从maven项目下载所有插件依赖项

Question

在实际使用之前，我正在尝试从maven项目下载所有插件依赖项。

我试过跑步：

mvn dependency:resolve-plugins

它成功地下载了插件和它们的部分依赖项。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，当您实际使用插件时，例如：

mvn exec:exec

原来它的依赖关系还没有被完全下载。

    [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)
...

这是意外的，因为根据文件默认情况下excludeTransitive属性为false (并且显式设置它没有帮助)。据我所见，它只是从定义的插件下载一个级别的传递依赖关系。

有没有办法让依赖插件下载所有的传递插件依赖，而不仅仅是第一级的依赖，然后才真正需要它们呢？

Answer 1

如果真的需要做好准备，您应该执行mvn dependency:go-offline。看看这个：

依赖关系:脱机

Apache依赖项插件

Answer 2

根据这 --您可能需要在命令行中指定一个更新的Maven依赖插件。

我用：

mvn org.apache.maven.plugins:maven-dependency-plugin:3.0.0:go-offline

它似乎对我有用。