* etc/profile.d/Z97-byobu.sh, usr/bin/byobu-launcher: LP: #897711

- allow nesting, if LC_BYOBU > 1

debian/changelog

@@ -24,6 +24,8 @@ byobu (5.3) unreleased; urgency=low
       rather than one or the other
   * etc/profile.d/Z97-byobu.sh:
     - support LC_TERMTYPE=[byobu|byobu-screen|byobu-tmux]
+  * etc/profile.d/Z97-byobu.sh, usr/bin/byobu-launcher: LP: #897711
+    - allow nesting, if LC_BYOBU > 1
 
   [ Dustin Kirkland and Ryan Thompson ]
   * usr/bin/byobu-reconnect-sockets, usr/bin/byobu-select-session: LP: #908944

etc/profile.d/Z97-byobu.sh

@@ -20,7 +20,7 @@
 # Apologies for borrowing the LC_BYOBU namespace, but:
 #  a) it's reasonable to assume that no one else is using LC_BYOBU
 #  b) LC_* is sent and receieved by most /etc/ssh/ssh*_config
-if [ "$LC_BYOBU" = "1" ] && [ -r "/usr/bin/byobu-launch" ]; then
+if [ -n "$LC_BYOBU" ] && [ "$LC_BYOBU" -gt 0 ] && [ -r "/usr/bin/byobu-launch" ]; then
 	. /usr/bin/byobu-launch
 elif [ "$LC_TERMTYPE" = "byobu" ] && [ -r "/usr/bin/byobu-launch" ]; then
 	. /usr/bin/byobu-launch

usr/bin/byobu-launcher

@@ -29,9 +29,13 @@ if [ -O "$HOME" ]; then
 	else
 		case "$TERM" in
 			*screen*)
-				# Handle nesting (silence this message, as some users found it noisy?)
-				# printf "$(gettext 'To launch in a nested session, run: byobu')\n"
-				true
+				# Handle nesting
+				if [ -n "$LC_BYOBU" ] && [ "$LC_BYOBU" -gt 1 ]; then
+					# LC_BYOBU > 1, so user explicitly wants nested sessions
+					exec $BYOBU_PREFIX/bin/byobu "$@"
+				else
+					true
+				fi
 			;;
 			dumb)
 				# Dumb terminal, don't launch