private List collectProjects()

in maven-core/src/main/java/org/apache/maven/DefaultMaven.java [473:575]
80 lines of code
17 McCabe index (conditional complexity)

    private List collectProjects( List files, MavenExecutionRequest request, boolean isRoot )
        throws ArtifactResolutionException, ProjectBuildingException, ProfileActivationException,
        MavenExecutionException, BuildFailureException
    {
//        .getLocalRepository(), request.isRecursive(),
//        request.getSettings(), request.getUserProperties(), requ, !request.isReactorActive()
        List projects = new ArrayList( files.size() );

        for ( Iterator iterator = files.iterator(); iterator.hasNext(); )
        {
            File file = (File) iterator.next();

            boolean usingReleasePom = false;

            if ( RELEASE_POMv4.equals( file.getName() ) )
            {
                getLogger().info( "NOTE: Using release-pom: " + file + " in reactor build." );
                usingReleasePom = true;
            }

            MavenProject project = getProject( file, request );

            if ( isRoot )
            {
                project.setExecutionRoot( true );
            }

            if ( ( project.getPrerequisites() != null ) && ( project.getPrerequisites().getMaven() != null ) )
            {
                DefaultArtifactVersion version = new DefaultArtifactVersion( project.getPrerequisites().getMaven() );
                if ( runtimeInformation.getApplicationVersion().compareTo( version ) < 0 )
                {
                    throw new BuildFailureException( "Unable to build project '" + project.getFile()
                        + "; it requires Maven version " + version.toString() );
                }
            }

            if ( ( project.getModules() != null ) && !project.getModules().isEmpty() && request.isRecursive() )
            {
                // TODO: Really should fail if it was not? What if it is aggregating - eg "ear"?
                project.setPackaging( "pom" );

                File basedir = file.getParentFile();

                // Initial ordering is as declared in the modules section
                List moduleFiles = new ArrayList( project.getModules().size() );
                for ( Iterator i = project.getModules().iterator(); i.hasNext(); )
                {
                    String name = (String) i.next();

                    if ( StringUtils.isEmpty( StringUtils.trim( name ) ) )
                    {
                        getLogger().warn(
                            "Empty module detected. Please check you don't have any empty module definitions in your POM." );

                        continue;
                    }

                    File moduleFile = new File( basedir, name );

                    if ( moduleFile.exists() && moduleFile.isDirectory() )
                    {
                        if ( usingReleasePom )
                        {
                            moduleFile = new File( basedir, name + "/" + Maven.RELEASE_POMv4 );
                        }
                        else
                        {
                            moduleFile = new File( basedir, name + "/" + Maven.POMv4 );
                        }
                    }

                    if ( Os.isFamily( "windows" ) )
                    {
                        // we don't canonicalize on unix to avoid interfering with symlinks

                        try
                        {
                            moduleFile = moduleFile.getCanonicalFile();
                        }
                        catch ( IOException e )
                        {
                            throw new MavenExecutionException( "Unable to canonicalize file name " + moduleFile, e );
                        }
                    }
                    else
                    {
                        moduleFile = new File( moduleFile.toURI().normalize() );
                    }

                    moduleFiles.add( moduleFile );
                }

                List collectedProjects =
                    collectProjects( moduleFiles, request, false );
                projects.addAll( collectedProjects );
                project.setCollectedProjects( collectedProjects );
            }
            projects.add( project );
        }

        return projects;
    }