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{ createPackageFromStreams, AsarStreamType, AsarDirectory } from \"@electron/asar\"\nimport { isEmptyOrSpaces, log } from \"builder-util\"\nimport { exists, Filter, FilterStats } from \"builder-util/out/fs\"\nimport * as fs from \"fs-extra\"\nimport { readlink } from \"fs-extra\"\nimport * as path from \"path\"\nimport { AsarOptions } from \"../options/PlatformSpecificBuildOptions\"\nimport { PlatformPackager } from \"../platformPackager\"\nimport { ResolvedFileSet, getDestinationPath } from \"../util/appFileCopier\"\nimport { detectUnpackedDirs } from \"./unpackDetector\"\nimport { Readable } from \"stream\"\nimport * as os from \"os\"\n\nconst resolvePath = async (file: string | undefined): Promise => (file && (await exists(file)) ? fs.realpath(file).catch(() => path.resolve(file)) : undefined)\nconst resolvePaths = async (filepaths: (string | undefined)[]) => {\n return Promise.all(filepaths.map(resolvePath)).then(paths => paths.filter((it): it is string => it != null))\n}\n\nconst DENYLIST = resolvePaths([\n \"/usr\",\n \"/lib\",\n \"/bin\",\n \"/sbin\",\n \"/etc\",\n\n \"/tmp\",\n \"/var\", // block whole /var by default. If $HOME is under /var, it's explicitly in ALLOWLIST - https://github.com/electron-userland/electron-builder/issues/9025#issuecomment-3575380041\n\n // macOS system directories\n \"/System\",\n \"/Library\",\n \"/private\",\n\n // Windows system directories\n process.env.SystemRoot,\n process.env.WINDIR,\n])\n\nconst ALLOWLIST = resolvePaths([\n os.tmpdir(), // always allow temp dir\n os.homedir(), // always allow home dir\n])\n\n/** @internal */\nexport class AsarPackager {\n private readonly outFile: string\n\n constructor(\n readonly packager: PlatformPackager,\n private readonly config: {\n defaultDestination: string\n resourcePath: string\n options: AsarOptions\n unpackPattern: Filter | undefined\n }\n ) {\n this.outFile = path.join(config.resourcePath, `app.asar`)\n }\n\n async pack(fileSets: Array) {\n const orderedFileSets = [\n // Write dependencies first to minimize offset changes to asar header\n ...fileSets.slice(1),\n\n // Finish with the app files that change most often\n fileSets[0],\n ].map(set => this.orderFileSet(set))\n\n const streams = await this.processFileSets(orderedFileSets)\n await this.executeElectronAsar(streams)\n }\n\n private async executeElectronAsar(streams: AsarStreamType[]) {\n // override logger temporarily to clean up console (electron/asar does some internal logging that blogs up the default electron-builder logs)\n const consoleLogger = console.log\n console.log = (...args) => {\n if (args[0] === \"Ordering file has 100% coverage.\") {\n return // no need to log, this means our ordering logic is working correctly\n }\n log.info({ args }, \"logging @electron/asar\")\n }\n await createPackageFromStreams(this.outFile, streams)\n console.log = consoleLogger\n }\n\n private async processFileSets(fileSets: ResolvedFileSet[]): Promise {\n const unpackedPaths = new Set()\n if (this.config.options.smartUnpack !== false) {\n for (const fileSet of fileSets) {\n detectUnpackedDirs(fileSet, unpackedPaths)\n }\n }\n\n const resultsMap = new Map()\n const streamOrdering: string[] = []\n const normalizedUnpackedPaths = Array.from(unpackedPaths).map(p => path.normalize(p))\n\n // Check whether a file or directory should be unpacked, using pre-normalized unpacked paths and early returns\n const isUnpacked = (dir: string, file?: string, stat?: FilterStats): boolean => {\n const normalizedDir = path.normalize(dir)\n\n // Check file pattern first (most specific)\n if (!isEmptyOrSpaces(file) && stat && this.config.unpackPattern?.(file, stat)) {\n return true\n }\n\n // Check if path is within any unpacked directory\n for (const unpackedPath of normalizedUnpackedPaths) {\n if (normalizedDir === unpackedPath || normalizedDir.startsWith(unpackedPath + path.sep)) {\n return true\n }\n }\n\n return false\n }\n\n // First pass: process all files in order, ensuring parent directories exist\n for (const fileSet of fileSets) {\n // Don't use Promise.all, we need to retain order of execution/iteration through the already-ordered fileset\n for (const [index, file] of fileSet.files.entries()) {\n const transformedData = fileSet.transformedFiles?.get(index)\n const stat = fileSet.metadata.get(file)!\n const destination = path.relative(this.config.defaultDestination, getDestinationPath(file, fileSet))\n\n // Ensure parent directories exist before processing file\n this.ensureParentDirectories(destination, resultsMap, streamOrdering)\n\n const result = await this.processFileOrSymlink({\n file,\n destination,\n fileSet,\n transformedData,\n stat,\n isUnpacked,\n })\n\n if (result && !resultsMap.has(result.path)) {\n resultsMap.set(result.path, result)\n streamOrdering.push(result.path)\n }\n }\n }\n\n // Second pass: propagate unpacked flag to parent directories\n for (const entry of resultsMap.values()) {\n if (entry.unpacked) {\n this.markParentDirectoriesAsUnpacked(entry.path, resultsMap, isUnpacked)\n }\n }\n\n // Build final results array maintaining processing order\n return streamOrdering.reduce((streams, path) => {\n const stream = resultsMap.has(path) ? resultsMap.get(path) : null\n if (stream != null) {\n streams.push(stream)\n }\n return streams\n }, [])\n }\n\n private ensureParentDirectories(destination: string, resultsMap: Map, streamOrdering: string[]): void {\n const parents: string[] = []\n let current = path.dirname(path.normalize(destination))\n\n // Collect all parent directories from deepest to root\n while (current !== \".\") {\n parents.unshift(current)\n current = path.dirname(current)\n }\n\n // Add parent directories in order (root to deepest)\n for (const parentPath of parents) {\n if (!resultsMap.has(parentPath)) {\n const dir: AsarDirectory = {\n type: \"directory\",\n path: parentPath,\n unpacked: false, // Updated in second pass if needed\n }\n resultsMap.set(parentPath, dir)\n streamOrdering.push(parentPath)\n }\n }\n }\n\n private markParentDirectoriesAsUnpacked(destination: string, resultsMap: Map, isUnpacked: (path: string) => boolean): void {\n let current = path.dirname(path.normalize(destination))\n\n while (current !== \".\") {\n const entry = resultsMap.get(current)\n if (entry && isUnpacked(current)) {\n entry.unpacked = true\n }\n current = path.dirname(current)\n }\n }\n\n private async processFileOrSymlink(options: {\n file: string\n destination: string\n stat: fs.Stats\n fileSet: ResolvedFileSet\n transformedData: string | Buffer | undefined\n isUnpacked: (dir: string, file?: string, stat?: FilterStats) => boolean\n }): Promise {\n const { isUnpacked, transformedData, file, destination, stat } = options\n const unpacked = isUnpacked(destination, file, stat)\n\n // Handle directories\n if (!stat.isFile() && !stat.isSymbolicLink()) {\n return { path: destination, unpacked, type: \"directory\" }\n }\n\n // Handle transformed data (pre-processed content)\n if (transformedData != null) {\n const size = Buffer.byteLength(transformedData)\n return {\n path: destination,\n streamGenerator: () =>\n new Readable({\n read() {\n this.push(transformedData)\n this.push(null)\n },\n }),\n unpacked,\n type: \"file\",\n stat: { mode: stat.mode, size },\n }\n }\n\n // verify that the file is not a direct link or symlinked to access/copy a system file\n await this.protectSystemAndUnsafePaths(file, await this.packager.info.getWorkspaceRoot())\n\n const baseConfig = {\n path: destination,\n streamGenerator: () => fs.createReadStream(file),\n unpacked,\n stat,\n }\n\n // Handle regular files\n if (!stat.isSymbolicLink()) {\n return { ...baseConfig, type: \"file\" }\n }\n\n // Handle symlinks - make relative to source location\n let link = await readlink(file)\n if (path.isAbsolute(link)) {\n link = path.relative(path.dirname(file), link)\n }\n\n return {\n ...baseConfig,\n type: \"link\",\n symlink: link,\n }\n }\n\n private orderFileSet(fileSet: ResolvedFileSet): ResolvedFileSet {\n const sortedFileEntries = Array.from(fileSet.files.entries())\n\n sortedFileEntries.sort(([, a], [, b]) => {\n if (a === b) {\n return 0\n }\n\n // Place addons last because their signature changes per build\n const isAAddon = a.endsWith(\".node\")\n const isBAddon = b.endsWith(\".node\")\n if (isAAddon && !isBAddon) {\n return 1\n }\n if (isBAddon && !isAAddon) {\n return -1\n }\n\n // Otherwise order by name\n return a < b ? -1 : 1\n })\n\n let transformedFiles: Map | undefined\n if (fileSet.transformedFiles) {\n transformedFiles = new Map()\n\n const indexMap = new Map()\n for (const [newIndex, [oldIndex]] of sortedFileEntries.entries()) {\n indexMap.set(oldIndex, newIndex)\n }\n\n for (const [oldIndex, value] of fileSet.transformedFiles) {\n const newIndex = indexMap.get(oldIndex)\n if (newIndex === undefined) {\n throw new Error(`Internal error: ${fileSet.files[oldIndex]} was lost while ordering asar`)\n }\n transformedFiles.set(newIndex, value)\n }\n }\n\n return {\n src: fileSet.src,\n destination: fileSet.destination,\n metadata: fileSet.metadata,\n files: sortedFileEntries.map(([, file]) => file),\n transformedFiles,\n }\n }\n\n private async checkAgainstRoots(target: string, allowRoots: string[]): Promise {\n const resolved = await resolvePath(target)\n if (resolved == null || isEmptyOrSpaces(resolved)) {\n return false\n }\n\n for (const root of allowRoots) {\n if (resolved === root || resolved.startsWith(root + path.sep)) {\n return true\n }\n }\n return false\n }\n\n private async protectSystemAndUnsafePaths(file: string, workspaceRoot: string): Promise {\n const resolved = await resolvePath(file)\n const logFields = { source: file, realPath: resolved }\n\n const workspace = await resolvePath(workspaceRoot)\n\n // If in workspace, always safe\n if (workspace && resolved?.startsWith(workspace)) {\n return\n }\n\n // Check allowlist (priority)\n if (await this.checkAgainstRoots(file, await ALLOWLIST)) {\n return\n }\n\n // Check denylist\n if (await this.checkAgainstRoots(file, await DENYLIST)) {\n log.error(logFields, `denied access to system or unsafe path`)\n throw new Error(`Cannot copy file [${file}] symlinked to file [${resolved}] outside the package to a system or unsafe path`)\n }\n\n // Default: outside explicit paths but not explicitly denied\n log.debug(logFields, `path is outside of explicit safe paths, defaulting to safe`)\n }\n}\n"]}