Create or re-attach a tmux session for a given project path (and enter python venv and create additional tmux windows)

create_tmux_session.sh

#!/bin/sh

# first argument: path to base directory
if [ -n "$1" ]; then
	BASE_PATH="$1"
	SESSION_NAME="$BASE_PATH"
else
	echo "Required argument BASE_PATH missing."
	exit 1
fi

cd "$BASE_PATH" || exit 1

# re-attach existing session or create new session
if tmux has-session -t "$SESSION_NAME"; then
	tmux attach-session -d -t "$SESSION_NAME"
else

	# try to find and activate virtual python environment
	VENV="$(find . -name venv -type d)"
	if [ -z "$VENV" ]; then
		# try to find todo directory and open files
		TODO="$(find .. -name todo -type d)"
		if [ -z "$TODO" ]; then
			tmux new-session -d -s "$SESSION_NAME" -n vim \
				'nvim; zsh'
		else
			tmux new-session -d -s "$SESSION_NAME" -n vim \
				"nvim \"$TODO\"/*; zsh"
		fi
	else
		tmux new-session -d -s "$SESSION_NAME" -n vim \
			"source \"$VENV/bin/activate\" && nvim; zsh"
	fi
	# second argument: do a horizontal split
	if [ -n "$2" ] && [ "$2" = "split" ]; then
		tmux split-window -d -h
	fi
	tmux new-window -d
	tmux attach-session -t "$SESSION_NAME"

fi