fury

#!/bin/bash
#
# This is the Fury launcher script, which will download and run Fury in "standalone" mode. You can
# distribute this file in a Git repository to make it easier for users to run Fury.
#
# Copyright 2018-20 Jon Pretty, Propensive OÜ.
#

version="0.31.0"
ipfsHash="QmVczF1vhtMhJZn4nz1gmbWxgtd3gMPRgDkzVidkrRXw7h"
md5Hash="85cf06e3c0ca1833aa7f5adb4e08440b"
jdkVersion="11"
xdgUsrHome="${XDG_DATA_HOME:-"$HOME/.local/share"}"
xdgSysHome="${XDG_DATA_HOME:-/usr/share}"
xdgHome="$([ "$EUID" = "0" ] && echo "${xdgSysHome}" || echo "${xdgUsrHome}")"
furyDir="${xdgHome}/fury"
jdkDir="${furyDir}/jdk/${jdkVersion}"
furyUsr="${furyDir}/usr"
currentDir="${furyUsr}/current"
currentVersion="$(head -n1 "${currentDir}/.version" 2> /dev/null || echo "")"
downloadDir="${furyDir}/downloads"
downloadFile="${downloadDir}/fury-${version}.tar.gz"
ipfsGateway="https://gateway.pinata.cloud/ipfs"
downloadUrl="${ipfsGateway}/${ipfsHash}"
installDir="${furyUsr}/$([ "${currentVersion}" = "${version}" ] && echo "current" || echo "${version}")"
args="$@"
info="\033[1m\033[42m INFO \033[0m "


installFury() {
  checkJava && download && checkFile && extractTar
}

checkJava() {
  (command -v javac > /dev/null && javac -version > /dev/null) || [ -x "${jdkDir}"/**/java ] || installJava
}

installJava() {
  printf "${info}Installing a JDK..."
  
  case $(uname -s) in
    Darwin*) os="mac" ;;
    Linux*)  os="linux" ;;
    CYGWIN*) os="windows" ;;
    MINGW*)  os="windows" ;;
    MSYS*)   os="windows" ;;
    *)       fail os ;;
  esac
  
  case $(uname -m) in
    i386|i686|x86)                    arch="x32" ;;
    x86_64|x64)                       arch="x64" ;;
    aarch64_be|aarch64|armv8b|armv8l) arch="aarch64" ;;
    arm)                              arch="arm" ;;
    *)                                fail os ;;
  esac
  
  command -v curl > /dev/null || fail curl
  mkdir -p "${jdkDir}/tmp"
  curl -X GET -Ls "https://api.adoptopenjdk.net/v3/binary/latest/${jdkVersion}/ga/${os}/${arch}/jdk/hotspot/normal/adoptopenjdk?project=jdk" -H "accept: */*" | tar xz -C "${jdkDir}/tmp"
  
  case "${os}" in
    "linux")   mv "${jdkDir}/tmp"/*/* "${jdkDir}/" ;;
    "windows") mv "${kdkDir}/tmp"/*/* "${jdkDir}/" ;;
    "mac")     mv "${jdkDir}/tmp"/*/Contents/Home/* "${jdkDir}/" ;;
  esac

  rm -r "${jdkDir}/tmp"
  printf "done\n"
}

runFury() {
  printf "${info}Launching Fury ${version} in standalone mode...\n"
  if [[ -t 0 || ! -t 1 ]]; then
    FURY_HOME="${installDir}" "${installDir}/bin/fury" standalone ${args}
  else
    FURY_HOME="${installDir}" "${installDir}/bin/fury" standalone system install
  fi
}

download() {
  command -v curl > /dev/null || fail curl
  mkdir -p "${downloadDir}"
  printf "${info}Downloading Fury ${version}..."
  [ -f "${downloadFile}" ] || curl -Lso "${downloadFile}" "${downloadUrl}" || fail download
  printf "done\n"
}

checkFile() {
  command -v md5sum > /dev/null || command -v md5 > /dev/null || fail md5sum
  printf "${info}Checking MD5 checksum of ${downloadFile}..."
  calcHash=$( (md5sum "${downloadFile}" 2> /dev/null || md5 -r "${downloadFile}" 2> /dev/null) | head -c 32)
  [ "${md5Hash}" = "${calcHash}" ] || (rm -f "${downloadFile}" && fail checksum)
  printf "done\n"
}

extractTar() {
  printf "${info}Extracting Fury ${version} into ${installDir}..."
  command -v tar > /dev/null || fail tar
  mkdir -p "${installDir}" && tar xf "${downloadFile}" -C "${installDir}" || fail extract
  printf "done\n"
}

fail() {
  printf "fail\n\033[1m\033[41m FAIL \033[0m \033[1m"
  case "$1" in
    curl)     printf "Could not find \033[0;36mcurl\033[0m, which is required to download Fury." ;;
    download) printf "Could not download Fury version ${version}." ;;
    tar)      printf "Could not find \033[0;36mtar\033[0m to extract Fury." ;;
    extract)  printf "An unexpected error occurred while attempting to extract Fury." ;;
    md5sum)   printf "Could not find \033[0;36mmd5sum\033[0m, which is necessary to check the integrity of the downloaded file." ;;
    checksum) printf "The downloaded file fails the MD5 checksum test." ;;
    os)       printf "A JDK could not be found, and the operating system type could not be identified to install one." ;;
  esac
  printf "\033[0m\n"
  exit 1
}

([ -d "${installDir}" ] || [ "${currentVersion}" = "${version}" ] || installFury) && runFury