“Failed to configure project” when resources nested inside source folder

The VS Code Java plugin cannot import a project from a build.gradle file that places a test resources directory inside a test source directory. Gradle itself, however, supports this.

Environment

• Operating System: macOS 10.15.6
• JDK version: OpenJDK 14.0.2
• Visual Studio Code version: 1.48.1
• Java extension version: 0.65.0

Steps To Reproduce

Populate build.gradle with the following simple configuration:

plugins {
    id 'java'
}

sourceSets {
    test.java.srcDirs = ['test']
    test.resources.srcDirs = ['test/res']
}

Current Result

The VS Code plugin will produce a Failed to configure project error (with no further information, AFAICT).

However, gradle test will execute perfectly happily.

Expected Result

It should import the project with test/res copied to the test resources folder, just as gradle itself does.

build.gradle に示されているプロジェクト構成を再現し、その後、VS Code Java plugin によるネストされたテストリソースの Gradle インポート処理を追跡します。プロジェクトが「Failed to configure project」エラーなしでインポートされ、test/res がテストリソースフォルダーにコピーされれば完了です。