simplify flake, colocate build package with projects

Northwind.DataContext.Sqlite/NorthwindContext.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using Microsoft.EntityFrameworkCore;
 
@@ -39,9 +39,9 @@ protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
             string dir = Environment.CurrentDirectory;
             string path = string.Empty;
 
-            if (dir.EndsWith("net8.0"))
+            if (dir.EndsWith("net9.0"))
             {
-                // In the <project>/bin/<Debug|Release>/net8.0 directory.
+                // In the <project>/bin/<Debug|Release>/net9.0 directory.
                 path = Path.Combine("..", "..", "..", "..", database);
             }
             else

Northwind.DataContext.Sqlite/package.nix

@@ -0,0 +1,20 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-data-context";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  buildType = "Release";
+  packNupkg = true;
+  inherit dotnet-sdk dotnet-runtime;
+  projectReferences = [
+    import
+    ../northwind.entitymodels.sqlite
+    {
+      inherit pkgs dotnet-sdk dotnet-runtime;
+    }
+  ];
+}

Northwind.EntityModels.Sqlite/package.nix

@@ -0,0 +1,13 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-entity-models";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  inherit dotnet-sdk dotnet-runtime;
+  buildType = "Release";
+  packNupkg = true;
+}

Northwind.Mvc/package.nix

@@ -0,0 +1,21 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-mvc";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  buildType = "Release";
+  executables = [ "Northwind.Mvc" ];
+  inherit dotnet-sdk dotnet-runtime;
+  projectReferences = [
+    import
+    ../northwind.data-context.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+    import
+    ../northwind.entitymodels.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+  ];
+}

Northwind.UnitTests/package.nix

@@ -0,0 +1,21 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-unittests";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  buildType = "Release";
+  doCheck = true;
+  inherit dotnet-sdk dotnet-runtime;
+  projectReferences = [
+    import
+    ../northwind.data-context.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+    import
+    ../northwind.entitymodels.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+  ];
+}

Northwind.Web/package.nix

@@ -0,0 +1,21 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-web";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  buildType = "Release";
+  executables = [ "Northwind.Web" ];
+  inherit dotnet-sdk dotnet-runtime;
+  projectReferences = [
+    import
+    ../northwind.data-context.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+    import
+    ../northwind.entitymodels.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+  ];
+}

Northwind.WebApi/package.nix

@@ -0,0 +1,21 @@
+{
+  pkgs,
+  dotnet-sdk,
+  dotnet-runtime,
+}:
+pkgs.buildDotnetModule {
+  name = "northwind-webapi";
+  src = ./.;
+  nugetDeps = ../deps.json;
+  buildType = "Release";
+  executables = [ "Northwind.WebApi" ];
+  inherit dotnet-sdk dotnet-runtime;
+  projectReferences = [
+    import
+    ../northwind.data-context.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+    import
+    ../northwind.entitymodels.sqlite
+    { inherit pkgs dotnet-sdk dotnet-runtime; }
+  ];
+}

README.md

@@ -17,7 +17,6 @@ Tools used:
 - [Nix](https://srid.ca/haskell-nix) + [Flakes](https://serokell.io/blog/practical-nix-flakes)
 - [devenv](https://devenv.sh/) and [direnv](https://direnv.net/) for development shell
 - [just](https://just.systems/) as a task runner; run `just` in devshell
-- [nuget-packageslock2nix](https://github.com/mdarocha/nuget-packageslock2nix) for generating `nuget` dependency lock files for nix
 - [csharpier](https://github.com/belav/csharpier) for opinionated code formatting of C#
 - [treefmt](https://github.com/numtide/treefmt-nix) for formatting of all code on the pipeline (C# and nix)
 
@@ -37,11 +36,11 @@ Simply run the following command from the root of the project:
 $ nix develop --impure
 ```
 
-This will install a .NET SDK in version 8 and all other required dependencies in a completely isolated way (they will not interfere
+This will install a .NET SDK in version 9 and all other required dependencies in a completely isolated way (they will not interfere
 with any system installations of .NET SDK or any other software).
 
-For even better ergonomics, install [direnv](https://direnv.net/) using your favourite package manager. After that, just `cd` into the directory.
-(Note that you might have to run `direnv allow` inside the directory once.)
+For even better ergonomics, install [direnv](https://direnv.net/) using your favourite package manager. After that, just `cd` into the directory
+and run `direnv allow` to enable the automatic shell hook.
 
 When using `vscode` or `emacs`, use the corresponding `direnv` extension:
 - [direnv for VSCode](https://marketplace.visualstudio.com/items?itemName=mkhl.direnv)

flake.nix

@@ -35,106 +35,45 @@
         system:
         let
           pkgs = import nixpkgs { inherit system; };
+          dotnet-sdk = pkgs.dotnet-sdk_9;
+          dotnet-runtime = pkgs.dotnet-runtime_9;
+
         in
 
         rec {
           devenv-up = self.devShells.${system}.default.config.procfileScript;
 
-          entity-models = pkgs.buildDotnetModule {
-            name = "northwind-entity-models";
-            src = ./northwind.entitymodels.sqlite;
-
-            nugetDeps = ./deps.json;
-
-            dotnet-sdk = pkgs.dotnet-sdk_9;
-            dotnet-runtime = pkgs.dotnet-runtime_9;
-
-            packNupkg = true;
+          web = import ./northwind.web/package.nix {
+            inherit pkgs dotnet-sdk dotnet-runtime;
           };
 
-          data-context = pkgs.buildDotnetModule {
-            name = "northwind-data-context";
-            src = ./northwind.datacontext.sqlite;
-
-            nugetDeps = ./deps.json;
-
-            projectReferences = [ entity-models ];
-
-            dotnet-sdk = pkgs.dotnet-sdk_9;
-            dotnet-runtime = pkgs.dotnet-runtime_9;
-
-            packNupkg = true;
+          webapi = import ./northwind.webapi/package.nix {
+            inherit pkgs dotnet-sdk dotnet-runtime;
           };
 
-          web = pkgs.buildDotnetModule {
-            name = "northwind-web";
-            src = ./northwind.web;
-
-            nugetDeps = ./deps.json;
-
-            projectReferences = [
-              data-context
-              entity-models
-            ];
-
-            dotnet-sdk = pkgs.dotnet-sdk_9;
-            dotnet-runtime = pkgs.dotnet-runtime_9;
-
-            buildType = "Release";
-
-            executables = [ "Northwind.Web" ];
+          mvc = import ./northwind.mvc/package.nix {
+            inherit pkgs dotnet-sdk dotnet-runtime;
           };
 
-          webapi = pkgs.buildDotnetModule {
-            name = "northwind-webapi";
-            src = ./northwind.webapi;
-
-            nugetDeps = ./deps.json;
-
-            projectReferences = [
-              data-context
-              entity-models
-            ];
-
-            dotnet-sdk = pkgs.dotnet-sdk_9;
-            dotnet-runtime = pkgs.dotnet-runtime_9;
-
-            buildType = "Release";
-
-            executables = [ "Northwind.WebApi" ];
-          };
-
-          mvc = pkgs.buildDotnetModule {
-            name = "northwind-mvc";
-            src = ./northwind.mvc;
-
-            nugetDeps = ./deps.json;
-
-            projectReferences = [
-              data-context
-              entity-models
-            ];
-
-            dotnet-sdk = pkgs.dotnet-sdk_9;
-            dotnet-runtime = pkgs.dotnet-runtime_9;
-
-            buildType = "Release";
-
-            executables = [ "Northwind.Mvc" ];
-          };
         }
       );
 
       apps = forEachSystem (system: {
-        web = mkApp (self.packages.${system}.web) "Northwind.Web";
-        webapi = mkApp (self.packages.${system}.webapi) "Northwind.WebApi";
-        mvc = mkApp (self.packages.${system}.mvc) "Northwind.Mvc";
+        web = mkApp self.packages.${system}.web "Northwind.Web";
+        webapi = mkApp self.packages.${system}.webapi "Northwind.WebApi";
+        mvc = mkApp self.packages.${system}.mvc "Northwind.Mvc";
       });
 
       devShells = forEachSystem (
         system:
         let
           pkgs = nixpkgs.legacyPackages.${system};
+          dotnet-sdk =
+            with pkgs.dotnetCorePackages;
+            combinePackages [
+              sdk_9_0-bin
+              sdk_8_0-bin
+            ];
 
         in
         {
@@ -150,7 +89,7 @@
 
                   just # task runner
                   sqlite # sqlite3 db for now
-                  dotnet-sdk_9 # .NET SDK version 9
+                  dotnet-sdk
 
                   nuget-to-json
                 ];
@@ -163,7 +102,7 @@
                 '';
 
                 enterShell = ''
-                  export DOTNET_ROOT=${pkgs.dotnet-sdk_9}/share/dotnet
+                  export DOTNET_ROOT=${dotnet-sdk}/share/dotnet
                   cowsay "Welcome to .NET dev shell" | lolcat
                 '';
               }
@@ -178,25 +117,14 @@
         system:
         let
           pkgs = import nixpkgs { inherit system; };
+          dotnet-sdk = pkgs.dotnet-sdk_9;
+          dotnet-runtime = pkgs.dotnet-runtime_9;
+
         in
         {
           formatting = treefmtEval.${system}.config.build.check self;
-          unit-tests = pkgs.stdenv.mkDerivation {
-            name = "northwind-unittests";
-            src = ./.;
-            nativeBuildInputs = with pkgs; [ dotnet-sdk_9 ];
-            buildInputs = with pkgs; [ dotnet-sdk_9 ];
-            doCheck = true;
-            checkPhase = ''
-              dotnet test
-            '';
-
-            buildPhase = ''
-              # make compile
-            '';
-            installPhase = ''
-              mkdir -p $out/bin
-            '';
+          unittests = import ./northwind.unittests/package.nix {
+            inherit pkgs dotnet-sdk dotnet-runtime;
           };
         }
       );