feat: initial implementation of metadata aggregator

- gRPC service with MusicBrainz provider - PostgreSQL schema with migrations - Service layer with database-first caching - Repository pattern for data access - YAML configuration support - Research documentation for 17 music metadata projects
2026-04-28 16:27:14 +02:00
commit a1f6701bac
163 changed files with 95884 additions and 0 deletions
@@ -0,0 +1,88 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    git-hooks.url = "github:cachix/git-hooks.nix";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-parts,
+      git-hooks,
+      ...
+    }@inputs:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+      ];
+
+      perSystem =
+        {
+          system,
+          ...
+        }:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+          };
+
+          pre-commit-check = git-hooks.lib.${system}.run {
+            src = ./.;
+            hooks = {
+              nixfmt.enable = true;
+              gofmt.enable = true;
+            };
+          };
+
+          metadata-server = pkgs.buildGoModule {
+            pname = "metadata-server";
+            version = "0.1.0";
+            src = ./.;
+            vendorHash = null;
+            subPackages = [ "cmd/server" ];
+
+            meta = {
+              description = "Music metadata aggregation gRPC service";
+              mainProgram = "server";
+            };
+          };
+        in
+        {
+          formatter = pkgs.nixfmt-tree;
+
+          packages = {
+            default = metadata-server;
+            server = metadata-server;
+          };
+
+          checks = {
+            inherit pre-commit-check;
+          };
+
+          devShells.default = pkgs.mkShell {
+            inherit (pre-commit-check) shellHook;
+
+            buildInputs = with pkgs; [
+              pre-commit
+              gitleaks
+              plantuml
+
+              go
+              gopls
+              gotools
+              go-tools
+              golangci-lint
+
+              buf
+              protoc-gen-go
+              protoc-gen-go-grpc
+
+              grpcurl
+            ];
+          };
+        };
+    };
+}