+list_contains() {
+ local var="$1"
+ local str="$2"
+ local val
+
+ eval "val=\" \${$var} \""
+ [ "${val%% $str *}" != "$val" ]
+}
+
+list_remove() {
+ local var="$1"
+ local remove="$2"
+ local val
+
+ eval "val=\" \${$var} \""
+ val1="${val%% $remove *}"
+ [ "$val1" = "$val" ] && return
+ val2="${val##* $remove }"
+ [ "$val2" = "$val" ] && return
+ val="${val1## } ${val2%% }"
+ val="${val%% }"
+ eval "export ${NO_EXPORT:+-n} -- \"$var=\$val\""
+}
+