grafana-alloy: 1.11.3 -> 1.12.1

Grafana Alloy's frontend uses a npm lock file now

pkgs/by-name/gr/grafana-alloy/package.nix

@@ -2,12 +2,9 @@
   lib,
   stdenv,
   fetchFromGitHub,
-  fetchYarnDeps,
   buildGoModule,
+  buildNpmPackage,
   systemd,
-  yarn,
-  fixup-yarn-lock,
-  nodejs,
   grafana-alloy,
   nixosTests,
   nix-update-script,
@@ -17,24 +14,39 @@
   useLLD ? stdenv.hostPlatform.isArmv7,
 }:
 
-buildGoModule (finalAttrs: {
+buildGoModule (finalAttrs: rec {
   pname = "grafana-alloy";
-  version = "1.11.3";
-
+  version = "1.12.1";
   src = fetchFromGitHub {
     owner = "grafana";
     repo = "alloy";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-yO1r7GLXlD7f5Fpooit7SwkB7EB1hDO42o3BLvWY8Qo=";
+    hash = "sha256-DfezWaLbCty8FiFA+oEqiDoZ1QKIdYGtywQ6t2vm/N0=";
   };
 
+  frontend =
+    let
+      fsrc = "${src}/internal/web/ui";
+    in
+    buildNpmPackage {
+      pname = "alloy-frontend";
+      inherit version;
+
+      src = fsrc;
+
+      npmDepsHash = "sha256-mEcPH+kuj+o60sK+JsRAwHauT7vHnZQZ+KBhKcDSeok=";
+
+      installPhase = ''
+        mkdir $out
+        cp -av dist $out/share
+      '';
+
+    };
+
   proxyVendor = true;
-  vendorHash = "sha256-8n1r2Wun5ZSvjsU2Vl/fSRoQnTfKbrcQI6a7YDX/HZA=";
+  vendorHash = "sha256-pZNPJ4rSsvOHubCYKx+CblOUwI6eb6ckHwzRRtyRNu4=";
 
   nativeBuildInputs = [
-    fixup-yarn-lock
-    yarn
-    nodejs
     installShellFiles
   ]
   ++ lib.optionals useLLD [ lld ];
@@ -62,39 +74,15 @@ buildGoModule (finalAttrs: {
     "promtail_journal_enabled"
   ];
 
+  patchPhase = ''
+    # Copy frontend build in
+    cp -va "${frontend}/share" "internal/web/ui/dist"
+  '';
+
   subPackages = [
     "."
   ];
 
-  # Skip building the frontend in the goModules FOD
-  overrideModAttrs = (
-    _: {
-      preBuild = null;
-    }
-  );
-
-  yarnOfflineCache = fetchYarnDeps {
-    yarnLock = "${finalAttrs.src}/internal/web/ui/yarn.lock";
-    hash = "sha256-oCDP2XJczLXgzEjyvFEIFBanlnzjrj0So09izG5vufs=";
-  };
-
-  preBuild = ''
-    pushd internal/web/ui
-
-    # Yarn wants a real home directory to write cache, config, etc to
-    export HOME=$NIX_BUILD_TOP/fake_home
-
-    fixup-yarn-lock yarn.lock
-    yarn config --offline set yarn-offline-mirror ${finalAttrs.yarnOfflineCache}
-    yarn install --offline --frozen-lockfile --ignore-platform --ignore-scripts --no-progress --non-interactive
-
-    patchShebangs node_modules/
-
-    yarn --offline build
-
-    popd
-  '';
-
   # uses go-systemd, which uses libsystemd headers
   # https://github.com/coreos/go-systemd/issues/351
   NIX_CFLAGS_COMPILE = lib.optionals stdenv.hostPlatform.isLinux [
@@ -139,7 +127,7 @@ buildGoModule (finalAttrs: {
       ];
     };
     # alias for nix-update to be able to find and update this attribute
-    offlineCache = finalAttrs.yarnOfflineCache;
+    inherit frontend;
   };
 
   meta = {