The code imports necessary modules and data, and defines the kernelInfoInterface object with various properties that provide information about a kernel. The nativeKernelInfo function takes a kernel_info object, extends it with additional information, and returns an object with language, kernel, and meta data.

Run example

npm run import -- "kernel info interface"

kernel info interface

var importer = require('../Core');
var interface = importer.import("enforcing an interface");
var languageInterface = importer.import("kernel language interface");

var PACKAGE_VERSION = require('../package.json').version;

var kernelInfoInterface = {
    // from the docs 
    protocol_version: [void 0, ''],
    implementation: [void 0, ''],
    implementation_version: [void 0, ''],
    banner: [void 0, ''],
    language_info: languageInterface,
    help_links: [void 0, []],
    // custom, path to it's own script for installing
    install_config: [void 0, '']
}

function nativeKernelInfo(kernel_info) {
    if(!kernel_info) {
        return;
    }
    var {
        language_info,
        protocol_version,
        implementation,
        implementation_version,
        banner
    } = kernel_info; // for easy reading
    
    //if(typeof language_info === 'function')
    //    kernel_info.language_info = language_info(language_info);
    kernel_info.language_info = interface(language_info, languageInterface);
    language_info.name = language_info.name || implementation;
    var info = interface(kernel_info, kernelInfoInterface)
    var self = extend(meta_info, {
        protocol_version: protocol_version || '5.1',
        implementation: implementation || language_info.name,
        implementation_version: implementation_version || PACKAGE_VERSION,
        banner: banner || language_info.language
    })
    return self;
}

module.exports = {
    kernelInfoInterface,
    nativeKernelInfo
};

// Import required modules and constants
const { importModules } = require('../Core');
const { getKernelInfoInterface, getLanguageInterface } = importModules(['enforcing-an-interface', 'kernel-language-interface']);

const packageJson = require('../package.json');
const { version: PACKAGE_VERSION } = packageJson;

// Define the kernel info interface
const kernelInfoInterface = {
  /**
   * The protocol version of the kernel.
   * @type {string[]}
   */
  protocol_version: [null, ''],
  /**
   * The implementation of the kernel.
   * @type {string[]}
   */
  implementation: [null, ''],
  /**
   * The implementation version of the kernel.
   * @type {string[]}
   */
  implementation_version: [null, ''],
  /**
   * The banner of the kernel.
   * @type {string[]}
   */
  banner: [null, ''],
  /**
   * The language information of the kernel.
   * @type {object}
   */
  language_info: getLanguageInterface(),
  /**
   * The help links of the kernel.
   * @type {string[][]}
   */
  help_links: [null, []],
  /**
   * The install configuration of the kernel.
   * @type {string}
   */
  install_config: [null, '']
};

/**
 * Returns the native kernel info by enforcing the kernel info interface.
 * @param {object} kernel_info - The kernel info object.
 * @returns {object} The native kernel info object.
 */
function nativeKernelInfo(kernel_info) {
  if (!kernel_info) {
    return;
  }

  // Destructure the kernel info object for easier reading
  const {
    language_info,
    protocol_version,
    implementation,
    implementation_version,
    banner
  } = kernel_info;

  // Enforce the language info interface
  const enforcedLanguageInfo = getKernelInfoInterface().language_info(language_info, getLanguageInterface());

  // Merge the kernel info object with the enforced language info
  const mergedKernelInfo = {
   ...kernel_info,
    language_info: enforcedLanguageInfo
  };

  // Merge the protocol version, implementation, implementation version, and banner
  const mergedInfo = {
   ...mergedKernelInfo,
    protocol_version: protocol_version || '5.1',
    implementation: implementation || enforcedLanguageInfo.name,
    implementation_version: implementation_version || PACKAGE_VERSION,
    banner: banner || enforcedLanguageInfo.language
  };

  return mergedInfo;
}

// Export the kernel info interface and the native kernel info function
module.exports = {
  kernelInfoInterface,
  nativeKernelInfo
};

Code Breakdown

Importing Modules and Data

The code starts by importing necessary modules and data:

• importer is required from ../Core and used to import other modules: interface and languageInterface.
• PACKAGE_VERSION is extracted from ../package.json.

Defining the kernelInfoInterface Object

The kernelInfoInterface object is defined with several properties, including:

• protocol_version, implementation, implementation_version, and banner, which are all initialized with default values.
• language_info, which is set to the languageInterface object.
• help_links and install_config are initialized with default values.

Defining the nativeKernelInfo Function

The nativeKernelInfo function takes a kernel_info object as an argument and returns an extended version of it. Here's what it does:

• It checks if kernel_info is truthy and returns immediately if it's not.
• It extracts several properties from kernel_info and assigns them to local variables.
• It applies the interface function to the language_info property, using languageInterface as the interface.
• It sets the name property of language_info to either language_info.name or implementation.
• It applies the interface function to the entire kernel_info object, using kernelInfoInterface as the interface.
• It creates a new object self by extending meta_info with the extracted properties and returns it.

Exporting Modules

Finally, the code exports the kernelInfoInterface object and the nativeKernelInfo function as a module:

• module.exports = { kernelInfoInterface, nativeKernelInfo }