Nexus不会从默认公共组服务快照

Question

出于某种原因,我无法让Nexus通过默认公共组服务我的SNAPSHOT工件.我已经阅读了Nexus手册的相关内容并搜索了Google,但我所做的一切似乎都无法解决.

我在第4.2节中实现了这些内容.(配置Maven使用单个Nexus组)本手册,所以我的settings.xml如下所示:

<settings>

  <mirrors>
    <mirror>
      <id>nexus</id>
      <mirrorOf>*</mirrorOf>
      <url>http://my-server/nexus/content/groups/public</url>
    </mirror>
  </mirrors>

  <profiles>
    <profile>
      <id>nexus</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <repositories>
        <repository>
          <id>central</id>
          <url>http://central</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>central</id>
          <url>http://central</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>

</settings>

一切都工作正常,直到我开始在干净的机器上构建东西(即我没有构建任何SNAPSHOT项目的东西)并且它不会下载所需的SNAPSHOT依赖项.Maven给了我以下内容:

[INFO] Scanning for projects...
[INFO]       
[INFO] ------------------------------------------------------------------------
[INFO] Building MyCo Actions Base Classes 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://my-sever/nexus/content/groups/public/com/myco/testing/1.0.0-SNAPSHOT/maven-metadata.xml
Downloading: http://my-sever/nexus/content/groups/public/com/myco/testing/1.0.0-SNAPSHOT/maven-metadata.xml
Downloading: http://my-sever/nexus/content/groups/public/com/myco/testing/1.0.0-SNAPSHOT/testing-1.0.0-SNAPSHOT.pom
[WARNING] The POM for com.myco:testing:jar:1.0.0-SNAPSHOT is missing, no dependency information available
Downloading: http://my-sever/nexus/content/groups/public/com/myco/testing/1.0.0-SNAPSHOT/testing-1.0.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.023s
[INFO] Finished at: Tue Mar 08 15:55:23 GMT 2011
[INFO] Final Memory: 99M/480M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project actions-base: Could not resolve dependencies for project com.myco:actions-base:jar:1.0.0-SNAPSHOT: Could not find artifact com.myco:testing:jar:1.0.0-SNAPSHOT in nexus (http://my-sever/nexus/content/groups/public) -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[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/DependencyResolutionException

问题是testing-1.0.0-SNAPSHOT.jar不存在,但是测试-1.0.0-20110301.182820-1.jar确实存在.如何让Nexus正确解决SNAPSHOT并为我服务JAR ......？

Answer 1

我最终得到这一切的工作我从公共组中删除本地版本和快照存储库和使反光镜,只有反映公众群体,而不是一切.所以我的settings.xml最终包含:

  <profiles>
    <profile>
      <id>nexus</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <repositories>
        <repository>
          <id>maven-releases</id>
          <url>http://myhost.com/nexus/content/repositories/releases</url>
          <layout>default</layout>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
        <repository>
          <id>maven-snapshots</id>
          <url>http://myhost.com/nexus/content/repositories/snapshots</url>
          <layout>default</layout>
          <releases>
            <enabled>false</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>        
        <repository>
          <id>madeUp</id>
          <url>http://central</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>madeUp</id>
          <url>http://central</url>
          <releases>
            <enabled>true</enabled>
          </releases>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>

  <mirrors>
    <mirror>
      <id>nexus</id>
      <mirrorOf>madeUp</mirrorOf>
      <url>http://myhost.com/nexus/content/groups/public</url>
    </mirror>
  </mirrors>

Answer 2

配置nexus作为镜像时,同样的问题.将所有存储库(发布和快照)添加到Public Repository组后,您可以通过浏览相应的URL找到所有快照:

但是maven无论如何都会失败从镜像中获取快照,如本主题所述.它接缝maven不会从镜像中检索快照,直到你明确告诉它这样做.作为一个解决方案,我添加了相同的URL作为存储库 -Tag,它只是按预期工作:

<settings>

<mirrors>
    <mirror>
        <id>nexus-mirror</id>
        <name>Nexus Mirror</name>
        <url>http://my-server/nexus/content/groups/public/</url>
        <mirrorOf>*</mirrorOf>
    </mirror>
</mirrors>

<profiles>
    <profile>
        <activation>
            <activeByDefault>true</activeByDefault>
        </activation>
        <repositories>
            <repository>
                <id>nexus-public</id>
                <name>Nexus Public Repository</name>
                <url>http://my-server/nexus/content/groups/public/</url>
                <releases>
                    <enabled>true</enabled>
                </releases>
                <snapshots>
                    <enabled>true</enabled>
                    <updatePolicy>always</updatePolicy>
                </snapshots>
            </repository>
        </repositories>
    </profile>
</profiles>

</settings>

即使将updatePolicy -Tag设置为整个镜像也没有任何问题.由于maven足够聪明,只能更新每个构建中的快照,而不是更新版本.