[Nix-dev] Gratuitous generations

[phreedom at yandex.ru]

On Tuesday, March 31, 2015 11:42:15 you wrote:
> Ah, I didn't know about that option!  That sounds good; where does it copy
> it to, though?  It isn't clear to me from the docs.

/nix/var/nix/profiles/system*/configuration.nix
It's a bit easier to access when dealing with old/multiple profiles.


> On Tue, Mar 31, 2015 at 8:02 AM, <phreedom at yandex.ru> wrote:
> > On Monday, March 30, 2015 16:16:36 Ryan Trinkle wrote:
> > > Ah, great point!  This line worked perfectly for me:
> > > 
> > > environment.etc."nixos/current/configuration.nix".text =
> > 
> > builtins.readFile
> > 
> > > ./configuration.nix;
> > 
> > I have been using this option: system.copySystemConfiguration = true;
> > 
> > Placing the current config "closer" to /etc/nixos/configuration.nix makes
> > it
> > easier to run diff against the active profile. copySystemConfiguration's
> > location
> > makes it easier to dig older profiles. Maybe it's a good idea to use both
> > locations?
> > 
> > > On Mon, Mar 30, 2015 at 4:10 PM, Michael Raskin <7c6f434c at mail.ru>
> > 
> > wrote:
> > > > >On Mon, Mar 30, 2015 at 9:47 PM, Ryan Trinkle <ryan.trinkle at gmail.com
> > > > 
> > > > wrote:
> > > > >> On a somewhat related note, is there any way to see the exact
> > > > >> configuration.nix for a particular generation?  It would be great
> > 
> > to be
> > 
> > > > able
> > > > 
> > > > >> to diff generations against each other (e.g.: to figure out whether
> > 
> > a
> > 
> > > > >> channel update caused a problem or whether it was my own change).
> > > > >
> > > > >You are not the first one to request this feature.
> > > > >They are a few issues in the way, but I will open an issue and do it
> > > > >as soon as I am done with the httpd rewrite.
> > > > 
> > > > In the meantime just adding /etc/ entry that is a copy of
> > > > /etc/nixos/configuration.nix should work…
> > 
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