Update remote_cwd.sh

tools/remote_cwd.sh

@@ -6,25 +6,64 @@
 #  Created by Matt Schrage on 1/7/21.
 #  Copyright © 2021 Matt Schrage. All rights reserved.
 
+
+# Notes:
+# This script either outputs "error" or it outputs the working directory of the user's remote shell
+# The script has some Fig Settings passed in. These are
+# * get_process_from_top -> if exists, get pid from the top of process list not bottom 
+
 # Do not delete the following comment:
 # FIG_SETTINGS
 
+
+# OLD WAY OF DOING IT
 # Heuristic for getting user's pid. Find all processes with a TTY and pick most recent.
-pid=$(ps -e -o pid,tty,comm | grep -v "?" | grep 'zsh\|bash\|fish' | tail -n -1 | xargs | cut -d ' ' -f 1);
-
-# https://stackoverflow.com/a/8597411/926887
-if [[ "$OSTYPE" == "linux-gnu"* ]]; then
-        readlink /proc/$pid/cwd
-elif [[ "$OSTYPE" == "darwin"* ]]; then
-        lsof -p $pid | grep cwd | awk '{print $9}'
-elif [[ "$OSTYPE" == "cygwin" ]]; then
-        pwd # not gonna handle this right now
-elif [[ "$OSTYPE" == "msys" ]]; then
-        pwd # not gonna handle this right now
-elif [[ "$OSTYPE" == "win32" ]]; then
-        pwd # not gonna handle this right now
-elif [[ "$OSTYPE" == "freebsd"* ]]; then
-        procstat -f $pid | grep cwd | awk '{print $10}'
-else
-    pwd # Unknown.
+# pid=$(ps -e -o pid,tty,comm | grep -v "?" | grep 'zsh\|bash\|fish' | tail -n -1 | xargs | cut -d ' ' -f 1);
+
+
+
+# Steps (comment out all the code blocks when ready)
+
+# 1. get the list of all processes
+shell_processes=$(ps -e -o pid,tty,comm | grep -v "?" | grep 'zsh\|bash\|fish')
+
+# 2. Work out how many TTYs there are on the remote machine
+# NOTE: Do NOT delete the double quotes around "$shell_processes". The passing is wrong if we do
+total_ttys=$(echo "$shell_processes" | awk '{print $2}' | sort | uniq | wc -l | awk '{print $1}')
+
+# 3. Check how many TTYs are connected
+# If more than 1, return some error code
+if (( $total_ttys > 1 ));
+then
+        echo "error" 
+
+# Otherwise, get the pid of the user's shell depending on the env variables / fig settings fig passed in
+else 
+        # If the user is using something like powerlevel10k or the train tracks prompt
+        if [[ ! -z "$get_process_from_top" ]]; 
+        then 
+                pid=$(echo "$shell_processes" | head -n 1 | xargs | cut -d ' ' -f 1);
+
+        # Otherwise get last process in list
+        else
+                pid=$(echo "$shell_processes" | tail -n -1 | xargs | cut -d ' ' -f 1);
+        fi
+
+
+        # https://stackoverflow.com/a/8597411/926887
+        if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+                readlink /proc/$pid/cwd
+        elif [[ "$OSTYPE" == "darwin"* ]]; then
+                lsof -p $pid | grep cwd | awk '{print $9}'
+        elif [[ "$OSTYPE" == "cygwin" ]]; then
+                pwd # not gonna handle this right now
+        elif [[ "$OSTYPE" == "msys" ]]; then
+                pwd # not gonna handle this right now
+        elif [[ "$OSTYPE" == "win32" ]]; then
+                pwd # not gonna handle this right now
+        elif [[ "$OSTYPE" == "freebsd"* ]]; then
+                procstat -f $pid | grep cwd | awk '{print $10}'
+        else
+            echo "error" # Unknown.
+        fi
 fi