# Check to see if a command exists
function command_exists {
    command -v "$1" &> /dev/null
}

# Ask for admin password up front and keep sudo alive until the end of the script
function keep_alive {
    sudo -v
    while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &
}

# Extract a compressed file with the appropriate command
function unpack {
    if [ -f "$1" ]; then
        case $1 in
            *.tar.bz2)        tar xjf $1        ;;
            *.tar.gz)         tar xzf $1        ;;
            *.bz2)            bunzip2 $1        ;;
            *.rar)            unrar x $1        ;;
            *.gz)             gunzip $1         ;;
            *.tar)            tar xf $1         ;;
            *.tbz2)           tar xjf $1        ;;
            *.tgz)            tar xzf $1        ;;
            *.zip)            unzip $1          ;;
            *.Z)              uncompress $1     ;;
            *)                echo "'$1' cannot be extracted via extract()" ;;
        esac
    else
        echo "'$1' is not a valid file"
    fi
}

# Source library
for f in ~/.zsh/lib/*; do source "$f"; done

# vim:set ft=zsh: