@gen-codes/cli
This package is the console interface of gen.codes metaprogramming framework.
Last updated 4 months ago by gen-codes .
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@gen-codes/cli

This package is the console interface of gen.codes metaprogramming framework.

Features

  • Use publicly available code generators
  • Create code generators

Install

$ npm i -g @gen-codes/cli

Run

Generate a module's file

$ gen run -t @gen-codes/react/componentDoc.js

Choose the location where the generated file will be saved. Then fill in the form with the required data.

Generate based on a module schema model

$ gen run -m @gen-codes/react/component

This will bring a dialog to choose the location where associated files will be saved. After that input the required data.

Generate using a project filetree.

# from local filetree
$ gen run -f ./gen.filetree.json
# or from a published project module
$ gen run -f @gen-codes/mern-app

Embed it on a project

Navigate to your project root folder you want to bootstrap with gen.codes and run:

$ gen init . 

This will open a form that will guide you through the configuration.

The folders .gen/templates, .gen/templates/.partials and .gen/schema will be created. The schema folder contains the data structure, restrictions and automations. The templates folder contains files with template code dependent on schema models and custom inputs.

Install generators

You can install generators from repo.gen.codes

# locally if initialized
$ gen install @gen-codes/react @digigov/material-ui 
# globally
$ gen install -g @gen-codes/react @digigov/material-ui 

You can also search and install

$ gen search

This will bring up the search and install interface

Generating

Generate based on a known <generator_name>

gen run <generator_name>

if the generator doesn't exist locally it will try to fetch it from gen-codes store.

To choose from installed generators run:

gen run

Creating generators

Module dependencies

gen install <module_name>

Javascript dependencies

gen npm install <dependency_name>

File Templates

Any file you create in the templates folder is a file template. You can specify information and the required arguments in the head of the file using this syntax:

--(
name: element
description: Create a react component with material-ui
attributes:
- ref: Element
)--

Partial Templates

Create a folder template/.partials and add the code you want to reuse. You can call a partial from a file template using this syntax:

{> partial-name arg1=data1 arg2=data2}

Extension Templates

You must specify a hook in the original template file using this syntax:

{>= extend-config}

and then on the plugin or connector create the folder template/.extensions. In this folder create a file with name extend-config and add the code which extends the original template file.

Filetree Templates

example

export default {
  _variables: {
    mainClientFile: "client/main.js",
    mainServerFile: "server/server.js",
    webpackServerConfig: "webpack.config.server.js",
    webpackClientConfig: "webpack.config.client.js"
  },
  "{{app.name}}":{

    server: {
      models: {
        "{{model.name in app.models[]}}.model.js": {
          _template: "mongooseSchema"
        }
      },
      helpers: {
        "{{helper.name in app.helpers}}.js":{
          _template: "javascript/function"
        }
      },
      routes: {
        "{{model.name in app.models[]}}.routes.js": {
          _template: "routes",
          _context: {
            routes: "model.routes",
            prefix: "model.name"
          }
        }
      },
      "devBundle.js": {
        _template: "devBundle",
        _context: {
          webpackClientConfig: "var(webpackClientConfig)"
        }
      },
      "server.js": {
        _template: "server.js"
      }

    },
    ".babelrc": {
      _template: "babelrc",
    },
    "nodemon.json": {
      _template: "nodemon",
      _context: {
        webpackServerConfig: "var(webpackServerConfig)"
      }
    },
    "var(webpackClientConfig)": {
      _template: "config.client",
      _context: {
        mainFile: "var(mainClientFile)"
      }
    },
    "webpack.config.client.production.js": {
      _template: "config.client.production",
      _context: {
        mainFile: "var(mainClientFile)"
      }
    },
    "var(webpackServerConfig)": {
      _template: "config.server",
      _context: {
        mainFile: "var(mainServerFile)"
      }
    }
  }
}

Template helpers

Create a template helper function in the helpers folder. You can't export default. Only named exports is allowed.

export function helperName(arg1,arg2){
  // do something with args
  return something
}

Custom Syntax

You can add a custom template syntax by specifying a regex transformation. Create a .transformations.js file and export an array with objects like this:

{
  regex: /{{for (.*?) in (.*?)}}/g,
  expression: `{{#each $2 "$2.$1" as |$1|}}`,
  closingRegex: /{{\/for}}/g,
  closingExpression: `{{/each}}`
}

The expression must be a handlebars expression.

Extending and combining generators

To combine a generator create a connector.

Data rules

Hooks

You can run custom transformations after the code has been generated. For example you mhy want to run a linter or a beautifier. Create the folder hooks and the file index.js where you export the order in which the hooks will run. The create files named after the the hooks before. From there export a default function that takes as input the code and returns the transformed code or throws an error.

Loops

You can loop a filtered array using the syntax that json-query npm package uses. Example:

{{for model in models[type='Account']}}
const {{model.name}} = new Account()
{{/for}}

Conditionals

You can use normal javascript in if statements like below:

{{if model.type === 'Account' && model.name.startsWith('admin')}}
//{{model.name}} is an admin account
{{/if}}

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