@web/storybook-builder/dist/generate-stories-script.js

Storybook builder powered by `@web/dev-server`

"use strict";
// based on https://github.com/storybookjs/storybook/blob/v8.5.0/code/builders/builder-vite/src/codegen-importfn-script.ts
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateStoriesScript = void 0;
const pluginutils_1 = require("@rollup/pluginutils");
const node_path_1 = require("node:path");
const list_stories_1 = require("./list-stories");
async function generateStoriesScript(options) {
    // First we need to get an array of stories and their absolute paths.
    const stories = await (0, list_stories_1.listStories)(options);
    // We can then call toImportFn to create a function that can be used to load each story dynamically.
    return await toImportFn(stories);
}
exports.generateStoriesScript = generateStoriesScript;
/**
 * This function takes an array of stories and creates a mapping between the stories' relative paths
 * to the working directory and their dynamic imports. The import is done in an asynchronous
 * function to delay loading and to allow rollup to split the code into smaller chunks. It then
 * creates a function, `importFn(path)`, which resolves a path to an import function and this is
 * called by Storybook to fetch a story dynamically when needed.
 *
 * @param stories An array of absolute story paths.
 */
async function toImportFn(stories) {
    const objectEntries = stories.map(file => {
        const relativePath = (0, pluginutils_1.normalizePath)((0, node_path_1.relative)(process.cwd(), file));
        const importPath = toImportPath(relativePath);
        let actualPath = file;
        if (actualPath.endsWith('.mdx')) {
            actualPath = `${actualPath}.js`;
        }
        return `  '${importPath}': () => import('${actualPath}')`;
    });
    return `
const importers = {
${objectEntries.join(',\n')}
};

export function importFn(path) {
  return importers[path]();
}
  `.trim();
}
/**
 * Paths get passed either with no leading './' - e.g. `src/Foo.stories.js`,
 * or with a leading `../` (etc), e.g. `../src/Foo.stories.js`.
 * We want to deal in importPaths relative to the working dir, so we normalize
 */
function toImportPath(relativePath) {
    return relativePath.startsWith('../') ? relativePath : `./${relativePath}`;
}
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