Tycho build and sync with Maven Central

[rwl]

To allow the LLVM IR parser to be used in Maven/Gradle/Ivy projects we could move to using Tycho. The resulting artifacts could then be uploaded to Maven Central through Sonatype Nexus.

[rwl]

It is unfortunate that it is not currently possible to configure a "POM first" Tycho build. The dependencies (Xtext in particular) are not available from a Maven repository. Projects wishing to use the IR model are tied to P2 for automated dependency resolution. The *StandaloneSetup class generated by Xtext provides registration support in non-Equinox OSGI environments. Maven projects could use this to build and serialise IR models like so:

        LLVM_IRFactory factory = LLVM_IRFactoryImpl.eINSTANCE;

        Model model = factory.createModel();

        GlobalVariable global = factory.createGlobalVariable();
        global.setName("foo");
        Type type = factory.createType();
        NonLeftRecursiveType nonLeftRecursiveType = factory
                .createNonLeftRecursiveType();
        nonLeftRecursiveType.setType(factory.createOpaqueType());
        type.setBaseType(nonLeftRecursiveType);
        global.setType(type);
        model.getElements().add(global);

        FunctionDef funcDef = factory.createFunctionDef();

        FunctionHeader funcHeader = factory.createFunctionHeader();
        funcHeader.setName("@b1");
        Parameters params = factory.createParameters();
        Parameter param = factory.createParameter();
        param.setName("%argc");
        ParameterType paramType = factory.createParameterType();
        Type type4 = factory.createType();
        NonLeftRecursiveType nonLeftRecursiveType4 = factory
                .createNonLeftRecursiveType();
        nonLeftRecursiveType4.setType(factory.createIntType());
        type4.setBaseType(nonLeftRecursiveType4);
        paramType.setType(type4);
        param.setType(paramType);
        params.getParameters().add(param);
        //      params.setVararg("...");
        funcHeader.setParameters(params);
        ParameterType pt = factory.createParameterType();
        Type type3 = factory.createType();
        NonLeftRecursiveType nonLeftRecursiveType3 = factory
                .createNonLeftRecursiveType();
        nonLeftRecursiveType3.setType(factory.createVoidType());
        type3.setBaseType(nonLeftRecursiveType3);
        pt.setType(type3);
        funcHeader.setRettype(pt);
        funcDef.setHeader(funcHeader);

        BasicBlock bb = factory.createBasicBlock();
        bb.setName("%entrypoint");
        MiddleInstruction mi = factory.createMiddleInstruction();
        NamedMiddleInstruction nmi = factory.createNamedMiddleInstruction();
        nmi.setName("%a1");
        Instruction_alloca alloca = factory.createInstruction_alloca();
        Type type2 = factory.createType();
        NonLeftRecursiveType nonLeftRecursiveType2 = factory
                .createNonLeftRecursiveType();
        nonLeftRecursiveType2.setType(factory.createIntType());
        type2.setBaseType(nonLeftRecursiveType2);
        alloca.setType(type2);
        alloca.setOpcode("alloca");
        nmi.setInstruction(alloca);
        mi.setInstruction(nmi);
        bb.getInstructions().add(mi);
        TerminatorInstruction ti = factory.createTerminatorInstruction();
        Instruction_ret ret = factory.createInstruction_ret();
        ret.setOpcode("ret");
        ti.setInstruction(ret);
        bb.getInstructions().add(ti);
        funcDef.getBasicBlocks().add(bb);

        model.getElements().add(funcDef);

        Injector injector = new LLVM_IRStandaloneSetup()
                .createInjectorAndDoEMFRegistration();

        XtextResourceSet resourceSet = injector
                .getInstance(XtextResourceSet.class);
        XtextResource resource = (XtextResource) resourceSet.createResource(URI
                .createURI("platform:/resource/./dummy.ll"));
        resource.getContents().add(model);

        //System.out.println(EmfFormatter.listToStr(model.getElements()));

        SaveOptions options = SaveOptions.newBuilder().format().getOptions();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try {
            resource.save(outputStream, options.toOptionsMap());
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("Serialized result: " + outputStream.toString());