flake.nix: init

default.nix

@@ -5,13 +5,15 @@ in
  system ? builtins.currentSystem,
  nixpkgs ? sources.nixpkgs,
  treefmt-nix ? sources.treefmt-nix,
+ pkgs ? (
+ import nixpkgs {
+ inherit system;
+ config = { };
+ overlays = [ ];
+ }
+ ),
 }:
 let
- pkgs = import nixpkgs {
- inherit system;
- config = { };
- overlays = [ ];
- };
  inherit (pkgs) lib;
 
  runtimeExprPath = ./src/eval.nix;
@@ -79,10 +81,30 @@ let
  }
  );
 
+ # Fits in with `nix fmt`.
+ treefmtWrapper = treefmtEval.config.build.wrapper;
+
  # Run regularly by CI and turned into a PR
  autoPrUpdate =
  let
  updateScripts = {
+ flake = pkgs.writeShellApplication {
+ name = "update-flake";
+ runtimeInputs = with pkgs; [
+ git
+ nix
+ ];
+ text = ''
+ echo "<details><summary>flake.nix changes</summary>"
+ # Needed because GitHub's rendering of the first body line breaks down otherwise
+ echo ""
+ echo '```'
+ cd "$1"
+ nix flake update 2>&1
+ echo '```'
+ echo "</details>"
+ '';
+ };
  npins = pkgs.writeShellApplication {
  name = "update-npins";
  runtimeInputs = with pkgs; [ npins ];
@@ -91,7 +113,7 @@ let
  # Needed because GitHub's rendering of the first body line breaks down otherwise
  echo ""
  echo '```'
- npins update --directory "$1/npins" 2>&1
+ npins --directory "$1/npins" import-flake 2>&1
  echo '```'
  echo "</details>"
  '';

flake.nix

@@ -0,0 +1,52 @@
+{
+ description = "nixpkgs-check-by-name: a linter for nixpkgs";
+
+ inputs = {
+ nixpkgs.url = "github:nixos/nixpkgs";
+ treefmt-nix.url = "github:numtide/treefmt-nix";
+ treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
+ };
+
+ outputs =
+ {
+ self,
+ nixpkgs,
+ treefmt-nix,
+ }:
+ let
+ # Until https://github.com/NixOS/nixpkgs/pull/295083 is accepted and merged.
+ systems = [
+ "x86_64-linux"
+ "aarch64-linux"
+ "x86_64-darwin"
+ "aarch64-darwin"
+ ];
+ eachSystem =
+ f:
+ nixpkgs.lib.genAttrs systems (
+ system:
+ f (
+ import ./default.nix {
+ inherit nixpkgs system treefmt-nix;
+ pkgs = nixpkgs.legacyPackages.${system};
+ }
+ )
+ );
+ in
+ {
+ packages = eachSystem (this: {
+ default = this.build;
+ });
+
+ devShells = eachSystem (this: {
+ default = this.shell;
+ });
+
+ checks = eachSystem (this: {
+ formatting = this.treefmt;
+ nixpkgs = this.nixpkgsCheck;
+ });
+
+ formatter = eachSystem (this: this.treefmtWrapper);
+ };
+}