Flakes, but it doesn't work 😞

configurations/direnv.nix

@@ -5,21 +5,22 @@
     { path = ".local/share/direnv"; type = "cache"; }
   ];
 
-  nix.extraOptions = ''
-    keep-outputs = true
-    keep-derivations = true
-  '';
-
   home-manager.users.charlotte = { ... }: {
     programs.direnv = {
       enable = true;
-      enableNixDirenvIntegration = true;
       enableZshIntegration = true;
       config = {
         global = {
           strict_env = true;
         };
       };
+      stdlib = ''
+        use_flake() {
+          watch_file flake.nix
+          watch_file flake.lock
+          eval "$(nix --experimental-features 'nix-commnand flakes' print-dev-env --profile "$(direnv_layout_dir)/flake-profile")"
+        }
+      '';
     };
   };
 }

configurations/nix-store.nix

@@ -1,7 +1,11 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   nix = {
+    extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+    package = pkgs.nixFlakes;
     gc = {
       automatic = true;
       dates = "hourly";

flake.lock

@@ -0,0 +1,67 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1595332686,
+        "narHash": "sha256-GpzwLOx6fvtsAnjPqG0ob5GXR0e4eWThwgWedo3qeNc=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f99f5970824e210e84f9a766e2ea52d4af770182",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "ref": "master",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1594886249,
+        "narHash": "sha256-Z2REbQYsYBrdWc6Dz9MmtSReaanIMoJmmnUXNeQHaJY=",
+        "owner": "ehmry",
+        "repo": "home-manager",
+        "rev": "24f437c263207e22147f50e59c879078a58b17ba",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ehmry",
+        "ref": "flake",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1595363904,
+        "narHash": "sha256-p53BaxRE1FPqdOqVtj3e8dtygME6JzNtJPXYFGb9EPQ=",
+        "ref": "master",
+        "rev": "4da6ffdfb1ee6aaf93c379507dab543091a5536c",
+        "revCount": 235509,
+        "type": "git",
+        "url": "file:///data/home/charlotte/repos/nixpkgs"
+      },
+      "original": {
+        "owner": "charvp",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "Nixos configuration flake";
+
+  inputs = {
+    nixpkgs = { url = "github:charvp/nixpkgs/master"; };
+    home-manager = {
+      url = "github:ehmry/home-manager/flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils = { url = "github:numtide/flake-utils/master"; };
+  };
+
+  outputs = { self, nixpkgs, home-manager, flake-utils }:
+    let
+      pkgsFor = system: import nixpkgs {
+        inherit system;
+        config = { allowUnfree = true; };
+      };
+      mkSystem = system: hostname: nixpkgs.lib.nixosSystem {
+        inherit system;
+        modules = [
+          home-manager.nixosModules.home-manager
+          (./. + "/machines/${hostname}")
+        ];
+      };
+    in
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = pkgsFor system;
+      in
+      {
+        devShell = pkgs.mkShell {
+          buildInputs = with nixpkgs.legacyPackages.${system}; [
+            jq
+            nixUnstable
+            nixpkgs-fmt
+          ];
+        };
+      }) // {
+      nixosConfigurations = {
+        kharbranth = mkSystem "x86_64-linux" "kharbranth";
+        kholinar = mkSystem "x86_64-linux" "kholinar";
+      };
+    };
+}

imports/home-manager/default.nix

@@ -1,7 +0,0 @@
-let
-  metadata = import ./metadata.nix;
-in
-builtins.fetchTarball {
-  url = "https://github.com/rycee/home-manager/archive/${metadata.rev}.tar.gz";
-  sha256 = metadata.sha256;
-}

imports/home-manager/metadata.nix

@@ -1,9 +0,0 @@
-{
-  url = "https://github.com/rycee/home-manager/archive/master.tar.gz";
-  repo_git = "https://github.com/rycee/home-manager";
-  branch = "master";
-  rev = "8ad55800216760291e253150a7ecc831c2956229";
-  sha256 = "0nif0a2pv5wgyjhfqd8jmlc055y0604xmqfnnr2hfrzz0blpl4ww";
-  revdate = "2020-07-21 01:10:54 +0200";
-  skip = false;
-}

imports/nixpkgs/default.nix

@@ -1,7 +0,0 @@
-let
-  metadata = import ./metadata.nix;
-in
-builtins.fetchTarball {
-  url = "https://github.com/charvp/nixpkgs/archive/${metadata.rev}.tar.gz";
-  sha256 = metadata.sha256;
-}

imports/nixpkgs/metadata.nix

@@ -1,9 +0,0 @@
-{
-  url = "https://github.com/charvp/nixpkgs/archive/master.tar.gz";
-  repo_git = "https://github.com/charvp/nixpkgs";
-  branch = "master";
-  rev = "1cab31c02385445cd86b2930201f02708fe504d9";
-  sha256 = "1c2wm4wyrswi61bfrb7yyv2025xg31shs7h1l0662vkjmd58vjaf";
-  revdate = "2020-07-21 09:11:54 +0200";
-  skip = false;
-}

lib.nix

@@ -1,25 +0,0 @@
-{
-  findImport = name:
-    let
-      localpath = ./.. + "/${name}";
-      importpath = ./imports + "/${name}";
-    in
-    if builtins.pathExists localpath then
-      localpath
-    else if builtins.pathExists importpath then
-      (import importpath)
-    else (abort "couldn't find import ${name}");
-
-  mkSystem = { nixpkgs, system ? "x86_64-linux", rev ? "git", extraModules ? [ ], ... }:
-    let
-      machine = import "${nixpkgs}/nixos/lib/eval-config.nix" {
-        inherit system;
-        modules = [
-          ({ ... }: {
-            nix.nixPath = [ "nixpkgs=${nixpkgs}" ];
-          })
-        ] ++ extraModules;
-      };
-    in
-    machine;
-}

machines/kharbranth/configuration.nix

@@ -1,40 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  imports = [
-    ./hardware.nix
-    ./secret.nix
-    ../../configurations/eid.nix
-    ../../profiles/bluetooth.nix
-    ../../profiles/common.nix
-    ../../profiles/graphical.nix
-  ];
-
-  networking = {
-    hostId = "e718389d";
-    hostName = "kharbranth";
-  };
-
-  time.timeZone = "Europe/Brussels";
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "20.09";
-
-  home-manager.users.charlotte = { ... }: {
-    home.stateVersion = "20.09";
-  };
-
-  # Machine-specific application settings
-  custom = {
-    git.email = "charlotte.vanpetegem@ugent.be";
-    zfs = {
-      enable = true;
-      encrypted = true;
-    };
-  };
-}

machines/kharbranth/default.nix

@@ -1,9 +1,40 @@
-let
+{ config, pkgs, ... }:
-  lib = import ../../lib.nix;
+
-  system = lib.mkSystem {
+{
-    nixpkgs = (lib.findImport "nixpkgs");
+  imports = [
-    extraModules = [ ./configuration.nix ];
+    ./hardware.nix
-    system = "x86_64-linux";
+    ./secret.nix
+    ../../configurations/eid.nix
+    ../../profiles/bluetooth.nix
+    ../../profiles/common.nix
+    ../../profiles/graphical.nix
+  ];
+
+  networking = {
+    hostId = "e718389d";
+    hostName = "kharbranth";
   };
-in
+
-system.config.system.build.toplevel
+  time.timeZone = "Europe/Brussels";
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "20.09";
+
+  home-manager.users.charlotte = { ... }: {
+    home.stateVersion = "20.09";
+  };
+
+  # Machine-specific application settings
+  custom = {
+    git.email = "charlotte.vanpetegem@ugent.be";
+    zfs = {
+      enable = true;
+      encrypted = true;
+    };
+  };
+}

machines/kholinar/configuration.nix

@@ -1,40 +0,0 @@
-{ pkgs, lib, ... }:
-
-{
-  imports = [
-    ./hardware.nix
-    ./secret.nix
-    ../../configurations/eid.nix
-    ../../profiles/bluetooth.nix
-    ../../profiles/common.nix
-    ../../profiles/graphical.nix
-  ];
-
-  networking = {
-    hostId = "3cc1a4b2";
-    hostName = "kholinar";
-  };
-
-  time.timeZone = "Europe/Brussels";
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "20.09";
-
-  home-manager.users.charlotte = { ... }: {
-    home.stateVersion = "20.09";
-  };
-
-  # Machine-specific settings
-  custom = {
-    git.email = "charlotte@vanpetegem.me";
-    zfs = {
-      enable = true;
-      encrypted = true;
-    };
-  };
-}

machines/kholinar/default.nix

@@ -1,9 +1,40 @@
-let
+{ pkgs, lib, ... }:
-  lib = import ../../lib.nix;
+
-  system = lib.mkSystem {
+{
-    nixpkgs = (lib.findImport "nixpkgs");
+  imports = [
-    extraModules = [ ./configuration.nix ];
+    ./hardware.nix
-    system = "x86_64-linux";
+    ./secret.nix
+    ../../configurations/eid.nix
+    ../../profiles/bluetooth.nix
+    ../../profiles/common.nix
+    ../../profiles/graphical.nix
+  ];
+
+  networking = {
+    hostId = "3cc1a4b2";
+    hostName = "kholinar";
   };
-in
+
-system.config.system.build.toplevel
+  time.timeZone = "Europe/Brussels";
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "20.09";
+
+  home-manager.users.charlotte = { ... }: {
+    home.stateVersion = "20.09";
+  };
+
+  # Machine-specific settings
+  custom = {
+    git.email = "charlotte@vanpetegem.me";
+    zfs = {
+      enable = true;
+      encrypted = true;
+    };
+  };
+}

profiles/common.nix

@@ -1,11 +1,7 @@
 { pkgs, ... }:
-let
+
-  findImport = (import ../lib.nix).findImport;
-  home-manager = findImport "home-manager";
-in
 {
   imports = [
-    "${home-manager}/nixos"
     ../modules/zfs.nix
     ../configurations/direnv.nix
     ../configurations/git.nix

shells/nix.nix

@@ -1,9 +1,3 @@
-let
+(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
-  pkgs = import <nixpkgs> { };
+  src = ./.;
-in
+}).shellNix
-pkgs.mkShell {
-  buildInputs = with pkgs; [
-    jq
-    nixpkgs-fmt
-  ];
-}

update-imports.sh

@@ -1,46 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-set -x
-
-export NIX_PATH="nixpkgs=https://github.com/nixos/nixpkgs/archive/nixos-unstable.tar.gz"
-
-function update() {
-  pkg="${1}"
-
-  metadata="${pkg}/metadata.nix"
-  pkgname="$(basename "${pkg}")"
-
-  branch="$(nix-instantiate "${metadata}" --eval --json -A branch | jq -r .)"
-  rev="$(nix-instantiate "${metadata}" --eval --json -A rev | jq -r .)"
-  date="$(nix-instantiate "${metadata}" --eval --json -A revdate | jq -r .)"
-  sha256="$(nix-instantiate "${metadata}" --eval --json -A sha256 | jq -r .)"
-  url="$(nix-instantiate "${metadata}" --eval --json -A url | jq -r .)"
-  skip="$(nix-instantiate "${metadata}" --eval --json -A skip || echo "false" | jq -r .)"
-
-  newdate="${date}"
-  if [[ "${skip}" != "true" ]]; then
-    repo="$(nix-instantiate "${metadata}" --eval --json -A repo_git | jq -r .)"
-    newrev="$(git ls-remote "${repo}" "${branch}" | awk '{ print $1}')"
-
-    if [[ "${rev}" != "${newrev}" ]]; then
-      # Update RevDate
-      d="$(mktemp -d)"
-      git clone -b "${branch}" --single-branch --depth=1 "${repo}" "${d}"
-      newdate="$(cd "${d}"; git log --format=%ci --max-count=1)"
-      rm -rf "${d}"
-
-      # Update Sha256
-      newsha256="$(nix-prefetch-url --unpack "${url}")"
-
-      # TODO: do this with nix instead of sed?
-      sed -i "s/${rev}/${newrev}/" "${metadata}"
-      sed -i "s/${date}/${newdate}/" "${metadata}"
-      sed -i "s/${sha256}/${newsha256}/" "${metadata}"
-    fi
-  fi
-}
-
-for p in imports/*; do
-  update "${p}"
-done