maven - 使用gradle从nexus服务器复制最新的jar文件

Question

我正在尝试使用 Gradle 从我的 Nexus 服务器复制最新的 jar 文件( com.bar.baz:mapping:0.0.1-SNAPSHOT )。

使用以下 build.gradle 下载特定版本:

apply plugin: "java"

repositories {
    maven {
        credentials  {
            username = "${mavenUser}"
            password = "${mavenPassword}"
        }
        url "https://nexus.cluster.foo.cloud/repository/maven-snapshots"
        authentication {
            basic(BasicAuthentication)
        }
    }
}

configurations {
    copyConf
}

dependencies {
    copyConf group: "com.bar.baz", name: "mapping", version: "0.0.1-20190508.085532-7"
}

task copyTask(type: Copy) {
    from configurations.copyConf
    into "."
}

但是我想下载最新的 0.0.1-SNAPSHOT版本，不是特定的 0.0.1-20190508.085532-7版本。那可能吗？如何？

使用版本 "latest.integration"而不是 "0.0.1-20190508.085532-7" (并调用 gradle copyTask --refresh-dependencies --stacktrace )产生:

FAILURE: Build failed with an exception.

* What went wrong: Could not resolve all files for configuration ':copyConf'.
> Could not find any matches for com.bar.baz:mapping:latest.integration as no versions
of com.bar.baz:mapping are available.   Searched in
the following locations:
      https://nexus.cluster.foo.cloud/repository/maven-snapshots/com/ba/baz/mapping/maven-metadata.xml
      https://nexus.cluster.foo.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/maven-metadata.xml
      https://nexus.cluster.foo.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190508.085534-8.pom
      https://nexus.cluster.foo.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190508.085534-8.jar
Required by:
      project :

* Try: Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException:
Could not resolve all files for configuration ':copyConf'.
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:918)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$1600(DefaultConfiguration.java:116)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:892)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:404)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown
Source)
        at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:206)
        at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:116)
…

更新:

使用版本 "0.0.1-SNAPSHOT"而不是 "0.0.1-20190508.085532-7" (并调用 gradle copyTask --refresh-dependencies --stacktrace )产生几乎相同的错误，唯一的区别是:

第 2 行改为:

找不到 com.bar.baz:mapping:0.0.1-SNAPSHOT。

位置没有搜索https://nexus.cluster.foo.cloud/repository/maven-snapshots/com/ba/baz/mapping/maven-metadata.xml

使用版本 "0.0.1"而不是 "0.0.1-20190508.085532-7" (并调用 gradle copyTask --refresh-dependencies --stacktrace )产生:

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all files for configuration ':copyConf'.
> Could not resolve com.bar.baz:mapping:0.0.1.
  Required by:
      project :
   > Could not resolve com.bar.baz:mapping:0.0.1.
      > Could not get resource 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'.
         > Could not GET 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'. Received status code 400 from server: Bad Request

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':copyConf'.
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:918)
...

另一个更新:

使用 maven 从 nexus 服务器复制最新的 jar 文件确实有效，使用以下 pom.xml:

<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>com.bar.baz</groupId>
  <artifactId>TAndMapping</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>${project.artifactId}</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <mapping>mapping</mapping>
  </properties>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>3.1.1</version>
        <executions>
          <execution>
            <id>copy</id>
            <phase>package</phase>
            <goals>
              <goal>copy</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <artifactItems> 
            <artifactItem>
              <groupId>com.bar.baz</groupId>
              <artifactId>${mapping}</artifactId>
              <version>0.0.1-SNAPSHOT</version>
              <type>jar</type>
              <overWrite>true</overWrite>
              <destFileName>${mapping}.jar</destFileName>   
            </artifactItem>
          </artifactItems>
          <overWriteSnapshots>true</overWriteSnapshots>
        </configuration>
      </plugin> 
    </plugins>
  </build>
  <repositories>
    <repository>
      <id>nexus-snapshots</id>
      <name>Snapshot</name>
      <url>https://nexus.cluster.regulator.cloud/repository/maven-snapshots/</url>
    </repository>
  </repositories>
</project>

另一个更新:切换到 Gradle 5.4.1，我得到了一些不同的堆栈跟踪:

对于版本 latest.integration :

• Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':copyTask'. at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:38) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:73) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406) at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158) at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49) at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':copyConf'. at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:1195) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$2100(DefaultConfiguration.java:138) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:1170) at org.gradle.api.internal.file.AbstractFileCollection.iterator(AbstractFileCollection.java:72) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.iterator(DefaultConfiguration.java:467) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:209) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:114) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:85) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:195) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:109) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:85) at org.gradle.api.internal.file.CompositeFileCollection$1.visitContents(CompositeFileCollection.java:130) at org.gradle.api.internal.file.CompositeFileTree$FilteredFileTree.visitContents(CompositeFileTree.java:120) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveNested(DefaultFileCollectionResolveContext.java:144) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:112) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileCollections(DefaultFileCollectionResolveContext.java:92) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileCollectionConverter.convertInto(DefaultFileCollectionResolveContext.java:164) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:109) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileCollections(DefaultFileCollectionResolveContext.java:92) at org.gradle.api.internal.file.CompositeFileCollection.getSourceCollections(CompositeFileCollection.java:192) at org.gradle.api.internal.file.CompositeFileCollection.isEmpty(CompositeFileCollection.java:98) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:67) at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67) at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46) at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94) at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46) at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56) at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36) ... 24 more Caused by: org.gradle.internal.resolve.ModuleVersionNotFoundException: Could not find any matches for com.bar.baz:mapping:latest.integration as no versions of com.bar.baz:mapping are available. Searched in the following locations:
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/maven-metadata.xml
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/maven-metadata.xml
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190510.001602-2.pom
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190510.001602-2.jar Required by: project :

对于版本 0.0.1-SNAPSHOT :

• Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':copyTask'. at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:38) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:73) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416) at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406) at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158) at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49) at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193) at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':copyConf'. at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:1195) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$2100(DefaultConfiguration.java:138) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:1170) at org.gradle.api.internal.file.AbstractFileCollection.iterator(AbstractFileCollection.java:72) at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.iterator(DefaultConfiguration.java:467) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:209) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:114) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:85) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:195) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:109) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:85) at org.gradle.api.internal.file.CompositeFileCollection$1.visitContents(CompositeFileCollection.java:130) at org.gradle.api.internal.file.CompositeFileTree$FilteredFileTree.visitContents(CompositeFileTree.java:120) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveNested(DefaultFileCollectionResolveContext.java:144) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:112) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileCollections(DefaultFileCollectionResolveContext.java:92) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileCollectionConverter.convertInto(DefaultFileCollectionResolveContext.java:164) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:109) at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileCollections(DefaultFileCollectionResolveContext.java:92) at org.gradle.api.internal.file.CompositeFileCollection.getSourceCollections(CompositeFileCollection.java:192) at org.gradle.api.internal.file.CompositeFileCollection.isEmpty(CompositeFileCollection.java:98) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:67) at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67) at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46) at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94) at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46) at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56) at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36) ... 24 more Caused by: org.gradle.internal.resolve.ModuleVersionNotFoundException: Could not find com.bar.baz:mapping:0.0.1-SNAPSHOT. Searched in the following locations:
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/maven-metadata.xml
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190510.001602-2.pom
  • https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190510.001602-2.jar Required by: project :

对于版本 0.0.1 :

• Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':copyTask'. at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:38) ..... org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36) ... 24 more Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.bar.baz:mapping:0.0.1. Required by: project : Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.bar.baz:mapping:0.0.1. Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'. at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:74)
  .... org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: org.gradle.internal.resource.transport.http.HttpErrorStatusCodeException: Could not GET 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'. Received status code 400 from server: Bad Request at org.gradle.internal.resource.transport.http.HttpClientHelper.processResponse(HttpClientHelper.java:160) at ... org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':copyConf'. ... org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36) ... 24 more Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.bar.baz:mapping:0.0.1. Required by: project : Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.bar.baz:mapping:0.0.1. Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'. at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:74) ... at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.copyToCache(DefaultCacheAwareExternalResourceAccessor.java:199) ... 110 more

另一个更新:由于@Louis Jacomet 的回答，我更详细地查看了我们的 Nexus 服务器，目前， .../com/bar/baz/mapping/0.0.1-SNAPSHOT/maven-metadata.xml列出:

<metadata modelVersion="1.1.0">
<groupId>com.bar.baz</groupId>
<artifactId>mapping</artifactId>
<version>0.0.1-SNAPSHOT</version>
<versioning>
  <snapshot>
    <timestamp>20190516.163117</timestamp>
    <buildNumber>2</buildNumber>
  </snapshot>
  <lastUpdated>20190516163117</lastUpdated>
  <snapshotVersions>  
    <snapshotVersion>
      <extension>jar</extension>
      <value>0.0.1-20190516.163116-1</value>
      <updated>20190516163117</updated>
    </snapshotVersion>
    <snapshotVersion>
      <extension>pom</extension>
      <value>0.0.1-20190516.163116-1</value>
      <updated>20190516163117</updated>
    </snapshotVersion>
  </snapshotVersions>
</versioning>
</metadata>

因此，gradle 在 https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1-SNAPSHOT/mapping-0.0.1-20190516.163117-2.jar 中搜索.它找不到它，因为 Nexus 服务器上唯一可用的版本是版本 0.0.1-20190516.163116-1 .我不明白为什么会这样，我猜这是一个 Nexus 错误，而不是 Gradle 错误。但是，通过 Maven 复制(请参阅 pom.xml 的第二次更新)仍会找到 Nexus 上可用的 0.0.1-SNAPSHOT 版本并下载它。

Answer 1

看起来你正在得到

org.gradle.internal.resource.transport.http.HttpErrorStatusCodeException: Could not GET 'https://nexus.cluster.regulator.cloud/repository/maven-snapshots/com/bar/baz/mapping/0.0.1/mapping-0.0.1.pom'. Received status code 400 from server: Bad Request

鉴于此，最可能的解释是存储库的配置是错误的。检查为 Maven 设置的身份验证类型，或检查您的内部组织在接受与 Nexus 实例的连接之前是否进行了其他检查。

编辑问题后编辑

很明显， maven-metadata.xml 之间存在不匹配。 Nexus 中的文件以及 Gradle 解析的内容。

可以看出 in code :

if ("metadata/versioning/snapshot/timestamp".equals(getContext())) {
    mavenMetadata.timestamp = getText();
}
if ("metadata/versioning/snapshot/buildNumber".equals(getContext())) {
    mavenMetadata.buildNumber = getText();
}
if ("metadata/versioning/versions/version".equals(getContext())) {
    mavenMetadata.versions.add(getText().trim());
}

Gradle 只看 snapshot节点而不是 snapshotVersions那些。

那里有两个选择:

发布另一个快照，看看是否能解决 maven-metadata.xml不一致。

向 Gradle 提出问题，要求改进对这些极端情况的支持