From b51bea50371cc7a98863fb64bf1aaa1126a68a36 Mon Sep 17 00:00:00 2001
From: Andrea Ciceri <andrea.ciceri@autistici.org>
Date: Fri, 15 Jul 2022 01:09:50 +0200
Subject: [PATCH] Jobsets for cross building emacsen (#231)

* Jobsets for cross building emacsen

* hydra: bump to nixos-22.05
---
 hydra/default.nix       | 12 ++++++++++++
 hydra/emacsen-cross.nix | 25 +++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 hydra/emacsen-cross.nix

diff --git a/hydra/default.nix b/hydra/default.nix
index 977e8b0c0..97d015f8e 100644
--- a/hydra/default.nix
+++ b/hydra/default.nix
@@ -46,6 +46,18 @@ let
       descriptionNote = "emacs";
     };
 
+    unstable-cross = mkJobset {
+      nixpkgsRelease = "nixos-unstable";
+      nixFile = "emacsen-cross.nix";
+      descriptionNote = "emacs cross builds";
+    };
+
+    stable-cross = mkJobset {
+      nixpkgsRelease = "nixos-22.05";
+      nixFile = "emacsen-cross.nix";
+      descriptionNote = "emacs cross builds";
+    };
+
     unstable-pkgs = mkJobset {
       nixpkgsRelease = "nixos-unstable";
       nixFile = "packages.nix";
diff --git a/hydra/emacsen-cross.nix b/hydra/emacsen-cross.nix
new file mode 100644
index 000000000..a3be23ab2
--- /dev/null
+++ b/hydra/emacsen-cross.nix
@@ -0,0 +1,25 @@
+{ nixpkgs }:
+let
+  crossTargets = [ "aarch64-multiplatform" ];
+  pkgs = import nixpkgs {
+    overlays = [
+      (import ../default.nix)
+    ];
+  };
+  inherit (pkgs) lib;
+in
+lib.fold lib.recursiveUpdate { }
+  (builtins.map
+    (target:
+      let
+        targetPkgs = pkgs.pkgsCross.${target};
+      in
+      lib.mapAttrs' (name: job: lib.nameValuePair "${name}-${target}" job)
+        ({
+          inherit (targetPkgs) emacsUnstable emacsUnstable-nox;
+          inherit (targetPkgs) emacsGit emacsGit-nox;
+          inherit (targetPkgs) emacsPgtk;
+        } // lib.optionalAttrs (lib.hasAttr "libgccjit" targetPkgs) {
+          inherit (targetPkgs) emacsNativeComp emacsGitNativeComp emacsPgtkNativeComp;
+        }))
+    crossTargets)