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Re: Some newbie questions

From: Adam Pribyl
Subject: Re: Some newbie questions
Date: Thu, 29 Oct 2015 22:11:11 +0100 (CET)
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)

On Thu, 29 Oct 2015, Jan Synáček wrote:

On Thu, Oct 29, 2015 at 2:23 PM, Thompson, David <address@hidden>

On Thu, Oct 29, 2015 at 6:08 AM, Jan Synáček <address@hidden>

I've been playing with guix a bit and I must say I really like it. I
understand a few things though.

1) How do I tell if a package I have installed had been built locally or
downloaded as a substitute?

You don't.  You can think of substitution is an optimization
technique, the results are indistinguishable except for that it likely
took less time to get the substitute.  It's possible to query the
substitute server to see if it has the store item that you have, but
that doesn't mean that your copy was retrieved from there necessarily.
Other than that, the Guix tools will tell you at build/download time
whether or not it is building from source or downloading a pre-built
binary.  What use-case do you have in mind?

Nothing really specific. I was just curious if it was possible. Now that I
think about it,
I should get the same result whether building myself or installing a

Right. Thats what is going on here - binary same.

I'm curious about one more thing. In /gnu/store/, there are built packages,
which I understand.
Then there are derivations, -builder files, standalone statically linked
binaries, some patches
and also some scheme files. There's also the .links directory that contains
various file formats
as well, only this time their names are only hashes. Does any
of information about what all those are exist? I couldn't find anything.
The .links directory takes
over 2GiB on my machine and I wonder why.

No idea. :)

Jan Synáček

Adam Pribyl

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