check-available-updates-for-extensions-of-inox-web-browser.sh

#!/bin/sh

# Check available updates for extensions of Inox web browser.

show_usage ()
{
  local name=`basename "$0"`

  cat << EOF
Usage: $name [OPTIONS] -c CHROME_WEB_STORE_ITEM_PROPERTY_CLI

Description:
  Check available updates for extensions of Inox.

  -i
      Assign the home of inoxunpack.
      \$HOME/.inoxunpack is default.
  -c
      Assign the chrome-web-store-item-property-cli.  
  -h
      Show usage.
EOF
}


inoxunpack="$HOME/.inoxunpack"
cwsipc=""

while getopts ":i:c:" option; do
  case "$option" in
    i)
      inoxunpack="$OPTARG"
      ;;
    c)
      cwsipc="$OPTARG"
      ;;
    *)
      show_usage
      exit 1
      ;;
  esac
done

if [ -z "$cwsipc" ]; then
  echo "Error: The chrome-web-store-item-property-cli is not specified." >&2
  echo ""
  show_usage

  exit 1
fi

updates=""

for ext in `ls -d $inoxunpack/* 2>/dev/null`; do
  ver_cur=`cat "$ext/manifest.json" 2>/dev/null | jq ".version"`
  if [ "null" == "$ver_cur" ]; then
    continue
  fi

  id=`basename "$ext"`

  prop=`"$cwsipc" "$id" 2>/dev/null`
  if [ 0 -ne "$?" ]; then
    continue
  fi
  
  ver_new=`echo "$prop" | jq ".version"`
  if [ "$ver_cur" != "$ver_new" ]; then
    name=`echo "$prop" | jq ".name"`
    if [ "null" != "$name" ]; then
      if [ -z "$updates" ]; then
        updates="$name"
      else
        updates="$updates\n$name"
      fi
    fi
  fi
done

if [ ! -z "$updates" ]
then
  notify-send "Inox extension update available" "$updates"
fi