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Re: Reuse package output for new package

From: jbranso
Subject: Re: Reuse package output for new package
Date: Tue, 11 Oct 2022 19:17:19 +0000

September 13, 2022 12:28 AM, "phodina via" <> wrote:

> Hi,
> is there a way to create a new package by reusing the output of the original 
> derivation and just
> add files to the new package into the new output?
> The usecase is PhotoGimp [1] which is set of files which are added to an 
> already built gimp
> package.

Huh, I've never heard of this.  But that's an awesome use case!

> There standard way is to inherit the package and add these files but that 
> will result in rebuilt,
> right?

I believe that it would, but I'm not the genius guix hacker that
*insert the name of a genius guix hacker here*.

> Alternative idea is to use copy-build-system and copy the already created 
> package files into the
> output. Then just add additional files.
> However, there's also a draw back if the original package contains hardcoded 
> variable. But this
> would be only problem if I specify something in the #:phases, correct?
> The main idea here is to save the computing resources on packages that take 
> long time and their
> behviour can be changed by plugins/config files etc.
> Of course the simplest way to use [1] it is to unpack the content of the home 
> dir but IMHO that's
> not the correct way how to package this program.
> [1]
> ----
> Petr

I say give one of your methods a try.  Post some code back here when you run 
trouble.  :)


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