如何构建具有渐进项目依赖关系的项目

问题描述

我刚刚毕业，我正在使用gradle在Eclipse中使用Gradle IDE插件来构建项目（Gradle版本2.3，Gradle IDE版本3.6.3）

我有一个例子平面布局中的三个Java项目依赖于A-> B-> C。项目A，B和C除了直接依赖以外，对其他项目一无所知。我需要构建每个项目。

我成功地使B依赖于C与项目B中的settings.gradle文件来包含项目C，而B和C的构建成功。

  include：C
 project（'：C'）。projectDir = new File（settingsDir，'../C' ）
  

然后我尝试添加依赖关系A - > B与我尝试使用B-> C（通过添加settings.gradle文件）。但这一次，项目A的构建失败，出现错误：找不到C / B。项目B中的settings.gradle文件未被读取。

我不想将C的依赖关系信息添加到A来构建A，因为A不应该知道C.我搜索并且无法获取答案。有没有办法在毕业生中解决这种传递性的项目依赖？非常感谢。

解决方案

我已经通过研究毕业的DSL文档和一些groovy自己解决了这个问题。我在我的settings.gradle文件中添加以下代码以应用子项目的settings.gradle（如果存在）。

  def applySettings = {
 def file = new File（project（it）.projectDir，settings.gradle ）; 
 if（file.exists（））{
 applyfrom：file.toURI（）
} 
} 
 
 applySettings'：B' 
  

I'm new to gradle, and I'm trying using gradle to build projects in Eclipse with Gradle IDE plugin.(Gradle version 2.3, Gradle IDE version 3.6.3)
I have an example of three Java projects in flat layout with dependency A->B->C. The project A, B and C know nothing about the others except the direct dependency. I need to build each of the projects.
I successfully made B depend on C with settings.gradle file in Project B to include Project C, and the build of B and C was successful.

include ":C"
project(':C').projectDir = new File(settingsDir, '../C')

Then I tried adding dependency A -> B with the same way I had tried with B->C (by adding the settings.gradle file). But this time the build of project A failed with error: cannot find C under /B. The settings.gradle file in project B was not read.
I don't want to add dependency info of C to A to build A, for A should not know about C. I searched and could not get the answer. Is there a way to resolve this kind of transitive project dependency in gradle? Thanks very much.

解决方案

I have solved the problem myself with the studying of gradle DSL document and some groovy. I add the following code in my settings.gradle files to apply settings.gradle of the subproject if it exists.

def applySettings = {
    def file = new File(project(it).projectDir, "settings.gradle");
    if (file.exists()) {
        apply "from" : file.toURI()
    }
}

applySettings ':B'

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