From: "Bozhidar Batsov" <bozhidar@batsov.dev>
To: "Emacs Devel" <emacs-devel@gnu.org>
Subject: Re: Obtaining the version of an installed package
Date: Wed, 11 Aug 2021 10:15:36 +0300 [thread overview]
Message-ID: <62035d5e-5249-4952-b216-cb778ff7d28d@www.fastmail.com> (raw)
In-Reply-To: <jwvr1f2bpxy.fsf-monnier+emacs@gnu.org>
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On Mon, Aug 9, 2021, at 6:39 PM, Stefan Monnier wrote:
> Bozhidar Batsov [2021-08-09 17:03:21] wrote:
> > I guess that could work, although from what I gathered it operates only on
> > the current package. I was hoping to find something like an API like
> > `(package-get-version 'package-name)`.
>
> Ah, no, we don't have such an abstraction.
>
> Currently, you'd have to use the `package--alist` function (whose first
> call will take a bit of time to real all the <FOO>-pkg.el files) and
> then look inside its return value with `package-desc-<foo>`.
Got it, thanks!
>
> [ That's assuming you're interested in the packages currently installed.
> If you're interested in the packages currently activated, then you
> have that list in `package-activated-list` but that fails to record
> which version has been activated :-( ]
>
> Patches welcome to add more friendly accessors.
Will keep this in mind!
>
> I'm also curious to know the specific context in which you need that
> info. Is it to test at runtime whether some dependency includes
> a particular bugfix/feature ?
Yeah, something like this. Probably an overkill and it's not something I really need right now.
What I mostly needed was to extract the installed version of a snapshot package for debug purposes (useful for packages on MELPA to understand how old is the snapshot someone installed there). E.g. I print this in CIDER's REPL:
`;; CIDER 1.2.0snapshot (package: 20210729.521)`
In this case the "real" version 1.2.0-snapshot, but there's also the MELPA package version, that's basically the date the package was built.
The function you mentioned might help with this, probably in combination with lm-version.
>
>
> Stefan
>
>
>
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next prev parent reply other threads:[~2021-08-11 7:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 8:28 Obtaining the version of an installed package Bozhidar Batsov
2021-08-09 12:58 ` Stefan Monnier
2021-08-09 14:03 ` Bozhidar Batsov
2021-08-09 15:35 ` Philip Kaludercic
2021-08-09 15:39 ` Stefan Monnier
2021-08-11 7:15 ` Bozhidar Batsov [this message]
2021-08-11 13:28 ` Stefan Monnier
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