为什么Maven错误地将快照上传到发布存储库？

Question

我正在尝试使用maven-deploy-plugin将版本和快照上传到Nexus存储库。然而，我遇到了这个错误

[INFO] [deploy:deploy {execution: default-deploy}]
[INFO] Retrieving previous build number from nexus
Uploading: http://localhost:8081/nexus/content/repositories/snapshots/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120605.140242-20.jar
56K uploaded  (edr-app-1.0.4-20120605.140242-20.jar)
[INFO] Uploading project information for edr-app 1.0.4-20120605.140242-20
[INFO] Retrieving previous metadata from nexus
[INFO] Uploading repository metadata for: 'artifact info.afilias.edr:edr-app'
[INFO] Retrieving previous metadata from nexus
[INFO] Uploading repository metadata for: 'snapshot info.afilias.edr:edr-app:1.0.4-SNAPSHOT'
[INFO] Retrieving previous build number from nexus
Uploading: http://localhost:8081/nexus/content/repositories/snapshots/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120605.140242-20.tar.gz
4286K uploaded  (edr-app-1.0.4-20120605.140242-20.tar.gz)
[INFO] [deploy:deploy-file {execution: default}]
Uploading: http://localhost:8081/nexus/content/repositories/releases/info/afilias/edr/edr-app/1.0.4/edr-app-1.0.4.tar.gz
89530K uploaded  (edr-app-1.0.4.tar.gz)
[INFO] Uploading project information for edr-app 1.0.4
[INFO] Retrieving previous metadata from remote-repository
[INFO] Uploading repository metadata for: 'artifact info.afilias.edr:edr-app'
[INFO] Retrieving previous build number from remote-repository
[INFO] repository metadata for: 'snapshot info.afilias.edr:edr-app:1.0.4-SNAPSHOT' could not be found on repository: remote-repository, so will be created
Uploading: http://localhost:8081/nexus/content/repositories/releases/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120605.140242-20.tar.gz
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error deploying attached artifact /home/mren/trunk2/target/edr-app-1.0.4-SNAPSHOT.tar.gz: Error deploying artifact: Failed to transfer file: http://localhost:8081/nexus/content/repositories/releases/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120605.140242-20.tar.gz. Return code is: 400

下面是我在pom.xml中的配置：

<project>
 ...
    <distributionManagement>
       <repository>
          <id>releases</id>
          <name>Releases</name>
          <url>http://localhost:8081/nexus/content/repositories/releases</url>
        </repository>
        <snapshotRepository>
          <id>snapshots</id>
          <name>Snapshots</name>
          <url>http://localhost:8081/nexus/content/repositories/snapshots</url>
        </snapshotRepository>
      </distributionManagement>
  ...
  <build>
   ...
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.7</version>
        <executions>
          <execution>
            <phase>deploy</phase>
            <goals>
              <goal>deploy-file</goal>
            </goals>
            <configuration>
              <file>target/edr-install-1.0.4-${revision}.tar.gz</file>
              <url>${project.distributionManagement.repository.url}</url>
              <packaging>tar.gz</packaging>
              <artifactId>artifactId</artifactId>
              <groupId>groupId</groupId>
              <version>1.0.4-${revision}</version>
            </configuration>
          </execution>
        </executions>
      </plugin>
   ...
  </build>
...
</project>

从我的settings.xml文件中：

<settings>
  <server>
      <id>releases</id>
      <username>admin</username>
      <password>admin123</password>
    </server>
    <server>
      <id>snapshots</id>
      <username>admin</username>
      <password>admin123</password>
    </server>
  </servers>
  <profiles>
    <profile>
      <id>nexus</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <repositories>
        <repository>
          <id>releases</id>
          <name>Releases</name>
          <url>http://localhost:8081/nexus/content/repositories/releases</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
        <repository>
          <id>snapshots</id>
          <name>Snapshots</name>
          <url>http://localhost:8081/nexus/content/repositories/snapshots</url>
          <releases>
            <enabled>false</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
      </repositories>
      </profile>
  </profiles>
</settings>

我确信这个配置曾经有效，但是现在它产生了一个错误。不确定出了什么问题。

并且节点日志告诉我，它正在尝试将快照上载到发布库中

jvm 1    | 2012-06-04 14:16:31 INFO  [tp1706427008-35] - org.sonatype.nexus.proxy.maven.maven2.M2Repository - Storing of item releases:/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120604.181534-1.tar.gz is forbidden by Maven Repository policy. Because releases is a RELEASE repository
jvm 1    | 2012-06-04 14:16:31 ERROR [tp1706427008-35] - org.sonatype.nexus.rest.ContentPlexusResource - Got exception during processing request "PUT http://localhost:8081/nexus/content/repositories/releases/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120604.181534-1.tar.gz": Storing of item releases:/info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120604.181534-1.tar.gz is forbidden by Maven Repository policy. Because releases is a RELEASE repository

Answer 1

您的settings.xml不正确。请将Maven配置为使用Nexus correctly following the book chapter.，特别是使用镜像设置和其中的url，而不是存储库和pluginRepository的特定url。

它会干扰您正确的Maven pom，并最终尝试将快照部署到发布库中，这是不正确的。

此外，使用正确的目标/命令也很重要。不要直接使用部署文件目标。

只需运行该命令

mvn clean deploy

在构建中。

还有另一个澄清。Maven将部署由版本决定的任何内容。如果它以-SNASPHOT结尾，则它是一个开发版本并被发布到快照存储库(并且将允许重新部署递增版本号)，如果它不是，它被认为是一个发行版，并将被部署到发布存储库。一个项目不能同时是快照和发布。这是一个或另一个。

不要混淆发布和快照这两个概念！

在部署额外的工件方面，如果它们没有关联，我会将它们拉到一个单独的项目/模块中，或者如果它们是关联的，我会查看构建助手插件的附加工件目标。

Answer 2

这是因为您正在告诉Maven部署一个看起来像快照的文件。看一下您的deploy:deploy-file配置。${revision}与快照具有相同的格式，因此Nexus对其执行nack：

目标/edr-.tar.gz-1.0.4-${revision}版本变为: info/afilias/edr/edr-app/1.0.4-SNAPSHOT/edr-app-1.0.4-20120605.140242-20.tar.gz

作为参考，Maven和Nexus用来决定快照是什么/不是什么的正则表达式在这里介绍：http://www.sonatype.com/people/2008/05/maven-code-how-to-detect-if-you-have-a-snapshot-version/

我推荐的另一件事是不要使用deploy:deploy- tar.gz，而是使用buildhelper:attach来附加这个文件，这样文件就会被恰当地命名，从而避免你对修订版本所做的所有修改。