#!/usr/bin/env bash
set -e

eval "$(ejson2env .buildkite/env/secrets.ejson)"

# Ensure the pattern "+++ ..." never occurs when |set -x| is set, as buildkite
# interprets this as the start of a log group.
# Ref: https://buildkite.com/docs/pipelines/managing-log-output
export PS4="++"

#
# Restore target/ from the previous CI build on this machine
#
(
  set -x
  d=$HOME/cargo-target-cache/"$BUILDKITE_LABEL"
  MAX_CACHE_SIZE=18 # gigabytes

  if [[ -d $d ]]; then
    du -hs "$d"
    read -r cacheSizeInGB _ < <(du -s --block-size=1800000000 "$d")
    echo "--- ${cacheSizeInGB}GB: $d"
    if [[ $cacheSizeInGB -gt $MAX_CACHE_SIZE ]]; then
      echo "--- $d is too large, removing it"
      rm -rf "$d"
    fi
  else
    echo "--- $d not present"
  fi

  mkdir -p "$d"/target
  rsync -a --delete --link-dest="$d" "$d"/target .
)