java - 为什么 Gradle 试图为我的项目查找资源包？

Question

我正在尝试找出多项目构建的问题。我已将问题简化为非常简单的设置。

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等级信息

------------------------------------------------------------
Gradle 3.2.1
------------------------------------------------------------

Build time:   2016-11-22 15:19:54 UTC
Revision:     83b485b914fd4f335ad0e66af9d14aad458d2cc5

Groovy:       2.4.7
Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM:          1.7.0_40 (Oracle Corporation 24.0-b56)
OS:           Linux 2.6.32-642.11.1.el6.i686 i386

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目录结构

• 根/
  • Hello World /
    • src/
      • com.dishbreak.teSTLab
        • HelloWorld.java
  • 设置.gradle
  • 构建.gradle

注意，我没有使用 Maven SDL，因为我尝试做的遗留项目没有使用。

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HelloWorld.java

package com.dishbreak.testlab;

public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello world!");

    }

}

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设置.gradle

include ":HelloWorld"

构建.gradle

subprojects {
    apply plugin: "java"
    sourceSets {
        main {
            java {
                srcDirs = ['src/']
            }
        }
    }
    compileJava {
        options.verbose = true
    }
}

<小时/>

命令输出

[admin@box Plugins]$ gradle build
:HelloWorld:compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':HelloWorld:compileJava'.
> Cannot find javac resource bundle for locale en_US

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 0.87 secs

郑重声明，尝试使用 --info 标志会得到以下相关输出吗？

20:26:07.077 [INFO] [org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter] Executing task ':HelloWorld:compileJava' (up-to-date check took 0.002 secs) due to:
  No history is available.
20:26:07.077 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter] Executing actions for task ':HelloWorld:compileJava'.
20:26:07.077 [INFO] [org.gradle.api.internal.changedetection.changes.RebuildIncrementalTaskInputs] All input files are considered out-of-date for incremental task ':HelloWorld:compileJava'.
20:26:07.077 [DEBUG] [org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler] Compiler arguments: -source 1.7 -target 1.7 -d /redacted/root/HelloWorld/build/classes/main -verbose -g /redacted/root/HelloWorld/src/com/dishbreak/testlab/HelloWorld.java -XDuseUnsharedTable=true
20:26:07.078 [INFO] [org.gradle.api.internal.tasks.compile.JdkJavaCompiler] Compiling with JDK Java compiler API.
20:26:07.078 [DEBUG] [org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter] Removed task artifact state for {} from context.
20:26:07.078 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':HelloWorld:compileJava'
20:26:07.079 [LIFECYCLE] [class org.gradle.internal.buildevents.TaskExecutionLogger] :HelloWorld:compileJava FAILED

出于好奇，我尝试直接运行 javac 命令，它确实生成了一个可以运行的类文件!

[admin@box HelloWorld]$ javac -source 1.7 -target 1.7 -d /redacted/root/HelloWorld/build/classes/main -verbose -g /redacted/root/HelloWorld/src/com/dishbreak/testlab/HelloWorld.java -XDuseUnsharedTable=true
[parsing started RegularFileObject[/redacted/root/HelloWorld/src/com/dishbreak/testlab/HelloWorld.java]]
[parsing completed 14ms]
[search path for source files: .]
[search path for class files: /opt/java/jdk1.7.0_40/jre/lib/resources.jar,/opt/java/jdk1.7.0_40/jre/lib/rt.jar,/opt/java/jdk1.7.0_40/jre/lib/sunrsasign.jar,/opt/java/jdk1.7.0_40/jre/lib/jsse.jar,/opt/java/jdk1.7.0_40/jre/lib/jce.jar,/opt/java/jdk1.7.0_40/jre/lib/charsets.jar,/opt/java/jdk1.7.0_40/jre/lib/jfr.jar,/opt/java/jdk1.7.0_40/jre/classes,/opt/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar,/opt/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar,/opt/java/jdk1.7.0_40/jre/lib/ext/localedata.jar,/opt/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar,/opt/java/jdk1.7.0_40/jre/lib/ext/sunec.jar,/opt/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar,.]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/lang/Object.class)]]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/lang/String.class)]]
[checking com.dishbreak.testlab.HelloWorld]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/lang/AutoCloseable.class)]]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/lang/System.class)]]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/io/PrintStream.class)]]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/io/FilterOutputStream.class)]]
[loading ZipFileIndexFileObject[/opt/java/jdk1.7.0_40/lib/ct.sym(META-INF/sym/rt.jar/java/io/OutputStream.class)]]
[wrote RegularFileObject[/redacted/root/HelloWorld/build/classes/main/com/dishbreak/testlab/HelloWorld.class]]

当我尝试运行自动编译的类文件时？

[admin@box root]$ java -cp HelloWorld/build/classes/main/ com.dishbreak.testlab.HelloWorld
Hello world!

<小时/>

几个问题...

• 为什么编译任务的详细输出在 Gradle 中没有给我任何信息？
• 为什么 Gradle 要求提供资源包，而我的代码没有使用资源包？
• 为什么当我直接输入javac命令时它会起作用？
• 由于我没有使用 Maven SDL，还需要做什么吗？

Answer 1

您可以将其作为同级添加到 java 脚本 block

resources {
    filter {
        return it.exists()
    }
}