[Nix-dev] nix-build -A <pkgs> builds everything

[Guillaume Maudoux (Layus)]

Hi,

Neat trick.

Am I right however to say that this does not work if your own channel is
not up to date.
Nothing forces branch channels/nixos-unstable on
github.com/NixOS/nixpkgs-channels to point at the same revision as the
one in /nix/var/nix/profiles/per-user/root/channels/nixos/svn-revision.

As for me, I update my tag on the current channel revision after each
update, and branch/rebase on top of it.

I will update the wiki to reference the manual.

Le 19/11/15 15:50, Eelco Dolstra a écrit :
> Hi,
>
> On 19/11/15 11:46, Guillaume Maudoux (Layus) wrote:
>
>> To get binary support, you should develop on a branch based on the same
>> commit as you current channel.
>> See
>> https://nixos.org/wiki/Create_and_debug_nix_packages#Tracking_upstream_changes_and_avoiding_extra_rebuilding
>> for extra details and  step-by-step commands.
> There is an easier way than described on the wiki, namely by using the
> nixpkgs-channels repository, which contains branches corresponding to the
> current channel contents.
>
> For instance, to create a branch named "local" based on the latest
> nixos-unstable channel:
>
> $ git remote add channels git://github.com/NixOS/nixpkgs-channels.git
> $ git remote update channels
> $ git checkout -b local channels/nixos-unstable
>
> and to update it:
>
> $ git remote update channels
> $ git merge channels/nixos-unstable # or "git rebase"
>
> See http://nixos.org/nixos/manual/index.html#sec-getting-sources for more info.
>