#!/bin/bash

set -xeu

echo $CARGO_TARGET_DIR;
mkdir -p $CARGO_TARGET_DIR;
echo "Current Rust nightly version:";
rustc +nightly --version;
echo "Cached Rust nightly version:";
if [ ! -f $CARGO_TARGET_DIR/check_nightly_rust ]; then
  echo "" > $CARGO_TARGET_DIR/check_nightly_rust;
fi
cat $CARGO_TARGET_DIR/check_nightly_rust;
if [[ $(cat $CARGO_TARGET_DIR/check_nightly_rust) == $(rustc +nightly --version) ]]; then
  echo "The Rust nightly version has not changed";
else
  echo "The Rust nightly version has changed. Clearing the cache";
  rm -rf $CARGO_TARGET_DIR/*;
fi