docs: function initViewEngines() {
    var relativePathToViews = path.relative(build.baseDir, build.sourceDir);
    verbose('relativePathToViews: ' + relativePathToViews);
    
    app.set('views', relativePathToViews);
    app.locals = build.context;
  
    var eng = build.engine.jade;
    if (eng && eng.extension)
      vrend['.' + eng.extension] = renderJade;
    eng = build.engine.nunjucks;
    if (eng && eng.extension)
      vrend['.' + eng.extension] = renderNunjucks;
  }