从 maven 项目下载所有插件依赖项

Question

我试图在实际使用它们之前从 Maven 项目下载所有插件依赖项。

我试过了运行:

mvn dependency:resolve-plugins

这成功下载了它的插件及其部分依赖项。例如，对于 exec 插件，我得到：

... 
[INFO] Plugin Resolved: exec-maven-plugin-1.6.0.jar
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-toolchain/2.2.1/maven-toolchain-2.2.1.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven-toolchain/2.2.1/maven-toolchain-2.2.1.jar (37 KB at 437.4 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-artifact-manager/2.2.1/maven-artifact-manager-2.2.1.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven-artifact-manager/2.2.1/maven-artifact-manager-2.2.1.jar (66 KB at 709.6 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.20/plexus-utils-3.0.20.jar
Downloaded: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.20/plexus-utils-3.0.20.jar (238 KB at 1785.2 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/apache/commons/commons-exec/1.3/commons-exec-1.3.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/commons/commons-exec/1.3/commons-exec-1.3.jar (54 KB at 610.9 KB/sec)
[INFO]     Plugin Dependency Resolved: maven-toolchain-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-project-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-model-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-artifact-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-artifact-manager-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-core-2.2.1.jar
[INFO]     Plugin Dependency Resolved: maven-plugin-api-2.2.1.jar
[INFO]     Plugin Dependency Resolved: plexus-utils-3.0.20.jar
[INFO]     Plugin Dependency Resolved: commons-exec-1.3.jar
...

但是，当你实际使用插件时，例如：

mvn exec:exec

原来它的依赖还没有完全下载。

    [INFO] --- exec-maven-plugin:1.6.0:exec (default-cli) @ ARandomProject ---
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-toolchain/2.2.1/maven-toolchain-2.2.1.pom
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven-toolchain/2.2.1/maven-toolchain-2.2.1.pom (4 KB at 6.9 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven/2.2.1/maven-2.2.1.pom
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven/2.2.1/maven-2.2.1.pom (22 KB at 179.4 KB/sec)
...
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/reporting/maven-reporting-api/2.2.1/maven-reporting-api-2.2.1.jar (10 KB at 21.8 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-plugin-descriptor/2.2.1/maven-plugin-descriptor-2.2.1.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/doxia/doxia-logging-api/1.1/doxia-logging-api-1.1.jar (12 KB at 23.0 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-monitor/2.2.1/maven-monitor-2.2.1.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/doxia/doxia-sink-api/1.1/doxia-sink-api-1.1.jar (13 KB at 25.0 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar
Downloaded: https://repo.maven.apache.org/maven2/commons-cli/commons-cli/1.2/commons-cli-1.2.jar (41 KB at 79.2 KB/sec)
Downloading: https://repo.maven.apache.org/maven2/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven-plugin-descriptor/2.2.1/maven-plugin-descriptor-2.2.1.jar (39 KB at 73.4 KB/sec)
...

这是出乎意料的，因为 according to the documentation excludeTransitive 属性默认为 false（显式设置它无济于事）。据我所知，它只是从定义的插件中下载一级传递依赖项。

有没有办法让依赖插件在实际需要之前下载所有的传递插件依赖项，而不是仅下载第一级依赖项？

Answer 1

如果你真的需要一切准备就绪，你应该执行mvn dependency:go-offline。检查一下：

dependency:go-offline

Apache Maven Dependency Plugin

从 maven 项目下载所有插件依赖项

Downloading all plugin dependencies from a maven project

maven

maven-dependency-plugin