testing

name	testing
description	Test changes using module-graph and build commands

Testing

Critical Requirement

After making changes you must always evaluate and test them.

Finding Affected Configurations

Use module-graph script to find which hosts and homes are affected by changed files:

./flake/dev/scripts/module-graph.nu

This outputs JSON showing which configs use each file:

{
  "file": "modules/nixos/services/tailscale.nix",
  "hosts": ["nixdev", "nixmi", "nixcloud"],
  "homes": []
}

Minimum Test Requirements

Based on module-graph output, test at least one of each affected type:

Changed File Affects	Minimum Test
Hosts only	Build one affected host
Homes only	Build one affected home
Both hosts and homes	Build one host and one home

Test Commands

Test host configuration

nix build .#nixosConfigurations.<hostname>.config.system.build.toplevel

Test home configuration

nix build .#homeConfigurations."<user>@<host>".activationPackage

Run full flake check

nix flake check --override-input devenv-root "file+file://$PWD/.devenv/root"

Testing Workflow Example

1. Make changes to modules/nixos/services/tailscale.nix

2. Run module-graph to find affected configs:

   ./flake/dev/scripts/module-graph.nu | jq '.[] | select(.file | contains("tailscale"))'
   

3. Pick one affected host and build it:

   nix build .#nixosConfigurations.nixdev.config.system.build.toplevel
   

4. If change also affects homes, build one:

   nix build .#homeConfigurations."racci@nixmi".activationPackage