Re: Guix binary tarball

[Ludovic Courtès]

Hi, Thomas!

Thomas Schwinge <address@hidden> skribis:

> I'm not a fan of extracting tarballs inside populated directories; so I'm
> in favor on the suggested change to extract inside a temporary directory,
> and then move everything in place as a separate step.

OK.  I had come to the conclusion that yes, doing it in two steps is
reasonable, but it’s the user’s choice, and I wondered whether
describing the additional steps in the manual would make things look
more complicated than they are.  WDYT?

>     $ sudo ls -ld /root/.guix-profile /var/guix /gnu
>     drwxr-xr-x 3 30001 30000 4096 Mai 14 10:36 /gnu
>     lrwxrwxrwx 1 30001 30000   45 Mai 14 10:36 /root/.guix-profile -> 
> /var/guix/profiles/per-user/root/guix-profile
>     drwxr-xr-x 6 30001 30000 4096 Mai 14 10:36 /var/guix
>
> Should the tarball be packed such that it uses UID:GID 0:0, which -- I
> think? -- is always expected to map to root:root?

Yes, it was fixed in 01dbc7e.

> Which UID:GID should I now chown the files to?

root:root.

> It's very common, but I don't think there's a hard requirement for the
> root user's home directory to be /root.  Maybe instead of shipping it in
> the tarball, the symbolic link should be created by an explicit command?
>
>     $ sudo ln -sf /var/guix/profiles/per-user/root/guix-profile 
> ~root/.guix-profile

Yes, why not.  What do people think?

> <http://www.gnu.org/software/guix/manual/html_node/Build-Environment-Setup.html>.
>
>     $ sudo groupadd --system guix-builder
>     $ for i in `seq 1 10`; do sudo useradd -g guix-builder -G guix-builder -d 
> /var/empty -s `which nologin` -c "Guix build user $i" --system 
> guix-builder$i; done
>
> Please describe why ten is a good amount of Guix build users.

I’ve added this:

--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -478,6 +478,9 @@ Bash syntax and the @code{shadow} commands):
 @end example
 
 @noindent
+The number of build users determines how many build jobs may run in
+parallel, as specified by the @option{--max-jobs} option
+(@pxref{Invoking guix-daemon, @option{--max-jobs}}).
 The @code{guix-daemon} program may then be run as @code{root} with:

Thanks for providing feedback!

Ludo’.