Fish shell port of za

za.fish

function za
## Fish shell port of za https://gist.github.com/chanux/1119556
## What The Fish? : http://wp.me/p1rVu-bO
##
## To use za as a Fish function, just copy paste the script and enter
##  Then run func_save za
## Now you can use za on your Fish <"><

    if [ -z $argv[1] ]
        set za_mark 1
    else
        set za_mark $argv[1]
    end

    set za_dir $PWD

    # When in home, do nothing
    [ $za_dir = $HOME ]; and return    

    while [ $za_mark -gt 0 -a $za_dir != $HOME ]
        set za_dir (dirname $za_dir)
        set za_mark (math $za_mark - 1)
    end

    cd $za_dir
end