Centralize option parsing for options that can be specified multiple times

Use common code for parsing environment for interesting options.
Cleaner, and fixes handling of variables with newlines included
in various places.

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/shlib.sh b/lib/shlib.sh
index c984039..34982b0 100644
--- a/lib/shlib.sh
+++ b/lib/shlib.sh
@@ -17,6 +17,20 @@ read_config() {
 	echo ${!vname}
 }
 
+find_option_values() {
+	local out=$1
+	local module=$2
+	local option=$3
+	local prefix=CFG_${module}__${option}
+
+	while IFS= read -r -d '' line; do
+		local name=${line%%=*}
+		local value=${line#*=}
+		[[ $name == $prefix || $name == ${prefix}_* ]] || continue
+		eval "$out+=('$value')"
+	done < <(env --null)
+}
+
 read_buildnr() {
 	local buildnr_path=$intermediatesdir/buildnr
 	if [[ -e $buildnr_path ]]; then