Use Groovy app and test code in combination with jlink solution for bundling JavaFX

问题

This follows on from this excellent solution to the question of how to get Gradle to bundle up JavaFX with your distributions.

NB specs: Linux Mint 18.3, Java 11, JavaFX 13.

That stuff, involving jlink and a module-info.java, is beyond my pay grade (although I'm trying to read up on these things).

I want to move to using Groovy in my app and test code (i.e. Spock) rather than Java. The trouble is, the minute I include the "normal" dependency in my build.gradle i.e.

implementation 'org.codehaus.groovy:groovy-all:2.5.9'

and try to build, I get multiple errors:

mike@M17A ~/IdeaProjects/TestProj $  ./gradlew build

> Configure project :
Found module name 'javafx.jlink.example.main'

> Task :compileTestJava FAILED
error: the unnamed module reads package org.codehaus.groovy.tools.shell.util from both org.codehaus.groovy.groovysh and org.codehaus.groovy
[...]
error: the unnamed module reads package groovy.xml from both org.codehaus.groovy and org.codehaus.groovy.xml
[...]
error: module org.codehaus.groovy.ant reads package groovy.lang from both org.codehaus.groovy and org.codehaus.groovy.test
error: module org.codehaus.groovy.ant reads package groovy.util from both org.codehaus.groovy.xml and org.codehaus.groovy.ant
100 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileTestJava'.

Yes, 100 errors... probably more! By commenting out various things I think I've come to the conclusion that some Groovy dependency is being injected by the jlink stuff. Fine, I can live with that (although it'd be nice to know what version of Groovy it is).

The trouble is, even if I omit the Groovy dependency line, the same errors occur when I try to introduce the Spock dependency:

testImplementation 'org.spockframework:spock-core:1.2-groovy-2.5'

Has anyone got any idea what's going on here and what to do about it?

回答1:

I searched for an answer. I didn't find a good solution.

According to this, it seems that Groovy is currently not really compatible with Java modules. It is due to the fact that some packages are contained by multiple jars of the library (not compatible with modules). You will have to wait for Groovy 4 for a compatible version.

I discovered that the JavaFX plugin use this plugin internally. This plugin seems to consider that all dependencies are modules (it is not the default Gradle behaviour).

To make your application works, it seems that you have to:

force Gradle to put Groovy in the classpath instead of the modulepath (it will not be considerered as a module, but seems impossible if you use the javafx plugin)
use the "patch-module" system: it allows Gradle to make a fusion of the library jars into a single module, to prevent the problem of packages that are in different jars

I searched the Groovy jars with IDEA (Project structure/Libraries), and I tried to use the syntax offered by the plugin to use "patch-module":

patchModules.config = [
    "org.codehaus.groovy=groovy-ant-3.0.1.jar",
    "org.codehaus.groovy=groovy-cli-picocli-3.0.1.jar",
    "org.codehaus.groovy=groovy-console-3.0.1.jar",
    "org.codehaus.groovy=groovy-datetime-3.0.1.jar",
    "org.codehaus.groovy=groovy-docgenerator-3.0.1.jar",
    "org.codehaus.groovy=groovy-groovydoc-3.0.1.jar",
    "org.codehaus.groovy=groovy-groovysh-3.0.1.jar",
    "org.codehaus.groovy=groovy-jmx-3.0.1.jar",
    "org.codehaus.groovy=groovy-json-3.0.1.jar",
    "org.codehaus.groovy=groovy-jsr-3.0.1.jar",
    "org.codehaus.groovy=groovy-macro-3.0.1.jar",
    "org.codehaus.groovy=groovy-nio-3.0.1.jar",
    "org.codehaus.groovy=groovy-servlet-3.0.1.jar",
    "org.codehaus.groovy=groovy-sql-3.0.1.jar",
    "org.codehaus.groovy=groovy-swing-3.0.1.jar",
    "org.codehaus.groovy=groovy-templates-3.0.1.jar",
    "org.codehaus.groovy=groovy-test-junit-3.0.1.jar",
    "org.codehaus.groovy=groovy-test-3.0.1.jar",
    "org.codehaus.groovy=groovy-testng-3.0.1.jar",
    "org.codehaus.groovy=groovy-xml-3.0.1.jar"
]

It only works with a single line "org.codehaus.groovy=X.jar", but a bug prevents it to work with all of the library jars (Look at this issue on Github).

So you have multiple choices:

Use Java instead of Groovy
Wait for a new Groovy release, or new releases of plugins (modules-plugin, and a version of javafx-plugin that use this one internally)
Use old javafx configuration: dependencies are not module by default, and you have to specify manually in build.gradle that JavaFX dependencies should be considered as a module (check my "obsolete" answer to this question)

来源：https://stackoverflow.com/questions/60569904/use-groovy-app-and-test-code-in-combination-with-jlink-solution-for-bundling-jav

标签

gradle

javafx

groovy

module

jlink