Fix Dokka documentation generation failure by google-labs-jules[bot] · Pull Request #46 · keiji/jp2k-decoder-android

google-labs-jules · 2026-01-02T04:17:21Z

The dokkaHtml task was reporting "Nothing to document" because it failed to automatically detect the source files located in android/lib/src/main/java. This change adds an explicit configuration to the android/lib/build.gradle.kts file using tasks.withType<DokkaTask> to set the sourceRoots to src/main/java. This ensures that Dokka correctly parses the Kotlin files and generates the HTML documentation.

PR created automatically by Jules for task 15308418390076005872 started by @keiji

Explicitly configure `dokkaSourceSets` in `android/lib/build.gradle.kts` to point to `src/main/java`. This resolves the issue where Dokka failed to detect source files in the Android library module, resulting in empty documentation generation.

google-labs-jules · 2026-01-02T04:17:22Z

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This change addresses the "Nothing to document" error in the Dokka generation task for the `lib` module. The `lib` module was missing the `kotlin-android` plugin application, which is required for Dokka to correctly identify Kotlin source sets. This commit adds the `kotlin-android` plugin to `libs.versions.toml`, applies it in `android/lib/build.gradle.kts`, and explicitly configures Dokka to include `src/main/java` as a source root.

Explicitly configure `dokkaSourceSets` in `android/lib/build.gradle.kts` to point to `src/main/java`. This resolves the issue where Dokka failed to detect source files in the Android library module. Reverted the attempt to add `kotlin-android` plugin as it conflicts with AGP 9.0+.

Explicitly configure `dokkaSourceSets` in `android/lib/build.gradle.kts` to point to `src/main/java`. This resolves the issue where Dokka failed to detect source files in the Android library module. Removed `kotlin-android` plugin definition as it is not required with AGP 9.0+.

Downgrade Android Gradle Plugin to 8.7.3 and Kotlin to 2.1.0 to ensure stability and compatibility with Dokka documentation generation. Upgrade Dokka to 2.1.0 and enable V2 plugin mode (via `gradle.properties`). Update `compileSdk` and `targetSdk` to 35 in both app and library modules to match AGP 8.7 requirements. This allows usage of `dokkaGeneratePublicationHtml` (V2 task) for documentation generation.

keiji · 2026-01-02T06:02:18Z

FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':lib:compileDebugKotlin'.
> Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (11) and 'compileDebugKotlin' (17).
  
  Consider using JVM Toolchain: https://kotl.in/gradle/jvm/toolchain
  Learn more about JVM-target validation: https://kotl.in/gradle/jvm/target-validation 
Deprecated Gradle features were used in this build, making it incompatible with Gradle 10.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
* Try:
For more on this, please refer to https://docs.gradle.org/9.1.0/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
15 actionable tasks: 15 executed
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to generate a Build Scan (Powered by Develocity).
> Get more help at https://help.gradle.org./
BUILD FAILED in 58s

google-labs-jules · 2026-01-02T06:03:08Z

FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':lib:compileDebugKotlin'.
> Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (11) and 'compileDebugKotlin' (17).
  
  Consider using JVM Toolchain: https://kotl.in/gradle/jvm/toolchain
  Learn more about JVM-target validation: https://kotl.in/gradle/jvm/target-validation 
Deprecated Gradle features were used in this build, making it incompatible with Gradle 10.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
* Try:
For more on this, please refer to https://docs.gradle.org/9.1.0/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
15 actionable tasks: 15 executed
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to generate a Build Scan (Powered by Develocity).
> Get more help at https://help.gradle.org./
BUILD FAILED in 58s

I have updated the kotlinOptions in both lib and app modules to explicitly set jvmTarget = "11" to match the compileOptions. This should resolve the inconsistency error.

Explicitly set `kotlinOptions.jvmTarget = "11"` in both `app` and `lib` modules to match `compileOptions` (Java 11). This resolves the build failure: "Inconsistent JVM-target compatibility detected for tasks 'compileDebugJavaWithJavac' (11) and 'compileDebugKotlin' (17)". Also finalized AGP downgrade to 8.7.3 and Dokka upgrade to 2.1.0 (with V2 mode enabled).

keiji · 2026-01-02T06:26:47Z

2026-01-02T06:04:08.1191416Z ##[group]Run ./gradlew lintDebug
./gradlew lintDebug
shell: /usr/bin/bash -e {0}
env:
JAVA_HOME: /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.17-10/x64
JAVA_HOME_17_X64: /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.17-10/x64
GRADLE_ACTION_ID: gradle/actions/setup-gradle
GRADLE_USER_HOME: /home/runner/.gradle
GRADLE_BUILD_ACTION_SETUP_COMPLETED: true
GRADLE_BUILD_ACTION_CACHE_RESTORED: true
DEVELOCITY_INJECTION_INIT_SCRIPT_NAME: gradle-actions.inject-develocity.init.gradle
DEVELOCITY_INJECTION_CUSTOM_VALUE: gradle-actions
GITHUB_DEPENDENCY_GRAPH_ENABLED: false
Starting a Gradle Daemon (subsequent builds will be faster)

e: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts:33:5: Unresolved reference 'kotlinOptions'.
e: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts:34:9: Unresolved reference 'jvmTarget'.

Configure project :app
gradle/actions: Writing build results to /home/runner/work/_temp/.gradle-actions/build-results/__run-1767333853980.json

[Incubating] Problems report is available at: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/build/reports/problems/problems-report.html

FAILURE: Build failed with an exception.

Where:
Build file '/home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts' line: 33
What went wrong:
Script compilation errors:

Line 33: kotlinOptions {
^ Unresolved reference 'kotlinOptions'.

Line 34: jvmTarget = "11"
^ Unresolved reference 'jvmTarget'.

2 errors

Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.

Run with --scan to generate a Build Scan (Powered by Develocity).
Get more help at https://help.gradle.org.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 10.
BUILD FAILED in 49s

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/9.1.0/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
Process completed with exit code 1.

google-labs-jules · 2026-01-02T06:28:45Z

2026-01-02T06:04:08.1191416Z ##[group]Run ./gradlew lintDebug
./gradlew lintDebug
shell: /usr/bin/bash -e {0}
env:
JAVA_HOME: /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.17-10/x64
JAVA_HOME_17_X64: /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.17-10/x64
GRADLE_ACTION_ID: gradle/actions/setup-gradle
GRADLE_USER_HOME: /home/runner/.gradle
GRADLE_BUILD_ACTION_SETUP_COMPLETED: true
GRADLE_BUILD_ACTION_CACHE_RESTORED: true
DEVELOCITY_INJECTION_INIT_SCRIPT_NAME: gradle-actions.inject-develocity.init.gradle
DEVELOCITY_INJECTION_CUSTOM_VALUE: gradle-actions
GITHUB_DEPENDENCY_GRAPH_ENABLED: false
Starting a Gradle Daemon (subsequent builds will be faster)

e: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts:33:5: Unresolved reference 'kotlinOptions'.
e: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts:34:9: Unresolved reference 'jvmTarget'.

Configure project :app
gradle/actions: Writing build results to /home/runner/work/_temp/.gradle-actions/build-results/__run-1767333853980.json

[Incubating] Problems report is available at: file:///home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/build/reports/problems/problems-report.html

FAILURE: Build failed with an exception.

Where:
Build file '/home/runner/work/jp2k-decoder-android/jp2k-decoder-android/android/app/build.gradle.kts' line: 33

What went wrong:
Script compilation errors:

Line 33: kotlinOptions {
^ Unresolved reference 'kotlinOptions'.

Line 34: jvmTarget = "11"
^ Unresolved reference 'jvmTarget'.

2 errors

Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.

Run with --scan to generate a Build Scan (Powered by Develocity).
Get more help at https://help.gradle.org.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 10.
BUILD FAILED in 49s

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/9.1.0/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.
Process completed with exit code 1.

The build failure was due to kotlinOptions not being resolved in the app module because the kotlin-android plugin was missing (it only had kotlin-compose). I have added alias(libs.plugins.kotlin.android) to android/app/build.gradle.kts to fix this.

Add `kotlin-android` plugin to `android/app/build.gradle.kts`. This is required to access `kotlinOptions` configuration block, which was causing a build failure. This change ensures that `kotlinOptions { jvmTarget = "11" }` is correctly applied to the app module.

- Update Android Gradle Plugin to 8.13.2 - Update Kotlin to 2.3.0 - Upgrade compileSdk and targetSdk to 36 - Remove deprecated kotlin-android plugin usage - Remove unused appcompat and material dependencies - Update Dokka configuration in library module

google-labs-jules bot added 5 commits January 2, 2026 04:25

google-labs-jules bot and others added 3 commits January 2, 2026 06:29

Update documentation generation task in build workflow

2848928

keiji marked this pull request as ready for review January 2, 2026 07:22

keiji merged commit 6624244 into main Jan 2, 2026
2 checks passed

keiji deleted the fix-dokka-source-root-15308418390076005872 branch January 2, 2026 07:22

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Fix Dokka documentation generation failure#46

Fix Dokka documentation generation failure#46
keiji merged 10 commits intomainfrom
fix-dokka-source-root-15308418390076005872

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