fish 复用 .bash_profile 里的环境变量

vim ~/.config/fish/config.fish

添加以下代码

# REUSE ENVIRONMENT VARIABLES FROM ~/.bash_profile
bash -c '. ~/.bash_profile; env' | while read e
    set var (echo $e | sed -E "s/([a-zA-Z0-9_]+)=(.*)\$/\1/")
    set value (echo $e | sed -E "s/([a-zA-Z0-9_]+)=(.*)\$/\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)

    #echo "set -xg '$var' '$value' (via '$e')"

    switch $value
        case '`*`';
            # executable
            set NO_QUOTES (echo $value | sed -E "s/^\`(.*)\`\$/\1/")
            set -x $var (eval $NO_QUOTES)
        case '*'
            # default
            switch $var
                case 'PWD'
                case 'SHLVL'
                case '_'
                case '*'
                    eval set -xg $var $value
            end
        end
end