feat: nix

Signed-off-by: jolheiser <john.olheiser@gmail.com>

.gitignore

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+/cfg
+result/

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1717786204,
+        "narHash": "sha256-4q0s6m0GUcN7q+Y2DqD27iLvbcd1G50T2lv08kKxkSI=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "051f920625ab5aabe37c920346e3e69d7d34400e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "cfg";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    systems = [
+      "aarch64-darwin"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "x86_64-linux"
+    ];
+    inherit (nixpkgs) lib;
+    forEachSystem = f: (lib.listToAttrs (
+      map (system: {
+        name = system;
+        value = f {
+          inherit system;
+          pkgs = import nixpkgs {
+            inherit system;
+          };
+        };
+      })
+      systems
+    ));
+  in {
+    packages = forEachSystem ({
+      pkgs,
+      system,
+    }: {
+      default = self.packages.${system}.cfg;
+      cfg = pkgs.buildGoModule rec {
+        pname = "cfg";
+        version = self.rev or "dev";
+        src = pkgs.nix-gitignore.gitignoreSource [] (builtins.path {
+          name = pname;
+          path = ./.;
+        });
+        subPackages = ["cmd/cfg"];
+        vendorHash = nixpkgs.lib.fileContents ./go.mod.sri;
+        meta = {
+          description = "config transpiler";
+          homepage = "https://git.jolheiser.com/cfg";
+          mainProgram = "cfg";
+        };
+      };
+    });
+  };
+}

go.mod.sri

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+sha256-IKdsBsOJ41qh/d2ZxgkY0IihIGieYlTtdHRmFufS+yQ=