如何在不实际构建东西的情况下创建gradle下载依赖项 [英] How to make gradle download dependencies without actually building things

问题描述

在新环境中，gradle build需要花费相当长的时间，因为必须下载所有依赖项.

On a new environment gradle build takes quite a while because all dependencies have to be downloaded.

有没有一种方法可以仅下载依赖项以加快后续构建速度?

Is there a way to only download dependencies in order to speed up the following build?

通过这种方式，我们可以例如预先填充CI构建环境.

That way we could for example already prefill a CI build environment.

推荐答案

已针对Gradle 6+更新.

Updated for Gradle 6+.

一些注意事项:

• 这种新方法将jars下载到一个文件夹中，然后删除该文件夹.因此，将罐子放在Gradle缓存中的结果是一个副作用.
• 它当前使用为main源集配置的jar，但可以推广.
• 尽管既不高效也不美观，但如果您确实需要jar(以及传递依赖项)，它可能会很有用:只需注释掉runtime文件夹的删除即可.

• This new approach downloads jars into a folder, and then deletes the folder. So the result of having the jars in the Gradle cache is a side-effect.
• It currently uses jars configured for the main source-set but could be generalized.
• Even though it is neither efficient nor elegant, it can be useful if you actually want the jars (and transitive dependencies): simply comment-out the deletion of the runtime folder.

当您想要 jars(以及传递依赖项)时，此解决方案会很方便，因为您只需注释掉删除文件夹即可.

This solution can be handy when you want the jars (and transitive dependencies), as you simply have to comment-out deleting the folder.

考虑以下build.gradle(作为任意的具体示例):

Consider this build.gradle (as an arbitrary, concrete example):

apply plugin: 'java'

dependencies {
    implementation 'org.apache.commons:commons-io:1.3.2'
    implementation 'org.kie.modules:org-apache-commons-lang3:6.2.0.Beta2'
}

repositories { 
   jcenter()
}

task getDeps(type: Copy) {
    from sourceSets.main.runtimeClasspath
    into 'runtime/'

    doFirst {
        ant.delete(dir: 'runtime')
        ant.mkdir(dir: 'runtime')
    }

    doLast {
        ant.delete(dir: 'runtime')
    }
}

示例运行:

$ find /Users/measter/.gradle/caches -name "commons-io*1.3.2.jar"

$ gradle getDeps

$ find /Users/measter/.gradle/caches -name "commons-io*1.3.2.jar"
/Users/measter/.gradle/caches/modules-2/files-2.1/commons-io/commons-io/1.3.2/[snip]/commons-io-1.3.2.jar

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