From 272de1a114380fb839bb662c77c93c65a0231d38 Mon Sep 17 00:00:00 2001
From: NotAShelf <raf@notashelf.dev>
Date: Sat, 14 Jun 2025 12:30:06 +0300
Subject: [PATCH] flake: export smfh package as an output

---
 flake.nix | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/flake.nix b/flake.nix
index ffaedf6..d937983 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,6 +12,9 @@
     nixpkgs,
     ...
   } @ inputs: let
+    # We should only specify the modules Hjem explicitly supports, or we risk
+    # allowing not-so-defined behaviour. For example, adding nix-systems should
+    # be avoided, because it allows specifying Hjem is not tested on.
     forAllSystems = nixpkgs.lib.genAttrs ["x86_64-linux" "aarch64-linux"];
   in {
     nixosModules = {
@@ -19,18 +22,27 @@
       default = self.nixosModules.hjem;
     };
 
+    packages = forAllSystems (system: {
+      # Expose the 'smfh' instance used by Hjem as a package in the Hjem flake
+      # outputs. This allows consuming the exact copy of smfh used by Hjem.
+      smfh = inputs.smfh.packages.${system}.smfh;
+    });
+
     checks = forAllSystems (system: let
       checkArgs = {
         inherit self inputs;
         pkgs = nixpkgs.legacyPackages.${system};
       };
     in {
+      # Build the 'smfh' package as a part of Hjem's test suite.
+      # If 'nix flake check' is ran in the CI, this might inflate build times
+      # *a lot*.
+      inherit (self.packages.${system}) smfh;
+
+      # Hjem Integration Tests
       hjem-basic = import ./tests/basic.nix checkArgs;
       hjem-special-args = import ./tests/special-args.nix checkArgs;
       hjem-linker = import ./tests/linker.nix checkArgs;
-
-      # Build smfh as a part of 'nix flake check'
-      smfh = inputs.smfh.packages.${system}.smfh;
     });
 
     devShells = forAllSystems (system: let