试图让 antrun 插件工作：
为了让它工作，我假设我需要在 pom.xml 中包含两个条目：
依赖：
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
</dependency>
和插件：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<phase>package</phase>
<configuration>
<target name="usage">
<echo message="This is how this target is used!"/>
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
我不知道要指定哪个阶段（我只想要一个独立的进程将我的工件推送到远程服务器 - 这就是 antrun 插件 AFAIK 的目的，无论如何。我的目的是使用这些 ant 目标作为一种方式轻松将我的整个构建从 Ant 迁移到 Maven）。我的 antrun 目标是否必须作为阶段的一部分运行？
当我尝试从 STS（debug on）运行这个（'org.apache.maven.plugins:maven-antrun-plugin:antrun:1.7:package'）时，我得到以下输出：
Apache Maven 3.0.4 (r1232337; 2012-01-17 10:44:56+0200)
Maven home: /home/juser/dev/workspace-sts-3.1.0.RELEASE/sagerbe-maven-trial-4/EMBEDDED
Java version: 1.7.0_21, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.2.0-45-generic", arch: "amd64", family: "unix"
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from EMBEDDED/conf/settings.xml
[DEBUG] Reading user settings from /home/juser/.m2/settings.xml
[DEBUG] Using local repository at /home/juser/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /home/juser/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project org.sagerbe:web:war:1.0.0-BUILD-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging war from ClassRealm[plexus.core, parent: null]
[WARNING] The POM for org.apache.maven.plugins:maven-antrun-plugin:jar:antrun is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.144s
[INFO] Finished at: Thu Jun 20 10:14:39 SAST 2013
[INFO] Final Memory: 6M/111M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-antrun-plugin:antrun or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-antrun-plugin:jar:antrun: Failure to find org.apache.maven.plugins:maven-antrun-plugin:pom:antrun in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]
org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-antrun-plugin:antrun or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-antrun-plugin:jar:antrun
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:129)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:142)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getMojoDescriptor(DefaultMavenPluginManager.java:261)
at org.apache.maven.plugin.DefaultBuildPluginManager.getMojoDescriptor(DefaultBuildPluginManager.java:185)
at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.getMojoDescriptor(MojoDescriptorCreator.java:235)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:106)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:86)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:98)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.sonatype.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.apache.maven.plugins:maven-antrun-plugin:jar:antrun
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:296)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:186)
at org.sonatype.aether.impl.internal.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:279)
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:115)
... 20 more
Caused by: org.sonatype.aether.resolution.ArtifactResolutionException: Failure to find org.apache.maven.plugins:maven-antrun-plugin:pom:antrun in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:538)
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:216)
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:193)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:281)
... 23 more
Caused by: org.sonatype.aether.transfer.ArtifactNotFoundException: Failure to find org.apache.maven.plugins:maven-antrun-plugin:pom:antrun in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced
at org.sonatype.aether.impl.internal.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:230)
at org.sonatype.aether.impl.internal.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:204)
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:427)
... 26 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
上面提到的 'PluginResolutionException' wiki 页面提供了一些建议，但我并不明智。（我可以在我的本地 m2 存储库中看到插件目录和文件，所以如果它无法从中央 maven 存储库下载它，为什么它不在我的本地存储库中查找？）
当我查看“~/.m2/repository/org/apache/maven/plugins/maven-antrun-plugin/1.7”时，我看到了这些文件：
- m2e-lastUpdated.properties
- maven-antrun-plugin-1.7.jar.sha1
- maven-antrun-plugin-1.7.pom.sha1
- maven-antrun-plugin-1.7.jar
- maven-antrun-plugin-1.7.pom
- _maven.repositories
...所以这肯定意味着我满足了 jar 依赖项和 pom 文件要求。
我应该配置代理吗？如果是这样，为什么？代理配置的目的是什么？