构建Maven的多模块项目的顺序？ [英] Build order of Maven multimodule project?

问题描述

的情况是，我有相同的结构中的两个Maven的多模块项目：

亲
     - 模块1
     - 模块2

当我建项目1项，我看到父母先建（顺序为父 - > module1->模块2 ）。然而，对于项目2项，父终于建成（顺序为 module1-> module2->父）。为什么这两个项目有不同的建造顺序？此外，我怎么能手动控制生成顺序？

更新1：结果
两家母公司的项目是没有源$ C ​​$ C简单的POM项目，所以我无法解释构建顺序按依赖关系图。

更新2：结果
父POM的是，除了GAV和子模块名称相同的：

＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT;项目的xmlns =htt​​p://maven.apache.org/POM/4.0.0的xmlns：XSI =htt​​p://www.w3.org/2001/XMLSchema-instanceXSI：=的schemaLocationHTTP： //maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd\">
    ＆LT; modelVersion＆GT; 4.0.0＆LT; / modelVersion＆GT;
    ＆LT;＆的groupId GT;父组ID＆LT; /的groupId＆GT;
    ＆LT;＆的artifactId GT;家长神器-ID＆LT; / artifactId的＆GT;
    ＆LT;＆版GT;亲子版＆LT; /版本＆GT;
    ＆LT;包装和GT; POM＆LT; /包装＆GT;
    ＆LT;名称＆gt;父名＆LT; /名称＆gt;
    ＆LT;模块＆gt;
        ＆LT;＆模块GT;模块1 LT; /模块＆GT;
        ＆LT;＆模块GT;模块-2'; /模块＆GT;
    ＆LT; /模块＆gt;
＆LT; /项目＆GT;

解决方案

在一个较高的水平，构建顺序是基于拓扑排序模块依赖关系图的。

编辑：问题要问你。据我所知，项目1包含两个模块也是如此项目2。但在做项目2个明确的模块声明父POM作为父母？我在想，也许你​​的项目1模块显式声明父POM，以及项目2模块没有。这将意味着在项目2父是不是真的在所有父，因此不具有模块之前建造。这是我的猜测反正。

The situation is, I have two Maven multimodule projects with the same structure:

Parent
    - Module 1
    - Module 2

When I build project 1, I see that parent is built first (order is parent->module1->module2). However for project 2, parent is built at last (order is module1->module2->parent). Why are the two projects have different build orders? Furthermore, how can I manually control the build order?

Update 1:
Both parent projects are simple POM projects without source code, so I can't explain the build order as per the dependency graph.

Update 2:
The parent POMs are the same except the GAV and child module names:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>parent-group-id</groupId>
    <artifactId>parent-artifact-id</artifactId>
    <version>parent-version</version>
    <packaging>pom</packaging>
    <name>parent-name</name>
    <modules>
        <module>module-1</module>
        <module>module-2</module>
    </modules>
</project>

解决方案

At a high level, the build order is based on a topological sort of the module dependency graph.

EDIT: Question for you. I understand that project 1 contains two modules and so does project 2. But do the modules in project 2 explicitly declare the "parent" pom as a parent? I'm thinking that perhaps your project 1 modules explicitly declare the parent pom, and the project 2 modules don't. Which would mean that the project 2 "parent" isn't really a parent at all and therefore doesn't have to be built before the modules. That's my guess anyway.

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