Script to compile Sagepay XML/XSLT2 into HTML

sagepay.sh

#!/usr/bin/env bash
# Sagepay templates script file

# Function to show help with the use of this script
help()
{
  echo "compile   Compiles XML/XSLT to HTML"
  echo "bundle    Create bundle to send to Sagepay"
  echo "help      Show this help"
  echo ""
}

# Check wether saxon is available in the system
check_saxon()
{
  saxon -? &>/dev/null
  if [ $? -ne 0 ]
    then
      echo "Please install saxon first. Try:"
      echo "brew install saxon"
      echo "More info on http://www.saxonica.com/documentation/index.html"
      exit
  fi
}

clean()
{
  echo "Cleaning up ..."
  rm -rf ./HTML
  rm sagepay_bundle.tar.gz
}

# Files lists, they should be matching
xml_list=(
  'authorisation'
  'card_authentication'
  'card_details'
  'error'
)

xslt_list=(
  'authorisation_low'
  'card_authentication_low'
  'card_details_low'
  'error'
)

# Compile files into html
compile()
{
  n=0
  while [ "${xslt_list[n]}" != "" ]
  do
    echo "Compiling ${xml_list[n]} ..."
    saxon -s:XML/${xml_list[n]}.xml -xsl:XSLT/${xslt_list[n]}.xslt -o:HTML/${xml_list[n]}.html
    n=$[n + 1]
  done
}

# Bundle files into a compressed tar
bundle()
{
  echo "Bundling ..."
  tar czf sagepay_bundle.tar.gz images XSLT
  if [ $? -eq 0 ]
    then
    echo "Done. Look for sagepay_bundle.tar.gz"
  fi
}

# Create boilerplate page with all iframes
boilerplate()
{
  echo "Creating boilerplate ..."
  php boilerplate.php > HTML/index.html
  open HTML/index.html
}

# If no arguments are given
if [ $# -eq 0 ]
  then
    echo "You didn't supply any commands. Use as follows:"
    help
    exit
fi

# Case statement for argument 1, other arguments are ignored
case $1 in
  "compile" )   check_saxon
                clean
                compile
                boilerplate
                exit
                ;;
  "bundle" )    clean
                bundle
                exit
                ;;
  "help" )      help
                exit
                ;;
  * )           echo "You didn't supply a valid command. Use as follows:"
                help
                exit
                ;;
esac