Re: Guix extension to display derivation (and rewrite fixed-output)

[Leo Famulari]

On Fri, Apr 12, 2024 at 08:28:11PM +0200, Simon Tournier wrote:
> Therefore, I wrote a very simple Guix extension [1] that outputs
> derivation content using recutils format.

Amazing! That's so useful.

> Do you think it would be useful to package it?  Or maybe to include it
> as another subcommand (or part of some subcommand)?

I'd love for this to be built in to Guix. I'm often struggling to read
derivations while debugging or analysing something.

Guix extension to display derivation (and rewrite fixed-output)

[Simon Tournier]

Hi,

As an Emacs user, exploring Derivation (the .drv files) is easy since
there is an Emacs mode.  However, I have been annoyed with some pipe
through ’sed’ and friends.

Therefore, I wrote a very simple Guix extension [1] that outputs
derivation content using recutils format.

--8<---cut here---start->8---
$ guix drv-show $(guix build hello -d)
name: /gnu/store/qr00sgbh3vwwqswmgjjymg6wkys9r4i2-hello-2.12.1.drv
outputs:
+ /gnu/store/6fbh8phmp3izay6c0dpggpxhcjn4xlm5-hello-2.12.1   [out]
inputs:
+ /gnu/store/3ds56xg6njpw6hnp2w4xpx4psw5mka5q-glibc-2.35.drv
[out]
+ /gnu/store/3zh2qpi897s2x229s93iakji86b08a20-hello-2.12.1.drv  
[out]
+ /gnu/store/5bqhdbbl71r9r936w6w8zzqlk41md3wx-glibc-2.35.drv
[out]
+ /gnu/store/67nh3fzviy3q4s8ar8cg0dzhyzgwrwdd-module-import-compiled.drv
[out]
+ /gnu/store/7fsz44vifdc0ws0amnpwnmig3ra6hb53-gcc-11.3.0.drv
[lib]
+ /gnu/store/fchdaawcrxb35llbl7fj7lcsq5asmk4b-guile-2.0.14.drv  
[out]
+ /gnu/store/ky030dkfkfr3l8xgdbv45j6bs87988lx-gcc-11.3.0.drv
[lib]
+ /gnu/store/n9kblf5cx4lphrydjr90sp3zfvcdr1pb-glibc-utf8-locales-2.35.drv   
[out]
system: x86_64-linux
builder:
+ /gnu/store/4p1l5bdxxbyyqc3wh0d07jv9rp1pdcy7-guile-2.0.14/bin/guile
+ --no-auto-compile
+ -L /gnu/store/a6acf6dds8s9fw7dp5div03rwik0x4x2-module-import
+ -C /gnu/store/yk897hj2p5mdx6hw47s90n8x9pn6s36c-module-import-compiled
+ /gnu/store/fiy8arwqm8vwaqs4h8b361kbmjmd1yra-hello-2.12.1-builder
environment:
+ allowSubstitutes: 0
+ guix properties: ((type . graft) (graft (count . 2)))
+ out: /gnu/store/6fbh8phmp3izay6c0dpggpxhcjn4xlm5-hello-2.12.1
+ preferLocalBuild: 1
--8<---cut here---end--->8---

Do you think it would be useful to package it?  Or maybe to include it
as another subcommand (or part of some subcommand)?

Let me know. :-)

My motivation to do it now is this story:

https://simon.tournier.info/posts/2024-04-11-rewrite-drv.html


Cheers,
simon

1: https://gitlab.com/zimoun/guix-drv