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From: Sean Whitton <spwhitton@HIDDEN>
To: Jim Porter <jporterbugs@HIDDEN>
Subject: Re: bug#72952: 30.0.90; Want way to break out of Eshell for loop
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Hello,
On Sun 08 Sep 2024 at 05:59pm -07, Jim Porter wrote:
> On 9/2/2024 1:26 AM, Sean Whitton wrote:
>> X-debbugs-cc: jporterbugs@HIDDEN
>> I am trying to run a series of tests like this:
>> % for test in tests/tests/tagupl* { tests/using-intree $test }
>> I want the command to give up as soon as one of the tests fails. But I
>> don't think there is any way to break out of the loop? In POSIX sh, you
>> could use 'break'.
>
> I actually have a patch sitting in my pile of branches that does this, but it
> needs a fair bit more work to get right. The main thing it needs is to keep
> 'break' from bubbling up too far (e.g. if you run an Eshell script from inside
> a loop, 'break' at the top level of the script shouldn't break out of the
> parent loop).
>
> Another way to do something like this would be to embrace the Lispy-ness of
> Eshell and add a command-form for 'throw' and 'catch'. Something like:
>
> catch my-tag {
> for i in *.el {
> do-stuff
> if something-or-other { throw my-tag }
> }
> }
>
> Or even support both 'throw'/'catch' *and* 'break'...
Heh. throw/catch seems like overkill to me but supporting both would be
cool!
--
Sean Whitton
bug-gnu-emacs@HIDDEN:bug#72952; Package emacs.
Full text available.
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Subject: Re: bug#72952: 30.0.90; Want way to break out of Eshell for loop
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To: Sean Whitton <spwhitton@HIDDEN>, 72952 <at> debbugs.gnu.org
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From: Jim Porter <jporterbugs@HIDDEN>
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On 9/2/2024 1:26 AM, Sean Whitton wrote:
> X-debbugs-cc: jporterbugs@HIDDEN
>
> I am trying to run a series of tests like this:
>
> % for test in tests/tests/tagupl* { tests/using-intree $test }
>
> I want the command to give up as soon as one of the tests fails. But I
> don't think there is any way to break out of the loop? In POSIX sh, you
> could use 'break'.
I actually have a patch sitting in my pile of branches that does this,
but it needs a fair bit more work to get right. The main thing it needs
is to keep 'break' from bubbling up too far (e.g. if you run an Eshell
script from inside a loop, 'break' at the top level of the script
shouldn't break out of the parent loop).
Another way to do something like this would be to embrace the Lispy-ness
of Eshell and add a command-form for 'throw' and 'catch'. Something like:
catch my-tag {
for i in *.el {
do-stuff
if something-or-other { throw my-tag }
}
}
Or even support both 'throw'/'catch' *and* 'break'...
bug-gnu-emacs@HIDDEN:bug#72952; Package emacs.
Full text available.
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From: Sean Whitton <spwhitton@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 30.0.90; Want way to break out of Eshell for loop
Date: Mon, 02 Sep 2024 09:26:55 +0100
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I am trying to run a series of tests like this:
% for test in tests/tests/tagupl* { tests/using-intree $test }
I want the command to give up as soon as one of the tests fails. But I
don't think there is any way to break out of the loop? In POSIX sh, you
could use 'break'.
Thanks.
--
Sean Whitton
Sean Whitton <spwhitton@HIDDEN>:jporterbugs@HIDDEN, bug-gnu-emacs@HIDDEN.
Full text available.jporterbugs@HIDDEN, bug-gnu-emacs@HIDDEN:bug#72952; Package emacs.
Full text available.
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