I’m tired of mvn2nix

I figured out how to get things working, but it requires non-trivial
modifications to it, and I am not in a mmod to make them. Especially
given that building OH from source doesn’t actually make much sense –
mvn will “just” download the “built” dependencies anyhow…

flake.lock

@@ -0,0 +1,42 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1676283394,
+        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1677022426,
+        "narHash": "sha256-dCFSTknONT7Rz5AYHEXrh4kpgSZjqjuu/lXJhJTiS78=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8260d35eb9212c4803a3c612a9f7e29c3434fde2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -2,24 +2,15 @@
     inputs = {
         nixpkgs.url = "github:NixOS/nixpkgs";
         flake-utils.url = "github:numtide/flake-utils";
-        openhab-distro = {
-            url = "github:openhab/openhab-distro/3.4.2"; # OH-DISTRO-URL
-            flake = false;
-        };
     };
 
-    outputs = { flake-utils, nixpkgs, openhab-distro, ... }: flake-utils.lib.eachDefaultSystem (system: {
+    outputs = { flake-utils, nixpkgs, ... }: flake-utils.lib.eachDefaultSystem (system: {
         packages = rec {
             jdk-openhab = nixpkgs.legacyPackages.${system}.jdk11;
-            maven-openhab = nixpkgs.legacyPackages.${system}.maven.override { jdk = jdk-openhab; };
-            openhab-repository = nixpkgs.legacyPackages.${system}.callPackage ./openhab-repository.nix {
-                inherit openhab-distro;
-                maven = maven-openhab;
-            };
             openhab = nixpkgs.legacyPackages.${system}.callPackage ./openhab.nix {
-                inherit openhab-distro openhab-repository jdk-openhab;
-                maven = maven-openhab;
+                inherit jdk-openhab;
             };
+            openhab-addons = nixpkgs.legacyPackages.${system}.callPackage ./openhab-addons.nix {};
             default = openhab;
         };
     });

openhab-repository.nix

@@ -1,16 +0,0 @@
-# Downloads various dependencies for the openhab build.
-{ lib, stdenv, maven, openhab-distro, fetchurl, linkFarm }:
-
-let
-    dependencies = (builtins.fromJSON (builtins.readFile ./mvn2nix-lock.json )).dependencies;
-    dependenciesAsDrv = (lib.forEach (lib.attrValues dependencies) (dependency: {
-        drv = fetchurl {
-            url = dependency.url;
-            sha256 = dependency.sha256;
-        };
-        layout = dependency.layout;
-    }));
-in linkFarm "openhab-repository" (lib.forEach dependenciesAsDrv (dependency: {
-    name = dependency.layout;
-    path = dependency.drv;
-}))

openhab-repository.sha256

@@ -1 +0,0 @@
-sha256-po8EjHV8lPUOxkuOnZ5mQOODg+LAhgazfx7wW6Modqc=

openhab.nix

@@ -1,23 +1,24 @@
 {
- gawk,
  bash,
  coreutils,
+ fetchurl,
+ gawk,
  jdk-openhab,
- makeWrapper,
  lib,
- maven,
- openhab-distro,
- openhab-repository,
+ makeWrapper,
  stdenv,
 }:
 
 stdenv.mkDerivation rec {
     pname = "openhab";
-    version = openhab-distro.shortRev;
-    src = openhab-distro;
-    nativeBuildInputs = [ makeWrapper maven ];
+    version = builtins.readFile ./version;
+    src = fetchurl {
+        url = "https://github.com/openhab/openhab-distro/releases/download/${version}/openhab-${version}.tar.gz";
+        sha256 = builtins.readFile ./sha256;
+    };
+    nativeBuildInputs = [ makeWrapper ];
     buildInputs = [ bash ];
-    outputs = [ "out" "demo" ];
+    outputs = [ "out" ];
     extraPath = lib.makeBinPath [ jdk-openhab gawk coreutils ];
     wrappedExecutables = [
         "start.sh"
@@ -35,25 +36,15 @@ stdenv.mkDerivation rec {
         "runtime/bin/update"
     ];
 
-    buildPhase = ''
-        runHook preBuild
-
-        echo "Using repository ${openhab-repository}"
-        cp -r ${openhab-repository} ./repository
-        chmod -R +rw ./repository
-        mvn --offline -B -T $NIX_BUILD_CORES -Drelease -Dmaven.repo.local=./repository package
-
-        runHook postBuild
+    unpackPhase = ''
+        runHook preUnpack
+        mkdir -p $out
+        tar -C $out -xf $src
+        runHook postUnpack
     '';
 
     installPhase = ''
         runHook preInstall
-        mkdir $out
-        tar -C $out -xf distributions/openhab/target/openhab-3.4.2.tar.gz
-        mv distributions/openhab-addons/target/openhab-addons-3.4.2.kar $out/addons/
-        mkdir $demo
-        tar -C $demo -xf distributions/openhab-demo/target/openhab-demo-3.4.2.tar.gz
-
         rm -rfv \
             "$out/"*.bat \
             "$out/runtime/bin/"*.bat \

sha256

@@ -0,0 +1 @@
+sha256-VRRRKS6tnKRAsNIk1g1/aGKfmUnc7Ih07/p5kWUOMd8=

version

@@ -0,0 +1 @@
+3.4.2