y-bin-dependency-download

#!/bin/sh
[ -z "$DEBUGDEBUG" ] || set -x
set -e
YBIN="$(dirname $0)"

SHA256SUM="sha256sum"

[ -n "$bin_tar_path" ] || bin_tar_path=$bin_tgz_path
bin_tar_extract=$bin_tar_path
[ -n "$bin_tar_compression" ] || bin_tar_compression=z

platform="$(uname -s)"
case "$platform" in
  Darwin )
    url=$Darwin_url
    sha256=$Darwin_sha256
    SHA256SUM="shasum -a 256"
    ;;
  Linux )
    url=$Linux_url
    sha256=$Linux_sha256
    case "$bin_tar_path" in
      */*/*) ;;
      */*)
        set -o noglob
        bin_tar_extract="--wildcards */$(basename $bin_tar_path)"
        ;;
      *) ;;
    esac
    ;;
  * )
    echo "Unsupported platform $platform" && exit 1
    ;;
esac

[ ! -z "$bin_version" ] || bin_version=$sha256

bin_uniq=y-$bin_name-$bin_version-bin
bin_file=$YBIN/$bin_uniq
bin_link=$YBIN/$bin_name

[ -f $bin_file ] || {
  [ -z "$YSTACK_BIN_DOWNLOAD_CACHE" ] || bin_cache="$YSTACK_BIN_DOWNLOAD_CACHE/$bin_uniq"
  [ -z "$bin_cache" ] || [ ! -f "$bin_cache" ] || url="file://$bin_cache"
  echo "Missing $bin_name binary. Downloading a known version from $url ..." 1>&2
  case "$url" in
    *.tar.gz) ;;
    *.gz) bin_file=$bin_file.gz ;;
  esac
  curl -o $bin_file -L -f $url
  if ! echo "$sha256  $bin_file" | $SHA256SUM -c - 1>&2; then $SHA256SUM $bin_file && rm $bin_file && exit 1; fi
  if [ ! -z "$bin_tar_path" ]; then
    tmp=$(mktemp -d)
    (cd $tmp; tar -xv${bin_tar_compression}f $bin_file --strip-components=$(echo $bin_tar_path | awk -F'/' '{print NF-1}') $bin_tar_extract) \
      || (cd $tmp; tar -tv${bin_tar_compression}f $bin_file; exit 1)
    mv "$tmp/$(basename $bin_tar_path)" $bin_file
  fi
  if [ ! -z "$bin_zip_path" ]; then
    tmp=$(mktemp -d)
    (cd $tmp; unzip $bin_file)
    mv "$tmp/$bin_zip_path" $bin_file
  fi
  case "$url" in
    *.tar.gz) ;;
    *.gz) gunzip $bin_file && bin_file=$(echo $bin_file | sed 's/\.gz$//g') ;;
  esac
  [ -z "$bin_cache" ] || [ -f "$bin_cache" ] || cp -v $bin_file $bin_cache 1>&2
  chmod a+x $bin_file
}

if [ "$(readlink $bin_link)" != "$bin_file" ]; then
  [ -L $bin_link ] && rm $bin_link
  ln -s $bin_file $bin_link
fi