如何强制 Maven 使用我的本地存储库而不是去远程存储库检索工件? [英] How do I force Maven to use my local repository rather than going out to remote repos to retrieve artifacts?
问题描述
我在 Mac Yosemite 上使用 Maven 3.3.3 和 Java 8.我有一个多模块项目.
I’m using Maven 3.3.3 with Java 8 on Mac Yosemite. I have a multi-module project.
<modules>
<module>first-module</module>
<module>my-module</module>
…
</modules>
当我使用mvn clean install"从上面构建我的一个子模块时，例如my-module"，构建尝试从我在我的 ~ 中定义的远程存储库中下载子模块工件/.m2/settings.xml 文件.输出低于
When I build my one of my child modules, for example, "my-module" from above, using "mvn clean install", the build attempts to download the child module artifacts from a remote repository I have defined in my ~/.m2/settings.xml file. Output is below
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building my-module 87.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml
Downloading: http://download.java.net/maven/2/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml
Downloaded: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml (788 B at 0.9 KB/sec)
Downloading: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/first-module-87.0.0-20151104.200545-4.pom
在尝试从远程存储库下载之前，如何强制 Maven 首先检查我的本地 ~/.m2/repository?下面是我在 ~/.m2/settings.xml 文件中定义远程存储库的位置……
How do I force Maven to check my local ~/.m2/repository first before trying to download from the remote repositories? Below is where I have my remote repositories defined in my ~/.m2/settings.xml file …
<profile>
<id>releases</id>
<activation>
<property>
<name>!releases.off</name>
</property>
</activation>
<repositories>
<repository>
<id>releases</id>
<url>https://my.remoterepository.com/nexus/content/repositories/releases/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</profile>
<profile>
<id>snapshots</id>
<activation>
<property>
<name>!snapshots.off</name>
</property>
</activation>
<repositories>
<repository>
<id>snapshots</id>
<url>https://my.remoterepository.com/nexus/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
</profile>
为了回应说当工件不存在时下载发生的答案，下面是我证明文件在我的仓库中的终端输出，但 Maven 正在尝试无论如何下载它...
In response to the answer saying that the download occurs when the artifact is not there, below is the terminal output in which I prove the file was there in my repo but Maven is trying to download it anyway ...
Daves-MacBook-Pro-2:my-module davea$ ls -al ~/.m2/repository/org/mainco/subco/first-module/87.0.0-SNAPSHOT/first-module-87.0.0-SNAPSHOT.jar
-rw-r--r-- 1 davea staff 10171 Nov 5 10:22 /Users/davea/.m2/repository/org/mainco/subco/first-module/87.0.0-SNAPSHOT/first-module-87.0.0-SNAPSHOT.jar
Daves-MacBook-Pro-2:my-module davea$ mvn clean install
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.mainco.subco:my-module:jar:87.0.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.apache.maven.plugins:maven-antrun-plugin @ org.mainco.subco:my-module:[unknown-version], /Users/davea/Documents/sb_workspace/my-module/pom.xml, line 678, column 12
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building my-module 87.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml
Downloading: http://download.java.net/maven/2/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml
Downloaded: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/maven-metadata.xml (788 B at 0.8 KB/sec)
Downloading: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/first-module-87.0.0-20151106.043202-8.pom
Downloaded: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/first-module/87.0.0-SNAPSHOT/first- module-87.0.0-20151106.043202-8.pom (3 KB at 21.9 KB/sec)
Downloading: http://download.java.net/maven/2/org/mainco/subco/subco/87.0.0-SNAPSHOT/maven-metadata.xml
Downloading: https://my.remoterepository.com/nexus/content/repositories/snapshots/org/mainco/subco/subco/87.0.0-SNAPSHOT/maven-metadata.xml
推荐答案
依赖项有一个快照版本.对于快照，Maven 将检查本地存储库，如果在本地存储库中找到的工件太旧，它将尝试在远程存储库中找到更新的工件.这可能就是您所看到的.
The dependency has a snapshot version. For snapshots, Maven will check the local repository and if the artifact found in the local repository is too old, it will attempt to find an updated one in the remote repositories. That is probably what you are seeing.
请注意，此行为由 updatePolicy 指令(快照存储库默认为 daily).
Note that this behavior is controlled by the updatePolicy directive in the repository configuration (which is daily by default for snapshot repositories).
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