Makefile.dev

nix/develop/local:
	nix develop --extra-experimental-features nix-command --extra-experimental-features flakes

nix/develop/remote:
	nix develop --extra-experimental-features nix-command --extra-experimental-features flakes --refresh github:ottowhite/nix-dev#default --command echo "Configuration synchronized"

update:
	nix flake update

# Which homeConfiguration to build. Override on the CLI for other machines, e.g.
#   make -f Makefile.dev cold-build CONFIG='otto@nixos'
CONFIG ?= ow20@server
NIXFLAGS := --extra-experimental-features 'nix-command flakes'

# Measure a true cold bootstrap: build the config into a fresh, empty chroot
# store so nothing already on this machine counts as cached. --refresh also
# forces a cold flake eval. Everything is re-fetched from cache.nixos.org (or
# built locally), timed, then the throwaway store is removed on exit. Your real
# /nix/store and active generation are left untouched.
.PHONY: cold-build
cold-build:
	@STORE=$$(mktemp -d); \
	echo ">>> Cold build of .#$(CONFIG) into throwaway store $$STORE"; \
	trap 'chmod -R u+w "$$STORE" 2>/dev/null; rm -rf "$$STORE"' EXIT INT TERM; \
	start=$$(date +%s); \
	nix build $(NIXFLAGS) --refresh --store "$$STORE" \
	  ".#homeConfigurations.\"$(CONFIG)\".activationPackage"; \
	end=$$(date +%s); \
	echo ">>> Cold build wall-clock: $$((end - start))s"

# Timed breakdown of the cold build: attributes wall-clock to eval / download /
# local-build phases and lists the slowest downloads and derivations, using
# nix's internal-json log. Same throwaway-store approach as cold-build, so it
# leaves your real store untouched.
.PHONY: cold-build-breakdown
cold-build-breakdown:
	@python3 $(dir $(lastword $(MAKEFILE_LIST)))cold-build-profile.py '$(CONFIG)'

# test -n "$NIX_GCROOT" || nix develop --extra-experimental-features nix-command --extra-experimental-features flakes --refresh github:ottowhite/nix-dev#default --command echo "Configuration synchronized"