This code snippet determines the operating system and sets a variable notebook to the path of a corresponding Jupyter Notebook file for either Windows or macOS. If the platform is neither Windows nor macOS, it signals an error.

Run example

npm run import -- "What is Docker"

What is Docker

$.async();
var path = require('path');
if (process.platform === 'win32') {
    var notebook = 'How to install Docker on Windows.ipynb';
} else if (process.platform === 'darwin') {
    var notebook = 'How to install Docker on Mac.ipynb';
} else {
    $.done('docker not installed');
}

// Import required modules and configure async behavior
const async = require('async');
const path = require('path');

// Define a function to get the platform-independent notebook path
function getNotebookPath() {
    /**
     * Returns the path to the notebook file based on the current platform.
     * @returns {string} Path to the notebook file.
     */
    const notebookPaths = {
        win32: 'How to install Docker on Windows.ipynb',
        darwin: 'How to install Docker on Mac.ipynb',
    };

    // Use the process.platform property to determine the current platform
    return notebookPaths[process.platform] || 'docker not installed';
}

// Use async to execute the code in the notebook
async.getNotebookPath(function(err, notebookPath) {
    if (err) {
        console.error(err);
        return;
    }

    // Check if the notebook path is valid (not "docker not installed")
    if (notebookPath!== 'docker not installed') {
        // If valid, you can use the notebook path (e.g., to load the notebook in a Jupyter environment)
        console.log(`Notebook path: ${notebookPath}`);
    } else {
        console.log('docker not installed');
    }
});

This code snippet checks the operating system and sets a variable notebook to the path of a Jupyter Notebook file based on the platform.

Breakdown:

1. $.async();:

   • This line likely initializes an asynchronous operation using a variable $ (possibly a custom function or library).

2. var path = require('path');:

   • This line imports the built-in path module, which provides utilities for working with file and directory paths.

3. if (process.platform === 'win32') { ... } else if (process.platform === 'darwin') { ... } else { ... }:

   • This block checks the operating system using process.platform:
     • If it's Windows ('win32'), it sets notebook to 'How to install Docker on Windows.ipynb'.
     • If it's macOS ('darwin'), it sets notebook to 'How to install Docker on Mac.ipynb'.
     • Otherwise (presumably Linux or another platform), it calls $.done('docker not installed'), likely signaling an error or completion with a message.

In essence:

• The code determines the operating system and prepares a path to a Jupyter Notebook file specific to that platform.