If I'm reading that right, you're trying to get a list of your top 20
largest folders?  What does 'watch' do?

On Tue, Sep 17, 2013 at 9:47 AM, Martin Bähr
<mba...@email.archlab.tuwien.ac.at> wrote:
> hi,
>
> i am trying to convert the following watch command to fish:
>
> watch "(for i in *; do du -h \"\$i\"; done| tail -20 | cut -c 
> -\$((\$COLUMNS-5)))"
>
> actually, the problem i really wanted to solve is to change the order in
> which the files are processed. bash expands * alphabetically, and
> because the filenames contain spaces, i can't use
>
> for i in `ls -tr`...
>
> however that works in fish:
> for i in (ls -tr); du -sh $i; end | tail -20 | cut -c -(math $COLUMNS - 5)
>
> but now i can't wrap that with watch, because watch executes its
> argument with sh.
>
> a workaround is a simple loop:
> while true;
>   clear;
>   for i in (ls -tr);
>     du -sh $i;
>   end | tail -20 | cut -c -(math $COLUMNS - 5);
>   sleep 2;
> end
>
> unfortunately the clear; command causes an annoying flicker.
>
> ansi escape-sequences help:
>
> clear;
> while true;
>   echo \e\[H;
>   for i in (ls -tr);
>     du -sh $i;
>   end | tail -20 | cut -c -(math $COLUMNS - 5);
> sleep 2;
> end
>
> but only as long as each line fills the screen.
>
> i am going with this for now as it is good enough for my needs,
> but i am wondering if this can be improved...
>
> greetings, martin.
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