DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
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{"version":3,"sources":["../../../../src/build/webpack/loaders/next-barrel-loader.ts"],"sourcesContent":["/**\n * ## Barrel Optimizations\n *\n * This loader is used to optimize the imports of \"barrel\" files that have many\n * re-exports. Currently, both Node.js and Webpack have to enter all of these\n * submodules even if we only need a few of them.\n *\n * For example, say a file `foo.js` with the following contents:\n *\n * export { a } from './a'\n * export { b } from './b'\n * export { c } from './c'\n * ...\n *\n * If the user imports `a` only, this loader will accept the `names` option to\n * be `['a']`. Then, it request the \"__barrel_transform__\" SWC transform to load\n * `foo.js` and receive the following output:\n *\n * export const __next_private_export_map__ = '[[\"a\",\"./a\",\"a\"],[\"b\",\"./b\",\"b\"],[\"c\",\"./c\",\"c\"],...]'\n *\n * format: '[\"<imported identifier>\", \"<import path>\", \"<exported name>\"]'\n * e.g.: import { a as b } from './module-a' => '[\"b\", \"./module-a\", \"a\"]'\n *\n * The export map, generated by SWC, is a JSON that represents the exports of\n * that module, their original file, and their original name (since you can do\n * `export { a as b }`).\n *\n * Then, this loader can safely remove all the exports that are not needed and\n * re-export the ones from `names`:\n *\n * export { a } from './a'\n *\n * That's the basic situation and also the happy path.\n *\n *\n *\n * ## Wildcard Exports\n *\n * For wildcard exports (e.g. `export * from './a'`), it becomes a bit more complicated.\n * Say `foo.js` with the following contents:\n *\n * export * from './a'\n * export * from './b'\n * export * from './c'\n * ...\n *\n * If the user imports `bar` from it, SWC can never know which files are going to be\n * exporting `bar`. So, we have to keep all the wildcard exports and do the same\n * process recursively. This loader will return the following output:\n *\n * export * from '__barrel_optimize__?names=bar&wildcard!=!./a'\n * export * from '__barrel_optimize__?names=bar&wildcard!=!./b'\n * export * from '__barrel_optimize__?names=bar&wildcard!=!./c'\n * ...\n *\n * The \"!=!\" tells Webpack to use the same loader to process './a', './b', and './c'.\n * After the recursive process, the \"inner loaders\" will either return an empty string\n * or:\n *\n * export * from './target'\n *\n * Where `target` is the file that exports `bar`.\n *\n *\n *\n * ## Non-Barrel Files\n *\n * If the file is not a barrel, we can't apply any optimizations. That's because\n * we can't easily remove things from the file. For example, say `foo.js` with:\n *\n * const v = 1\n * export function b () {\n * return v\n * }\n *\n * If the user imports `b` only, we can't remove the `const v = 1` even though\n * the file is side-effect free. In these caes, this loader will simply re-export\n * `foo.js`:\n *\n * export * from './foo'\n *\n * Besides these cases, this loader also carefully handles the module cache so\n * SWC won't analyze the same file twice, and no instance of the same file will\n * be accidentally created as different instances.\n */\n\nimport type webpack from 'webpack'\n\nimport path from 'path'\nimport { transform } from '../../swc'\n\n// This is a in-memory cache for the mapping of barrel exports. This only applies\n// to the packages that we optimize. It will never change (e.g. upgrading packages)\n// during the lifetime of the server so we can safely cache it.\n// There is also no need to collect the cache for the same reason.\nconst barrelTransformMappingCache = new Map<\n string,\n {\n exportList: [string, string, string][]\n wildcardExports: string[]\n isClientEntry: boolean\n } | null\n>()\n\nasync function getBarrelMapping(\n resourcePath: string,\n swcCacheDir: string,\n resolve: (context: string, request: string) => Promise<string>,\n fs: {\n readFile: (\n path: string,\n callback: (err: any, data: string | Buffer | undefined) => void\n ) => void\n }\n) {\n if (barrelTransformMappingCache.has(resourcePath)) {\n return barrelTransformMappingCache.get(resourcePath)!\n }\n\n // This is a SWC transform specifically for `optimizeBarrelExports`. We don't\n // care about other things but the export map only.\n async function transpileSource(\n filename: string,\n source: string,\n isWildcard: boolean\n ) {\n const isTypeScript = filename.endsWith('.ts') || filename.endsWith('.tsx')\n return new Promise<string>((res) =>\n transform(source, {\n filename,\n inputSourceMap: undefined,\n sourceFileName: filename,\n optimizeBarrelExports: {\n wildcard: isWildcard,\n },\n jsc: {\n parser: {\n syntax: isTypeScript ? 'typescript' : 'ecmascript',\n [isTypeScript ? 'tsx' : 'jsx']: true,\n },\n experimental: {\n cacheRoot: swcCacheDir,\n },\n },\n }).then((output) => {\n res(output.code)\n })\n )\n }\n\n // Avoid circular `export *` dependencies\n const visited = new Set<string>()\n async function getMatches(\n file: string,\n isWildcard: boolean,\n isClientEntry: boolean\n ) {\n if (visited.has(file)) {\n return null\n }\n visited.add(file)\n\n const source = await new Promise<string>((res, rej) => {\n fs.readFile(file, (err, data) => {\n if (err || data === undefined) {\n rej(err)\n } else {\n res(data.toString())\n }\n })\n })\n\n const output = await transpileSource(file, source, isWildcard)\n\n const matches = output.match(\n /^([^]*)export (const|var) __next_private_export_map__ = ('[^']+'|\"[^\"]+\")/\n )\n if (!matches) {\n return null\n }\n\n const matchedDirectives = output.match(\n /^([^]*)export (const|var) __next_private_directive_list__ = '([^']+)'/\n )\n const directiveList = matchedDirectives\n ? JSON.parse(matchedDirectives[3])\n : []\n // \"use client\" in barrel files has to be transferred to the target file.\n isClientEntry = directiveList.includes('use client')\n\n let exportList = JSON.parse(matches[3].slice(1, -1)) as [\n string,\n string,\n string,\n ][]\n const wildcardExports = [\n ...output.matchAll(/export \\* from \"([^\"]+)\"/g),\n ].map((match) => match[1])\n\n // In the wildcard case, if the value is exported from another file, we\n // redirect to that file (decl[0]). Otherwise, export from the current\n // file itself.\n if (isWildcard) {\n for (const decl of exportList) {\n decl[1] = file\n decl[2] = decl[0]\n }\n }\n\n // This recursively handles the wildcard exports (e.g. `export * from './a'`)\n if (wildcardExports.length) {\n await Promise.all(\n wildcardExports.map(async (req) => {\n const targetPath = await resolve(\n path.dirname(file),\n req.replace('__barrel_optimize__?names=__PLACEHOLDER__!=!', '')\n )\n\n const targetMatches = await getMatches(\n targetPath,\n true,\n isClientEntry\n )\n\n if (targetMatches) {\n // Merge the export list\n exportList = exportList.concat(targetMatches.exportList)\n }\n })\n )\n }\n\n return {\n exportList,\n wildcardExports,\n isClientEntry,\n }\n }\n\n const res = await getMatches(resourcePath, false, false)\n barrelTransformMappingCache.set(resourcePath, res)\n\n return res\n}\n\nconst NextBarrelLoader = async function (\n this: webpack.LoaderContext<{\n names: string[]\n swcCacheDir: string\n }>\n) {\n this.async()\n this.cacheable(true)\n\n const { names, swcCacheDir } = this.getOptions()\n\n // For barrel optimizations, we always prefer the \"module\" field over the\n // \"main\" field because ESM handling is more robust with better tree-shaking.\n const resolve = this.getResolve({\n mainFields: ['module', 'main'],\n })\n\n const mapping = await getBarrelMapping(\n this.resourcePath,\n swcCacheDir,\n resolve,\n this.fs\n )\n\n // `resolve` adds all sub-paths to the dependency graph. 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That will create these imports with different names as\n // different modules instances.\n this.callback(null, `export * from ${JSON.stringify(this.resourcePath)}`)\n return\n }\n\n const exportList = mapping.exportList\n const isClientEntry = mapping.isClientEntry\n const exportMap = new Map<string, [string, string]>()\n for (const [name, filePath, orig] of exportList) {\n exportMap.set(name, [filePath, orig])\n }\n\n let output = ''\n let missedNames: string[] = []\n for (const name of names) {\n // If the name matches\n if (exportMap.has(name)) {\n const decl = exportMap.get(name)!\n\n if (decl[1] === '*') {\n output += `\\nexport * as ${name} from ${JSON.stringify(decl[0])}`\n } else if (decl[1] === 'default') {\n output += `\\nexport { default as ${name} } from ${JSON.stringify(\n decl[0]\n )}`\n } else if (decl[1] === name) {\n output += `\\nexport { ${name} } from ${JSON.stringify(decl[0])}`\n } else {\n output += `\\nexport { ${decl[1]} as ${name} } from ${JSON.stringify(\n 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