Re: Proof of Concept: Import Emacs' use-packaged packages into Guix' manifest.scm

[Andrew Tropin <andrew@trop.in>]

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On 2022-12-20 09:45, Mekeor Melire wrote:

> 2022-12-19 14:15 andrew@trop.in:
>
>> On 2022-12-18 09:11, Liliana Marie Prikler wrote:
>>
>> > Am Sonntag, dem 18.12.2022 um 01:54 +0000 schrieb Mekeor Melire:
>
>> I'm neither the author, nor the user of guix home import, however I think it 
>> could be a good place for such a functionality, but I would suggest to 
>> maintain this helper functions for a while in a personal channel, mature it 
>> and revisit this question later.
>
> Good idea. But separating this into a personal channel could also lead to the 
> feature being forgotten.
>
>> To make a solution more robust and complete, you can take a look at 
>> straight.el and how it redefines use-package-ensure-function and do 
>> something similiar to generate a list of packages for guix. Another detail 
>> is that use-package accepts a symbol value for :ensure and you can write 
>> something like:
>>
>> ;; (setq use-package-always-ensure t) ; as an alternative to :ensure t
>> (use-package vertico
>>   :ensure t
>>   ...)
>>
>> (use-package vertico-directory
>>   :ensure vertico
>>   ...)
>
> True! The parser should consider the :ensure keyword.
>
>> This way you won't need a concept of "blocked" packages.
>
> It'd still be good to have such a concept in order to block packages that 
> won't be used on Guix-driven system. For example:
>
> #+begin_src elisp
> (when (this-is-not-a-guix-driven-system)
>   (use-package some-package-that-is-not-packaged-for-guix))
>
> ;; or equivalently
>
> (use-package some-package-that-is-not-packaged-for-guix
>   :when (this-is-not-a-guix-driven-system))
> #+end_src
>
>> One more idea: make a function which accepts file-like/origin object instead 
>> of string and generates a package with propagated-dependencies based on the 
>> content of source code provided as an argument.
>
> You mean something like this?:
>
> #+begin_src scheme
> (define-public my-emacs
>   (emacs-from-init
>     :custom-emacs-package emacs-with-athena-instead-of-gtk
>     :init "/home/user/.emacs.d/init.el"))
> #+end_src

I meant something like this:

--8<---------------cut here---------------start------------->8---
(package-propagating-guix-packages-extracted-from-elisp-configuration
 ;; or just (local-file "./emacs/init.el") or maybe even a remote
 ;; repository with emacs configuration.
 #:configuration (local-file "./emacs/configuration/directory"
                             #:recursive? #t))
--8<---------------cut here---------------end--------------->8---

>
> By the way, this won't be a "pure" package. When using 
> =emacsWithPackagesFromUsePackage= feature from nix-community's emacs-overlay, 
> I needed to pass an --impure flag.
>
>> Personally, with my emacs config I do the things vice versa: I have elisp 
>> code in scheme files with a list of explicit dependencies:
>>
>> https://git.sr.ht/~abcdw/rde/tree/b57387f2/src/rde/features/emacs-xyz.scm#L946
>
> Interesting!

-- 
Best regards,
Andrew Tropin

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