java - Gradle 使用单个 build.gradle 在多个项目上构建

Question

我有这样一种情况，我在一个公共(public)目录(如项目)下有单独的项目 PROJECT_A 和 PROJECT_B。我的项目文件夹看起来像

Project

 - PROJECT_A 
 - PROJECT_B

现在我可以用一个 build.gradle 文件来构建这两个项目吗？

注意:我不想为 PROJECT_A 和 PROJECT_B 使用单独的 build.gradle 文件，但是 gradle 文件可以为构建每个项目执行不同的任务

Answer 1

这是一个示例，说明如何使用单个 build.gradle 拥有多个子项目。

项目结构有两个子项目，foo和bar，每个子项目只有一个java类Foo.java和Bar .java。否则该目录只包含默认的 gradle 目录和脚本:

├── bar
│   └── src
│       └── main
│           └── java
│               └── org
│                   └── example
│                       └── Bar.java
├── build.gradle
├── foo
│   └── src
│       └── main
│           └── java
│               └── org
│                   └── example
│                       └── Foo.java
├── gradle
│   └── wrapper
│       ├── gradle-wrapper.jar
│       └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle

单个 build.gradle 文件如下所示。评论应该清楚地说明发生了什么:

group 'org.example'
version '1.0-SNAPSHOT'

// These settings apply to all subprojects but not the root project.
subprojects {
    apply plugin: 'java'
    repositories {
        mavenCentral()
    }
}

// Get a variable for each project.
Project foo = project(':foo')
Project bar = project(':bar')

// Configure the foo project as you would in foo/build.gradle.
// Just using a misc. dependency for example purpose.
configure(foo, {
    dependencies {
        implementation 'software.amazon.awssdk:s3:2.13.71'
    }
})

// Configure the bar project as you would in bar/build.gradle.
// Just making bar depend on foo for example purpose.
configure(bar, {
    dependencies {
        compile foo
    }
})

Foo.java 和 Bar.java 包含:

package org.example;

public class Foo {
    public Foo() {
        System.out.println("Hi, I'm Foo");
    }
}

package org.example;

public class Bar {
    public Bar() {
        System.out.println("Hi, I'm Bar");
        new Foo();
    }
}

然后你就可以编译完整的项目了:

$ ./gradlew compileJava

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.3/userguide/command_line_interface.html#sec:command_line_warnings

BUILD SUCCESSFUL in 466ms
3 actionable tasks: 3 executed