get_latest_ghostscript.sh

#!/bin/bash
# This will get the latest ghostscript linux 64bit release.
# Requires jq and wget

# Get a new copy of the github latest release if the mtime is older than 1 day.
if [[ ! -f ghostpdl-downloads.js || $(find "ghostpdl-downloads.js" -mtime +1 -print) ]]
then
  echo "Getting the latest ghostscript release from github."
  rm -f ghostpdl-downloads.js
  wget -O ghostpdl-downloads.js https://api.github.com/repos/ArtifexSoftware/ghostpdl-downloads/releases/latest -q
  # Set mtime to now.
  touch ghostpdl-downloads.js
fi

# Get the ghostscript url.
NEW_NAME=$( cat ghostpdl-downloads.js | jq '.assets[].name' | grep 'ghostscript' | grep 'linux-x86_64.tgz' | tr -d '"' )
URL=$( cat ghostpdl-downloads.js | jq ".assets[] | select(.name == \"${NEW_NAME}\") | .browser_download_url" | tr -d '"' )
FILENAME=$( basename "${URL}" )
if [[ ! -f "${FILENAME}" ]]
then
  echo "downloading ${URL}"
  wget "${URL}" -q
fi

echo "extracting ${FILENAME}."
EXEC_FILE=$( tar -ztvf "${FILENAME}" | grep "^\-..x" | awk '{print $6}' )
FILENAME=$( tar zxvf "${FILENAME}" "${EXEC_FILE}" )
CURRENT_DIR=$( pwd )
mv "${FILENAME}" "${CURRENT_DIR}/gs"

echo "cleaning up unneeded files."
FOLDER=$( dirname "${FILENAME}" )
rm -rf "${FOLDER}"

echo "running ldd ${CURRENT_DIR}/gs."
ldd "${CURRENT_DIR}/gs"

echo "running ${CURRENT_DIR}/gs."
${CURRENT_DIR}/gs