Fish function for development with axiomatic

ax.fish

function ax
    if not set -q PROJECT
        set PROJECT (basename $VIRTUAL_ENV)
    end
    set -l SOURCEDIR {$HOME}/code/{$PROJECT}
    if test -z "$PROJECT" -o ! -d "$SOURCEDIR"
        echo "Unable to locate project; do you have a virtualenv activated?"
        return 1
    end
    set -l BRANCH (hg --repository $SOURCEDIR branch)

    set -l BASE {$HOME}/deployment/{$PROJECT}
    set -l DEFAULT_STORE {$BASE}/default.axiom
    if test $status -ne 0
        return $status
    end
    set -l BRANCH_STORE {$BASE}/{$BRANCH}.axiom
    if test ! -d "$BRANCH_STORE"
        if test -e "$BRANCH_STORE"
            echo "Refusing to overwrite non-directory {$BRANCH_STORE}."
            return 1
        end
        command cp --recursive $DEFAULT_STORE $BRANCH_STORE
        if test $status -ne 0
            return $status
        end
    end
    command axiomatic -d $BRANCH_STORE $argv
end