nixpkgs-suyu/nixos
Patryk Wychowaniec 2c55eba8f4
nixos: add --specialisation to nixos-rebuild
This commit fixes a papercut in nixos-rebuild where people wanting to
switch to a specialisation (or test one) were forced to manually figure
out the specialisation's path and run its activation script - since now,
there's a dedicated option to do just that.

This is a backwards-compatible change which doesn't affect the existing
behavior, which - to be fair - might still be considered sus by some
people, the painful scenario here being:

- you boot into specialisation `foo`,
- you run `nixos-rebuild switch`,
- whoops, you're no longer at specialisation `foo`, but you're rather
  brought back to the base system.

(it's especially painful for cases where specialisation is used to load
extra drivers, e.g. Nvidia, since then launching `nixos-rebuild switch`,
while forgetting that you're inside a specialisation, can cause some
parts of your system to get accidentally unloaded.)

I've tried to mitigate that by improving specialisations so that they
create a dedicated file somewhere in `/run/current-system` containing
the specialisation's name (which `nixos-rebuild` could then use as the
default value for `--specialisation`), but I haven't been able to come
up with anything working (plus it would be a breaking change then).

Closes https://github.com/NixOS/nixpkgs/issues/174065
2023-01-15 18:16:49 +01:00
..
doc nixos: add --specialisation to nixos-rebuild 2023-01-15 18:16:49 +01:00
lib Merge pull request #208762 from ncfavier/link-manpages-options-doc 2023-01-09 11:57:01 +01:00
maintainers
modules Merge pull request #206655 from vlinkz/distroname 2023-01-15 17:39:55 +01:00
tests nixos: add --specialisation to nixos-rebuild 2023-01-15 18:16:49 +01:00
COPYING
default.nix
README
release-combined.nix
release-small.nix
release.nix nixos: Add sd_image_minimal_new_kernel_no_zfs 2022-12-22 23:07:19 -05:00

*** NixOS ***

NixOS is a Linux distribution based on the purely functional package
management system Nix.  More information can be found at
https://nixos.org/nixos and in the manual in doc/manual.