From 1d3a4b8cf936e0fc48c96bd3ae415b4a84fb17a2 Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Fri, 25 Aug 2017 08:24:02 -0300
Subject: Support tmux and screen as fallback on root and remotes

---
 shell | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/shell b/shell
index 31d2823..90e3278 100755
--- a/shell
+++ b/shell
@@ -13,7 +13,6 @@ DEST="$1"
 COMMAND="$2"
 #LOCAL_MULTIPLEXER="wscreen"
 LOCAL_MULTIPLEXER="wtmux"
-REMOTE_MULTIPLEXER="screen -x"
 MONITORING="-M $(($RANDOM + 1024))"
 AUTOSSH="autossh $MONITORING"
 
@@ -39,6 +38,17 @@ function shell_wtmux_ls {
   tmux ls | grep -q ^$1:
 }
 
+# Try tmux, then screen
+function shell_remote_multiplexer {
+  tmux="tmux attach"
+
+  if [ ! -z "$1" ]; then
+    tmux="$tmux -t $1"
+  fi
+
+  echo "$SUDO $tmux || $SUDO screen -x $1"
+}
+
 # Syntax check
 if [ -z "$DEST" ]; then
   exit 1
@@ -51,9 +61,10 @@ window_title $DEST
 if [ "$BASENAME" == "shells" ]; then
   # Remote screen shell using $AUTOSSH
   if [ "$COMMAND" == "root" ]; then
-    $AUTOSSH $DEST -t -- sudo $REMOTE_MULTIPLEXER
+    SUDO="sudo"
+    $AUTOSSH $DEST -t -- "`shell_remote_multiplexer`"
   else
-    $AUTOSSH $DEST -t -- $REMOTE_MULTIPLEXER $COMMAND
+    $AUTOSSH $DEST -t -- "`shell_remote_multiplexer` $COMMAND"
   fi
 else
   if [ -z "$COMMAND" ] && shell_${LOCAL_MULTIPLEXER}_ls $DEST; then
@@ -62,7 +73,8 @@ else
   elif [ -z "$COMMAND" ] && [ "$DEST" == "root" ]; then
     # Local root shell
     window_title root
-    sudo $REMOTE_MULTIPLEXER
+    SUDO="sudo"
+    eval `shell_remote_multiplexer`
   elif [ -z "$COMMAND" ] && [ -f "$HOME/.screen/$DEST" ]; then
     # Local root shell
     window_title $DEST
-- 
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