Hi,
On Tue, 23 Jul 2024 at 13:24, "Zack Weinberg" via Bug reports for GNU Guix
<bug-guix@gnu.org> wrote:
> I would have expected "guix graph -t referrers"
> to report that the package was a direct dependency of the
> operating-system derivation itself
Hum, I do not think that “guix graph” operated on the level of
’operating-system’. That said, indeed something seems unexpected: you
get,
> # guix graph -t referrers lsof
> digraph "Guix referrers" {
> "/gnu/store/7fkgda85xj4dr2d0r8lafyvnx5b9xwzp-lsof-4.94.0"
> [label = "lsof-4.94.0", shape = box, fontname = sans];
> }
and the manual reads [1],
‘referrers’
This is the graph of the “referrers” of a store item, as returned
by ‘guix gc --referrers’ (*note Invoking guix gc::).
This relies exclusively on local information from your store. For
instance, let us suppose that the current Inkscape is available in
10 profiles on your machine; ‘guix graph -t referrers inkscape’
will show a graph rooted at Inkscape and with those 10 profiles
linked to it.
It can help determine what is preventing a store item from being
garbage collected.
--8<---------------cut here---------------start------------->8---
$ guix package -p /tmp/one-profile -I
lsof 4.94.0 out /gnu/store/6nyp9cvksvyfww5d7j7rvm43jb46p521-lsof-4.94.0
$ guix gc --referrers /gnu/store/6nyp9cvksvyfww5d7j7rvm43jb46p521-lsof-4.94.0
/gnu/store/5wmvmlba841wvy681840cjwjcdifcjq2-profile
$ guix graph -t referrers
/gnu/store/6nyp9cvksvyfww5d7j7rvm43jb46p521-lsof-4.94.0
digraph "Guix referrers" {
"/gnu/store/6nyp9cvksvyfww5d7j7rvm43jb46p521-lsof-4.94.0" [label =
"lsof-4.94.0", shape = box, fontname = sans];
"/gnu/store/6nyp9cvksvyfww5d7j7rvm43jb46p521-lsof-4.94.0" ->
"/gnu/store/5wmvmlba841wvy681840cjwjcdifcjq2-profile" [color = red];
"/gnu/store/5wmvmlba841wvy681840cjwjcdifcjq2-profile" [label = "profile",
shape = box, fontname = sans];
"/gnu/store/5wmvmlba841wvy681840cjwjcdifcjq2-profile" ->
"/gnu/store/5wmvmlba841wvy681840cjwjcdifcjq2-profile" [color = darkgoldenrod];
}
--8<---------------cut here---------------end--------------->8---
So far, so good! However, indeed:
--8<---------------cut here---------------start------------->8---
$ guix graph -t referrers lsof
digraph "Guix referrers" {
"/gnu/store/7fkgda85xj4dr2d0r8lafyvnx5b9xwzp-lsof-4.94.0" [label =
"lsof-4.94.0", shape = box, fontname = sans];
}
--8<---------------cut here---------------end--------------->8---
And the reason is because grafts.
--8<---------------cut here---------------start------------->8---
$ guix build lsof --no-grafts
/gnu/store/7fkgda85xj4dr2d0r8lafyvnx5b9xwzp-lsof-4.94.0
$ guix package -p /tmp/another-profile -i lsof --no-grafts
$ guix graph -t referrers lsof
digraph "Guix referrers" {
"/gnu/store/7fkgda85xj4dr2d0r8lafyvnx5b9xwzp-lsof-4.94.0" [label =
"lsof-4.94.0", shape = box, fontname = sans];
"/gnu/store/7fkgda85xj4dr2d0r8lafyvnx5b9xwzp-lsof-4.94.0" ->
"/gnu/store/hjgbwa566fwzmwvrdal5ycxzlzz3al6x-profile" [color = blue];
"/gnu/store/hjgbwa566fwzmwvrdal5ycxzlzz3al6x-profile" [label = "profile",
shape = box, fontname = sans];
"/gnu/store/hjgbwa566fwzmwvrdal5ycxzlzz3al6x-profile" ->
"/gnu/store/hjgbwa566fwzmwvrdal5ycxzlzz3al6x-profile" [color = darkgoldenrod];
}
--8<---------------cut here---------------end--------------->8---
Well, the fix should be to have the grafted item by default pointing to
the non-grafted one and potentially referencing the others as describe
by the manual.
Cheers,
simon
1: https://guix.gnu.org/manual/devel/en/guix.html#Invoking-guix-graph
