【发布时间】：2018-03-22 10:08:52
【问题描述】：
我有一个项目依赖于 POM 打包项目
<dependency>
<groupId>my.external</groupId>
<artifactId>all-ext-libs</artifactId>
<type>POM</type>
<version>2.0-SNAPSHOT</version>
</dependency>
上述依赖有如下POM：
<?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>
<parent>
<groupId>my.external</groupId>
<artifactId>mvn-root</artifactId>
<version>1.2</version>
</parent>
<groupId>my.external</groupId>
<artifactId>all-ext-libs</artifactId>
<version>2.0-SNAPSHOT</version>
<packaging>pom</packaging>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.10.19</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}-${project.version}-r${build.number}</finalName>
<directory>${project.basedir}/target</directory>
<sourceDirectory>src/main/java</sourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>src/test/resources</directory>
</testResource>
</testResources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>default-testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
<configuration>
<skip>${skipTestCompile}</skip>
</configuration>
</execution>
</executions>
<configuration>
<source>1.8</source>
<target>1.8</target>
<verbose>false</verbose>
<useIncrementalCompilation>false</useIncrementalCompilation>
<executable>${env.JAVA_HOME}/bin/javac</executable>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skipTests>${skipTestCompile}</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-install-plugin</artifactId>
<configuration>
<file>${project.build.finalName}</file>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
<configuration>
<tagNameFormat>v@{project.version}</tagNameFormat>
</configuration>
</plugin>
</plugins>
</build>
</project>
当我在my.external 项目上执行mvn clean install -U 时，它只下载JUnit 依赖项，而不下载mockito。我已经确认我的.m2 repo 中不存在 mockito。
依赖树什么时候弹出，但是当我从 .m2 缓存中删除它并执行 mvn clean install -U 时，它没有被下载：
[INFO] | | \- org.ow2.asm:asm-tree:jar:5.0.2:provided
[INFO] | | \- org.ow2.asm:asm:jar:5.0.2:provided
[INFO] | +- org.apache.maven.reporting:maven-reporting-impl:jar:2.1:provided
[INFO] | +- org.apache.maven.reporting:maven-reporting-api:jar:3.0:provided
[INFO] | +- org.apache.maven:maven-plugin-descriptor:jar:2.2.1:provided
[INFO] | +- org.apache.maven:maven-artifact:jar:2.2.1:compile
[INFO] | +- org.apache.maven.doxia:doxia-core:jar:1.4:provided
[INFO] | | +- org.apache.maven.doxia:doxia-logging-api:jar:1.4:provided
[INFO] | | \- org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile
[INFO] | +- org.apache.maven.doxia:doxia-sink-api:jar:1.4:provided
[INFO] | +- org.apache.maven.doxia:doxia-decoration-model:jar:1.4:provided
[INFO] | +- org.apache.maven.doxia:doxia-site-renderer:jar:1.4:provided
[INFO] | | +- org.apache.maven.doxia:doxia-module-xhtml:jar:1.4:provided
[INFO] | | +- org.apache.maven.doxia:doxia-module-fml:jar:1.4:provided
[INFO] | | +- org.codehaus.plexus:plexus-i18n:jar:1.0-beta-7:provided
[INFO] | | +- org.codehaus.plexus:plexus-velocity:jar:1.1.7:provided
[INFO] | | \- org.apache.velocity:velocity-tools:jar:2.0:provided
[INFO] | | +- sslext:sslext:jar:1.2-0:provided
[INFO] | | \- org.apache.struts:struts-tiles:jar:1.3.8:provided
[INFO] | +- org.apache.maven.shared:maven-doxia-tools:jar:1.2.1:provided
[INFO] | | \- org.apache.maven:maven-artifact-manager:jar:2.0.6:compile
[INFO] | | +- org.apache.maven:maven-repository-metadata:jar:2.0.6:compile
[INFO] | | \- org.apache.maven.wagon:wagon-provider-api:jar:1.0-beta-2:compile
[INFO] | +- org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9:compile
[INFO] | | \- classworlds:classworlds:jar:1.1-alpha-2:compile
[INFO] | \- org.sonatype.plexus:plexus-build-api:jar:0.0.7:provided
[INFO] +- junit:junit:jar:3.8.1:test
[INFO] +- org.mockito:mockito-all:jar:1.10.19:test
我用maven有一段时间了，如果我的理解是正确的，它只是一个下载和管理依赖的工具。但是如果我要求它下载一些东西，它会下载/管理它，以便我的目标应用程序可以看到依赖项。
那么为什么添加到my.external项目中时拒绝下载呢？因为 JUnit 下载良好并且具有相同的包装 (POM)。
【问题讨论】：
-
请分享您的 pom 类型的 my.external 项目的完整 pom 文件...