Cannot handle Maven transitive system-scoped optional dependencies

[carlspring]

Expected Behavior

I need to use compile group: 'org.apache.yetus', name: 'audience-annotations', version: '0.10.0' in a Gradle project. However, as can be seen here, it has a system-scoped optional dependency defined like this:

  <dependencies>
    <dependency>
      <!-- Version and location set in project pom -->
      <groupId>jdk.tools</groupId>
      <artifactId>jdk.tools</artifactId>
      <scope>system</scope>
      <!-- Mark as optional so that it isn't taken transitively -->
      <optional>true</optional>
    </dependency>
  </dependencies>

The Problem: Because this is: a) a system-scoped and b) optional dependency, Gradle should not be trying to resolve it.

I have the following defined in my build.gradle file:

allprojects {

    configurations.all {
        exclude group: 'jdk.tools', module 'jdk.tools'
    }
    
}

I was expecting this would take care of erasing the dependency from the dependency tree/graph.

However, it's still complaining with:

carlspring@carlspring:/java/opensource/gradle/possible-gradle-bug> gradle --no-daemon clean build

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all files for configuration ':compileClasspath'.
> Could not resolve org.apache.yetus:audience-annotations:0.10.0.
  Required by:
      project :
   > Could not resolve org.apache.yetus:audience-annotations:0.10.0.
      > Could not parse POM https://repo1.maven.org/maven2/org/apache/yetus/audience-annotations/0.10.0/audience-annotations-0.10.0.pom
         > Unable to resolve version for dependency 'jdk.tools:jdk.tools:jar'

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

* Get more help at https://help.gradle.org

BUILD FAILED in 4s
2 actionable tasks: 1 executed, 1 up-to-date

I don't think it should be attempting to resolve the dependency's pom, or validate it's coordinates in any way, as it's being told to exclude this dependency.

What more do I need to do in order to really exclude this dependency, which shouldn't actually be required, as I'm building the code using a JDK (1.8.0_144)?

I'm using Gradle 4.2.1, (not sure, if upgrading will be an option, unless it's a 4.x version).

I have a "Hello, World!" application illustrating this here.

Current Behavior

The system-scoped optional Maven dependency is not being excluded, like it's being told to.

Steps to Reproduce

Checkout this Hello, World! project and run:

gradle --no-daemon clean build

Your Environment

------------------------------------------------------------
Gradle 4.2.1
------------------------------------------------------------

Build time:   2017-10-02 15:36:21 UTC
Revision:     a88ebd6be7840c2e59ae4782eb0f27fbe3405ddf

Groovy:       2.4.12
Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM:          1.8.0_101 (Oracle Corporation 25.101-b13)
OS:           Linux 4.14.6-1-default amd64

See Also

• Originally asked on Stackoverflow here, but I suspect this is an actual bug.
  The same thing occurs on Windows 10 as well with Gradle 4.2.1.
• Raised a follow-up bug with Apache Yetus under YETUS-897.

[dsaikia]

Looks like this got fixed with Gradle 4.10.2 OR somewhere in between these two releases. I have tried running the Hello World , and that works fine with 4.10.2.

Environment:

Gradle 4.10.2

Build time: 2018-09-19 18:10:15 UTC
Revision: b4d8d5d

Kotlin DSL: 1.0-rc-6
Kotlin: 1.2.61
Groovy: 2.4.15
Ant: Apache Ant(TM) version 1.9.11 compiled on March 23 2018
JVM: 1.8.0_202
OS: Mac OS X 10.14.4 x86_64

[carlspring]

Thanks for checking this! It really does work in 4.10.2, unlike 4.2.1.

Please, feel free to close this!

[ljacomet]

Closing as requested