firefox-syncserver: init

flake.nix

@@ -105,7 +105,19 @@
 
       service_configs = import ./service-configs.nix;
 
-      pkgs = import nixpkgs {
+      # Bootstrap pkgs used only to apply patches to nixpkgs source.
+      bootstrapPkgs = import nixpkgs { inherit system; };
+
+      # Patch nixpkgs to add PostgreSQL backend support for firefox-syncserver.
+      patchedNixpkgsSrc = bootstrapPkgs.applyPatches {
+        name = "nixpkgs-patched";
+        src = nixpkgs;
+        patches = [
+          ./patches/0001-firefox-syncserver-add-postgresql-backend-support.patch
+        ];
+      };
+
+      pkgs = import patchedNixpkgsSrc {
         inherit system;
         targetPlatform = system;
         buildPlatform = builtins.currentSystem;
@@ -157,10 +169,21 @@
           ./disk-config.nix
           ./configuration.nix
 
+          # Replace upstream firefox-syncserver module + package with patched
+          # versions that add PostgreSQL backend support.
           {
+            disabledModules = [ "services/networking/firefox-syncserver.nix" ];
+            imports = [
+              "${patchedNixpkgsSrc}/nixos/modules/services/networking/firefox-syncserver.nix"
+            ];
             nixpkgs.overlays = [
               nix-minecraft.overlay
               (import ./modules/overlays.nix)
+              (_final: prev: {
+                syncstorage-rs =
+                  prev.callPackage "${patchedNixpkgsSrc}/pkgs/by-name/sy/syncstorage-rs/package.nix"
+                    { };
+              })
             ];
             nixpkgs.config.allowUnfreePredicate =
               pkg: