
+		diff -q $tmp $to >/dev/null 2>&1 || diff="@content"
+		local md_to=$(__md "$to")
+		local md_tmp=$(__md "$tmp")
+		[ "$md_to" = "$md_tmp" ] || diff="$diff@metadata ($md_to -> $md_tmp)"
+		if [ -z "$diff" ]; then
 			log -c ", no changes."
 			rm $tmp
 			continue
@@ -344,7 +356,8 @@ cmd_compile_templates()
 			cp -p $to $bak
 		fi
 		mv $tmp $to
-		log -c ", done."
+		diff=${diff##@}
+		log -c ", updating ${diff//@/ + }, done."
 	done <<< $(cmd_list_templates "$@")
 
 	if [ "$missing_table" != 0 ]; then