Importing local notebook

[nicola]

What is your strategy for importing local notebooks (I also want to keep supporting importing them from observablehq)?

[bryangingechen]

If you put your local notebook modules in notebooks/, you could try something like this (not tested, but hopefully you see the idea)?

// copied from src/utils.js
const extractPath = path => {
  let source = path;
  let m;

  // "https://api.observablehq.com/@jashkenas/inputs.js?v=3" => strip off ".js"
  if ((m = /\.js(\?|$)/i.exec(source))) source = source.slice(0, m.index);

  // "74f872c4fde62e35" => "d/..."
  if ((m = /^[0-9a-f]{16}$/i.test(source))) source = `d/${source}`;

  // link of notebook
  if ((m = /^https:\/\/(api\.|beta\.|)observablehq\.com\//i.exec(source)))
    source = source.slice(m[0].length);
  return source;
};

// copied from src/compiler.js
const defaultResolver = async path => {
  const source = extractPath(path);
  return import(`https://api.observablehq.com/${source}.js?v=3`).then(
    m => m.default
  );
};

const resolve = async path => {
  let module;
  try {
    // look for the notebook module on observablehq.com
    return await defaultResolver(path);
  } catch (e) { // if loading fails
    // look for the notebook module in the notebooks/ directory
    const source = extractPath(path);
    return (await import(`notebooks/${source}.js`)).default;
  }
};

const compile = new Compiler(resolve);

You could also write logic in the resolve function that parses the notebook name to decide where to load a notebook module from. E.g. if your notebook has:

import {cell} from "local/notebook"

Then your resolve function is passed local/notebook and it could detect that it starts with local and act accordingly.

[nicola]

awesome I will try this soon! we should make this somehow a default in the library

[RandomFractals]

btw, I am planning to use this lib for importing local and remote ojs notebooks in this ext. for vscode I've been working on:

https://github.com/RandomFractals/js-notebook-inspector

relevant issue in my repo: https://github.com/RandomFractals/js-notebook-inspector/issues/29