dotfiles/.local/bin/samedir

#!/bin/sh

# Open a terminal window in the same directory as the currently active window.
#
PIDlist=$(pstree -lpATna "$(xdotool getactivewindow getwindowpid)" | sed -En 's/.*,([0-9]+).*/\1/p' | tac)
for PID in $PIDlist; do
    [ -d "/proc/$PID" ] || continue
	cmdline=$(ps -o args= -p "$PID")
	process_group_leader=$(ps -o comm= -p "$(ps -o pgid= -p "$PID" | tr -d ' ')")
	cwd=$(readlink "/proc/$PID/cwd")
	# zsh and lf won't be ignored even if it shows ~ or /
	case "$cmdline" in
		'lf -server') continue ;;
		"${SHELL##*/}"|'lf'|'lf '*) break ;;
	esac
	# git (and its sub-processes) will show the root of a repository instead of the actual cwd, so they're ignored
	[ "$process_group_leader" = 'git' ] || [ ! -d "$cwd" ] && continue
	# This is to ignore programs that show ~ or / instead of the actual working directory
	[ "$cwd" != "$HOME" ] && [ "$cwd" != '/' ] && break
done

[ "$PWD" != "$cwd" ] && [ -d "$cwd" ] && { cd "$cwd" || exit 1; }
[ "$(ps -p $$ -ocomm=)" = "zsh" ] && eval '$TERMINAL &!' || "$TERMINAL" &