Tycho下载依赖但未能解决它

Question

我对Tycho 0.15.0有一个奇怪的问题.我有8个依赖项,MANIFEST.MF但Tycho无法解决其中一个问题.输出如下所示:

[INFO] 1 operation remaining.
[INFO] Fetching org.eclipse.xtext.logging_1.2.15.v201206120633.jar (4kB of 10.12kB at 0B/s) from http://my.server.com/p2-3.7.2/plugins/
[INFO] Resolving class path of MavenProject: <...my project ...> @ <...path to my project...>/pom.xml
[ERROR] Internal error: java.lang.RuntimeException: org.osgi.framework.BundleException: Bundle <...my project...> cannot be resolved
[ERROR] Resolution errors:
[ERROR] Bundle <...my project...> - Missing Constraint: Require-Bundle: org.eclipse.xtext.logging; bundle-version="1.2.15"
[ERROR] -> [Help 1]
org.apache.maven.InternalErrorException: Internal error: java.lang.RuntimeException: org.osgi.framework.BundleException: Bundle <...my project...> cannot be resolved
Resolution errors:
Bundle <...my project...> - Missing Constraint: Require-Bundle: org.eclipse.xtext.logging; bundle-version="1.2.15"

我知道的:

1. 罐子org.eclipse.xtext.logging_1.2.15.v201206120633.jar存在
2. 罐子没有腐败
3. Tycho可以从我的p2服务器下载它(~/.m2/repository/p2/osgi/bundle/org.eclipse.xtext.logging/1.2.15.v201206120633/org.eclipse.xtext.logging-1.2.15.v201206120633.jar我的电脑上有)

4. 在MANIFEST.MF看起来是正确的:

   Manifest-Version: 1.0
   Ant-Version: Apache Ant 1.8.2
   Bundle-Vendor: %providerName
   Bundle-Localization: fragment
   Fragment-Host: org.apache.log4j;bundle-version="[1.2.15,1.2.16)"
   Bundle-RequiredExecutionEnvironment: J2SE-1.5
   Bundle-Name: %pluginName
   Bundle-SymbolicName: org.eclipse.xtext.logging;singleton:=true
   Created-By: 1.5.0_22-b03 (Sun Microsystems Inc.)
   Bundle-Version: 1.2.15.v201206120633
   Bundle-ManifestVersion: 2
   Import-Package: org.eclipse.core.runtime,org.osgi.framework;version="1
   .5.0"
   

5. Tycho 0.16.0也有同样的问题.

有任何想法吗？

Answer 1

您看到此行为的原因如下:

• org.eclipse.xtext.logging为片段,而不是一个独立的束(你可以看到,因为它具有Fragment-Host在MANIFEST.MF其中限定了另一束到这个人是的片段).
• 片段在p2中编码的方式,a Require-Bundle到片段可以在p2中解析.基于p2的依赖关系解析确定将目标平台的哪些工件下载到本地Maven存储库.
• A Require-Bundle到片段将无法在OSGi服务器中解析.为了计算类路径(因此控制台输出Resolving class path),Tycho使用Equinox解析器.该解析器正确检测到片段的Require-Bundle无效.