From: Han Boetes <hboetes@gmail.com>
To: zsh-workers@zsh.org
Subject: Re: zsh watch function
Date: Sat, 16 May 2020 16:31:00 +0200 [thread overview]
Message-ID: <CAOzo9e4phyeSNmPAY_hk3YChrivB_7y76b_PS+CXaMyATO2f-w@mail.gmail.com> (raw)
In-Reply-To: <CAOzo9e5HaXkoZSaVtb8gfJzV7ZThY1dStC8ToxLK68WtSBZJLQ@mail.gmail.com>
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And then I saw the padding light, here an improved version:
watch () {
IN=2
case $1 in
-n)
IN=$2
shift 2
;;
esac
clear
HN="$(hostname)"
CM="$*"
LEFT="$(printf 'Every %.1f: %s' $IN $CM)"
((PAD = COLUMNS - ${#LEFT}))
while :
do
DT=$(date)
printf "$LEFT%${PAD}s\n" "$HN $(date)"
eval "$CM"
sleep $IN
clear
done
}
On Sat, May 16, 2020 at 2:20 PM Han Boetes <hboetes@gmail.com> wrote:
> In this online question someone asked if a watch internal command was
> available, like with bash:
>
> https://unix.stackexchange.com/questions/260323/watch-equivalent-in-zsh
>
> I couldn't help myself but to write the code for that. Fun fact is that
> code-colouring and aliases work. This code is probably not fool proof. Feel
> free to improve. Please consider adding it in improved form to the ZSH
> distribution.
>
> watch () {
> IN=2
> case $1 in
> -n)
> IN=$2
> shift 2
> ;;
> esac
> clear
> HN="$(hostname)"
> HD="$(printf 'Every %.1f: ' $IN)"
> CM="$*"
> # Where does that -2 come from?
> ((PAD = COLUMNS - ${#HD} - ${#CM} - ${#DT} - 2))
> while :
> do
> DT=$(date)
> printf "$HD%s%${PAD}s: %s\n\n" "$CM" "$HN" "$DT"
> # echo "$LFT $RHT"
> eval "$CM"
> sleep $IN
> clear
> done
> }
>
next prev parent reply other threads:[~2020-05-16 14:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-16 12:20 Han Boetes
2020-05-16 14:31 ` Han Boetes [this message]
2020-05-16 20:59 ` Daniel Shahaf
2020-05-16 23:10 ` Han Boetes
2020-05-16 14:36 ` Roman Perepelitsa
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