This code provides a Babel plugin that modifies notebook code before transpilation, likely for a specific environment, by applying a series of transformations to the code.

Run example

npm run import -- "babel transpiler"

babel transpiler

var babel = require('babel-core')
var toBabel = require('estree-to-babel');
var importer = require('../Core')
var {selectAst} = importer.import("select code tree")
var {selectAcorn} = importer.import("select acorn tree")
var {htmlToTree} = importer.import("html to tree")
var {addImports} = importer.import("add missing imports")
var {replaceCore} = importer.import("replace core requirement")
var {replaceImports} = importer.import("replace notebook import")

// TODO: convert these to transpiler tools like Add, Replace, Remove
var transpilePlugins = [
    addImports,
    replaceImports,
    replaceCore,
]

function transpileNotebook() {
    return {
        manipulateOptions(opts, parserOpts) {
            opts.parserOpts = {
                parser(code, opts) {
                    code = transpilePlugins.reduce((code, plugin) => {
                        return plugin(code, opts.sourceFileName)
                    }, code)
                    var ast = toBabel(code)
                    return ast
                },
            };
        },
    };
}

function babelTranspile() {
    return {
        plugins: [
            transpileNotebook
        ]
    }
}

module.exports = babelTranspile

// Import required modules
const babel = require('babel-core');
const toBabel = require('estree-to-babel');
const { selectAst, selectAcorn } = require('../Core').import('code-tree-selection');
const { htmlToTree } = require('../Core').import('html-to-tree');
const { addImports, replaceImports, replaceCore } = require('../Core').import([
  'add-missing-imports',
 'replace-notebook-import',
 'replace-core-requirement',
]);

// Define transpiler plugins
const transpilePlugins = [
  addImports,
  replaceImports,
  replaceCore,
];

// Define the transpiler function
function transpileNotebook(opts, code) {
  return transpilePlugins.reduce((code, plugin) => plugin(code, opts.sourceFileName), code);
}

// Define the babel transpiler configuration
function babelTranspile() {
  return {
    // Define the babel parser options
    parser: {
      // Transpile the code before parsing it
      transpile(code, opts) {
        return transpileNotebook(opts, code);
      },
      // Transform the code into an AST using estree-to-babel
      transform(code) {
        return toBabel(code);
      },
    },
  };
}

// Export the babel transpiler configuration
module.exports = babelTranspile;

This code defines a Babel plugin for transpiling notebook code, likely for a specific environment or framework.

Here's a breakdown:

1. Imports:

   • babel-core: The core Babel library for transpilation.
   • estree-to-babel: A utility for converting ESTree (Abstract Syntax Tree) to Babel's AST format.
   • importer: A module for importing other modules.
   • Various functions from importer for selecting nodes in ASTs, converting HTML to ASTs, adding imports, and replacing core requirements.

2. transpilePlugins:

   • An array of functions that modify the code before transpilation.
   • These functions likely handle tasks like adding missing imports, replacing core requirements, and potentially other notebook-specific transformations.

3. transpileNotebook Function:

   • Defines a Babel plugin that manipulates the transpilation options.
   • It modifies the parser to apply the transpilePlugins to the code before parsing it into an AST.

4. babelTranspile Function:

   • Creates a Babel configuration object that includes the transpileNotebook plugin.

5. Module Exports:

   • Exports the babelTranspile function, which can be used to configure Babel for transpiling notebook code.