javamavenosgitychoosgi-fragment

Tycho cannot resolve fragment dependency on other fragment


I want to create an extension for org.eclipse.swt as a fragment. I have created a bundle swt.extension with the following MANIFEST.MF:

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Extension
Bundle-SymbolicName: swt.extension
Bundle-Version: 1.0.0.qualifier
Fragment-Host: org.eclipse.swt;bundle-version="3.102.0"
Bundle-RequiredExecutionEnvironment: JavaSE-1.7

Also, I have created an interface which extends an interface from SWT:

public interface IExtendedStyleTextContent extends org.eclipse.swt.custom.StyledTextContent {
}

When I build my project with tycho (mvn clean install) the following error occurs:

1. ERROR in C:\<path>\tycho-fragment-to-fragment-dependency\swt.extension\src\org\example\tycho_example\IExtendedStyleTextContent.java (at line 3)

public interface IExtendedStyleTextContent extends org.eclipse.swt.custom.StyledTextContent {

                                                   ^^^^^^^^^^^

org.eclipse cannot be resolved to a type

It seems that tycho resolves only org.eclipse.swt jar. This is a host bundle and it contains no classes. The actual implementation is in org.eclipse.swt.win32.win32.x86_64 fragment bundle. And it looks like this bundle is not on classpath when tycho-compiler-plugin compiles the project.

Is this a bug of Tycho? Are their any workarounds?

I have put all sources on GitHub: https://github.com/orionll/tycho-fragment-to-fragment-dependency

I use maven 3.1.0


Solution

  • So, a workaround for this issue was found in mailing lists: http://dev.eclipse.org/mhonarc/lists/tycho-user/msg03277.html

    To solve the issue one should add the following sections to POM and build.properties:

    <build>
      <plugins>
        <plugin>
          <groupId>org.eclipse.tycho</groupId>
          <artifactId>target-platform-configuration</artifactId>
          <version>${tycho-version}</version>
          <configuration>
            <dependency-resolution>
              <extraRequirements>
                <requirement>
                  <type>eclipse-plugin</type>
                  <id>org.eclipse.swt.win32.win32.x86_64</id>
                  <versionRange>[3.0.0,4.0.0)</versionRange>
                </requirement>
              </extraRequirements>
            </dependency-resolution>
          </configuration>
        </plugin>
      </plugins>
    </build>
    

    build.properties:

    extra.. = platform:/fragment/org.eclipse.swt.win32.win32.x86_64
    

    I have also updated the GitHub repository