Gradle: samples do not run if OpenJFX is not installed on the system

[xzel23]

The samples use the gradle application plugin, and so it should be possible to run by typing ./gradlew run in the directory containing the project (i.e. hellofx). While compilation succeeds, running fails. The build.gradle should be changed to add Openjfx dependencies to the run configuration.

Example output:

axel@xiaolong hellofx % ./gradlew build

BUILD SUCCESSFUL in 1s
5 actionable tasks: 5 executed
axel@xiaolong hellofx % ./gradlew run  

> Task :run FAILED
Loading library prism_es2 from resource failed: java.lang.UnsatisfiedLinkError: /Users/axel/.openjfx/cache/13/libprism_es2.dylib: dlopen(/Users/axel/.openjfx/cache/13/libprism_es2.dylib, 1): no suitable image found.  Did find:
        /Users/axel/.openjfx/cache/13/libprism_es2.dylib: code signature in (/Users/axel/.openjfx/cache/13/libprism_es2.dylib) not valid for use in process using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.
java.lang.UnsatisfiedLinkError: /Users/axel/.openjfx/cache/13/libprism_es2.dylib: dlopen(/Users/axel/.openjfx/cache/13/libprism_es2.dylib, 1): no suitable image found.  Did find:
        /Users/axel/.openjfx/cache/13/libprism_es2.dylib: code signature in (/Users/axel/.openjfx/cache/13/libprism_es2.dylib) not valid for use in process using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.
        at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
        at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2430)
        at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2487)
        at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2684)
        at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2617)
        at java.base/java.lang.Runtime.load0(Runtime.java:765)
        at java.base/java.lang.System.load(System.java:1866)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.installLibraryFromResource(NativeLibLoader.java:214)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibraryFromResource(NativeLibLoader.java:194)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:135)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:53)
        at javafx.graphics/com.sun.prism.es2.ES2Pipeline.lambda$static$0(ES2Pipeline.java:68)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:310)
        at javafx.graphics/com.sun.prism.es2.ES2Pipeline.<clinit>(ES2Pipeline.java:50)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:332)
        at javafx.graphics/com.sun.prism.GraphicsPipeline.createPipeline(GraphicsPipeline.java:218)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:91)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:835)
Loading library prism_sw from resource failed: java.lang.UnsatisfiedLinkError: /Users/axel/.openjfx/cache/13/libprism_sw.dylib: dlopen(/Users/axel/.openjfx/cache/13/libprism_sw.dylib, 1): no suitable image found.  Did find:
        /Users/axel/.openjfx/cache/13/libprism_sw.dylib: code signature in (/Users/axel/.openjfx/cache/13/libprism_sw.dylib) not valid for use in process using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.
java.lang.UnsatisfiedLinkError: /Users/axel/.openjfx/cache/13/libprism_sw.dylib: dlopen(/Users/axel/.openjfx/cache/13/libprism_sw.dylib, 1): no suitable image found.  Did find:
        /Users/axel/.openjfx/cache/13/libprism_sw.dylib: code signature in (/Users/axel/.openjfx/cache/13/libprism_sw.dylib) not valid for use in process using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.
        at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
        at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2430)
        at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2487)
        at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2684)
        at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2617)
        at java.base/java.lang.Runtime.load0(Runtime.java:765)
        at java.base/java.lang.System.load(System.java:1866)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.installLibraryFromResource(NativeLibLoader.java:214)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibraryFromResource(NativeLibLoader.java:194)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:135)
        at javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:53)
        at javafx.graphics/com.sun.prism.sw.SWPipeline.lambda$static$0(SWPipeline.java:42)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:310)
        at javafx.graphics/com.sun.prism.sw.SWPipeline.<clinit>(SWPipeline.java:41)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:332)
        at javafx.graphics/com.sun.prism.GraphicsPipeline.createPipeline(GraphicsPipeline.java:218)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:91)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:835)
Graphics Device initialization failed for :  es2, sw
Error initializing QuantumRenderer: no suitable pipeline found
java.lang.RuntimeException: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:280)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:244)
        at javafx.graphics/com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:260)
        at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:267)
        at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:409)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:94)
        at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:835)
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: No toolkit found
        at javafx.graphics/com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:272)
        at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:267)
        at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:409)
        at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
        ... 5 more

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/Library/Java/JavaVirtualMachines/adoptopenjdk-12.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1

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

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

BUILD FAILED in 0s
3 actionable tasks: 2 executed, 1 up-to-date