node-codegen

A template based, language agnostic, node scriptable code generator for developers .

Installation

To install the the ravi-codegen run the following cmd from terminal

npm i -g ravi-codegen

Initialize code generator

Run cmd from terminal

codegen init

It will create a folder .codegen where all your templates reside

Templates

Every folder in .codegen directory considered as a template. Every template consist of at least two files

1. Template script (template.js)
2. Template (template.ejs)

Template script

Template script file is the entry point of your template script. Every template script must expose a default function that returns one or more Template models.

Every template model can have following fields.

1. fileName - Template output file name, default: <template-name>
2. directory - Output directory relative path from current directory, default: ., eg. ../entities
3. overideFile - Should override existing file if true, default: false
4. model - any data which is required by the template, default: null
5. templateFile - template to be used for this template model, default: template.ejs

So, a very simple script will look like as following

module.exports = async function script (args) { // args, provided while running the script
    let templateModels = []; // for every model in templateModels codegen execute and generate some file defined by the model rules.

    // create template model
    const templateModel = {
        fileName: '', // Template output file name, default: <template-name>
        directory: '.', // Output directory relative path from current directory, default: ., eg. ../entities
        templateFile: '', // Template name to use, default: template.ejs
        model: {
            // add model properties here, any property added will be available in ejs template used.
            msg: 'lets start generating your code',
        }, 
        overideFile: false, // Should override if file exists, default false
    };
    templateModels.push(templateModel);
    return templateModels;
}

Script Examples

Template file

ravi-codegen uses the EJS template to generate the files. Take a look at EJS understand text templating language.

Create new template via cli

Run cmd from terminal

codegen new <template-name>

The above command will create a folder in .codegen directory with two files, namely template.js and template.ejs

Run the codegen template

Run cmd from terminal

codegen run <template-name> [args]

The above command will execute and create code files according to your templates.