chore: upgrade toolchain to AGP 9.2.1 / Gradle 9 / nixpkgs 26.05

- nixpkgs 25.11 → 26.05; gradle_9 + jdk21; build-tools 35 → 36
- Drop custom gradle wrapper — GRADLE_OPTS works post-nixpkgs PR #449037
- AGP 8.7.3 → 9.2.1; Kotlin plugin removed (built-in since AGP 9)
- compileSdk/targetSdk 34 → 35; buildToolsVersion pinned to 36.0.0
- Java/Kotlin target 17 → 21; resValues feature flag required by AGP 9
- applicationVariants (removed in AGP 9) → androidComponents.onVariants
- Test task: testWeatherReleaseUnitTest → :app:test (all flavors, debug)
- CI artifact path fixed to cover all flavor APKs
- Docs: drop nix develop --command prefix (direnv activates shell)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/build.yaml

@@ -16,7 +16,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Unit tests
-        run: nix develop --command gradle --no-daemon :app:testReleaseUnitTest
+        run: nix develop --command gradle --no-daemon :app:test
       - name: Build release APK
         run: nix develop --command gradle --no-daemon :app:assembleRelease
       - uses: actions/upload-artifact@v3

CLAUDE.md

@@ -6,6 +6,7 @@ Runs on the living-room Sony Bravia KD-65XE9305 (Android 8.0, API 26;
 Android System WebView updates independently via Play Store — currently v138).
 Launched remotely through the Bravia REST IP-control API by Control4
 (driver lives in a separate project). See README.md for the API sequence.
+Build toolchain: AGP 9.2.1, Gradle 9 (nixpkgs 26.05), build-tools 36, compileSdk 35, JDK 21.
 
 ## Lab project — with deviations
 
@@ -20,21 +21,18 @@ This is a lab project (`lab` skill conventions apply) EXCEPT:
 ## NixOS aapt2 workaround
 
 AGP cannot run the Maven-downloaded aapt2 on NixOS (dynamically linked
-generic Linux binary). The flake's dev shell ships a wrapped `gradle` that
-always passes `-Dorg.gradle.project.android.aapt2FromMavenOverride=<sdk
-aapt2>` on the command line; Gradle turns `org.gradle.project.*` system
-props into project properties, which is what AGP reads. It must be a CLI
-arg: the nixpkgs-25.11 gradle wrapper ignores `GRADLE_OPTS` (fixed
-post-25.11, nixpkgs PR #449037 — the flake wrapper can be dropped once
-the pin moves past 25.11). No file rewriting; `gradle.properties` stays
-untouched.
+generic Linux binary). The dev shell sets `GRADLE_OPTS` to pass
+`-Dorg.gradle.project.android.aapt2FromMavenOverride=<sdk aapt2>`;
+Gradle turns `org.gradle.project.*` system props into project properties,
+which is what AGP reads. Works since nixpkgs 26.05 (PR #449037 merged
+post-25.11). No file rewriting; `gradle.properties` stays untouched.
 
-## Commands (user-run, from repo root)
+## Commands (user-run, from repo root, direnv activates devshell)
 
-- Tests:        `nix develop --command gradle --no-daemon :app:testWeatherReleaseUnitTest`
-- All APKs:     `nix develop --command gradle --no-daemon :app:assembleRelease`
+- Tests:        `gradle --no-daemon :app:test`
+- All APKs:     `gradle --no-daemon :app:assembleRelease`
   → `app/build/outputs/apk/<flavor>/release/<flavor>-release.apk`
-- Single APK:   `nix develop --command gradle --no-daemon :app:assembleWeatherRelease`
+- Single APK:   `gradle --no-daemon :app:assembleWeatherRelease`
 - Sideload:     `adb connect <tv-ip>:5555 && adb install -r <apk>`
   (bump `versionCode` in app/build.gradle.kts first for upgrades)
 - Fresh install: `adb uninstall cz.c3c.webviewkiosk && adb install <apk>`

README.md

@@ -25,10 +25,10 @@ Each entry produces a separate APK with a unique `applicationId`
 ## Build
 
     # all flavors
-    nix develop --command gradle --no-daemon :app:assembleRelease
+    gradle --no-daemon :app:assembleRelease
 
     # single flavor
-    nix develop --command gradle --no-daemon :app:assembleWeatherRelease
+    gradle --no-daemon :app:assembleWeatherRelease
 
 APKs: `app/build/outputs/apk/<flavor>/release/<flavor>-release.apk`
 

app/build.gradle.kts

@@ -2,7 +2,6 @@ import org.yaml.snakeyaml.Yaml
 
 plugins {
     id("com.android.application")
-    id("org.jetbrains.kotlin.android")
 }
 
 @Suppress("UNCHECKED_CAST")
@@ -11,18 +10,20 @@ val webviews: Map<String, Map<String, String>> =
 
 android {
     namespace = "cz.c3c.webviewkiosk"
-    compileSdk = 34
+    compileSdk = 35
+    buildToolsVersion = "36.0.0"
 
     defaultConfig {
         applicationId = "cz.c3c.webviewkiosk"
         minSdk = 26 // Sony KD-65XE9305 final firmware = Android 8.0
-        targetSdk = 34
+        targetSdk = 35
         versionCode = 1 // bump on every release; adb install -r refuses downgrades
         versionName = "0.1.0"
     }
 
     buildFeatures {
         buildConfig = true
+        resValues = true
     }
 
     signingConfigs {
@@ -54,22 +55,19 @@ android {
         }
     }
 
-    @Suppress("DEPRECATION")
-    applicationVariants.all {
-        val flavor = productFlavors.first().name
-        val type = buildType.name
-        outputs.all {
-            (this as com.android.build.gradle.internal.api.BaseVariantOutputImpl)
-                .outputFileName = "$flavor-$type.apk"
-        }
-    }
-
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+}
+
+androidComponents {
+    onVariants { variant ->
+        variant.outputs.forEach { output ->
+            val flavor = variant.productFlavors.firstOrNull()?.second ?: variant.name
+            val buildType = variant.buildType ?: "debug"
+            output.outputFileName.set("$flavor-$buildType.apk")
         }
-    kotlinOptions {
-        jvmTarget = "17"
     }
 }
 

build.gradle.kts

@@ -5,6 +5,5 @@ buildscript {
 }
 
 plugins {
-    id("com.android.application") version "8.7.3" apply false
-    id("org.jetbrains.kotlin.android") version "2.0.21" apply false
+    id("com.android.application") version "9.2.1" apply false
 }

flake.lock

@@ -20,16 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1781214844,
-        "narHash": "sha256-GiKi1nonuwTHG1mTrwFTllfMSN2rvHQZUgpW0nQX/qM=",
+        "lastModified": 1781284521,
+        "narHash": "sha256-AFxK4Q2YbBXehBxJEL0IWTS+pauHY1w6O/GBUijTRF0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9bc9b4b4e7b1e7ce7ec2a8355b4369541b90cd6a",
+        "rev": "a06029d13f9b4a70db3aae42d4f233e6f6c92075",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "release-25.11",
+        "ref": "release-26.05",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -9,7 +9,7 @@
   description = "Android TV fullscreen WebView kiosk for the Grafana house dashboard";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/release-25.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/release-26.05";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
@@ -30,10 +30,10 @@
           };
         };
 
-        buildToolsVersion = "34.0.0";
+        buildToolsVersion = "36.0.0";
 
         androidComposition = pkgs.androidenv.composeAndroidPackages {
-          platformVersions = [ "34" ];
+          platformVersions = [ "35" ];
           buildToolsVersions = [ buildToolsVersion ];
           includeEmulator = false;
           includeSystemImages = false;
@@ -43,36 +43,25 @@
         sdkRoot = "${androidSdk}/libexec/android-sdk";
 
         fonts = with pkgs; [ noto-fonts dejavu_fonts freefont_ttf ];
-
-        # NixOS gotcha: AGP downloads a dynamically-linked aapt2 from Maven
-        # that can't run on NixOS. android.aapt2FromMavenOverride is a Gradle
-        # *project* property; `-Dorg.gradle.project.<name>` on the command line
-        # sets one. It must be a CLI arg, not GRADLE_OPTS: the gradle package
-        # in nixpkgs 25.11 is a raw `exec java ... GradleMain "$@"` wrapper
-        # that ignores GRADLE_OPTS (fixed post-25.11 in nixpkgs PR #449037 —
-        # once we're past 25.11, plain GRADLE_OPTS works and this wrapper can go).
-        gradle = pkgs.symlinkJoin {
-          name = "gradle-nixos-aapt2";
-          paths = [ pkgs.gradle ];
-          nativeBuildInputs = [ pkgs.makeWrapper ];
-          postBuild = ''
-            wrapProgram $out/bin/gradle \
-              --add-flags "-Dorg.gradle.project.android.aapt2FromMavenOverride=${sdkRoot}/build-tools/${buildToolsVersion}/aapt2"
-          '';
-        };
       in
       {
         devShells.default = pkgs.mkShell {
           packages = [
             androidSdk
-            pkgs.jdk17
-            gradle # wrapped, see above
+            pkgs.jdk21
+            pkgs.gradle_9
             pkgs.imagemagick # banner/icon generation
             pkgs.android-tools # adb for sideloading
           ] ++ fonts;
 
           ANDROID_HOME = sdkRoot;
           ANDROID_SDK_ROOT = sdkRoot;
+          JAVA_HOME = "${pkgs.jdk21}";
+          # NixOS gotcha: AGP downloads a dynamically-linked aapt2 from Maven
+          # that can't run on NixOS. Set android.aapt2FromMavenOverride via
+          # GRADLE_OPTS so AGP uses the SDK's aapt2 instead. Works since
+          # nixpkgs PR #449037 (merged post-25.11, present in 26.05+).
+          GRADLE_OPTS = "-Dorg.gradle.project.android.aapt2FromMavenOverride=${sdkRoot}/build-tools/${buildToolsVersion}/aapt2";
           FONTCONFIG_FILE = pkgs.makeFontsConf { fontDirectories = fonts; };
         };
       }