Check versions and update JDK

update_liberica_jdk.command

#!/bin/bash

# Compare installed JDK versions with Liberica API, with options to download.

readonly END=
readonly BOLD=
readonly RED=
readonly GREEN=
readonly YELLOW=

warn() { echo "$YELLOW$*$END"; } >&2
die() { echo; echo "$RED$*$END"; echo; exit 1; } >&2

if [[ "$(uname)" != "Darwin" ]]; then die "${RED}Unsupported OS.$END"; fi
if ! command -v jq &> /dev/null; then die "${RED}jq is not installed.$END"; fi

if [[ "$(uname -m)" == "arm"* ]]; then
  arch="arm"
else
  arch="x86"
fi

found="false"
for jvm in "/Library/Java/JavaVirtualMachines"/*; do
  found="true"
  echo
  filename="$(basename -- "$jvm")"
  echo "$BOLD$filename$END"

  # get current version
  feature_version="${filename#*liberica-jdk-}" # remove prefix
  feature_version="${feature_version%-*}" # remove suffix dash
  feature_version="${feature_version%.*}" # remove suffix dot
  version="$("$jvm/Contents/Home/bin/java" -version 2>&1)"
  version="$(echo "$version" |  head -n 2)" # take 2nd line
  version="${version#*(}" # remove prefix
  version="${version#*build }"
  version="${version%)*}" # remove suffix
  version="${version%-LTS*}"
  echo "Version: $version"

  # check bundle type
  if [[ "$filename" == *"full"* ]]; then
    bundle_type="jdk-full"
    echo "Type: Full"
  elif [[ "$filename" == *"lite"* ]]; then
    bundle_type="jdk-lite"
    echo "Type: Lite"
  else
    bundle_type="jdk"
    echo "Type: Standard"
  fi

  # pull API
  api="$(curl "https://api.bell-sw.com/v1/liberica/releases?version-feature=$feature_version&version-modifier=latest&bitness=64&os=macos&arch=$arch&package-type=dmg&bundle-type=$bundle_type" -s)"
  api_version="$(echo "$api" | jq ".[0].version" | tr -d '"')"
  api_download_url="$(echo "$api" | jq ".[0].downloadUrl" | tr -d '"')"
  api_filename="$(echo "$api" | jq ".[0].filename" | tr -d '"')"

  if [[ "$version" == "$api_version" ]]; then
    echo "${GREEN}No update available$END"
  else
    echo "Latest version $YELLOW$api_version$END is available, download? [Y/N]"
    read input

    # ask to download
    case "$input" in
      Y | y)
        echo -n "Downloading..."
        curl -s -L "$api_download_url" -o "$api_filename"
        echo " Done."
        ;;
      N | n) ;;
      *) die "Unable to recognize input." ;;
    esac
  fi
done

if [[ "$found" = false ]]; then
  echo "${RED}Not found.$END"
fi

echo
echo "Goodbye!"