使用目标平台处理用Tycho构建的Eclipse插件的依赖关系

Question

I'm developing an Eclipse plugin with Tycho, and I want to handle my dependencies using a target platform, following the steps described in this tutorial . But when I try to compile my plugin project (using clean install) I get the following error:

[ERROR] Cannot resolve project dependencies:
[ERROR]   Software being installed: com.codeandme.tycho.plugin 1.0.0.qualifier
[ERROR]   Missing requirement: com.codeandme.tycho.plugin 1.0.0.qualifier requires 'bundle org.eclipse.ui 0.0.0' but it could not be found

Here is the pom.xml of my plugin project:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <artifactId>com.codeandme.tycho.plugin</artifactId>
    <packaging>eclipse-plugin</packaging>

    <parent>
        <groupId>tycho_example</groupId>
        <artifactId>com.codeandme.tycho.releng</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../com.codeandme.tycho.releng</relativePath>
    </parent>
</project>

and here is the pom.xml of the parent project (releng):

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>tycho_example</groupId>
    <artifactId>com.codeandme.tycho.releng</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <tycho.version>0.22.0</tycho.version>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>



    <build>
        <plugins>
            <plugin>
                <!-- enable tycho build extension -->
                <groupId>org.eclipse.tycho</groupId>
                <artifactId>tycho-maven-plugin</artifactId>
                <version>${tycho.version}</version>
                <extensions>true</extensions>
            </plugin>

            <plugin>
                <groupId>org.eclipse.tycho</groupId>
                <artifactId>target-platform-configuration</artifactId>
                <version>${tycho.version}</version>
                <configuration>
                    <resolver>p2</resolver>
                    <pomDependencies>consider</pomDependencies>
                    <target>
                        <artifact>
                            <groupId>tycho_example</groupId>
                            <artifactId>com.codeandme.tycho.releng.targetplatform</artifactId>
                        </artifact>
                    </target>
                    <environments>
                        <environment>
                            <os>win32</os>
                            <ws>win32</ws>
                            <arch>x86</arch>
                        </environment>
                    </environments>
                </configuration>
            </plugin>

        </plugins>
    </build>
    <modules>
        <module>../com.codeandme.tycho.plugin</module>

        <module>../com.codeandme.tycho.releng.targetplatform</module>
    </modules>
</project>  

and here is the pom.xml of my target platform:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <artifactId>com.codeandme.tycho.releng.targetplatform</artifactId>
  <packaging>eclipse-target-definition</packaging>
  <parent>
    <groupId>tycho_example</groupId>
    <artifactId>com.codeandme.tycho.releng</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <relativePath>../com.codeandme.tycho.releng</relativePath>
  </parent>
  <groupId>tycho_example</groupId>
</project>

and finally the .tpd of the target platform:

target "Tycho Tutorial"

with source requirements

location "http://download.eclipse.org/tools/orbit/downloads/drops/R20150519210750/repository/" mars-orbit {
    org.apache.commons.lang3
}

location "http://download.eclipse.org/releases/mars" mars-release {
    org.eclipse.platform.feature.group
    org.eclipse.equinox.executable.feature.group
    org.eclipse.e4.rcp.feature.group
    org.eclipse.ui.trace
    org.eclipse.pde.feature.group
}

Any kind of help would be appreciated.

Answer 1

In your target definition you included org.eclipse.e4.rcp.feature.group , while the original tutorial requested you to include org.eclipse.rcp.feature.group . That's why the UI bundle is missing.

You can easily check the actual content of the target platform: right click the .tpd file, choose "generate target definition", open the newly generated .target file, wait for Eclipse to resolve it (watch the progress view), and after it has been resolved, the "contents" page of the target editor shows the plugins available in that target platform.