chg: dev: trap should not be set up if only sourcing the file.

bin/compose

@@ -117,7 +117,6 @@ clean_cache() {
 }
 
 
-trap_add "EXIT" clean_cache
 
 usage="$exname SERVICE"'
 
@@ -2623,8 +2622,13 @@ cached_wget() {
 }
 export -f cached_wget
 
+
 [ "$SOURCED" ] && return 0
 
+
+trap_add "EXIT" clean_cache
+
+
 # if [[ "$UID" != 0 ]]; then
 #     die "'$exname' requires root permissions (for now). Please run as root."
 # fi