fixes and improvements

tmux/.is_vim.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Usage: is_vim.sh <tty>
+#   tty: Specify tty to check for vim process.
+tty=$1
+
+# Construct process tree.
+children=();
+pids=( $(ps -o pid= -t $tty) )
+
+while read -r pid ppid
+do
+  [[ -n pid && pid -ne ppid ]] && children[ppid]+=" $pid"
+done <<< "$(ps -Ao pid=,ppid=)"
+
+# Get all descendant pids of processes in $tty with BFS
+idx=0
+while (( ${#pids[@]} > idx ))
+do
+  pid=${pids[idx++]}
+  pids+=( ${children[pid]-} )
+done
+
+# Check whether any child pids are vim
+ps -o state=,comm= -p "${pids[@]}" | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'
+exit $?

tmux/.tmux.conf

@@ -29,8 +29,8 @@ set -g @tmux_window_name_shells "['bash', 'fish', 'sh', 'zsh']"
 set -g @tmux_window_dir_programs "['nvim', 'vim', 'vi', 'git']"
 set -g @tmux_window_name_use_tilde "True"
 set -g @tmux_window_name_max_name_len "100"
-set-option -g default-shell $SHELL
-set -g default-command "$SHELL -i"
+# set-option -g default-shell $SHELL
+# set -g default-command "$SHELL -i"
 
 # Other examples:
 # set -g @plugin 'github_username/plugin_name'
@@ -61,8 +61,12 @@ setw -g mode-keys vi
 # decide whether we're in a Vim process
 #is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
 #    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
+ is_vim="~/.is_vim.sh '#{pane_tty}'"
+# is_vim="children=(); i=0; pids=( $(ps -o pid=,tty= | grep -iE '#{s|/dev/||:pane_tty}' | awk '\{print $1\}') ); \
+# while read -r c p; do [[ -n c && c -ne p && p -ne 0 ]] && children[p]+=\" $\{c\}\"; done <<< \"$(ps -Ao pid=,ppid=)\"; \
+# while (( $\{#pids[@]\} > i )); do pid=$\{pids[i++]\}; pids+=( $\{children[pid]-\} ); done; \
+# ps -o state=,comm= -p \"$\{pids[@]\}\" | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
 
-is_vim="~/is_vim.sh '#{pane_tty}'"
 
 bind-key -n 'S-Left' if-shell "$is_vim" 'send-keys S-Left' 'select-pane -L'
 bind-key -n 'S-Down' if-shell "$is_vim" 'send-keys S-Down' 'select-pane -D'