Re: Guix size reduction work group

[Julien Lepiller <julien@lepiller.eu>]

Le 10 février 2020 03:09:57 GMT-05:00, Pierre Neidhardt <mail@ambrevar.xyz> a écrit :
>zimoun <zimon.toutoune@gmail.com> writes:
>
>>> Say FOO has BAR in its closure, but not in the explicit inputs, how
>can
>>> I figure out which of the indirect inputs drags BAR in?
>>
>> I do not understand what you are looking for, but there is already:
>>
>>    guix graph -t reverse-package
>>     guix graph -t reverse-bag
>
>Yes, but this produces way too big a graph, which was my point below.
>
>> Maybe something more dynamic using 'd3.js' or similar to view *big*
>> graphs could help.
>
>Indeed!
>
>> The first step seems to list what operations and filtering is
>missing.
>
>I'm not sure what d3.js can do, but I can think of the following:
>
>- The ability to "hide" nodes and all their edges by making them
>  translucent (so that they can be unhidden).
>
>- Hide/show all nodes inside the mouse rectangular selection.
>
>- Hide/show all nodes matching some text.
>
>- Close the current selection, that is, if some intermediary nodes are
>  hidden for the currently showing nodes, show them.
>
>> You could propose such feature to the Guix Data Service.
>> For example, on this webpage [1], the history of all the Git package
>> in Guix is shown. The closure size could be reported.
>>
>> [1] http://data.guix.gnu.org/repository/1/branch/master/package/git
>
>This is a great idea!  Christopher, what do you think?

I remember there was a script for graphviz floating around that could do exactly that: given two nodes it would only keep those in between them. Then you could generate a much smaller graph.