Gradle compileOnly和Maven提供 [英] Gradle compileOnly and Maven provided
本文介绍了Gradle compileOnly和Maven提供的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个带有改造依赖项的简单项目.
I have a simple project with the retrofit dependency.
dependencies {
...
implementation 'com.squareup.retrofit2:retrofit:2.8.1'
}
如果我检查了改进版pom.xml，则可以找到OkHttp依赖项作为compile maven范围，这也意味着旧的compile gradle配置.
If i check the retrofit pom.xml I can find the OkHttp dependency as a compile maven scope that means the old compile gradle configuration as well.
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>parent</artifactId>
<version>2.8.1</version>
<relativePath>../pom.xml</relativePath>
</parent>
<artifactId>retrofit</artifactId>
<name>Retrofit</name>
<dependencies>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
</dependency>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlinx</groupId>
<artifactId>kotlinx-coroutines-core</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.codehaus.mojo</groupId>
<artifactId>animal-sniffer-annotations</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>jsr305</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>mockwebserver</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.robolectric</groupId>
<artifactId>robolectric</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<phase>process-sources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifestEntries>
<Automatic-Module-Name>retrofit2</Automatic-Module-Name>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.4</version>
<configuration>
<excludePackageNames>retrofit2.internal</excludePackageNames>
</configuration>
</plugin>
</plugins>
</build>
</project>
这让我很困惑.检查okhttp pom.xml后，我不明白为什么在Project -> External Libraries中找不到jsr305之外的conscrypt，roboelectric和mojo.为什么?
And here comes the part that mess my mind. After check the okhttp pom.xml I don't understand why in Project -> External Libraries I can't find conscrypt, roboelectric, nor mojo except jsr305. Why?
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>parent</artifactId>
<version>3.14.7</version>
</parent>
<artifactId>okhttp</artifactId>
<name>OkHttp</name>
<dependencies>
<dependency>
<groupId>com.squareup.okio</groupId>
<artifactId>okio</artifactId>
</dependency>
<dependency>
<groupId>org.conscrypt</groupId>
<artifactId>conscrypt-openjdk-uber</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.robolectric</groupId>
<artifactId>android-all</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>jsr305</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.codehaus.mojo</groupId>
<artifactId>animal-sniffer-annotations</artifactId>
<version>1.17</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>templating-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<goals>
<goal>filter-sources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>3.0.1</version>
<configuration>
<excludePackageNames>okhttp3.internal:okhttp3.internal.*</excludePackageNames>
<links>
<link>http://square.github.io/okio/</link>
</links>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.1.1</version>
<configuration>
<archive>
<manifestEntries>
<Automatic-Module-Name>okhttp3</Automatic-Module-Name>
</manifestEntries>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
问题
如果maven provide像gradle compileOnly一样，为什么我无法访问conscrypt，roboelectric或mojo的代码?
Question
If maven provide is like gradle compileOnly why I can't access to the code of conscrypt, roboelectric, or mojo?
推荐答案
在Maven中，provided和test依赖项不是可继承的:
In Maven, provided and test dependencies are not transitively inherited:
如果您对A有依赖关系，而A对B有provided或test依赖关系，则B不在您的类路径中.
If you have a dependency on A, and A has a provided or test dependency on B, then B is not on your classpath.
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