Add support for MacOS build on Nix

.github/workflows/macos.yaml

@@ -0,0 +1,31 @@
+name: MacOS Build
+on:
+  pull_request: {}
+  push:
+    tags:
+      - v[0-9]+.*
+    branches:
+      - "release/*"
+      - main
+
+jobs:
+  test-contracts:
+    name: Build MacOS Nix dependencies
+    runs-on: macos-14
+    timeout-minutes: 60
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@V27
+        with:
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v15
+        with:
+          name: ibc-starknet
+          extraPullNames: hermes-sdk,cosmos-nix
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: Run Nix build
+        run: |
+          sudo rm -rf /opt/homebrew
+          nix develop -c true

flake.nix

@@ -108,7 +108,6 @@
 
           tools = {
             inherit (nixpkgs)
-              pkg-config
               protobuf
               cargo-nextest
               taplo
@@ -118,7 +117,12 @@
             nixfmt = nixpkgs.nixfmt-rfc-style;
           };
 
-          shell-deps = (builtins.attrValues starknet-pkgs) ++ (builtins.attrValues tools);
+          mac-deps = nixpkgs.lib.optional nixpkgs.stdenv.isDarwin [
+            nixpkgs.libiconv
+            nixpkgs.darwin.apple_sdk.frameworks.SystemConfiguration
+          ];
+
+          shell-deps = (builtins.attrValues starknet-pkgs) ++ (builtins.attrValues tools) ++ mac-deps;
         in
         {
           packages = {

nix/cairo.nix

@@ -13,7 +13,13 @@ let
     OPENSSL_NO_VENDOR = 1;
     PKG_CONFIG_PATH = "${nixpkgs.openssl.dev}/lib/pkgconfig";
 
-    nativeBuildInputs = [ nixpkgs.pkg-config ];
+    nativeBuildInputs = [
+      nixpkgs.pkg-config
+    ];
+
+    buildInputs = nixpkgs.lib.optionals nixpkgs.stdenv.isDarwin [
+      nixpkgs.darwin.apple_sdk.frameworks.SystemConfiguration
+    ];
   };
 in
 cairo

nix/scarb.nix

@@ -15,6 +15,10 @@ let
     cargoHash = "sha256-cAEwCX1zGJu4+ufdVSqBbksa1FLZWVNt2TLZ5JlGISk=";
 
     SCARB_CORELIB_LOCAL_PATH = cairo-src + "/corelib";
+
+    buildInputs = nixpkgs.lib.optionals nixpkgs.stdenv.isDarwin [
+      nixpkgs.darwin.apple_sdk.frameworks.SystemConfiguration
+    ];
   };
 in
 cairo

nix/snforge.nix

@@ -14,12 +14,16 @@ let
       };
     };
 
+    doCheck = false;
+
     OPENSSL_NO_VENDOR = 1;
     PKG_CONFIG_PATH = "${nixpkgs.openssl.dev}/lib/pkgconfig";
 
     nativeBuildInputs = [ nixpkgs.pkg-config ];
 
-    doCheck = false;
+    buildInputs = nixpkgs.lib.optionals nixpkgs.stdenv.isDarwin [
+      nixpkgs.darwin.apple_sdk.frameworks.SystemConfiguration
+    ];
   };
 in
 snforge

nix/starknet-devnet.nix

@@ -17,12 +17,16 @@ let
       lockFile = starknet-devnet-src + "/Cargo.lock";
     };
 
+    doCheck = false;
+
     OPENSSL_NO_VENDOR = 1;
     PKG_CONFIG_PATH = "${nixpkgs.openssl.dev}/lib/pkgconfig";
 
     nativeBuildInputs = [ nixpkgs.pkg-config ];
 
-    doCheck = false;
+    buildInputs = nixpkgs.lib.optionals nixpkgs.stdenv.isDarwin [
+      nixpkgs.darwin.apple_sdk.frameworks.SystemConfiguration
+    ];
   };
 in
 starknet-devnet