Could not run build action using Gradle distribution: Could not get unknown property

If my build.gradle uses two external properties artifactory_user and artifactory_password, and I have them defined inside ~/.gradle/gradle.properties, VS Code does not look them up and fails:

buildscript {
    repositories {
        maven {
            url 'https://artifactory.example.com'
            credentials {
                username = "${artifactory_user}"
                password = "${artifactory_password}"
            }
        }
    }
}

Error message:

Could not run build action using Gradle distribution 'https://artifactory.example.com/gradle-cache/gradle-4.5-bin.zip'.
Build file '/Users/someuser/someproj/build.gradle' line: ...
A problem occurred evaluating root project 'someproj'.
Could not get unknown property 'artifactory_user' for Credentials [username: null] of type 

Environment

• Operating System: macOS 10.14.5
• JDK version: OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.212-b03, mixed mode)
• Visual Studio Code version: 1.35.0
• Java extension version: 0.46.0

Steps To Reproduce

1. Define a couple of properties in your ~/.gradle/gradle.properties
2. Use them in your build.gradle

Current Result

Could not run build action using Gradle distribution 'https://artifactory.example.com/gradle-cache/gradle-4.5-bin.zip'.
Build file '/Users/someuser/someproj/build.gradle' line: ...
A problem occurred evaluating root project 'someproj'.
Could not get unknown property 'artifactory_user' for Credentials [username: null] of type 

Expected Result

The artifactory_user and artifactory_password properties to be resolved.

issue の build.gradle と ~/.gradle/gradle.properties の設定を使って失敗を再現し、その後、ビルドファイルを評価する Gradle の build アクションから始めます。そのアクション中に外部プロパティがどのように読み込まれるかを追跡します。artifactory_user と artifactory_password のプロパティが正常に解決され、build アクションが完了すれば完了です。