From a0b001576b42f25d8100240809a3f7d05130774f Mon Sep 17 00:00:00 2001
From: 778a69cd <778a69cd@potsda.mn>
Date: Mon, 6 Nov 2023 17:56:12 +0100
Subject: [PATCH] make flake generic over platform

---
 flake.nix | 92 +++++++++++++++++++++++++++++++------------------------
 1 file changed, 52 insertions(+), 40 deletions(-)

diff --git a/flake.nix b/flake.nix
index 2b063beae..2ef39c184 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,56 +8,69 @@
 
   outputs = { self, nixpkgs, nix-filter }:
     let
-      system = "x86_64-linux";
-      pkgs = import nixpkgs { inherit system; };
+      forAllSystems = f: nixpkgs.lib.genAttrs
+        [ "x86_64-linux" "aarch64-linux" ]
+        (system: f system);
+      nixpkgsFor = forAllSystems (
+        system:
+        import nixpkgs { inherit system; }
+      );
       filter = nix-filter.lib;
     in
     {
 
-      packages.x86_64-linux = {
-        mobilizon = pkgs.callPackage ./. {
-          src = filter {
-            root = ./.;
-            exclude = [
-              (filter.matchExt "nix")
-              "js"
-            ];
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          mobilizon = pkgs.callPackage ./. {
+            src = filter {
+              root = ./.;
+              exclude = [
+                (filter.matchExt "nix")
+                "js"
+              ];
+            };
+            src-config = ./config;
+            mobilizon-js = self.packages.x86_64-linux.mobilizon-frontend;
           };
-          src-config = ./config;
-          mobilizon-js = self.packages.x86_64-linux.mobilizon-frontend;
-        };
 
-        mobilizon-frontend = pkgs.callPackage ./js { inherit filter; };
+          mobilizon-frontend = pkgs.callPackage ./js { inherit filter; };
 
-        default = self.packages.x86_64-linux.mobilizon;
+          default = self.packages.x86_64-linux.mobilizon;
 
-        # Update local Mobilizon definition
-        update =
-          pkgs.writeShellScriptBin "update" ''
-            set -eou pipefail
+          # Update local Mobilizon definition
+          update =
+            pkgs.writeShellScriptBin "update" ''
+              set -eou pipefail
 
-            ${pkgs.mix2nix}/bin/mix2nix ./mix.lock > mix.nix
-          '';
-      };
+              ${pkgs.mix2nix}/bin/mix2nix ./mix.lock > mix.nix
+            '';
+        });
 
-      devShells.x86_64-linux.default =
-        pkgs.mkShell {
-          buildInputs = with pkgs; [
-            elixir
-            mix2nix
-            cmake
-            imagemagick
-            (yarn.override {
-              nodejs = nodejs-18_x;
-            })
-            yarn2nix
-            nodejs-18_x
-          ];
-        };
+      devShells = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system};
+        in {
+          default =
+            pkgs.mkShell {
+              buildInputs = with pkgs; [
+                elixir
+                mix2nix
+                cmake
+                imagemagick
+                (yarn.override {
+                  nodejs = nodejs-18_x;
+                })
+                yarn2nix
+                nodejs-18_x
+              ];
+            };
+        });
 
-      checks.x86_64-linux = {
-        inherit (self.packages.x86_64-linux) mobilizon update;
-      };
+      checks = forAllSystems (system: {
+        inherit (self.packages.${system}) mobilizon update;
+      });
 
       lib = {
         # Patch the logos in the source tree of a mobilizon-frontend package before building.
@@ -67,7 +80,6 @@
             inherit (icons) logo favicon;
           in
           old: {
-            nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ pkgs.imagemagick ];
             postPatch = ''
               cp '${logo}' src/assets/logo.svg