shell - re-use '~/.profile` for Fish?

(I'm talking about the shell Fish, esp. Fish's Fish.)

For Bash/ZSH, I had ~/.profile with some exports, aliases and other stuff.

I don't want to have a separate config for environment variables for Fish, I want to re-use my ~/.profile. How?

In The FAQ, it is stated that I can at least import those via /usr/local/share/fish/tools/import_bash_settings.py, however I don't really like running that for each Fish-instance.

Answer

My current solution (see here for a maybe more recent version):

egrep "^export " ~/.profile | while read e
    set var (echo $e | sed -E "s/^export ([A-Z_]+)=(.*)\$/\1/")
    set value (echo $e | sed -E "s/^export ([A-Z_]+)=(.*)\$/\2/")

    # remove surrounding quotes if existing
    set value (echo $value | sed -E "s/^\"(.*)\"\$/\1/")

    if test $var = "PATH"
        # replace ":" by spaces. this is how PATH looks for Fish
        set value (echo $value | sed -E "s/:/ /g")

        # use eval because we need to expand the value
        eval set -xg $var $value

        continue
    end

    # evaluate variables. we can use eval because we most likely just used "$var"
    set value (eval echo $value)

    set -xg $var $value
end