From: Dominik Vogt <dominik.vogt@gmx.de>
To: zsh-users@zsh.org
Subject: Re: Shortened bit branch in prompt
Date: Wed, 10 Feb 2021 16:40:43 +0100 [thread overview]
Message-ID: <20210210154043.GA2143@gmx.de> (raw)
In-Reply-To: <1216298849.3722151.1612961113500@mail2.virginmedia.com>
On Wed, Feb 10, 2021 at 12:45:13PM +0000, Peter Stephenson wrote:
> > On 10 February 2021 at 12:05 Dominik Vogt <dominik.vogt@gmx.de> wrote:
> > I want to change that so
> >
> > * If the branch name is max. 25 characters, print it umodified.
> > * If the branch ame is loger, print
> >
> > <first 17 characters>...<last five characters>
> >
> > E.g. if the branch name is abcdefghijklmnopqrstuvwxyz0123456789,
> > the prompt should have
> >
> > abcdefghijklmnopq...56789
> >
> > Of course this should be done with zsh functionality only.
>
> It's possible to be completely general about printing a variable substitution
> based on the length, in this case of variable "foo":
>
> print ${${${${${:-$(( ${#foo} > 25 ))}##1}:-Printed if long}##0}:-Printed if short}
>
> Those arbitrary chunks are subject to further expansion, so put the expressions
> you need there --- in particular, $foo, ${foo[1.17]}...${foo[-5,-1]}, I haven't
> put those in myself just for the sake of clarity of what's going on.
Okay, that's past my abilities of reading expansions ... I've
done it with a bit of builtin scripting instead, using the $b[n,m]
syntax that I didn't know yet.
__git_ps1 () {
local b
b="$(git symbolic-ref -q HEAD 2> /dev/null)"
case "$?" in
128) return ;;
0) ;;
*) b='*none*' ;;
esac
b="${b##refs/heads/}"
test ${#b} -gt 25 && b="$b[1,17]...$b[-5,-1]"
test ${#b} -gt 0 && printf " (%s)" "$b"
}
Thanks for the help!
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
next prev parent reply other threads:[~2021-02-10 15:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 12:05 Dominik Vogt
2021-02-10 12:45 ` Peter Stephenson
2021-02-10 15:40 ` Dominik Vogt [this message]
2021-02-11 1:43 ` Bart Schaefer
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