Java Maven：从多模块项目中只构建一个模块
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Maven: Build only one module out of multi-module project
提问by sangupta
I have a multi-module Maven project wherein I just want to release an update module rather than the entire project. This is due to some specific requirements, wherein a release of entire project is uncalled for - only a subset of the library needs the fixes and thus the release.
我有一个多模块 Maven 项目，我只想发布一个更新模块而不是整个项目。这是由于某些特定要求，其中不需要发布整个项目 - 只有库的一个子集需要修复，因此需要发布。
However, when I run a mvn release:prepareI get the following error Non-resolvable parent POM- I have setup the parent POM relationship in the module project with relativePathtag but that does not seem to work.
但是，当我运行 a 时，出现mvn release:prepare以下错误Non-resolvable parent POM- 我在模块项目中设置了带有relativePath标签的父 POM 关系，但这似乎不起作用。
Is it possible to release only a module rather than releasing the entire project.
是否可以只发布一个模块而不是发布整个项目。
Thanks in advance.
提前致谢。
EDIT
编辑
Parent pom
父 pom
<groupId>com.domain</groupId>
<artifactId>project-parent</artifactId>
<version>0.5.1-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>library1</module>
<module>library2</module>
<module>library3</module>
</modules>
The module POMs are as under:
模块 POM 如下：
<parent>
<groupId>com.domain></groupId>
<artifactId>project-parent</artifactId>
<version>0.5.1-SNAPSHOT</version>
</parent>
<artifactId>library1</artifactId>
Now I just want to release the new version of library1 and not others
现在我只想发布 library1 的新版本而不是其他版本
回答by matt b
Try running the maven commands from the parent project/directory with the -pl <project name>switch.
尝试从与父项目/目录下运行Maven的命令的-pl <project name>开关。
回答by Konstantin
I think maven is trying to tell you that the parent you defined is not released/stable. In your pom the parent version is "0.5.1-SNAPSHOT" which can not/should not work if you want to release a single library module as it would be pointing to something that is not uniquely defined. Is there a stable version you can point to instead? Otherwise maybe the -am switch works in combination with -pl?
我认为 maven 试图告诉您您定义的父级未发布/稳定。在你的 pom 中，父版本是“0.5.1-SNAPSHOT”，如果你想发布一个库模块，它不能/不应该工作，因为它会指向没有唯一定义的东西。是否有您可以指向的稳定版本？否则也许 -am 开关与 -pl 结合使用？
Edit
编辑
I tried this just now with maven 3.2 and it does ask me for what version the parent should be set/resolved to. It is as I stated previously you need stable version numbers for the release to work
我刚刚用 maven 3.2 尝试过这个，它确实问我应该将父级设置/解析为哪个版本。正如我之前所说，您需要稳定的版本号才能使发行版正常工作
mvn release:prepare -pl library1
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building library1 1.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-release-plugin:2.3.2:prepare (default-cli) @ library1 ---
[INFO] Verifying that there are no local modifications...
[INFO] ignoring changes on: **\release.properties, **\pom.xml.next, **\pom.xml.releaseBackup, **\pom.xml.backup, **\pom.xml.branch, **\pom.xml.tag [INFO] Executing: cmd.exe /X /C "git status"
[INFO] Working directory: C:\temp\mavenTest\library1
[INFO] Checking dependencies and plugins for snapshots ...
There are still some remaining snapshot dependencies.
: Do you want to resolve them now? (yes/no) no: : yes
Dependency type to resolve,: specify the selection number ( 0:All 1:Project Dependencies 2:Plugins 3:Reports 4:Extensions ): (0/1/2/3) 1: : 1
Dependency 'testme:parent' is a snapshot (1.1-SNAPSHOT)
: Which release version should it be set to? 1.1: :
回答by Gene
mvn -pl .,library1 clean install
The "." will build your parent pom.xml and "library1" is the module name you gave it.
这 ”。” 将构建您的父 pom.xml，“library1”是您给它的模块名称。
If you don't want to build the parent pom.xml, you can also do:
如果你不想构建父 pom.xml，你也可以这样做：
mvn -pl library1 clean install
or in your case, maybe:
或者在你的情况下，也许：
mvn -pl library1 deploy
I used "deploy" because "release" is not a Maven build lifecycle phase.
我使用“部署”是因为“发布”不是 Maven 构建生命周期阶段。
回答by mmoossen
the trick is both:
诀窍是：
- to repeat the -pl Param inside an additional -Darguments Param, to pass the -pl Param to the Child-Maven-Processes
- the mysterious mavenExecutor, to be able to create the Child-Maven-Processes using the given -pl Param
- 在附加的 -Darguments 参数中重复 -pl 参数，将 -pl 参数传递给 Child-Maven-Processes
- 神秘的 mavenExecutor，能够使用给定的 -pl Param 创建 Child-Maven-Processes
This should work:
这应该有效：
mvn -pl library1 -DmavenExecutorId=forked-path -Darguments="-pl library1"
