Question

我尝试使用scp将maven创建的耳朵上传到应用服务器。

当我试图跑

时

mvn wagon:upload-single

但是我收到以下错误：

[ERROR] Failed to execute goal org.codehaus.mojo:wagon-maven-plugin:1.0-beta-3:upload-single (default-cli) on project de.volkswagen.dps.ear: Unable to create a Wagon instance for null: url can not be null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:wagon-maven-plugin:1.0-beta-3:upload-single (default-cli) on project de.volkswagen.dps.ear: Unable to create a Wagon instance for null
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:585)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:324)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:247)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:104)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:427)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:157)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:121)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: Unable to create a Wagon instance for null
    at org.codehaus.mojo.wagon.AbstractWagonMojo.createWagon(AbstractWagonMojo.java:83)
    at org.codehaus.mojo.wagon.AbstractSingleWagonMojo.execute(AbstractSingleWagonMojo.java:62)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:577)
    ... 14 more
Caused by: java.lang.NullPointerException: url can not be null
    at org.apache.maven.wagon.repository.Repository.(Repository.java:88)
    at org.codehaus.mojo.wagon.shared.WagonUtils.createWagon(WagonUtils.java:51)
    at org.codehaus.mojo.wagon.AbstractWagonMojo.createWagon(AbstractWagonMojo.java:79)
    ... 17 more

我试图将它添加到pom中，但似乎没有任何效果：

我在pom.xml中添加了以下内容：

...
    <extensions>
        <extension>
            <groupId>org.apache.maven.wagon</groupId>
            <artifactId>wagon-ssh</artifactId>
            <version>1.0-beta-6</version>
        </extension>
    </extensions>

    <plugins>

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>wagon-maven-plugin</artifactId>
            <version>1.0-beta-3</version>
            <executions>
                <execution>
                    <id>upload-ear</id>
                    <phase>deploy</phase>
                    <goals>
                        <goal>upload</goal>
                    </goals>
                    <configuration>
                        <fromFile>${project.build.directory}/${project.build.finalName}.ear</fromFile> 
                        <url>scp://servername/</url>
                        <toDir>.</toDir>
                    </configuration>
                </execution>
            </executions>
        </plugin>
....

有人可以解释一下我是如何做到这一点的吗？

Answer 1

您当前的配置遵循Usage页面中给出的示例，并且是正确的。但是，在此示例中，configuration元素在execution内声明，因此仅适用于此特定execution。

因此，当您在命令行上调用mvn wagon:upload-single时，configuration未被“使用”，并且确实没有配置url参数。

如果要从命令行调用插件，请使用-Durl=foo等命令行传递参数，或者添加“全局”configuration元素：

<build>
  <extensions>
    <extension>
      <groupId>org.apache.maven.wagon</groupId>
      <artifactId>wagon-ssh</artifactId>
      <version>1.0-beta-6</version>
    </extension>
  </extensions>  

  <plugins>   
    <plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>wagon-maven-plugin</artifactId>
      <version>1.0-beta-3</version>
      <configuration>
        <fromFile>${project.build.directory}/${project.build.finalName}.ear</fromFile> 
        <url>scp://servername/</url>
        <toDir>.</toDir>
      </configuration>
      ...
    </plugin>
    ...
  </plugins>
  ...
</build>

Answer 2

您可以使用 pom.xml 上的配置运行以下命令来运行插件：

mvn org.codehaus.mojo:wagon-maven-plugin:upload@upload-ear

使用Maven通过SCP上传文件失败

2 个答案: