为什么在构建此项目时出现 "No assembly descriptors found." 错误?

Why do I get "No assembly descriptors found." error while building this project?

我有一点 project 用 Kotlin 写的。当我 运行 clean compile assembly:single install 时,我收到以下错误消息:

Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single 
(default-cli) on project alma-econsim: Error reading assemblies: No assembly 
descriptors found. -> [Help 1]

我的 jar-with-dependencies.xml 位于 src/main/assembly and referenced in pom.xml 是这样的:

<plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.2-beta-5</version>
    <executions>
        <execution>
            <id>assembly</id>
            <goals>
                <goal>single</goal>
            </goals>
            <phase>package</phase>
            <configuration>
                <descriptors>
                    <descriptor>src/main/assembly/jar-with-dependencies.xml</descriptor>
                </descriptors>
            </configuration>
        </execution>
    </executions>
</plugin>

但我仍然得到错误。如何更正我的项目以便能够将其打包为具有依赖项的 jar?

首先使用 maven-assembly-plugin 的最新版本,而不是旧版本...此外,您应该通过 mvn clean package 调用它,因为您将 maven-assembly-plugin 绑定到 package 生命周期阶段......如果你尝试做 mvn ... assembly:single 你不是在调用生命周期......除此之外你想使用 jar-with-dependencies 描述符而不是你应该这样做:

<project>
  [...]
  <build>
    [...]
    <plugins>
      <plugin>
        <!-- NOTE: We don't need a groupId specification because the group is
             org.apache.maven.plugins ...which is assumed by default.
         -->
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.6</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
        [...]
</project>

除此之外,如果您这样调用 Maven:

mvn clean compile assembly:single install

比你把编译阶段称为双倍,因为只是一个:

mvn clean install 

足够了。我可以推荐阅读 build life doc.