Script to automatic download, install and configure the language pack on Firefox [Ubuntu/Debian distros]

firefox-language-installer.sh

#!/bin/bash
# Author: Maxwel Leite
# file-name: firefox-language-installer.sh
# Website: http://needforbits.wordpress.com/
# Description: Script to automatic download, install and configure the language pack on Firefox [Ubuntu/Debian distros]
# Dependencies: firefox-mozilla-build (Ubuntuzilla Repository) or firefox (obvious!) and wget
# Tested: Ubuntu 14.04 (Trusty), 13,10 (Saucy)
# License: GPLv3
# Note: Also works with Firefox installed from compressed tarball (ex: firefox-33.1.1.tar.bz2)
# TODO: Test in Debian

if [[ $EUID -eq 0 ]]; then
  echo -e "\nError!\n\nPlease, don't try to install as root user!\n\nUse only as normal user:\n\n./${0##*/}\n\nOr simply:\n\nbash ${0##*/}\n"
  exit
fi

if ! which wget >/dev/null; then
  echo "Error: **wget** is required to download the file"
  echo "Run the following command to install it:"
  echo "sudo apt-get install wget"
  exit
fi

if ! which firefox >/dev/null; then
  echo "Error: firefox is very... very required ;-P"
  echo "Run the following command to install it:"
  echo "sudo apt-get install firefox"
  exit
fi

# get the current Firefox version
ffver=`/usr/bin/firefox -v | awk '{ print $3 }'`
clear
echo ''

# get prefs.js location
prefsjs="$HOME/.mozilla/firefox/$(cat ~/.mozilla/firefox/profiles.ini|grep Path|sed s/Path=//)/prefs.js"

# get the system language code from environment
langid=$(echo $LANG | cut -d. -f1 | sed 's/\_/\-/g')

# get architecture of OS
case `uname -i` in
  i386|i486|i586|i686) arch='linux-i686';;
  x86_64) arch='linux-x86_64';;
esac

# building the url for download the XPI package
urlxpi="http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/$ffver/$arch/xpi/$langid.xpi"

echo 'Firefox Language Installer'
echo ''
echo 'Detected info:'
echo ''
echo "Firefox version: $ffver"
echo "OS Architecture: `uname -i`"
echo "OS Language ID: $langid"
echo ''

if [ -n "$1" ]; then
  langid=$1
  echo -e "Forced Language ID: $langid\n"
fi

# Check if Firefox is running
printf ":: Checking if Firefox is running... "
if `pidof firefox >/dev/null`; then
  printf 'Error!\n\n'
  echo "Please close the Firefox before do this."
  echo 'Try again after close it.'
  echo ''
  exit
else
  printf "Done!\n"
fi

printf ":: Checking available for '$langid' language pack... "
httpstatus=`wget --spider -S "$urlxpi" 2>&1 | grep "HTTP/" | awk '{print $2}'`
case $httpstatus in
  404)
    printf "Error!\n\n"
    echo "Looks like that's not yet any language pack for ''$langid''!"
    echo ''
    echo "Try install manually, example:"
    echo "./${0##*/} pt-BR"
    echo ''
    echo "Note: ''pt-BR'' is the language id for Portuguese (Brazilian)"
    echo ''
    echo "See the list of available language packs codes from here:"
    echo ''
    echo "http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/$ffver/$arch/xpi/"
    echo ''
    exit
  ;;
  200)
    printf "Done!\n"
  ;;
  *)
    printf "Error!\n\n"
    echo "Download Error!? Please try again!"
    exit
  ;;
esac

printf ":: Downloading the language pack add-on file... "
if wget -q -O /tmp/firefox-lang.xpi -q "$urlxpi" > /dev/null; then
  printf "Done!\n"
else
  printf "Error!\n\n"
  echo "Download Error! Please try again!"
fi

# Checking again if Firefox is running - just in case ;-)
if `pidof firefox >/dev/null`; then
  echo -e "\nError!\n"
  echo "Please close the Firefox before do this."
  echo 'Try again after close it.'
  echo ''
  exit
fi

printf ":: Setting default Locale in Firefox... "
if ! grep general.useragent.locale $prefsjs > /dev/null; then
  printf "Done!\n"
  echo 'user_pref("general.useragent.locale", "'$langid'");' | tee -a $prefsjs > /dev/null
else
  printf "Done!\n"
  sed -i 's|\("general.useragent.locale",\) "\(.*\)"|\1 "'$langid'"|' $prefsjs
fi

echo ":: Installing language pack in Firefox... "
echo -e "\n\nNow will be open Firefox and is needed to confirm the install of the language pack.\n\n**You must need press \"Install Now\" when asked and then close the Firefox**.\n"
read -p "Press [Enter] key to continue..."
/usr/bin/firefox /tmp/firefox-lang.xpi &
## Wait to finish the firefox instance.
while `pidof firefox >/dev/null`;
do
    sleep 1
done

#cleanup
clear
echo ''
printf ":: Cleanup... "
rm -rf /tmp/firefox-lang.xpi
sleep 1
printf "Done!\n\n"
printf "That's it!\nNow just reopen the Firefox and enjoy!\n\n"