setting up my own channel (for some personal packages)

[Andreas Reuleaux <rx@a-rx.info>]

Hi,

I am trying to set up my own channel for some personal packages,
and I do have some success to that end, but I am still experiencing
issues:


TL;dr - short summary:

  my package: emacs-hide-comnt.scm (below) breaks my setup for "guix pull"
  (which otherwise works just fine without that package)
  my package emacs-hide-comnt.scm cannot be too bad either:
  I can build+install it just fine by hand.
  


I am following the guix guide, and have stolen two packages from

--8<---------------cut here---------------start------------->8---
https://github.com/jsoo1/guix-channel
--8<---------------cut here---------------end--------------->8---

namely emacs-dump.scm (which provides my-emacs-dump), and
urweb.scm.

I have set up my own git repo (with just these two packages for now) at:


--8<---------------cut here---------------start------------->8---
http://git.a-rx.info/channel
--8<---------------cut here---------------end--------------->8---

and (with a git-url) in my ~/.config/guix/channels.scm:

--8<---------------cut here---------------start------------->8---
(cons (channel
       (name 'my-stuff)


       (url "git://git.a-rx.info/channel")

       (introduction
        (make-channel-introduction
	 "56384c65b5d57606cd7ff3e2a4db1c99c24d7adf"
         (openpgp-fingerprint
          "99BB E77D 73AE 07B9 D4B0  CA2E 3384 11E5 6E09 31B5")
         ))

       )
      %default-channels)
--8<---------------cut here---------------end--------------->8---


I can "guix pull" (I am using "--allow-downgrades" the first time here, as I have used
channel my-stuff with a different inital commit before), anyway this
works fine so far - guix pull does not complain about the my-stuff channel.

--8<---------------cut here---------------start------------->8---
rx@dell ~$ guix pull --allow-downgrades
Updating channel 'my-stuff' from Git repository at 'git://git.a-rx.info/channel'...
guix pull: warning: moving channel 'my-stuff' from 12ac4ab75c0b9dc247af3a65179c566e198d908d to unrelated commit 56384c65b5d57606cd7ff3e2a4db1c99c24d7adf
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Building from these channels:
  guix      https://git.savannah.gnu.org/git/guix.git	63fec9f
  my-stuff  git://git.a-rx.info/channel	56384c6
Computing Guix derivation for 'x86_64-linux'... /
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
The following derivations will be built:
   /gnu/store/dsb3bcmddgsvn34wxh0g2mbm4lyq1haz-profile.drv
   /gnu/store/d227lqkghmg48b34b81si8hdmz3vba64-my-stuff.drv
   /gnu/store/mcp30c79gi9cdnckg4ghahkaygn85ykk-inferior-script.scm.drv
   /gnu/store/d84yrjgr6bkg7c6h9i0bxjz7cfxhisp2-profile.drv
   /gnu/store/vrr8flhvf06xprqm6n9q45pj10h7r10g-inferior-script.scm.drv

building /gnu/store/mcp30c79gi9cdnckg4ghahkaygn85ykk-inferior-script.scm.drv...
building /gnu/store/d227lqkghmg48b34b81si8hdmz3vba64-my-stuff.drv...
building CA certificate bundle...
listing Emacs sub-directories...
building fonts directory...
building directory of Info manuals...
building database for manual pages...
building profile with 2 packages...
building /gnu/store/vrr8flhvf06xprqm6n9q45pj10h7r10g-inferior-script.scm.drv...
building package cache...
building profile with 2 packages...
New in this revision:
  2 new packages: lsofgraph, urweb

rx@dell ~$ guix pull 
Updating channel 'my-stuff' from Git repository at 'git://git.a-rx.info/channel'...
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Building from these channels:
  guix      https://git.savannah.gnu.org/git/guix.git	63fec9f
  my-stuff  git://git.a-rx.info/channel	56384c6
Computing Guix derivation for 'x86_64-linux'... /
nothing to be done

rx@dell ~$
--8<---------------cut here---------------end--------------->8---

and "urweb" is available, for example


--8<---------------cut here---------------start------------->8---
rx@dell ~$ guix package -A urwe
urweb	20190217	out	urweb.scm:15:2
rx@dell ~
--8<---------------cut here---------------end--------------->8---



Thus apparently my setup is not too bad (including my rx.key in the
keyring branch etc.).


Now I am setting up a second channel2 instead: again with the two packages
emacs-dump.scm and urweb.scm as above, but additionally an emacs package
that I have created myself: emacs-hide-comnt.scm

(Really this is just a prerequisite for another package that I am
interested in, and I have a package definition for as well:
emacs-thing-cmds.scm - but I keep that question for another mail):

Now with my ~/.config/guix/channels.scm for channel2:

--8<---------------cut here---------------start------------->8---
(cons (channel
       (name 'my-stuff2)


       (url "git://git.a-rx.info/channel2")

       (introduction
        (make-channel-introduction
	 "3a64194919ceeb16ee03df17de2c3c612d410145"
         (openpgp-fingerprint
          "99BB E77D 73AE 07B9 D4B0  CA2E 3384 11E5 6E09 31B5")
         ))

       )
      %default-channels)
--8<---------------cut here---------------end--------------->8---


I cannot pull any more:

--8<---------------cut here---------------start------------->8---
rx@dell ~$ guix pull 
Updating channel 'my-stuff2' from Git repository at 'git://git.a-rx.info/channel2'...
Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Building from these channels:
  guix      https://git.savannah.gnu.org/git/guix.git	63fec9f
  my-stuff2 git://git.a-rx.info/channel2	3a64194
Computing Guix derivation for 'x86_64-linux'... -
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
The following derivations will be built:
   /gnu/store/1vvwqnj7d1hp8nf8kcpf1r5wrlibkxya-profile.drv
   /gnu/store/hiqych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv
   /gnu/store/b0hk5dvfid7pkjxrwfylmkn5w3pwzbxq-inferior-script.scm.drv
   /gnu/store/5ww6yaqz98jnkp2gfdpjzksx5azwd63i-inferior-script.scm.drv
   /gnu/store/j9w5gvf7slfc1ahmryd45i0nfr3j8509-profile.drv

building /gnu/store/b0hk5dvfid7pkjxrwfylmkn5w3pwzbxq-inferior-script.scm.drv...
building /gnu/store/hiqych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv...
|builder for `/gnu/store/hiqych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv' failed to produce output path `/gnu/store/ww01v7zdx110q887146y9m67j3rikypw-my-stuff2'
build of /gnu/store/hiqych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv failed
View build log at '/var/log/guix/drvs/hi/qych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv.bz2'.
cannot build derivation `/gnu/store/1vvwqnj7d1hp8nf8kcpf1r5wrlibkxya-profile.drv': 1 dependencies couldn't be built
guix pull: error: build of `/gnu/store/1vvwqnj7d1hp8nf8kcpf1r5wrlibkxya-profile.drv' failed
rx@dell ~$
--8<---------------cut here---------------end--------------->8---

with

--8<---------------cut here---------------start------------->8---
rx@dell ~$ bzcat '/var/log/guix/drvs/hi/qych1a0qdmdzq45mi1k96df9zr0p7k-my-stuff2.drv.bz2'
(repl-version 0 1 1)
(exception misc-error (value #f) (value "no code for module ~S") (value ((emacs-hide-comnt))) (value #f))
rx@dell ~$
--8<---------------cut here---------------end--------------->8---


Apparently my emacs-hide-comnt.scm package
at http://git.a-rx.info/channel2/tree/ breaks my setup.

And I don't see why: I can download the package and build/install it
just fine:


--8<---------------cut here---------------start------------->8---
rx@dell ~$ wget -nd http://git.a-rx.info/channel2/plain/emacs-hide-comnt.scm
--2021-08-28 16:46:47--  http://git.a-rx.info/channel2/plain/emacs-hide-comnt.scm
Resolving git.a-rx.info (git.a-rx.info)... 178.79.166.98
Connecting to git.a-rx.info (git.a-rx.info)|178.79.166.98|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2035 (2.0K) [text/plain]
Saving to: ‘emacs-hide-comnt.scm’

emacs-hide-comnt.scm               100%[===============================================================>]   1.99K  --.-KB/s    in 0s      

2021-08-28 16:46:47 (324 MB/s) - ‘emacs-hide-comnt.scm’ saved [2035/2035]

rx@dell ~$
--8<---------------cut here---------------end--------------->8---








--8<---------------cut here---------------start------------->8---
rx@dell ~$ guix build -f emacs-hide-comnt.scm 
/gnu/store/w098p5vxd0iy31mxkcp47xk3n5f5d175-emacs-hide-comnt-2019.11
rx@dell ~$ 
rx@dell ~$ guix install $(guix build -f emacs-hide-comnt.scm)
The following package will be upgraded:
   emacs-hide-comnt (dependencies or package changed)

nothing to be done
rx@dell ~$
--8<---------------cut here---------------end--------------->8---


Hm???

One difference that I see: my emacs-hide-comnt.scm has
a last line of 
--8<---------------cut here---------------start------------->8---
emacs-hide-comnt
--8<---------------cut here---------------end--------------->8---

and I need that for building the package by hand - If I remove
that line (the corresponding packages: emacs-dump.scm, urweb.scm
don't have such last lines): then I cannot build my package by hand
any more - and worse: I still cannot pull from my channel2 ??

Thanks in advance.