User:SigmaSquadron/Template:Evaluate

Proposal

Alter the Template:Evaluate to support more commands than just switch by providing the optional attribute action. This change is backwards compatible and requires no changes to existing template calls.

About

This template is used to remind end-users that they need to rebuild for the changes to take effect. The optional attribute action can be used to define the subcommand suggested by the tip.

Usage

Default Evaluate Box:

{{Evaluate}}

Boot Evaluate Box:

{{Evaluate|action=boot}}

Test Evaluate Box:

{{Evaluate|action=test}}

Example

Default Evaluate Box: (Called without action)

Tip

In order to affect your NixOS system by your nix-language-specific changes you must first evaluate it:

$ nixos-rebuild switch --use-remote-sudo

Boot Evaluate Box:

Tip

In order to affect your NixOS system by your nix-language-specific changes you must first evaluate it:

$ nixos-rebuild boot --use-remote-sudo

Then, reboot:

$ systemctl reboot

Test Evaluate Box:

Tip

In order to affect your NixOS system by your nix-language-specific changes you must first evaluate it:

$ nixos-rebuild test --use-remote-sudo

Remember: any changes evaluated through nixos-rebuild test will not persist upon reboot.

Potential Issues

• You could call some other {{{action}}}, like so: {{Evaluate|action=list-generations}}, and the message about evaluating your configuration would no longer make any sense. I expect editors to know better than that though.

• This could be rewritten with just
  

  Tip

  In order to affect your NixOS system by your nix-language-specific changes you must first evaluate it:

  $ nixos-rebuild boot --use-remote-sudo

  Then, reboot:

  $ systemctl reboot

  , and use {{{1}}} instead of {{{action}}}. I personally dislike this alternative syntax, but it may be preferable to editors.
  • The usage of --use-remote-sudo means that the command wouldn't work for those not using sudo. However, there is the tiny benefit that the evaluation and build process is no longer called by the root user, which may be helpful for those using flake-based evaluation. Also, it can point users on the right path when they begin to build systems remotely.

  Code

  <noinclude>{{DISPLAYTITLE:Template:evaluate}}
  
  == About ==
  This template is used to remind end-users that they need to rebuild for the changes to take effect. The optional attribute <code>action</code> can be used to define the subcommand suggested by the tip.
  
  == Usage ==
  
  Default <code>Evaluate</code> Box:
  
  <pre>
  <nowiki>{{Evaluate}}</nowiki>
  </pre>
  
  Boot <code>Evaluate</code> Box:
  
  <pre>
  <nowiki>{{Evaluate|boot}}</nowiki>
  </pre>
  
  
  Test <code>Evaluate</code> Box:
  
  <pre>
  <nowiki>{{Evaluate|boot}}</nowiki>
  </pre>
  
  == Example ==
  Default <code>Evaluate</code> Box:
  {{Evaluate}}
  
  Boot <code>Evaluate</code> Box:
  {{Evaluate|action=boot}}
  
  Test <code>Evaluate</code> Box:
  {{Evaluate|action=test}}
  
  </noinclude><includeonly>{{Tip
  |1=In order to '''affect''' your NixOS system by your nix-language-specific changes you must first '''evaluate''' it:{{Commands|$ nixos-rebuild {{{action|switch}}} --use-remote-sudo}}{{#ifeq: boot | {{{action}}} | Then, reboot:{{Commands|$ systemctl reboot}}}}{{#ifeq: test | {{{action}}} | '''Remember:''' any changes evaluated through <code>nixos-rebuild test</code> '''will not''' persist upon reboot.}}}}</includeonly>