Installs Spotify's (experimental) client on Ubuntu. If the package installation fails, adds the Spotify repo to the sources list, updates the apt-cache, and then tries to install the client again.

spotify-install.sh

# Installs Spotify client on Ubuntu.
# If installing the package fails, add the spotify repo to the sources list.

apt-get install spotify-client
if [[ $? -eq 0 ]]
then
    exit 0
fi


grep -q spotify /etc/apt/sources.list
if [[ $? -eq 0 ]]
then    # Spotify repo is in the repo list.
    apt-key -y adv --keyserver keyserver.ubuntu.com --recv-keys 94558F59
    # Fetch key just in case
    if [[ $? -ne 0 ]]
    then
        exit 1
    fi
else
    apt-key -y adv --keyserver keyserver.ubuntu.com --recv-keys 94558F59
    echo "deb http://repository.spotify.com stable non-free" >> /etc/apt/sources.list
fi

apt-get update && sudo apt-get -y install spotify-client
exit 0