@storybook/svelte/dist/esm/server/svelte-docgen-loader.js

Storybook for Svelte: Develop Svelte Component in isolation with Hot Reloading.

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import "core-js/modules/es.promise.js";
import svelteDoc from 'sveltedoc-parser';
import dedent from 'ts-dedent';
import * as path from 'path';
import * as fs from 'fs';
import { getOptions } from 'loader-utils';
import { preprocess } from 'svelte/compiler';
import { logger } from '@storybook/node-logger'; // From https://github.com/sveltejs/svelte/blob/8db3e8d0297e052556f0b6dde310ef6e197b8d18/src/compiler/compile/utils/get_name_from_filename.ts
// Copied because it is not exported from the compiler

function getNameFromFilename(filename) {
  if (!filename) return null;
  var parts = filename.split(/[/\\]/).map(encodeURI);

  if (parts.length > 1) {
    var index_match = parts[parts.length - 1].match(/^index(\.\w+)/);

    if (index_match) {
      parts.pop();
      parts[parts.length - 1] += index_match[1];
    }
  }

  var base = parts.pop().replace(/%/g, 'u').replace(/\.[^.]+$/, '').replace(/[^a-zA-Z_$0-9]+/g, '_').replace(/^_/, '').replace(/_$/, '').replace(/^(\d)/, '_$1');

  if (!base) {
    throw new Error(`Could not derive component name from file ${filename}`);
  }

  return base[0].toUpperCase() + base.slice(1);
}
/**
 * webpack loader for sveltedoc-parser
 * @param source raw svelte component
 */


export default async function svelteDocgen(source) {
  // eslint-disable-next-line no-underscore-dangle
  var resource = this._module.resource;

  var svelteOptions = _objectSpread({}, getOptions(this));

  var preprocessOptions = svelteOptions.preprocess,
      _svelteOptions$logDoc = svelteOptions.logDocgen,
      logDocgen = _svelteOptions$logDoc === void 0 ? false : _svelteOptions$logDoc;
  var docOptions;

  if (preprocessOptions) {
    var src = fs.readFileSync(resource).toString();

    var _await$preprocess = await preprocess(src, preprocessOptions),
        fileContent = _await$preprocess.code;

    docOptions = {
      fileContent: fileContent
    };
  } else {
    docOptions = {
      filename: resource
    };
  } // set SvelteDoc options


  var options = _objectSpread(_objectSpread({}, docOptions), {}, {
    version: 3
  });

  var docgen = '';

  try {
    // FIXME
    // @ts-ignore
    var componentDoc = await svelteDoc.parse(options); // get filename for source content

    var file = path.basename(resource); // populate filename in docgen

    componentDoc.name = path.basename(file);
    var componentName = getNameFromFilename(resource);
    docgen = dedent`

              ${componentName}.__docgen = ${JSON.stringify(componentDoc)};
              `;
  } catch (error) {
    if (logDocgen) {
      logger.error(error);
    }
  } // inject __docgen prop in svelte component


  var output = source + docgen;
  return output;
}