Gradle额外属性不存在 - 在子模块中定义

Question

我正在将maven build迁移到gradle,我正在努力在根项目中定义基本的插件配置.并在子模块中提供特定的配置属性.

这是一个例子:

root:build.gradle

configure(filterSubprojects(['component'])) {

    apply plugin: "org.flywaydb.flyway"

    flyway {
        url = "jdbc:oracle:thin:@${db.host}:${db.port}:${db.name}"
        user = db.owner.name
        password = db.owner.password
    }

}

specific-subproject-component:build.gradle

ext {
    db = [
            host          : <host>,
            port          : <port>,
            name          : <name>,
            user          : [name: <user-name>, password: <user-password>]
    ]
}

我收到这个错误:

Cannot get property 'db' on extra properties extension as it does not exist

可能是非常基本的问题,但我无法弄清楚如何做到这一点.

Answer 1

这里的问题是,在评估root build.gradle文件时,尚未评估特定组件build.gradle文件,因此当configure块运行时db确实不存在.要解决此问题,您应该能够evaluationDependsOnChildren()在root build.gradle文件中声明.