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glob from 'glob';\nimport { partition, flatMap, isString, toPairs, fromPairs, sortBy } from 'lodash';\n\nimport { exploreBundle, UNMAPPED_KEY, SPECIAL_FILENAMES } from './explore';\nimport { AppError, getErrorMessage } from './app-error';\nimport { formatOutput, saveOutputToFile } from './output';\nimport { addCoverageRanges } from './coverage';\n\nimport type {\n Bundle,\n BundlesAndFileTokens,\n ExploreBundleResult,\n ExploreErrorResult,\n ExploreOptions,\n ExploreResult,\n} from './types';\n\nfunction adjustOptions(options: ExploreOptions): ExploreOptions {\n /* Unmapped bytes cannot be calculate because it's impossible to get total size by summing files'\n sizes when calculating gzip size for a file. */\n if (options.gzip) {\n options.onlyMapped = true;\n }\n\n return options;\n}\n\n/**\n * Analyze bundle(s)\n */\nexport async function explore(\n bundlesAndFileTokens: BundlesAndFileTokens,\n options: ExploreOptions = {}\n): Promise<ExploreResult> {\n bundlesAndFileTokens = Array.isArray(bundlesAndFileTokens)\n ? bundlesAndFileTokens\n : [bundlesAndFileTokens];\n\n if (bundlesAndFileTokens.length === 0) {\n throw new AppError({ code: 'NoBundles' });\n }\n\n adjustOptions(options);\n\n // Separate bundles from file tokens\n const [fileTokens, bundles] = partition(bundlesAndFileTokens, isString);\n\n // Get bundles from file tokens\n bundles.push(...getBundles(fileTokens));\n\n addCoverageRanges(bundles, options.coverage);\n\n const results = await Promise.all(\n bundles.map((bundle) =>\n exploreBundle(bundle, options).catch<ExploreErrorResult>((error) =>\n onExploreError(bundle, error)\n )\n )\n );\n\n const exploreResult = getExploreResult(results, options);\n\n // Reject if none of results is successful\n if (exploreResult.bundles.length === 0) {\n return Promise.reject(exploreResult);\n }\n\n saveOutputToFile(exploreResult, options);\n\n return exploreResult;\n}\n\n/**\n * Expand list of file tokens into a list of bundles\n */\nexport function getBundles(fileTokens: string[]): Bundle[] {\n const filenames = flatMap(fileTokens, (filePath) =>\n glob.hasMagic(filePath) ? expandGlob(filePath) : filePath\n );\n\n const [mapFilenames, codeFilenames] = partition(filenames, (filename) =>\n filename.endsWith('.map')\n );\n\n return codeFilenames.map<Bundle>((code) => ({\n code,\n map: mapFilenames.find((filename) => filename === `${code}.map`),\n }));\n}\n\nfunction expandGlob(pattern: string): string[] {\n // Make sure pattern match `.map` files as well\n if (pattern.endsWith('.js')) {\n pattern = `${pattern}?(.map)`;\n }\n\n return glob.sync(pattern);\n}\n\nexport function getBundleName(bundle: Bundle): string {\n return Buffer.isBuffer(bundle.code) ? 'Buffer' : bundle.code;\n}\n\n/**\n * Handle error during bundle processing\n */\nfunction onExploreError(bundle: Bundle, error: NodeJS.ErrnoException): ExploreErrorResult {\n return {\n bundleName: getBundleName(bundle),\n code: error.code || 'Unknown',\n message: error.message,\n error,\n };\n}\n\nfunction sortFilenames(bundles: ExploreBundleResult[]): ExploreBundleResult[] {\n return bundles.map((bundle) => ({\n ...bundle,\n files: fromPairs(sortBy(toPairs(bundle.files), 0)),\n }));\n}\n\nfunction getExploreResult(\n results: (ExploreBundleResult | ExploreErrorResult)[],\n options: ExploreOptions\n): ExploreResult {\n const [bundles, errors] = partition(\n results,\n (result): result is ExploreBundleResult => 'files' in result\n );\n\n let sortedBundles = sortBy(bundles, (bundle) => bundle.bundleName);\n\n if (options.sort) {\n sortedBundles = sortFilenames(sortedBundles);\n }\n\n errors.push(...getPostExploreErrors(bundles));\n\n return {\n bundles: sortedBundles,\n errors,\n ...(bundles.length > 0 && { output: formatOutput(sortedBundles, options) }),\n };\n}\n\nfunction getPostExploreErrors(exploreBundleResults: ExploreBundleResult[]): ExploreErrorResult[] {\n const errors: ExploreErrorResult[] = [];\n\n const isSingleBundle = exploreBundleResults.length === 1;\n\n for (const result of exploreBundleResults) {\n const { bundleName, files, totalBytes } = result;\n\n // Check if source map contains only one file - this make result useless when exploring single bundle\n if (isSingleBundle) {\n const filenames = Object.keys(files).filter(\n (filename) => !SPECIAL_FILENAMES.includes(filename)\n );\n\n if (filenames.length === 1) {\n errors.push({\n bundleName,\n isWarning: true,\n code: 'OneSourceSourceMap',\n message: getErrorMessage({ code: 'OneSourceSourceMap', filename: filenames[0] }),\n });\n }\n }\n\n if (files[UNMAPPED_KEY] !== undefined) {\n const { size: unmappedBytes } = files[UNMAPPED_KEY];\n\n if (unmappedBytes) {\n errors.push({\n bundleName,\n isWarning: true,\n code: 'UnmappedBytes',\n message: getErrorMessage({ code: 'UnmappedBytes', unmappedBytes, totalBytes }),\n });\n }\n }\n }\n\n return errors;\n}\n"]} |