Remove legacy Android task support in Gradle Plugin, improve support for new variant API

[mikepenz]

This pull request introduces significant breaking changes to the AboutLibraries Gradle plugin, primarily removing deprecated APIs and enforcing compatibility with Android Gradle Plugin (AGP) 7.0.0 or newer. The changes simplify the plugin's codebase by eliminating legacy support and tasks, and update documentation and build scripts to reflect these requirements.

Plugin API and Compatibility Updates:

• The plugin now requires AGP 7.0.0 or newer, enforced via a runtime check for AndroidComponentsExtension. Attempting to use the plugin with an older AGP version will log an error and abort plugin application. (AboutLibrariesPluginAndroid.kt, AboutLibrariesPluginAndroidExtension.kt) [1] [2]
• All legacy APIs and support for pre-AGP 7 variants (AppExtension, LibraryExtension, and related code paths) have been removed. The plugin now exclusively uses the new AGP variants API. (AboutLibrariesPluginAndroidExtension.kt)

Task Cleanup and Deprecation Removal:

• The deprecated generateLibraryDefinitions* tasks and all related code (including the deprecated property and warnings) have been removed. Only the exportLibraryDefinitions* tasks remain. (AboutLibrariesPluginAndroidExtension.kt, AboutLibrariesTask.kt) [1] [2] [3]

Documentation and Build Script Updates:

• The migration guide (MIGRATION.md) is updated to document the removal of deprecated tasks and the new AGP 7+ requirement.
• The sample shared module build script enables Android resources for KMP and removes the unused androidKmpLibrary plugin alias. (sample/shared/build.gradle.kts) [1] [2]

CI Workflow Adjustment:

• The CI workflow no longer attempts to build the staging variant, aligning with the updated plugin and build configuration. (.github/workflows/ci.yml)

[Copilot]

Pull request overview

This pull request introduces breaking changes to modernize the AboutLibraries Gradle plugin by removing all legacy API support and enforcing compatibility with Android Gradle Plugin (AGP) 7.0.0 or newer. The plugin now exclusively uses the new AGP variants API (AndroidComponentsExtension) and eliminates all deprecated tasks and code paths.

Key Changes:

• Enforces AGP 7.0.0+ requirement through runtime check using Class.forName()
• Removes all deprecated generateLibraryDefinitions* tasks and related code
• Eliminates legacy variant API support (AppExtension, LibraryExtension) and associated task configuration

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
plugin-build/plugin/src/main/kotlin/com/mikepenz/aboutlibraries/plugin/AboutLibrariesPluginAndroid.kt	Adds AGP 7.0.0+ version check and removes legacy resource task configuration method
plugin-build/plugin/src/main/kotlin/com/mikepenz/aboutlibraries/plugin/AboutLibrariesPluginAndroidExtension.kt	Removes support for pre-AGP 7 variant APIs and eliminates deprecated task registration code
plugin-build/plugin/src/main/kotlin/com/mikepenz/aboutlibraries/plugin/AboutLibrariesTask.kt	Removes deprecated property and warning logic from task action
MIGRATION.md	Documents breaking changes for v14.0.0 regarding deprecated task removal and AGP 7+ requirement
sample/shared/build.gradle.kts	Removes unused plugin alias and enables experimental Android resources for KMP
.github/workflows/ci.yml	Removes staging variant from release build command

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