tmux: add resurrect to save/restore pane/window layout

.config/tmux/plugins/resurrect/strategies/nvim_session.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# "nvim session strategy"
+#
+# Same as vim strategy, see file 'vim_session.sh'
+
+ORIGINAL_COMMAND="$1"
+DIRECTORY="$2"
+
+nvim_session_file_exists() {
+	[ -e "${DIRECTORY}/Session.vim" ]
+}
+
+original_command_contains_session_flag() {
+	[[ "$ORIGINAL_COMMAND" =~ "-S" ]]
+}
+
+main() {
+	if nvim_session_file_exists; then
+		echo "nvim -S"
+	elif original_command_contains_session_flag; then
+		# Session file does not exist, yet the original nvim command contains
+		# session flag `-S`. This will cause an error, so we're falling back to
+		# starting plain nvim.
+		echo "nvim"
+	else
+		echo "$ORIGINAL_COMMAND"
+	fi
+}
+main