Add Nix flakes

flake.nix

@@ -0,0 +1,97 @@
+{
+  description = "Submission server/infrastructure for the SRS challenge at FIC";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+
+  inputs.flake-compat = {
+    url = "github:edolstra/flake-compat";
+    flake = false;
+  };
+
+  outputs = { self, nixpkgs, ... }:
+    let
+
+      # Generate a version based on date
+      version = builtins.substring 0 12 self.lastModifiedDate;
+      vendorSha256 = "sha256-MMOEZ/DcRKulNAgGsZi5pm0cXQnNgGkeqIVSC98pm9c=";
+
+      # System types to support.
+      supportedSystems =
+        [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" "arm-linux" ];
+
+      # 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 {
+
+      # Provide some binary packages for selected system types.
+      packages = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system};
+        in {
+          fic-admin = pkgs.buildGoModule {
+            pname = "admin";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "admin" ];
+          };
+
+          fic-backend = pkgs.buildGoModule {
+            pname = "backend";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "backend" ];
+          };
+
+          fic-dashboard = pkgs.buildGoModule {
+            pname = "dashboard";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "dashboard" ];
+          };
+
+          fic-frontend = pkgs.buildGoModule {
+            pname = "frontend";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "frontend" ];
+          };
+
+          fic-qa = pkgs.buildGoModule {
+            pname = "qa";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "qa" ];
+          };
+
+          fic-remote-scores-sync-zqds = pkgs.buildGoModule {
+            pname = "scores-sync-zqds";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "remote/scores-sync-zqds" ];
+          };
+
+          fic-repochecker = pkgs.buildGoModule {
+            pname = "repochecker";
+            inherit version vendorSha256;
+            src = ./.;
+
+            subPackages = [ "repochecker" ];
+          };
+        });
+
+      devShell = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system};
+        in pkgs.mkShell {
+          buildInputs = with pkgs; [ go ];
+        });
+    };
+}