Using Xtend in a feature based plugin - xtend

Question

I am trying to learn Xtend and Eclipse plugin development at the same time. I created an Eclipse plugin project and added three Xtend classes to implement Parts in the application model. If I leave the project as a plugin based project and I try to launch it from the product configuration, everything works fine.
However, if I convert it to a feature based project and try to launch it from the product configuration, I get an error trying to resolve com.google.guava.
Here is the error log:
!SESSION 2018-07-27 06:36:27.121 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.8.0_181
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product com.example.e4.rcp.todo.product -clearPersistedState
Command-line arguments: -product com.example.e4.rcp.todo.product -data D:\WiseOldBird\Workspaces\VogellaRcpXtend/runtime-todo.product -dev file:D:/WiseOldBird/Workspaces/VogellaRcpXtend/.metadata/.plugins/org.eclipse.pde.core/todo.product/dev.properties -os win32 -ws win32 -arch x86_64 -consoleLog -clearPersistedState
!ENTRY org.eclipse.equinox.app 0 0 2018-07-27 06:36:28.434
!MESSAGE Product com.example.e4.rcp.todo.product could not be found.
!ENTRY com.example.e4.rcp.todo 2 0 2018-07-27 06:36:28.526
!MESSAGE Could not resolve module: com.example.e4.rcp.todo [75]
Unresolved requirement: Require-Bundle: com.google.guava
!ENTRY org.eclipse.osgi 4 0 2018-07-27 06:36:28.531
!MESSAGE Application error
!STACK 1
java.lang.RuntimeException: No application id has been found.
at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(EclipseAppContainer.java:242)
at org.eclipse.equinox.internal.app.MainApplicationLauncher.run(MainApplicationLauncher.java:29)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:656)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:592)
at org.eclipse.equinox.launcher.Main.run(Main.java:1498)
at org.eclipse.equinox.launcher.Main.main(Main.java:1471)
An error has occurred. See the log file
D:\WiseOldBird\Workspaces\VogellaRcpXtend\.metadata\.plugins\org.eclipse.pde.core\todo.product\1532691387713.log.
Here is the MANIFEST.MF file:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Todo
Bundle-SymbolicName: com.example.e4.rcp.todo;singleton:=true
Bundle-Version: 1.0.0.qualifier
Automatic-Module-Name: com.example.e4.rcp.todo
Bundle-RequiredExecutionEnvironment: JavaSE-1.8
Require-Bundle: com.google.guava,
org.eclipse.xtext.xbase.lib,
org.eclipse.xtend.lib,
org.eclipse.xtend.lib.macro
and here is the feature.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<feature
id="com.example.e4.rcp.todo.feature"
label="Feature"
version="1.0.0.qualifier">
<description url="http://www.example.com/description">
[Enter Feature Description here.]
</description>
<copyright url="http://www.example.com/copyright">
[Enter Copyright Description here.]
</copyright>
<license url="http://www.example.com/license">
[Enter License Description here.]
</license>
<requires>
<import plugin="com.google.guava"/>
<import plugin="org.eclipse.xtext.xbase.lib"/>
</requires>
<plugin
id="com.example.e4.rcp.todo"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
</feature>
I have been unable to figure out how to specify the additional Xtend dependencies in a feature project and need advice.

Answer 1

As the error message says, your product doesn't contain the Guava plugin.
As you want your product to be feature-based you have to add a feature that contains the Guava plugin. If necessary, you can define your own feature for that.