#! /usr/bin/env bash
set -euo pipefail

if ! version=$(grep -m 1 -oP '^\s*channel\s*=\s*"?\K([\d\.]+)' rust-toolchain.toml)
then
  echo "fatal: no rust version found via rust-toolchain.toml" >&2
  exit 1
else
  echo "$version"
fi

