Maven按顺序构建所有 [英] Maven build all in order

问题描述

我有一个项目，其中我所有的项目都具有如下定义的父pom:

I have a project where all of my projects have a parent pom defined like this:

<parent>
    <groupId>MyProject</groupId>
    <artifactId>MyApp</artifactId>
    <version>1.0</version>
</parent>

但是，此父pom未在modules元素中指定模块.

However, this parent pom does NOT specify the modules in a modules element.

因此，当我运行mvn install -f parent/pom.xml命令时，它什么也没做.

So when I run the mvn install -f parent/pom.xml command it doesn't do anything.

还有其他一些方法可以按顺序构建整个项目 以便构建所有pom吗?

Is there some OTHER way I can build the entire project In Order so that all of the poms are built?

按顺序"是指按依存关系建立".因为几个项目依赖于其他项目，所以我们不能只是按字母顺序构建每个项目.

By "in order" i mean "built in order of dependency". Because several projects depend on others, we can't just build each project alphabetically.

推荐答案

如果您有反应器pom (具有<modules>元素且<packaging>定义为pom的pom)然后将按照依赖关系顺序构建模块.无论在pom中指定模块的顺序如何，都会发生这种排序.

If you have a reactor pom (a pom with the <modules> element, and <packaging> defined as pom) then the modules will be built in dependency order. This ordering happens regardless of the order the modules are specified in the pom.

有几种方法可以解决这个问题:

There's a few ways to approach this:

选项1

您的反应堆pom不必与父pom是相同的pom.因此，您可以:

Your reactor pom doesn't need to be the same pom as your parent pom. So you could have:

project/pom.xml          # Reactor pom with <modules> element
project/parent/pom.xml   # Parent pom
project/module-a/pom.xml # Some module 'a'
project/module-b/pom.xml # Some module 'b'

在这种情况下，反应堆pom包含:

In this case, the reactor pom contains:

<modules>
  <module>parent</module>
  <module>module-a</module>
  <module>module-b</module>
</modules>

在顶层运行mvn install会构建您的父pom，并按照依赖关系顺序构建两个模块.

Running mvn install at the top level will build your parent pom, and the two modules in dependency order.

选项2

将父pom移到一个目录中，并将其用作父pom和反应堆pom，因此您的项目如下所示:

Move your parent pom up a directory, and use it as both a parent pom and a reactor pom, so your project looks like this

project/pom.xml          # Parent/Reactor pom with <modules> element
project/module-a/pom.xml # Some module 'a'
project/module-b/pom.xml # Some module 'b'

其中的模块部分看起来像这样

The modules section in it would look like this

<modules>
  <module>module-a</module>
  <module>module-b</module>
</modules>

同样，在顶层运行mvn install将会构建您的父pom，并且将两个模块按依赖关系顺序构建.

Again, running mvn install at the top level will build your parent pom, and the two modules in dependency order.

选项3

将父pom保留在其中，并添加一个模块部分:

Leave your parent pom where it is, and add a modules section:

<modules>
  <module>../module-a</module>
  <module>../module-b</module>
</modules>

在这种情况下，运行mvn install -f parent/pom.xml将构建父pom，并按依赖关系顺序构建两个模块.

In this case, running mvn install -f parent/pom.xml will build the parent pom, and the two modules in dependency order.

结论

我通常使用Option2.这是Maven本身最常用的模式，并且我尽量避免偏离已经被广泛理解和测试的老路".

I normally use Option 2. It's the pattern that's most used in maven itself, and I try to avoid straying too far from the 'beaten path', which is widely understood and tested.

有关更多信息，请参见使用多个模块的指南.

For more information, see the Guide to Working with Multiple Modules.

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