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Rainbow JS CodeGeneration

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npm i rainbow-js-codegeneration --saveDev


The module exposes one method generate that accepts options object as a parameter

import { generator, IOptions } from 'rainbow-js-codegeneration';
const options: IOptions = {
  cwd: path,
const result = await generator(options);


This method search for files based on pattern provided, read them and construct templates objects. Once processing is done it complies Handlebars template and generates C# code.


  • cwd: string (required) - defines a root directory for a glob search;
  • pattern: string|string[] (required) - defines a pattern for the glob search;
  • templatePath: string (default: standard template for GlassMapper embedded) - path to a Handlebars template file that will process templates info.;
  • Using: string[] - a list of using that should be rendered in the header of the file;
  • ToClass: function(name:string) (default: PascalCase class name) - overrides a logic that generates class names;
  • ToInterface: function(name:string) (default: class name prepended with 'I')- overrides a logic that generates interface names;
  • ToNamespace: function(path:string) (default: section of a path excluding /sitecore/templates and template name) - overrides a logic that generates namespace names;
  • ToProperty: function(name:string) (default: PascalCase property name)- overrides a logic that generates property names from field names;
  • ToPropertyType: function(type:string, id:string) (default: simple mapping to available types in GlassMapper) - extends logic related to mapping of a fields to C# tpe of a property. If return undefined will fall back to default.


The method will compile provided or embedded template and pass two objects there templates and options

Sample of a template file:

#pragma warning disable 1591
#pragma warning disable 0108
// <auto-generated>
//     This code was generated by Rainbow JS CodeGeneration.
//     (
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using Glass.Mapper.Sc.Configuration.Attributes;
using Glass.Mapper.Sc.Configuration;
using Glass.Mapper.Sc.Fields;
using Sitecore.Globalization;
using Sitecore.Data;
using Sitecore.Data.Items;
{{#each options.Using}}using {{this}};\n{{/each}}
{{#each templates}}
namespace {{this.AsNamespace}}
  /// <summary>
  /// {{this.AsInterface}} Interface
  /// <para>Path: {{this.Path}}</para>
  /// <para>ID: {{this.ID}}</para>
  /// </summary>
  public partial interface {{this.AsInterface}}: {{#each this.BaseTemplates}}{{this.AsInterface}}, {{/each}}IGlassBase
    {{#each this.Fields}}
    /// <summary>
    /// The {{this.PropertyName}} field.
    /// <para>Field Type: {{this.Type}}</para>
    /// <para>Field ID: {{this.ID}}</para>
    /// </summary>
    {{{this.AsPropertyType}}} {{this.AsProperty}} {get; set;}

Template Helpers

guid-b: will convert text to UPPER CASE and wrap in { }. Could be used to emulate output of C# method .ToString("B")

{{guid-b this.ID}}
{{! will return "{00000000-ABCD-0000-0000-000000000000}"}}

guid-d: will convert text to UPPER CASE. Could be used to emulate output of C# method .ToString("D")

{{guid-b this.ID}}
{{! will return "00000000-ABCD-0000-0000-000000000000"}}

Gulp integration


The library provides a Gulp plugin. The plugin will generate code file for each configuration file detected. See example below:

// other imports
var codeGen = require('rainbow-js-codegeneration').generationPlugin;
// code generation task
gulp.task("Generate-Code", function (callback) {
  gulp.src('**/codegeneration.config.js', { base: "./" })
    .pipe(rename(function (path) {
      path.basename = "Templates.Generated";
      path.extname = ".cs"
    .on("end", function () { // will make sure that you wait for generation to finish


Configuration of the library could be provided via JS module. See example below:

var path = require("path");
module.exports = {
  cwd: path.join(__dirname, '..'),
  pattern: '**/serialization/*.Templates/**/*.yml',
  Using: [ 'System.CodeDom.Compiler' ],
  templatePath: path.join(__dirname, 'codegeneration.tmpl'),

Available scripts

  • clean - remove coverage data, Jest cache and transpiled files,
  • build - transpile TypeScript to ES6,
  • watch - interactive watch mode to automatically transpile source files,
  • lint - lint source files and tests,
  • test - run tests,
  • test:watch - interactive watch mode to automatically re-run tests


Licensed under the MIT. See the LICENSE file for details.


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