Terraform update script for fish shell

update-terraform.fish

function update-terraform --description 'Updates terraform to the latest version'
        set -l base 'https://releases.hashicorp.com/terraform'
        set -l ver (curl -s $base/ | grep '<a href="/terraform/' | head -n1 | cut -d'/' -f 3)
        set -l tmpdir (mktemp -d)
        wget -O $tmpdir/tf.zip $base/$ver/terraform_"$ver"_linux_amd64.zip
        unzip $tmpdir/tf.zip -d $tmpdir
        install $tmpdir/terraform (which terraform)
        terraform version
end