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[tycho-user] Failing to build a master archive for an Eclipse plugin 
Hi,
I would like to build a very simple Eclipse Plugin which I want to build using maven and tycho. First, I must admit that do not understand much about both maven and tycho, which seems to have an extreme learning curve at the first glance, and I was not really able to find a tutorial that is targeted at newbies. I found some tutorials covering how to build RCP applications but nothing when I just want to create a simple plugin for Eclipse. 

Basically, when doing a
  mvn package
in a dirctory called
  justify.repo
I get following error message

[INFO] Cannot complete the request.  Generating details.
[INFO] Cannot complete the request.  Generating details.
[INFO] {org.osgi.framework.executionenvironment=OSGi/Minimum-1.0,OSGi/Minimum-1.1, osgi.ws=gtk, osgi.arch=x86, osgi.os=linux, org.eclipse.update.install.features=true, org.osgi.framework.system.packages=}
[ERROR] Cannot resolve project dependencies:
[ERROR]   Software being installed: justify.repo raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT
[ERROR]   Missing requirement: justify.repo raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT requires 'justify.feature.feature.group [0.0.0,0.0.1)' but it could not be found
[ERROR]
[ERROR] Internal error: java.lang.RuntimeException: "No solution found because the problem is unsatisfiable.": ["Unable to satisfy dependency from justify.repo raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT to justify.feature.feature.group [0.0.0,0.0.1).", "No solution found because the problem is unsatisfiable."] -> [Help 1]
org.apache.maven.InternalErrorException: Internal error: java.lang.RuntimeException: "No solution found because the problem is unsatisfiable.": ["Unable to satisfy dependency from justify.repo raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT to justify.feature.feature.group [0.0.0,0.0.1).", "No solution found because the problem is unsatisfiable."]
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:168)
        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: java.lang.RuntimeException: "No solution found because the problem is unsatisfiable.": ["Unable to satisfy dependency from justify.repo raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT to justify.feature.feature.group [0.0.0,0.0.1).", "No solution found because the problem is unsatisfiable."]
        at org.eclipse.tycho.p2.impl.resolver.ProjectorResolutionStrategy.resolve(ProjectorResolutionStrategy.java:106)
        at org.eclipse.tycho.p2.impl.resolver.P2ResolverImpl.resolveProject(P2ResolverImpl.java:102)
        at org.eclipse.tycho.p2.impl.resolver.P2ResolverImpl.resolveProject(P2ResolverImpl.java:69)
        at org.eclipse.tycho.p2.resolver.P2TargetPlatformResolver.doResolvePlatform(P2TargetPlatformResolver.java:342)
        at org.eclipse.tycho.p2.resolver.P2TargetPlatformResolver.resolvePlatform(P2TargetPlatformResolver.java:162)
        at org.eclipse.tycho.core.resolver.DefaultTychoDependencyResolver.resolveProject(DefaultTychoDependencyResolver.java:85)
        at org.eclipse.tycho.core.maven.TychoMavenLifecycleParticipant.afterProjectsRead(TychoMavenLifecycleParticipant.java:91)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:273)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        ... 11 more
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/InternalErrorException


For reference, I attached all poms to this mail in the following order
  justify/pom.xml
  justify.feature/pom.xml
  justify.parent/pom.xml
  justify.repo/pom.xml

Doing an
  mvn package
both in justify and justify.feature doesn't produce any error message, from what I conclude that everything is fine.
It may be only a naming issue, but unfortunatelly, I cannot decode the error message at all, e.g., what does 
  raw:0.0.1.'SNAPSHOT'/format(n[.n=0;[.n=0;[-S]]]):0.0.1-SNAPSHOT
in the error message above really mean? I've never seen something like that before... 

It is perhaps possible to list all dependencies that are known?
Note that I'm not subscribed to this list, therefore please CC me. Thanks in advance! 

Bye
Sebastian


<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>
   <parent>
		<groupId>justify</groupId>
		<artifactId>justify.parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../justify.parent/pom.xml</relativePath>
	</parent>  
	
  <groupId>justify</groupId>
  <artifactId>justify</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>eclipse-plugin</packaging>
  
  <name>Justify</name>
</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>
   <parent>
		<groupId>justify</groupId>
		<artifactId>justify.parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../justify.parent/pom.xml</relativePath>
	</parent>  
  
  <groupId>justify</groupId>
  <artifactId>justify.feature</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>eclipse-feature</packaging>

</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>
  <groupId>justify</groupId>
  <artifactId>justify.parent</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  
  
  <properties>
     <tycho-version>0.13.0</tycho-version>
  </properties>

  <repositories>
   <repository>
      <id>eclipse-indigo</id>
      <layout>p2</layout>
      <url>http://download.eclipse.org/releases/indigo</url>
    </repository>
  </repositories>

   <build>
      <plugins>
         <plugin>
            <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>
			</configuration>
			
		</plugin>
      </plugins>
   </build>
  
   <modules>
    <module>../justify</module>
    <module>../justify.feature</module>
    <module>../justify.repo</module>
   </modules>
</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>
  <parent>
    <groupId>justify</groupId>
    <artifactId>justify.parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <relativePath>../justify.parent/pom.xml</relativePath>
  </parent>
  <groupId>justify</groupId>
  <artifactId>justify.repo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>eclipse-repository</packaging>
</project>
<?xml version="1.0" encoding="UTF-8"?>
<site>
   <feature url="features/justify.feature_0.0.0.qualifier.jar" id="justify.feature" version="0.0.0.qualifier"/>
</site>

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