diffs to replace multiple diff alias/abbr

diffs

function diffs -d "all kinds of diff features"
    set -l options 'f' 'w' 'l' 'L' 'W' 'h'
    argparse -n diffs $options -- $argv
    or return

    if set -q _flag_h
        echo "diffs [-f/-w/-l/-L/-W/-h]"
        echo "      no option --> side by side, only diffs"
        echo "      -f --> like no argument, but print whole files"
        echo "      -w --> like no argument, but ignore all white spaces"
        echo "      -l --> line by line, only diffs"
        echo "      -L --> like -l, but print whole files"
        echo "      -W --> like -l, but ignore all white spaces"
        echo "      -h --> usage"
        return
    else if set -q _flag_f
        diff -r -y -s -W $COLUMNS $argv | less
    else if set -q _flag_w
        diff -r -y -s --suppress-common-line -W $COLUMNS -w $argv | less
    else if set -q _flag_l
        diff -r -s --suppress-common-line -W $COLUMNS $argv | less
    else if set -q _flag_L
        diff -r -s -W $COLUMNS $argv | less
    else if set -q _flag_W
        diff -r -s --suppress-common-line -W $COLUMNS -w $argv | less
    else                        # no option
        diff -r -y -s --suppress-common-line -W $COLUMNS $argv | less
    end
end