zsh/rc: Add option to use tmux instead of screen.

Can be configured in zsh/rc.local.

diff --git a/zsh/rc b/zsh/rc
index 733921fe0c6e6affa59b7e7b384c9e1115ce2605..a1acba570b2a2686aa85a9538af9d9600478e82c 100644 (file)
--- a/zsh/rc
+++ b/zsh/rc
@@ -699,26 +699,47 @@ fi
 
 # LOAD ADDITIONAL CONFIGURATION FILES
 
+# Configuration option for rc.local to use tmux. By default screen is used.
+use_tmux=
+
 source_config ~/.zsh/rc.local
 
 
 # RUN COMMANDS
 
-# If not already in screen reattach to a running session or create a new one.
-# This also starts screen on a remote server when connecting through ssh.
-if [[ $TERM != dumb && $TERM != linux && -z $STY ]]; then
+# If not already in screen or tmux, reattach to a running session or create a
+# new one. This also starts screen/tmux on a remote server when connecting
+# through ssh.
+if [[ $TERM != dumb && $TERM != linux && -z $STY && -z $TMUX ]]; then
     # Get running detached sessions.
+    if [[ -z $use_tmux ]]; then
     session=$(screen -list | grep 'Detached' | awk '{ print $1; exit }')
+    else
+        session=$(tmux list-sessions 2>/dev/null \
+                  | sed '/(attached)$/ d; s/^\([0-9]\{1,\}\).*$/\1/; q')
+    fi
 
     # As we exec later we have to set the title here.
+    if [[ -z $use_tmux ]]; then
     window_preexec "screen"
+    else
+        window_preexec "tmux"
+    fi
 
     # Create a new session if none is running.
     if [[ -z $session ]]; then
+        if [[ -z $use_tmux ]]; then
         exec screen
+        else
+            exec tmux
+        fi
     # Reattach to a running session.
     else
+        if [[ -z $use_tmux ]]; then
         exec screen -r $session
+        else
+            exec tmux attach-session -t $session
+        fi
     fi
 fi
 
@@ -730,7 +751,7 @@ fi
 # cases it doesn't work, the E alias can be used as workaround.
 #
 # Moved in the "run commands" section to prevent one unnecessary zsh process
-# when starting screen (see above).
+# when starting screen/tmux (see above).
 exec 2>>(while read -r -k -u 0 line; do
     printf '\e[91m%s\e[0m' "$line";
     print -n $'\0';