initial backend nix build - get jar

.gitignore

@@ -30,3 +30,4 @@ target
 .metals
 project/project
 project/metals.sbt
+/result

build.sbt

@@ -1,6 +1,7 @@
 import org.scalajs.linker.interface.ModuleSplitStyle
 
 lazy val commonSettings = Seq(
+  version := "0.1.1",
   scalaVersion := "3.2.0"
 )
 

flake.lock

@@ -18,6 +18,21 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1682080641,
@@ -36,7 +51,30 @@
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "sbt-derivation": "sbt-derivation"
+      }
+    },
+    "sbt-derivation": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1675083208,
+        "narHash": "sha256-+sSFhSpV2jckr1qYlX/SaxQ6IdpagD6o4rru/3HAl0I=",
+        "owner": "zaninime",
+        "repo": "sbt-derivation",
+        "rev": "92d6d6d825e3f6ae5642d1cce8ff571c3368aaf7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "zaninime",
+        "ref": "master",
+        "repo": "sbt-derivation",
+        "type": "github"
       }
     },
     "systems": {

flake.nix

@@ -2,12 +2,17 @@
   description = "Planning Poker web app. Trying to build something and learn new things";
   inputs.nixpkgs.url = "github:nixos/nixpkgs";
   inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.sbt-derivation.url = "github:zaninime/sbt-derivation/master";
+  inputs.sbt-derivation.inputs.nixpkgs.follows = "nixpkgs";
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils, sbt-derivation }:
     flake-utils.lib.eachDefaultSystem
       (system:
-        let pkgs = nixpkgs.legacyPackages.${system}; in
-        {
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          packageName = "blanning-poker-grargh";
+          version = "0.1.1";
+        in {
           devShells.default = pkgs.mkShell {
             buildInputs = [
               pkgs.nodejs
@@ -21,6 +26,22 @@
               echo "dev env for planning poker BWARGH started"
             '';
           };
+          packages.backend = sbt-derivation.lib.mkSbtDerivation rec {
+            inherit pkgs version;
+
+            # ...and the rest of the arguments
+            pname = "${packageName}-backend";
+            depsSha256 = "sha256-UOEq6KFS4rh4eaKxnRcVOh4SQWn3hnfpzcyRqPnFvco=";
+            src = pkgs.nix-gitignore.gitignoreSource [] ./.;
+            buildPhase = ''
+              sbt backend/assembly
+            '';
+            installPhase = ''
+              mkdir -p $out/bin
+              cp backend/target/scala-*/backend-assembly-*.jar $out/bin/
+            '';
+
+          };
         }
       );
   # see https://serokell.io/blog/practical-nix-flakes