* -C -like option to change CWD on startup
@ 2023-02-02 8:55 Sebastian Gniazdowski
2023-02-02 9:05 ` Roman Perepelitsa
0 siblings, 1 reply; 3+ messages in thread
From: Sebastian Gniazdowski @ 2023-02-02 8:55 UTC (permalink / raw)
To: Zsh hackers list
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Hi,
make and git have the -C option which works like:
(
builtin cd -q $COPT
git/make "$@"
)
I think that it is very useful, because no lengthy subshell is needed. Zsh
doesn't have such option, could it be added? It's pitty that -C is already
used by NO_CLOBBER, but maybe some other letter is free (I didn't found
any)?
--
Best regards,
Sebastian Gniazdowski
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: -C -like option to change CWD on startup
2023-02-02 8:55 -C -like option to change CWD on startup Sebastian Gniazdowski
@ 2023-02-02 9:05 ` Roman Perepelitsa
2023-02-02 9:31 ` Sebastian Gniazdowski
0 siblings, 1 reply; 3+ messages in thread
From: Roman Perepelitsa @ 2023-02-02 9:05 UTC (permalink / raw)
To: Sebastian Gniazdowski; +Cc: Zsh hackers list
On Thu, Feb 2, 2023 at 9:57 AM Sebastian Gniazdowski
<sgniazdowski@gmail.com> wrote:
>
> Hi,
> make and git have the -C option which works like:
> (
> builtin cd -q $COPT
> git/make "$@"
> )
>
> I think that it is very useful, because no lengthy subshell is needed. Zsh doesn't have such option, could it be added? It's pitty that -C is already used by NO_CLOBBER, but maybe some other letter is free (I didn't found any)?
You can do this:
zsh-in-dir() ( builtin cd -q -- "$1" && builtin exec zsh "${@:2}" )
This forks and execs once, the same as if there was a native `-C dir` option.
Note that your original code has the same performance thanks to an
optimization in zsh. The second fork is elided.
Roman.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: -C -like option to change CWD on startup
2023-02-02 9:05 ` Roman Perepelitsa
@ 2023-02-02 9:31 ` Sebastian Gniazdowski
0 siblings, 0 replies; 3+ messages in thread
From: Sebastian Gniazdowski @ 2023-02-02 9:31 UTC (permalink / raw)
To: Roman Perepelitsa; +Cc: Zsh hackers list
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thanks for the interesting example. I would want to note two other programs
that follow -C option convention, namely tar and env. The second can be
even used to workaround the problem, i.e.:
env -C ~/github zsh -c 'some commands'
but still, a dedicated option would be good.
On Thu, 2 Feb 2023 at 09:05, Roman Perepelitsa <roman.perepelitsa@gmail.com>
wrote:
> On Thu, Feb 2, 2023 at 9:57 AM Sebastian Gniazdowski
> <sgniazdowski@gmail.com> wrote:
> >
> > Hi,
> > make and git have the -C option which works like:
> > (
> > builtin cd -q $COPT
> > git/make "$@"
> > )
> >
> > I think that it is very useful, because no lengthy subshell is needed.
> Zsh doesn't have such option, could it be added? It's pitty that -C is
> already used by NO_CLOBBER, but maybe some other letter is free (I didn't
> found any)?
>
> You can do this:
>
> zsh-in-dir() ( builtin cd -q -- "$1" && builtin exec zsh "${@:2}" )
>
> This forks and execs once, the same as if there was a native `-C dir`
> option.
>
> Note that your original code has the same performance thanks to an
> optimization in zsh. The second fork is elided.
>
> Roman.
>
--
Best regards,
Sebastian Gniazdowski
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^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-02-02 9:32 UTC | newest]
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2023-02-02 8:55 -C -like option to change CWD on startup Sebastian Gniazdowski
2023-02-02 9:05 ` Roman Perepelitsa
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