#!/bin/sh set_rust_to_1680() { if rustup toolchain list | grep -q "1.68.0"; then rustup default 1.68.0 else echo "Rust version 1.68.0 is not installed. Please install it using 'rustup install 1.68.0'." >&2 exit 1 fi } set_rust_to_1720() { if rustup toolchain list | grep -q "1.72.0"; then rustup default 1.72.0 else echo "Rust version 1.72.0 is not installed. Please install it using 'rustup install 1.72.0'." >&2 exit 1 fi }