Bing Desktop for Ubuntu

#!/bin/bash

 # $bing is needed to form the fully qualified URL for
 # the Bing pic of the day
 bing="www.bing.com"

 # $xmlURL is needed to get the xml data from which
 # the relative URL for the Bing pic of the day is extracted
 # The idx parameter determines where to start from. 0 is the current day,
 # 1 the previous day, etc.
 xmlURL="http://www.bing.com/HPImageArchive.aspx?format=xml&idx=0&n=1&mkt=en-US"

 # $saveDir is used to set the location where Bing pics of the day
 # are stored. $HOME holds the path of the current user's home directory
 saveDir=$HOME'/'

 # Create saveDir if it does not already exist
 mkdir -p $saveDir

 # Set picture options
 # Valid options are: none,wallpaper,centered,scaled,stretched,zoom,span ned
 picOpts="zoom"

 # The desired Bing picture resolution to download
 # Valid options: "_1024x768" "_1280x720" "_1366x768" "_1920x1200"
 picRes="_1920x1200"

 # The file extension for the Bing pic
 picExt=".jpg"

 # Extract the relative URL of the Bing pic of the day from
 # the XML data retrieved from xmlURL, form the fully qualified
 # URL for the pic of the day, and store it in $picURL
 picURL=$bing$(echo $(curl -s $xmlURL) | grep -oP "<urlBase>(.*)</urlBase>" | cut -d ">" -f 2 | cut -d "<" -f 1)$picRes$picExt

 # Temporary Name
 tempName="temp.jpg"

 # Download the Bing pic of the day
 curl -s -o $saveDir$tempName $picURL

 # Get the description from the EXIF of the image
 annotation=$(exiftool -s -s -s -Title "$saveDir$tempName")

 # Final Name given by Bing
 picName=${picURL##*/}

 # Write the EXIF into the Wallpaper
 convert $saveDir$tempName  -fill white  -undercolor '#00000080' -font Ubuntu-Regular -pointsize 24 -gravity Southeast -annotate +0+5 " $annotation " $saveDir$picName

 # Remove Temp
 rm $saveDir$tempName

 # Set the GNOME3 wallpaper
 DISPLAY=:0 GSETTINGS_BACKEND=dconf gsettings set org.gnome.desktop.background picture-uri '"file://'$saveDir$picName'"'

 # Set the GNOME 3 wallpaper picture options
 DISPLAY=:0 GSETTINGS_BACKEND=dconf gsettings set org.gnome.desktop.background picture-options $picOpts

 # Remove pictures older than 7 days
 # find $saveDir -atime 7 -delete

 # Exit the script
 exit