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-rw-r--r--sh/shrc.d/tmux.sh9
1 files changed, 9 insertions, 0 deletions
diff --git a/sh/shrc.d/tmux.sh b/sh/shrc.d/tmux.sh
index bd954be8..32780c9d 100644
--- a/sh/shrc.d/tmux.sh
+++ b/sh/shrc.d/tmux.sh
@@ -17,3 +17,12 @@ tmux() {
# Execute with concluded arguments
command tmux "$@"
}
+
+# If we have a SHLVL set from one of the shells that does that (bash, ksh93,
+# zsh), then set a SHLVL-derived value that takes tmux into account if we
+# haven't already. This can be used to show the current SHLVL in the prompt for
+# more advanced shells.
+if [ -n "$SHLVL" ] && [ -n "$TMUX" ] && [ -z "$TMUX_SHLVL" ] ; then
+ TMUX_SHLVL=$((SHLVL - 1))
+ export TMUX_SHLVL
+fi