Maven组装-读取组装时出错 [英] Maven assembly - Error reading assemblies
问题描述
我已经定义了一个个性化的jar-with-dependency程序集描述符.但是，当我用mvn assembly:assembly执行它时，我得到了:
I have defined a personalized jar-with-dependencies assembly descriptor. However, when I execute it with mvn assembly:assembly, I get :
...
[INFO] META-INF/ already added, skipping
[INFO] META-INF/MANIFEST.MF already added, skipping
[INFO] javax/ already added, skipping
[INFO] META-INF/ already added, skipping
[INFO] META-INF/MANIFEST.MF already added, skipping
[INFO] META-INF/maven/ already added, skipping
[INFO] [assembly:assembly {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error reading assemblies: No assembly descriptors found.
我的 jar-with-dependencies.xml 在 src/main/resources/assembly/中.
我的程序集描述符如下:
My assembly descriptor is the following :
<?xml version='1.0' encoding='UTF-8'?>
<assembly>
<id>jar-with-dependencies</id>
<formats>
<format>jar</format>
</formats>
<dependencySets>
<dependencySet>
<scope>runtime</scope>
<unpack>true</unpack>
<unpackOptions>
<excludes>
<exclude>**/LICENSE*</exclude>
<exclude>**/README*</exclude>
</excludes>
</unpackOptions>
</dependencySet>
</dependencySets>
<fileSets>
<fileSet>
<directory>${project.build.outputDirectory}</directory>
<outputDirectory>/</outputDirectory>
</fileSet>
<fileSet>
<directory>src/main/resources/META-INF/services</directory>
<outputDirectory>META-INF/services</outputDirectory>
</fileSet>
</fileSets>
</assembly>
我的项目pom.xml是:
And my project pom.xml is :
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
<executions>
<execution>
<id>jar-with-dependencies</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<descriptors>
<descriptor>jar-with-dependencies.xml</descriptor>
</descriptors>
<archive>
<manifest>
<mainClass>org.my.app.HowTo</mainClass>
</manifest>
</archive>
</configuration>
</execution>
</executions>
</plugin>
执行mvn assembly:assembly时，将解压缩依赖项，并且在解压缩完成后出现上一个错误.
When mvn assembly:assembly is performed, dependencies are unpacked and I get the previous error when unpack has finished.
此外，如果我执行mvn -e assembly:assembly，则说明未找到任何描述符，但是它尝试解压缩依赖项并创建具有依赖项的JAR，但其中不包含META-INF/services/*如描述符中所指定:
Moreover, if I execute mvn -e assembly:assembly it is say that no descriptors has been found, however it try to unpack dependencies and a JAR with dependencies is created but it doesn't contain META-INF/services/* as specified in descriptor :
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error reading assemblies: No assembly descriptors found.
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error reading assemblies: No assembly descriptors found.
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:284)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
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.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error reading assemblies: No assembly descriptors found.
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:356)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
Caused by: org.apache.maven.plugin.assembly.io.AssemblyReadException: No assembly descriptors found.
at org.apache.maven.plugin.assembly.io.DefaultAssemblyReader.readAssemblies(DefaultAssemblyReader.java:206)
at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:352)
... 19 more
我没有看到我的错误.有人有解决方案吗?
I don't see my error. Does someone has a solution ?
推荐答案
这里有两个问题.首先，在使用自己的描述符时，必须指定自定义描述符文件的路径(顺便说一下，您可以使用任何位置，但是将描述符放在src/main/resources中可能不是最佳选择，您真的不希望将描述符打包在您的应用程序中，我会使用
There are two problems here. First, when using your own descriptor, you must specify the path to your customized descriptor file (by the way, you can use any location but putting the descriptor in src/main/resources is maybe not the best choice, you don't really want the descriptor to be packaged in your application, I'd use the standard location which is src/main/assembly as mentioned in this page).
<descriptors>
<descriptor>src/main/assembly/jar-with-dependencies.xml</descriptor>
</descriptors>
第二，您的configuration元素当前位于execution块中，因此特定于 this 执行.换句话说，如果您在命令行上运行assembly:assembly，则它将不适用.因此，如果要使用自定义描述符调用assembly:assembly，请使用:
Second, your configuration element is currently inside an execution block and is thus specific to this execution. In other words, it won't apply if you run assembly:assembly on the command line. So, if you want to call assembly:assembly with a custom descriptor, either use:
mvn assembly:assembly -Ddescriptor=path/to/descriptor.xml
或将configuration移到execution元素之外(以使配置全局):
Or move the configuration outside the execution element (to make the configuration global):
<project>
...
<build>
...
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
<configuration>
<descriptors>
<descriptor>path/to/descriptor.xml</descriptor>
</descriptors>
...
</configuration>
</plugin>
</plugins>
...
</build>
...
</project>
这篇关于Maven组装-读取组装时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
