flake: rewrite to use flake-parts

shell/default.nix

@@ -1,6 +1,24 @@
-{ self, inputs, ... }:
+{ self, lib, ... }:
+
 {
-  exportedModules = [
-    ./devos.nix
-  ];
+  perSystem = { pkgs, ... }: {
+    devshells.default =
+      let
+        pythonEnv = (pkgs.python310.withPackages (p: with p; [
+          pkgs.qtile.passthru.unwrapped
+        ]));
+      in
+      {
+        devshell.packages = [
+          pythonEnv
+        ];
+
+        env = [
+          {
+            name = "PYTHONPATH";
+            value = "${pythonEnv}/${pythonEnv.sitePackages}";
+          }
+        ];
+      };
+  };
 }

shell/devos.nix

@@ -1,67 +0,0 @@
-{ pkgs, extraModulesPath, inputs, ... }:
-let
-
-  hooks = import ./hooks;
-
-  pkgWithCategory = category: package: { inherit package category; };
-  linter = pkgWithCategory "linter";
-  docs = pkgWithCategory "docs";
-  devos = pkgWithCategory "devos";
-
-  pythonEnv = pkgs.python310.withPackages (p: with p; [
-    pkgs.qtile.passthru.unwrapped
-  ]);
-in
-{
-  _file = toString ./.;
-
-  imports = [ "${extraModulesPath}/git/hooks.nix" ];
-  git = { inherit hooks; };
-
-  # tempfix: remove when merged https://github.com/numtide/devshell/pull/123
-  devshell.startup.load_profiles = pkgs.lib.mkForce (pkgs.lib.noDepEntry ''
-    # PATH is devshell's exorbitant privilige:
-    # fence against its pollution
-    _PATH=''${PATH}
-    # Load installed profiles
-    for file in "$DEVSHELL_DIR/etc/profile.d/"*.sh; do
-      # If that folder doesn't exist, bash loves to return the whole glob
-      [[ -f "$file" ]] && source "$file"
-    done
-    # Exert exorbitant privilige and leave no trace
-    export PATH=''${_PATH}
-    unset _PATH
-  '');
-
-  devshell.packages = [
-    pythonEnv
-  ];
-
-  commands = with pkgs; [
-    (devos nixUnstable)
-    (devos agenix)
-    {
-      category = "devos";
-      name = pkgs.nvfetcher.pname;
-      help = pkgs.nvfetcher.meta.description;
-      command = "cd $PRJ_ROOT/pkgs; ${pkgs.nvfetcher}/bin/nvfetcher -c ./sources.toml $@";
-    }
-    (linter nixpkgs-fmt)
-    (linter editorconfig-checker)
-    # (docs python3Packages.grip) too many deps
-    (docs mdbook)
-  ]
-
-  ++ lib.optional
-    (system != "i686-linux")
-    (devos cachix)
-
-  ;
-
-  env = [
-    {
-      name = "PYTHONPATH";
-      value = "${pythonEnv}/${pythonEnv.sitePackages}";
-    }
-  ];
-}

shell/hooks/default.nix

@@ -1,4 +0,0 @@
-{
-  enable = true;
-  pre-commit.text = builtins.readFile ./pre-commit.sh;
-}

shell/hooks/pre-commit.sh

@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-
-if git rev-parse --verify HEAD >/dev/null 2>&1
-then
-  against=HEAD
-else
-  # Initial commit: diff against an empty tree object
-  against=$(${git}/bin/git hash-object -t tree /dev/null)
-fi
-
-diff="git diff-index --name-only --cached $against --diff-filter d"
-
-nix_files=($($diff -- '*.nix'))
-all_files=($($diff))
-
-# Format staged nix files.
-if [[ -n "${nix_files[@]}" ]]; then
-  nixpkgs-fmt "${nix_files[@]}" \
-  && git add "${nix_files[@]}"
-fi
-
-# check editorconfig
-editorconfig-checker -- "${all_files[@]}"
-if [[ $? != '0' ]]; then
-  printf "%b\n" \
-    "\nCode is not aligned with .editorconfig" \
-    "Review the output and commit your fixes" >&2
-  exit 1
-fi