function fishtools-startswith
    set len1 (string length $argv[1])
    set len2 (string length $argv[2])
    if test $len1 -lt $len2
        set tmp (string sub -l $len1 $argv[2])
        if test $tmp = $argv[1]
            return 0
        end
    else
        set tmp (string sub -l $len2 $argv[1])
        if test $tmp = $argv[2]
            return 0
        end
    end
    return 1
end

function fishtools-in-list
    if test (count $argv) -ge 2
        for i in $argv[2..-1]
            if test "$i" = "$argv[1]"
                return 0
            end
        end
    end
    return 1
end

function fishtools-enable-rust
    if test -e $HOME/.cargo/bin
        set real (realpath $HOME/.cargo/bin)

        if not fishtools in $real $PATH
            set -gx PATH $real $PATH
        end
    end
end

function fishtools-enable
    for i in $argv
        switch $i
            case rust
                fishtools-enable-rust
            case '*'
                echo "unsupported " $argv[1]
        end
    end
end

function fishtools
    switch $argv[1]
        case startswith
            fishtools-startswith $argv[2..-1]
        case in
            fishtools-in-list $argv[2..-1]
        case enable
            fishtools-enable $argv[2..-1]
        case '*'
            echo "unknown sub-command:" $argv
            return 1
    end
end

function bls
    byobu list-session
end

function bat
    byobu attach-session -t $argv[1]
end

function bnew
    byobu new-session -t $argv[1]
end