personal nix-darwin configuration

This repository contains a single-file flake at flake.nix that defines a nix-darwin configuration for host david and also exposes a Home Manager user configuration homeConfigurations.david.

Quick summary

• System config: darwinConfigurations.david
• Home config: homeConfigurations.david
• Activation logs: /var/log/darwin-activation.log

Files of note

• flake.nix - single-file flake with nix-darwin + Home Manager (darwin-native activation)
• scripts/bootstrap-home-manager.sh - one-shot installer (per-user) to install home-manager into the user profile and run an initial switch
• scripts/test-activation-dryrun.sh - dry-run test that simulates activation scripts against a temporary home
• Justfile - task shortcuts (bootstrap, rebuild, dry-run, view logs)

Home Manager activation behavior

• The darwin activation now builds the flake's Home Manager activation package and runs it as the david user. This is implemented in system.activationScripts.applyHomeManager and uses nix build "/Users/david/.config#homeConfigurations.david.activationPackage" -o /nix/var/nix/profiles/per-user/root/home-activation.
• The activation step uses a persistent symlink under /nix/var/nix/profiles/per-user/root/home-activation so repeated activations can reuse the previously-built package when unchanged.

Bootstrapping

1. Optional: run the bootstrap script once as your normal user to install a per-user home-manager binary:

   chmod +x scripts/bootstrap-home-manager.sh ./scripts/bootstrap-home-manager.sh /Users/david/.config

2. Apply the system configuration with:

   sudo darwin-rebuild switch --flake /Users/david/.config#david

Logs

• Check /var/log/darwin-activation.log for timestamped messages written by the activation scripts (VS Code settings writer, .zshrc writer, home activation).

Dry-run testing

• Use the provided dry-run script to simulate what activation would do without touching your real home:

  ./scripts/test-activation-dryrun.sh

If you want any additional commands in the Justfile or a CI-friendly test harness, tell me which commands you'd like and I'll add them.