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1. 配置 aliyun 仓库

1.1. 1. 对当前项目起作用

在 build.gradle 中添加

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buildscript {
    repositories {
        mavenLocal()
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }
        mavenCentral()
    }    
}

allprojects {
    repositories {
        mavenLocal()
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }
        mavenCentral()
    }   
}

1.2. 2. 对所有项目起作用

$HOME/.gradle/init.d 下创建 init.gradle 文件
(初始化文件相关见: https://docs.gradle.org/current/userguide/init_scripts.html)

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allprojects{
    repositories {
        def ALIYUN_REPOSITORY_URL = 'http://maven.aliyun.com/nexus/content/groups/public'
        def ALIYUN_JCENTER_URL = 'http://maven.aliyun.com/nexus/content/repositories/jcenter'
        all { ArtifactRepository repo ->
            if(repo instanceof MavenArtifactRepository){
                def url = repo.url.toString()
                if (url.startsWith('https://repo1.maven.org/maven2')) {
                    project.logger.lifecycle "Repository ${repo.url} replaced by $ALIYUN_REPOSITORY_URL."
                    remove repo
                }
                if (url.startsWith('https://jcenter.bintray.com/')) {
                    project.logger.lifecycle "Repository ${repo.url} replaced by $ALIYUN_JCENTER_URL."
                    remove repo
                }
            }
        }
        maven {
            url ALIYUN_REPOSITORY_URL
            url ALIYUN_JCENTER_URL
        }
    }
}

2. buildScript 块的作用

buildScript 中配置的是给 build 脚本使用, 比如 task 中可以引用第三方的包; 而它之外的配置是给项目使用的.
buildScript 中也可以配置 repositories, plugin, dependency
gradle 执行脚本时, 优先执行 buildScript 中的内容, 然后才会执行剩余的脚本内容.

3. dependencies

api
implementation
compile
compileOnly
annotationProcessor
testCompile
testImplementation
testRuntimeOnly
testAnnotationProcessor
runtime

implementation(platform(“mavenBom”))
implementation(project(":module"))

4. 使用 Gradle 测试, 而不是 Junit 或 testNG

Settings / Build, Execution, Deployment / Build Tool / Gradle
Running test using -> Gradle

5. 命令

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# 查看命令帮助文档
gradle -q help --task $task_name

# 将 maven 项目转化为 gradle
# --dsl=kotlin 表示转化成 kotlin-script 语法文件, 但是目前 **不支持**
gradle init --type pom --dsl=kotlin

6. 应用脚本插件

//脚本插件
apply from: ‘other.gradle’

7. 常见问题

7.1. 1. 下载依赖源码

https://stackoverflow.com/questions/11474729/how-to-build-sources-jar-with-gradle
https://docs.gradle.org/6.0/userguide/plugin_reference.html

7.2. 2. Deprecated Gradle features were used in this build, making it incompatible with Gradle

本地 gradle 版本过低, 调高默认版本
在 gradle/wrapper/gradle-wrapper.properties 设置 gradle 版本

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

7.3. 2. 脚本插件报找不到 sourceSets

https://stackoverflow.com/questions/52975515/unresolved-reference-sourcesets-for-gradle-kotlin-dsl

用 project.the() 替代脚本插件中的 sourceSets

8. Resource

https://docs.gradle.org/current/userguide/what_is_gradle.html#five_things
https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_separation

Gradle 编译环境参数 Gradle 核心插件 插件查询 Gradle **插件使用** Gradle 插件介绍 Gradle 中文文档 Maven Publish Maven Publish 使用 kotlin-dsl-samples kotlin-examples Gradle 中文文档