GNU bug report logs - #60896
make error if not in 7z format

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Package: emacs; Reported by: Dan Jacobson <jidanni@HIDDEN>; Keywords: moreinfo; dated Wed, 18 Jan 2023 00:53:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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From: Eli Zaretskii <eliz@HIDDEN>
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Subject: Re: bug#60896: dired-view-file vs. .7z
References: <878ri0wtop.5.fsf@HIDDEN> <83mt6g0y5z.fsf@HIDDEN>
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> From: Dan Jacobson <jidanni@HIDDEN>
> Cc: 60896 <at> debbugs.gnu.org,control <at> debbugs.gnu.org
> Date: Wed, 25 Jan 2023 10:51:43 +0800
> 
> Well, if the file is not in 7z format,
> then I hope dired-view-file would make an error message,
> like it does if a file is not in .gz format:
> ---
> Error while executing "gzip -c -q -d < /tmp/x.gz"
> 
> 
> gzip: stdin: not in gzip format

That gzip error message comes from the gzip program, not from Emacs.
What does 7z say in a similar case?  That's what dired-view-file
should show.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#60896; Package emacs. Full text available.
Changed bug title to 'make error if not in 7z format' from 'dired-view-file vs. .7z' Request was from Dan Jacobson <jidanni@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Dan Jacobson <jidanni@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#60896: dired-view-file vs. .7z
References: <878ri0wtop.5.fsf@HIDDEN> <83mt6g0y5z.fsf@HIDDEN>
Date: Wed, 25 Jan 2023 10:51:43 +0800
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rename 60896 make error if not in 7z format
thanks

I see.
OK.
Well, if the file is not in 7z format,
then I hope dired-view-file would make an error message,
like it does if a file is not in .gz format:
---
Error while executing "gzip -c -q -d < /tmp/x.gz"


gzip: stdin: not in gzip format
---
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#60896; Package emacs. Full text available.
Added tag(s) moreinfo. Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at 60896 <at> debbugs.gnu.org:


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Subject: Re: bug#60896: dired-view-file vs. .7z
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> From: Dan Jacobson <jidanni@HIDDEN>
> Date: Wed, 18 Jan 2023 08:52:06 +0800
> 
> dired-view-file knows how to deal with .gz,
> but not .7z.

It does here, at least with Emacs 27 and later.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#60896; Package emacs. Full text available.

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From: Dan Jacobson <jidanni@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: dired-view-file vs. .7z
Date: Wed, 18 Jan 2023 08:52:06 +0800
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dired-view-file knows how to deal with .gz,
but not .7z.

$ apropos 7z
7z (1)               - A file archiver with high compression ratio format
7za (1)              - A file archiver with high compression ratio format
7zr (1)              - A file archiver with high compression ratio format
p7zip (1)            - Wrapper on 7-Zip file archiver with high compression ratio
Acknowledgement sent to Dan Jacobson <jidanni@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#60896; Package emacs. Full text available.
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