var engine = require('assemble-nunjucks');
var assemble = require('assemble');
app.use(engine());

app.page({path: 'foo.njk', contents: 'this is {{name}}'});

// render a view
app.render('foo.njk', {name: 'Foo'}, function(err, res) {
  console.log(res.contents.toString());
  //=> 'this is Foo'
});

app.src('*.njk')
  .pipe(app.renderFile())
  .on('data', function(file) {
    console.log(file.contents.toString());
    //=> 'this is Foo'
  });

app.option('engine', 'njk');

app.helper('foo', function(str) {
  // do stuff to str
  return str;
});
// or
app.addFilter('foo', function(str) {
  // do stuff to str
  return str;
});

app.helpers({
  foo: function() {},
  bar: function() {},
  baz: function() {}
});
// or
app.addFilters({
  foo: function() {},
  bar: function() {},
  baz: function() {}
});

app.asyncHelper('foo', function(str) {
  // do stuff to str
  return str;
});
// or
app.asyncAddFilter('foo', function(str) {
  // do stuff to str
  return str;
});

app.asyncHelpers({
  foo: function() {},
  bar: function() {},
  baz: function() {}
});
// or
app.asyncAddFilters({
  foo: function() {},
  bar: function() {},
  baz: function() {}
});

app.use(engine({nunjucks: require('nunjucks')}));

var nunjucks = require('nunjucks');
var env = new nunjucks.Environment();
app.use(engine({env: env}));