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SandroGrzicic / ScalaBuff

the scala protocol buffers (protobuf) compiler
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Non programmatic use, `Failed to load Main-Class` #66

Open oschrenk opened 11 years ago

oschrenk commented 11 years ago

Is it possible the produce scala files in a non programmatic way. I tried the jar 

wget -O scalabuff-compiler_2.10-1.3.3.jar http://search.maven.org/remotecontent?filepath=net/sandrogrzicic/scalabuff-compiler_2.10/1.3.3/scalabuff-compiler_2.10-1.3.3.jar
    java -jar scalabuff-compiler_2.10-1.3.3.jar

but get

Failed to load Main-Class manifest attribute from
    scalabuff-compiler_2.10-1.3.3.jar

And indeed there is no such definition. Is there a way to do this?

oschrenk commented 11 years ago

The MANIFEST.MF in the jar from Maven Central

Manifest-Version: 1.0
Bnd-LastModified: 1374176813268
Bundle-ManifestVersion: 2
Bundle-Name: net.sandrogrzicic.scalabuff.compiler
Bundle-SymbolicName: net.sandrogrzicic.scalabuff.compiler
Bundle-Version: 1.3.3
Created-By: 1.7.0_25 (Oracle Corporation)
Import-Package: scala;version="[2.10,3)",scala.collection;version="[2.10
 ,3)",scala.collection.generic;version="[2.10,3)",scala.collection.immut
 able;version="[2.10,3)",scala.collection.mutable;version="[2.10,3)",sca
 la.collection.parallel;version="[2.10,3)",scala.reflect;version="[2.10,
 3)",scala.runtime;version="[2.10,3)",scala.util;version="[2.10,3)",scal
 a.util.matching;version="[2.10,3)",scala.util.parsing.combinator;versio
 n="[2.10,3)",scala.util.parsing.input;version="[2.10,3)"
Include-Resource: E:\_\Scala\ScalaBuff\scalabuff-compiler\src\main\resou
 rces,E:\_\Scala\ScalaBuff\scalabuff-compiler\target\scala-2.10\resource
 _managed\main
Private-Package: net.sandrogrzicic.scalabuff.compiler
Tool: Bnd-1.50.0

is very much different, from the one you get when executing sbt package

Manifest-Version: 1.0
Implementation-Vendor: net.sandrogrzicic
Implementation-Title: scalabuff-compiler
Implementation-Version: 1.3.3
Implementation-Vendor-Id: net.sandrogrzicic
Specification-Vendor: net.sandrogrzicic
Specification-Title: scalabuff-compiler
Specification-Version: 1.3.3
Main-Class: net.sandrogrzicic.scalabuff.compiler.ScalaBuff

Latter also doesn't work. java -jar scalabuff-compiler/target/scala-2.10/scalabuff-compiler_2.10-1.3.3.jar produces

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function1
    at net.sandrogrzicic.scalabuff.compiler.ScalaBuff.main(ScalaBuff.scala)
Caused by: java.lang.ClassNotFoundException: scala.Function1
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    ... 1 more
oschrenk commented 11 years ago

So I found the sbt way of compiling the .proto files. I documented my findings in the wiki on the usage examples page. Honestly I would like to have this information in the README.

Still it would be nice to having a working solution that works with a single jar.

SandroGrzicic commented 11 years ago

You need to start ScalaBuff with the scala command or at least include the necessary Scala libaries.

As for the missing main-class, it might be due to the SBT-OSGi plugin that I'm using.

oschrenk commented 11 years ago

I was under the assumption that it produced a Java executable jar. Understandably it doesn't. So this is the way:

$ sbt package
$ scala scalabuff-compiler/target/scala-2.10/scalabuff-compiler_2.10-1.3.3.jar

There is still the issue that the published jar, doesn't contain the definition of the Main-Class