[INFO] --- maven-dependency-plugin:3.0.2:resolve (default-cli) @ maven-javadoc-plugin --- [INFO] Can't extract module name from groovy-2.4.13.jar: Provider class groovy not in module

Maybe this helps....

You can confirm this with JShell:

String artifact = "" // path to artifact
System.out.println(java.lang.module.ModuleFinder.of(java.nio.file.Paths.get(artifact)).findAll().stream().findFirst().get().descriptor().name())

You don't see the complete stacktrace here, which means you can't see the root cause :(
maven-dependency-plugin does show the root cause

thanks,
Robert

On Sun, 03 Dec 2017 13:40:51 +0100, Ceki Gulcu <[email protected]> wrote:


Hello all,

The logback project, more specifically logback-classic, offers the possibility of configuration via a script written in Groovy. Thus, logback-classic has source files written in Java and a few source files in Groovy.

While attempting to (Jigsaw) modularize the logback project, I first tried to declare "requires static groovy" in logback-classic's module-info.java file but the compiler was unable to load groovy-2.4.13.jar as an auto-module.

To get the ball rolling, I had to resort to the "--add-reads ch.qos.logback.classic=ALL-UNNAMED" compiler directive. This is very unsatisfactory.

On twitter, Cédric Champeau‏ suggested manually editing MANIFEST.MF in groovy-2.4.13.jar adding "Automatic-Module-Name: groovylang". I edited the file and also declared "requires static groovylang" in logback-classic's module-info.java. However, this did not help and I still get "module not found: groovylang"

Building with maven's -X option, I see that groovy-2.4.13.jar ends up on the compiler's class path instead of the module path.

Still on twitter, Robert Scolte responded that m-compiler-p only puts the jars on the module path if they are referred to by a requires statement anywhere in the module descriptors tree. The rest ends up on the classpath.

I am assuming here that "module descriptors tree" refers to module-info.java files and not dependency declarations in pom.xml files. Thus, if I understand correctly m-compiler-p parses module-info.java files before invoking javac. Really?

Best regards,

--
Ceki Gülcü


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