Switch to using nix flakes, and update go to a real version

README.md

@@ -6,18 +6,16 @@ super-early-alpha-don't-actually-use-this-for-anything development.
 ## Development
 
 Current efforts on ginger are focused on a golang-based virtual machine, which
-will then be used to bootstrap the language. go >=1.18 is required for this vm.
+will then be used to bootstrap the language.
 
-If you are on a linux-amd64 machine with nix installed, you can run:
+If you are on a machine with nix installed, you can run:
 
 ```
-nix-shell -A shell
+nix develop
 ```
 
 from the repo root and you will be dropped into a shell with all dependencies
-(including the correct go version) in your PATH, ready to use. This could
+(including the correct go version) in your PATH, ready to use.
-probably be expanded to other OSs/architectures easily, if you care to do so
-please check out the `default.nix` file and submit a PR!
 
 ## Demo
 

default.nix

@@ -1,25 +0,0 @@
-{
-
-    pkgs ? import (fetchTarball {
-        name = "nixpkgs-21-11";
-        url = "https://github.com/NixOS/nixpkgs/archive/a7ecde854aee5c4c7cd6177f54a99d2c1ff28a31.tar.gz";
-        sha256 = "162dywda2dvfj1248afxc45kcrg83appjd0nmdb541hl7rnncf02";
-    }) { },
-
-}: rec {
-
-  # https://go.dev/dl/#go1.18beta1
-  go = fetchTarball {
-    name = "go1.18beta1";
-    url = "https://go.dev/dl/go1.18beta1.linux-amd64.tar.gz";
-    sha256 = "09sb0viv1ybx6adgx4jym1sckdq3mpjkd6albj06hwnchj5rqn40";
-  };
-
-  shell = pkgs.mkShell {
-    name = "ginger-dev";
-    buildInputs = [
-      go
-    ];
-  };
-
-}

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1696983906,
+        "narHash": "sha256-L7GyeErguS7Pg4h8nK0wGlcUTbfUMDu+HMf1UcyP72k=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "bd1cde45c77891214131cbbea5b1203e485a9d51",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-23.05",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,44 @@
+{
+  description = "gotc development environment";
+
+  # Nixpkgs / NixOS version to use.
+  inputs.nixpkgs.url = "nixpkgs/nixos-23.05";
+
+  outputs = { self, nixpkgs }:
+    let
+
+      # to work with older version of flakes
+      lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";
+
+      # Generate a user-friendly version number.
+      version = builtins.substring 0 8 lastModifiedDate;
+
+      # System types to support.
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+
+      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+
+      # Nixpkgs instantiated for supported system types.
+      nixpkgsFor = forAllSystems (system: import nixpkgs {
+        inherit system;
+      });
+
+    in
+    {
+
+      # Add dependencies that are only needed for development
+      devShells = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in {
+          default = pkgs.mkShell {
+            buildInputs = [
+              pkgs.go
+              pkgs.gotools
+              pkgs.golangci-lint
+            ];
+          };
+        });
+    };
+}