' - >' （箭头）表示在gradle的依赖图中？ [英] What does '->' (arrow) mean in gradle's dependency graph?

问题描述

我试图运行一些Android测试，但编译器抱怨存在多个dex文件。

I'm trying to run some Android tests, however, the compiler complains that multiple dex files exist.

Multiple dex files define Lorg/hamcrest/MatcherAssert;

所以我试图过滤重复的依赖项： $ ./gradlew - q依赖应用程序：依赖关系 - 配置androidTestCompile

So I'm trying to filter duplicated dependencies: $ ./gradlew -q dependencies app:dependencies --configuration androidTestCompile

但是，我得到以下输出：

However I get the following output:

------------------------------------------------------------
Project :app
------------------------------------------------------------

androidTestCompile - Classpath for compiling the androidTest sources.
+--- org.mockito:mockito-core:1.9.5
|    +--- org.hamcrest:hamcrest-core:1.1 -> 1.3
|    \--- org.objenesis:objenesis:1.0 -> 2.1
+--- com.google.dexmaker:dexmaker-mockito:1.2
|    +--- com.google.dexmaker:dexmaker:1.2
|    \--- org.mockito:mockito-core:1.9.5 (*)
+--- com.android.support.test.espresso:espresso-core:2.0
|    +--- com.squareup:javawriter:2.1.1
|    +--- org.hamcrest:hamcrest-integration:1.1
|    |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3
|    +--- org.hamcrest:hamcrest-library:1.1
|    |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3
|    +--- javax.inject:javax.inject:1
|    +--- com.android.support.test.espresso:espresso-idling-resource:2.0
|    +--- com.android.support.test:testing-support-lib:0.1
|    |    \--- junit:junit-dep:4.10
|    |         \--- org.hamcrest:hamcrest-core:1.1 -> 1.3
|    +--- com.google.code.findbugs:jsr305:2.0.1
|    +--- javax.annotation:javax.annotation-api:1.2
|    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3
+--- com.android.support.test:testing-support-lib:0.1 (*)
+--- org.powermock:powermock-module-junit4:1.5.6
|    +--- junit:junit:4.11
|    |    \--- org.hamcrest:hamcrest-core:1.3
|    \--- org.powermock:powermock-module-junit4-common:1.5.6
|         +--- junit:junit:4.4 -> 4.11 (*)
|         +--- org.powermock:powermock-core:1.5.6
|         |    +--- org.powermock:powermock-reflect:1.5.6
|         |    |    \--- org.objenesis:objenesis:2.1
|         |    \--- org.javassist:javassist:3.18.2-GA
|         \--- org.powermock:powermock-reflect:1.5.6 (*)
\--- org.powermock:powermock-api-mockito:1.5.6
     \--- org.powermock:powermock-api-support:1.5.6
          +--- org.powermock:powermock-core:1.5.6 (*)
          \--- org.powermock:powermock-reflect:1.5.6 (*)

(*) - dependencies omitted (listed previously)

我对箭头（ - >）的含义感到困惑。这是什么意思？

I'm confused as what the arrows (->) mean. What do they mean?

推荐答案

这意味着依赖关系图包含多个依赖关系，具有相同的 code>和模块，但不同的版本例如 org.hamcrest：hamcrest芯。 Gradle尝试自动解决冲突的版本 - 默认选择最新版本。在的左侧，> 是请求的版本，右侧将选择该版本。 这里可以找到类似的问题。

It means that dependency graph contains multiple dependencies with the same group and module but different versions for e.g. org.hamcrest:hamcrest-core. Gradle tries to resolve conflicted versions automatically - by default the latest version is chosen. On the left side of -> is the requested version, on the right the version that will be picked. Here similar question can be found.

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