Re: Find installed library version of GNU Guix commit x

[Zelphir Kaltstahl <zelphirkaltstahl@posteo.de>]

Hi simon!

I'll try to paraphrase my question:

If I run:

~~~~
guix time-machine \
     --channels="${DIR}/channels.scm" -- \
     environment \
     --manifest="${DIR}/manifest.scm"
~~~~

Using the files I wrote about, how would I go about knowing, which
version of guile-json I am really using? What command can I run, that
will list me the versions of packages, which I installed into the
environment, which I am temporarily creating using the above command?

With version, I mean something like "3.5.0".

When I do:

~~~~
guix install guile-json
The following package will be installed:
   guile-json 4.4.1
...
~~~~

I see the version. How can I look up that info in the created environment?

Regards,
Zelphir

On 1/7/21 1:30 PM, zimoun wrote:
> Hi,
>
> On Wed, 6 Jan 2021 at 20:52, Zelphir Kaltstahl
> <zelphirkaltstahl@posteo.de> wrote:
>
>> I would like to know a command line way of finding the version of a
>> library, which I install, when I am using time-machine as follows:
> [...]
>
>> So I already learned today:
>>
>> 1. Revisions seem to be the same thing as commit ids in the version
>> control system. Just a different name for the same thing.
>>
>> 2. Apparently package derivations are "the versions following from a git
>> commit of Guix", but there can be more shown, than I expected.
>>
>> Can you help me Guix noob out?^^
> What are you asking?  Sorry, I am confused and I am not sure to understand.
>
> About the Data Service, the commit ranges work per "state".  See [1]
> for an example.  Therefore, they are not always accurate.
>
> 1: https://lists.gnu.org/archive/html/guix-devel/2020-11/msg00420.html
>
>
> All the best,
> simon

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