我正在创建一些需要第三方插件和功能的Eclipse插件和功能。为了将这些依赖项包含到我的项目中，我创建了一个p2布局存储库。
注意：我的p2工件不是Maven项目......但是，我使用的是Maven风格的建筑。这是p2存储库的pom.xml
<properties>
<tycho-version>0.18.0</tycho-version>
</properties>
<repositories>
<repository>
<id>eclipse-platform-m6</id>
<layout>p2</layout>
<url>http://download.eclipse.org/eclipse/updates/3.8</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.tycho.extras</groupId>
<artifactId>tycho-p2-extras-plugin</artifactId>
<version>${tycho-version}</version>
<executions>
<execution>
<phase>prepare-package</phase>
<goals>
<goal>publish-features-and-bundles</goal>
</goals>
<configuration>
<compress>false</compress>
<artifactRepositoryLocation>/mypath/target/repository</artifactRepositoryLocation>
<metadataRepositoryLocation>/mypath/target/repository</metadataRepositoryLocation>
<sourceLocation>/mypath/src</sourceLocation>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-p2-repository-plugin</artifactId>
<version>${tycho-version}</version>
<configuration>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>verify-repository</goal>
<goal>archive-repository</goal>
</goals>
<configuration>
<compress>false</compress>
<includeAllDependencies>true</includeAllDependencies>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-p2-publisher-plugin</artifactId>
<version>${tycho-version}</version>
<configuration>
<publishArtifacts>true</publishArtifacts>
</configuration>
</plugin>
<plugin><!-- enable the Tycho build extension -->
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-maven-plugin</artifactId>
<version>${tycho-version}</version>
<extensions>true</extensions>
</plugin>
</plugins>
</build>
以上构建成功，并创建（并验证）p2存储库。我在项目的target/目录中获得了以下结构
- Project
..
..
- target
- p2agent
- org.eclipse.equinox.p2.core
- org.eclipse.equinox.p2.engine
- repository
- features
- plugins
artifacts.xml
content.xml
<projectname>-<version>.zip <!-- This contains same things as repository directory here -->
现在，我使用Tycho构建我的插件和功能，并参考我上面创建的p2存储库。我的插件和功能有以下项目结构
- bundle.parent
- bundle.mainplugin
- bundle.mainplugin.test.fragment
- bundle.mainplugin.feature
这是我的bundle.parent pom.xml
<repositories>
<repository>
<id>eclipse-platform-m6</id>
<layout>p2</layout>
<url>http://download.eclipse.org/eclipse/updates/3.8</url>
</repository>
<repository>
<id>third-party-eclipse-plugins</id>
<layout>p2</layout>
<url>file:///.../target/repository</url>
</repository>
</repositories>
<modules>
<module>../bundle.mainplugin</module>
<module>../bundle.mainplugin.test.fragment</module>
<module>../bundle.mainplugin.feature</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-maven-plugin</artifactId>
<version>${tycho-version}</version>
<extensions>true</extensions>
</plugin>
</plugins>
</build>
最后，我在父pom.xml上运行目标mvn clean install。不幸的是，当插件中的类扩展插件中的某些类时，mvn-compile会引发编译问题。 （这些类在运行时也是必需的）。这是错误：
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:0.18.0:compile (default-compile
) on project <Project Name>: Compilation failure
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: copied.org.apache.maven.plugin.CompilationFailureException: Compilation failure
at copied.org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:442)
at org.eclipse.tycho.compiler.AbstractOsgiCompilerMojo.execute(AbstractOsgiCompilerMojo.java:239)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
我的问题：
从编译器错误中，我相信Tycho不知道这些第三方工件是否可用于我的类，因为编译器有错误。有没有办法确定我的插件类是否存在于Tycho类路径中？
更新
检查了我希望在Tycho反应堆中可用的第三方捆绑包的可用性java -jar /home/.../eclipse-3.8.2/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar -debug -consolelog -application org.eclipse.equinox.p2.director -repository file:///home/../target/repository -list
所有第三方捆绑包都成功显示。
答案 0 :(得分：3)
Sebastian Zarnekow的回答给了我一个暗示。
Error while building an xtext project with ant: Generation of the Grammar classes fails
正如您可以从错误消息中推断的那样，maven无法通过注入创建语言模型。原因在上面的链接中解释：
Xtext使用EMF的平台：/ resource URI方案。
解决方案是您需要为EMFGenerator提供模型目录所在位置的新声明。在** .mwe2文件中，替换以下代码
fragment = ecore.EMFGeneratorFragment auto-inject {}
与
fragment = ecore.EMFGeneratorFragment auto-inject {
javaModelDirectory = "/${projectName}/src-gen"
}
应该这样做。
答案 1 :(得分：1)
对于遇到此问题的任何人，您也可以尝试使用：
${project.basedir}
所以，假设您有以下目录：
- projects:
- main-project
- local-repository
在父pom（即：main-project / pom.xml）中，使用相对路径引用local-repository，方法如下：
<url>file:${project.basedir}/target/repository</url>
答案 2 :(得分：0)
只需替换：
<url>file:///.../target/repository</url>
by：
<url>file:<projectname>/deploy/target/repository</url>
（如果您的父pom.xml是您的根文件夹）