【问题标题】:How to run the Gradle kotlin-dsl plugin in an offline environment?如何在离线环境中运行 Gradle kotlin-dsl 插件?
【发布时间】:2021-09-23 14:28:39
【问题描述】:

由于某种原因,我正在开发的机器没有连接到互联网。

我有应用程序和构建脚本的所有依赖项的本地副本。我想用 Kotlin 脚本运行 Gradle,特别是 kotlin-dsl gradle 插件。由于某种原因,仅下载依赖项是不够的。

我目前有:

        <dependency>
            <groupId>org.gradle.kotlin.kotlin-dsl</groupId>
            <artifactId>org.gradle.kotlin.kotlin-dsl.gradle.plugin</artifactId>
            <version>1.4.9</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>org.gradle.kotlin</groupId>
            <artifactId>gradle-kotlin-dsl-plugins</artifactId>
            <version>1.4.9</version>
        </dependency>

        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-compiler-embeddable</artifactId>
            <version>1.4.20</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>1.4.20</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-sam-with-receiver</artifactId>
            <version>1.4.20</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-gradle-plugin</artifactId>
            <version>1.4.20</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-scripting-compiler-embeddable</artifactId>
            <version>1.4.20</version>
        </dependency>

(不要问为什么是 Maven 格式,但它应该能传达信息)

但在离线运行时,运行任何 Gradle 任务都会失败

FAILURE: Build failed with an exception.

* Where:
Build file '<path>/build.gradle.kts' line: 1

* What went wrong:
Plugin [id: 'org.gradle.kotlin.kotlin-dsl', version: '1.4.9'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'org.gradle.kotlin.kotlin-dsl:org.gradle.kotlin.kotlin-dsl.gradle.plugin:1.4.9')
  Searched in the following repositories:
    Gradle Central Plugin Repository

所以,如果有人知道我需要哪些其他依赖项,或者在哪里可以找到,那将不胜感激。

【问题讨论】:

    标签: kotlin gradle offline


    【解决方案1】:

    我已尝试重现您的设置。 我使用 gradle init 生成了一个新的 Gradle 项目,选择了一个使用 Gradle Kotlin DSL 用 Kotlin 编写的简单库。

    我在没有任何互联网连接的环境(docker 容器)中(容器以--network none 启动)。

    我使用的是最新版本的 Gradle (7.3.1),无法重现您的确切问题。

    我在一开始看到这样的东西:

    > Evaluating settings > Generating gradle-api-7.3.1.jar
    > Evaluating settings > Generating gradle-kotlin-dsl-extensions-7.3.1.jar
    ...
    

    所以我怀疑 Gradle 会设法生成您遇到问题的 kotlin dsl jar。

    但是我的构建失败了:

    FAILURE: Build failed with an exception.
    
    * Where:
    Build file '/home/work/lib/build.gradle.kts' line: 9
    
    * What went wrong:
    Plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.5.31'] was not found in any of the following sources:
    
    - Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
    - Plugin Repositories (could not resolve plugin artifact 'org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin:1.5.31')
      Searched in the following repositories:
        Gradle Central Plugin Repository
    
    

    这与您的相似,对我来说很有意义。 Gradle 无法获取插件


    所以按照你的方法,我准备了一个pom file 来下载所有必需的依赖项。

    然后我还有一个替代的 maven 设置文件 (maven-settings.xml),它将本地 maven 存储库移动到其他地方:

    <settings>
        <localRepository>/home/work/work/repo/m2</localRepository>
    </settings>
    

    然后我运行 maven 将所有依赖项下载到我的本地文件夹:

    mvn dependency:go-offline -s maven-settings.xml
    

    然后我需要向 Gradle 表明它应该从这个本地 repo 消费(见Gradle Offline Build Using Maven Repository):

    settings.gradle.kts 文件中:

    // Use the local maven repository:
    pluginManagement {
      repositories {
          maven {
            url = uri("file:///home/work/repo/m2")
          }
      }
    }
    

    lib/build.gradle.kts 中(我的Gradle 项目名为lib,由gradle init 生成),编辑repositories 块:

    repositories {
        // Use the local maven repository:
        maven {
            url = uri("file:///home/work/repo/m2")
        }
        // Use Maven Central for resolving dependencies.
        mavenCentral()
    }
    

    理论上我们甚至可以删除 mavenCentral() 行,因为在 Gradle 与 --offline 标志一起使用或没有任何互联网连接的情况下,它将不会被使用。

    然后构建就像一个魅力(在我的容器内没有互联网访问):

    root@574b7fd57f6d:/home/work# ./gradlew build
    
    Welcome to Gradle 7.3.1!
    
    Here are the highlights of this release:
     - Easily declare new test suites in Java projects
     - Support for Java 17
     - Support for Scala 3
    
    For more details see https://docs.gradle.org/7.3.1/release-notes.html
    
    Starting a Gradle Daemon (subsequent builds will be faster)
    
    BUILD SUCCESSFUL in 43s
    5 actionable tasks: 5 executed
    

    注意:

    在我的测试过程中,我也遇到了这个错误:

    FAILURE: Build failed with an exception.
    
    * What went wrong:
    Execution failed for task ':lib:compileTestKotlin'.
    > Error while evaluating property 'filteredArgumentsMap' of task ':lib:compileTestKotlin'
       > Could not resolve all files for configuration ':lib:testCompileClasspath'.
          > Could not resolve org.jetbrains.kotlin:kotlin-test:1.5.31.
            Required by:
                project :lib
             > Unable to find a variant of org.jetbrains.kotlin:kotlin-test:1.5.31 providing the requested capability org.jetbrains.kotlin:kotlin-test-framework-junit:
                  - Variant compile provides org.jetbrains.kotlin:kotlin-test:1.5.31
                  - Variant runtime provides org.jetbrains.kotlin:kotlin-test:1.5.31
                  - Variant platform-compile provides org.jetbrains.kotlin:kotlin-test-derived-platform:1.5.31
                  - Variant platform-runtime provides org.jetbrains.kotlin:kotlin-test-derived-platform:1.5.31
                  - Variant enforced-platform-compile provides org.jetbrains.kotlin:kotlin-test-derived-enforced-platform:1.5.31
                  - Variant enforced-platform-runtime provides org.jetbrains.kotlin:kotlin-test-derived-enforced-platform:1.5.31
    
    
    * Try:
    > Run with --stacktrace option to get the stack trace.
    > Run with --info or --debug option to get more log output.
    > Run with --scan to get full insights.
    
    * Get more help at https://help.gradle.org
    

    这是因为对于依赖项org.jetbrains.kotlin:kotlin-test,您还需要kotlin-test-1.5.31.module 文件。请参阅 Gradle Module Metadata 文档页面。

    这就是为什么我也有这个依赖:

    <dependency>
        <groupId>org.jetbrains.kotlin</groupId>
        <artifactId>kotlin-test</artifactId>
        <version>1.5.31</version>
        <type>module</type><!-- force maven to download the gradle metadata for this dependency -->
    </dependency>
    

    在有助于提前收集所有依赖项的 POM 文件中。

    【讨论】:

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