@storybook/addon-docs/dist/esm/frameworks/svelte/svelte-docgen-loader.js

Document component usage and properties in Markdown

import "core-js/modules/es.promise.js";
import "core-js/modules/es.object.freeze.js";

var _templateObject;

import "regenerator-runtime/runtime.js";

function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

import "core-js/modules/es.array.map.js";
import "core-js/modules/es.string.split.js";
import "core-js/modules/es.regexp.exec.js";
import "core-js/modules/es.string.match.js";
import "core-js/modules/es.string.replace.js";
import "core-js/modules/es.array.slice.js";
import "core-js/modules/es.object.assign.js";
import "core-js/modules/es.object.to-string.js";
import "core-js/modules/es.regexp.to-string.js";
import "core-js/modules/es.function.name.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 ".concat(filename));
  }

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


export default function svelteDocgen(_x) {
  return _svelteDocgen.apply(this, arguments);
}

function _svelteDocgen() {
  _svelteDocgen = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(source) {
    var resource, svelteOptions, preprocessOptions, _svelteOptions$logDoc, logDocgen, docOptions, src, _yield$preprocess, fileContent, options, docgen, componentDoc, file, componentName, output;

    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            // eslint-disable-next-line no-underscore-dangle
            resource = this._module.resource;
            svelteOptions = Object.assign({}, getOptions(this));
            preprocessOptions = svelteOptions.preprocess, _svelteOptions$logDoc = svelteOptions.logDocgen, logDocgen = _svelteOptions$logDoc === void 0 ? false : _svelteOptions$logDoc;

            if (!preprocessOptions) {
              _context.next = 12;
              break;
            }

            src = fs.readFileSync(resource).toString();
            _context.next = 7;
            return preprocess(src, preprocessOptions);

          case 7:
            _yield$preprocess = _context.sent;
            fileContent = _yield$preprocess.code;
            docOptions = {
              fileContent: fileContent
            };
            _context.next = 13;
            break;

          case 12:
            docOptions = {
              filename: resource
            };

          case 13:
            // set SvelteDoc options
            options = Object.assign({}, docOptions, {
              version: 3
            });
            docgen = '';
            _context.prev = 15;
            _context.next = 18;
            return svelteDoc.parse(options);

          case 18:
            componentDoc = _context.sent;
            // get filename for source content
            file = path.basename(resource); // populate filename in docgen

            componentDoc.name = path.basename(file);
            componentName = getNameFromFilename(resource);
            docgen = dedent(_templateObject || (_templateObject = _taggedTemplateLiteral(["\n\n              ", ".__docgen = ", ";\n              "])), componentName, JSON.stringify(componentDoc));
            _context.next = 28;
            break;

          case 25:
            _context.prev = 25;
            _context.t0 = _context["catch"](15);

            if (logDocgen) {
              logger.error(_context.t0);
            }

          case 28:
            // inject __docgen prop in svelte component
            output = source + docgen;
            return _context.abrupt("return", output);

          case 30:
          case "end":
            return _context.stop();
        }
      }
    }, _callee, this, [[15, 25]]);
  }));
  return _svelteDocgen.apply(this, arguments);
}