Maven jar插件 - SNAPSHOT依赖项的错误的Class-Path条目

Question

我正在使用maven-jar-plugin构建jar maven-assembly-plugin并将所有依赖项放在JARin lib/目录旁边.

如果我使用此项目的快照依赖项,则Class-Path入口点会执行不同JAR的依赖项,然后是实际的打包项.

这是一个例子:

<dependency>
    <groupId>x.y.z</groupId>
    <artifactId>artifact</artifactId>
    <version>1.0-SNAPSHOT</version>
</dependency>

JAR被打包为依赖INTI libdirecotyr是 artifact-1.0-SNAPSHOT,但Class-Path在主入口JAR小号表现为lib/artifact-1.0-20170201.104414-8.jar

这里发生了什么,为什么？

提前致谢.

我的assembly.xml

<dependencySets>
    <dependencySet>
        <useProjectArtifact>false</useProjectArtifact>
        <useTransitiveDependencies>true</useTransitiveDependencies>
        <outputDirectory>lib</outputDirectory>
        <unpack>false</unpack>
    </dependencySet>
</dependencySets>

插件:

    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.2.2</version>
        <executions>
            <execution>
                <id>assembly</id>
                <phase>package</phase>
                <goals>
                    <goal>attached</goal>
                </goals>
                <configuration>
                    <outputDirectory>${project.build.directory}</outputDirectory>
                    <finalName>${dist.name}</finalName>
                    <appendAssemblyId>false</appendAssemblyId>
                    <descriptor>${basedir}/assembly.xml</descriptor>
                </configuration>
            </execution>
        </executions>
    </plugin>
    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <version>2.3.1</version>
        <configuration>
            <archive>
                <manifest>
                    <addClasspath>true</addClasspath>
                    <classpathPrefix>lib/</classpathPrefix>
                </manifest>
                <manifestEntries>
                    <Class-Path>.</Class-Path>
                </manifestEntries>
            </archive>
            <outputDirectory>${dist.dir}</outputDirectory>
        </configuration>
        <executions>
            <execution>
                <goals>
                    <goal>test-jar</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

Answer 1

您已被MJAR-156击中,目前尚未解决最新的3.0.2.核心问题是下游的Maven Archiver库,很可能是MSHARED-169.

通过指定Maven Archiver不为快照创建唯一版本,您可以非常轻松地解决这个问题.这由useUniqueVersions清单配置下的参数控制,默认为true.因此,您可以将Jar插件的配置更改为:

<plugin>
  <artifactId>maven-jar-plugin</artifactId>
  <version>3.0.2</version>
  <configuration>
    <archive>
      <manifest>
        <addClasspath>true</addClasspath>
        <classpathPrefix>lib/</classpathPrefix>
        <useUniqueVersions>false</useUniqueVersions>
      </manifest>
      <!-- rest of configuration -->
    </archive>
    <outputDirectory>${dist.dir}</outputDirectory>
  </configuration>
  <!-- the executions -->
</plugin>

请注意,Jar插件的2.3.1版本已经很老了,您应该考虑更新到最新的3.0.2.