From ebad39adab212ab4e26f9a98befa0048c7eea710 Mon Sep 17 00:00:00 2001 From: sommerfeld Date: Wed, 13 May 2026 13:43:24 +0100 Subject: feat(nix): hybrid setup with flakes + direnv for per-project dev shells MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Install Nix (multi-user daemon) on Arch and wire up direnv so any project can declare its toolchain in a flake.nix and get a hermetic dev shell on cd. No NixOS, no home-manager, no migration off paru/chezmoi — just one new package manager scoped to project dev shells. - meta/nix.txt: nix from extra repo - meta/dev.txt: direnv (general-purpose, not nix-specific) - systemd-units/system/nix.txt: nix-daemon.socket (socket-activated) - etc/nix/nix.conf: enable flakes + nix-command, trusted-users=@wheel, auto-optimise-store, keep-outputs/derivations so direnv envs survive GC - dot_config/direnv/direnvrc: load nix-direnv 3.1.1 via source_url with pinned sha256 (not packaged for Arch; refusing -git AUR) - dot_config/nix/templates/{flake.nix,dev/}: flake template usable via 'nix flake init -t ~/.config/nix/templates' - dot_config/zsh/dot_zshrc: 'eval "$(direnv hook zsh)"' --- dot_config/direnv/direnvrc | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 dot_config/direnv/direnvrc (limited to 'dot_config/direnv/direnvrc') diff --git a/dot_config/direnv/direnvrc b/dot_config/direnv/direnvrc new file mode 100644 index 0000000..40bfc86 --- /dev/null +++ b/dot_config/direnv/direnvrc @@ -0,0 +1,14 @@ +# Global direnv runtime config. +# +# Loads nix-direnv on demand. nix-direnv is NOT packaged for Arch and we +# refuse to depend on -git AUR packages, so we fetch the loader from +# upstream pinned by version + content hash. direnv caches it under +# $XDG_CACHE_HOME/direnv/, so the network fetch happens exactly once +# per pin bump. +# +# To upgrade: bump the version in the URL and replace the sha256 with +# the new one. direnv prints the expected hash on mismatch. +if ! has nix_direnv_version || ! nix_direnv_version 3.1.1; then + source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.1.1/direnvrc" \ + "sha256-p+fzQdrms/hDa7g+soShAybJNo4bN4SIAeSfqNKgD5I=" +fi -- cgit v1.3.1