GNU bug report logs - #76568
'package-install' should not install duplicate packages

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From: Ship Mints <shipmints <at> gmail.com>
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: 76568 <at> debbugs.gnu.org
Subject: bug#76568: 'package-install' should not install duplicate packages
Date: Fri, 7 Mar 2025 06:33:21 -0500

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On Wed, Mar 5, 2025 at 4:05 PM Ship Mints <shipmints <at> gmail.com> wrote:

> On Wed, Mar 5, 2025 at 4:02 PM Ship Mints <shipmints <at> gmail.com> wrote:
>
>> On Wed, Mar 5, 2025 at 2:55 PM Ship Mints <shipmints <at> gmail.com> wrote:
>>
>>> On Wed, Mar 5, 2025 at 12:00 PM Ship Mints <shipmints <at> gmail.com> wrote:
>>>
>>>> On Mon, Mar 3, 2025 at 9:34 PM Stefan Kangas <stefankangas <at> gmail.com>
>>>> wrote:
>>>>
>>>>> Ship Mints <shipmints <at> gmail.com> writes:
>>>>>
>>>>> > As part of my production upgrade to 30.1, and before I wrote a
>>>>> program to install my local
>>>>> > ELPA tree from scratch, I tried to first curate my packages and
>>>>> change from MELPA to
>>>>> > generally equivalent GNU ELPA or non-GNU ELPA archives.  The result
>>>>> was that I had two of
>>>>> > each package installed.
>>>>> >
>>>>> > I think there's a bug in 'package-install' which, when invoked from
>>>>> > 'package-install-button-action', processes the new package spec, and
>>>>> incorrectly checks to
>>>>> > see if the package is already installed.  Interactive invocation of
>>>>> 'package-install' yields the
>>>>> > package name from the prompt, not its archive description.
>>>>> >
>>>>> > If the below is correct, I can submit a patch to make
>>>>> 'package-install' behave like
>>>>> > 'package-reinstall' for the non-interactive case.
>>>>>
>>>>> Please submit a patch, but could we also have tests for this please?
>>>>>
>>>>> Thanks in advance.
>>>>>
>>>>
>>>> Patch attached.  It prevents the menu-driven case from erasing the
>>>> already installed message.  It could suggest to the user to remove and then
>>>> install or we could offer to use package upgrade to the chosen
>>>> package-desc.  At the very least, the patch prevents duplicates.
>>>>
>>>
>>> Thinking about it a bit more, this patch needs a little more work.  The
>>> menu-driven package "upgrade" in describe-package-1 workflow will be interrupted by
>>> this patch.  It does not differentiate install vs. upgrade and calls
>>> package-install which will now complain the package already exists.  This
>>> should be changed to run package-upgrade.  I'll take a look.
>>>
>>> Any feedback on the minimal patch is still welcome in the meantime.
>>>
>>
>> This patch now accommodates both scenarios.
>>
>
> Now with an amended commit log.
>

Attached patch with improved package replacement prompt.

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[0001-Correct-package-install-to-detect-installed-packages.patch (application/octet-stream, attachment)]

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