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debug = require(\"debug\")(\"electron-download\")\nconst envPaths = require(\"env-paths\")\nimport { download } from \"builder-util/out/binDownload\"\nimport { ensureDir, pathExists, rename, unlink } from \"fs-extra-p\"\nimport * as os from \"os\"\nimport * as path from \"path\"\n\nconst ChecksumValidator = require(\"sumchecker\").ChecksumValidator\n\nlet tmpFileCounter = 0\n\nexport type ElectronPlatformName = \"darwin\" | \"linux\" | \"win32\" | \"mas\"\n\nexport interface ElectronDownloadOptions {\n // https://github.com/electron-userland/electron-builder/issues/3077\n // must be optional\n version?: string\n\n /**\n * The [cache location](https://github.com/electron-userland/electron-download#cache-location).\n */\n cache?: string | null\n\n /**\n * The mirror.\n */\n mirror?: string | null\n\n /** @private */\n customDir?: string | null\n /** @private */\n customFilename?: string | null\n\n quiet?: boolean\n\n strictSSL?: boolean\n isVerifyChecksum?: boolean\n\n /** @private */\n force?: boolean\n\n platform?: ElectronPlatformName\n arch?: string\n}\n\n// noinspection SpellCheckingInspection\nconst checksumFilename = \"SHASUMS256.txt\"\n\nclass ElectronDownloader {\n private readonly options: ElectronDownloadOptions\n private cacheDir: string\n\n constructor(options: ElectronDownloadOptions) {\n if (!options.version) {\n throw new Error(\"version not specified\")\n }\n\n // use passed argument or XDG environment variable fallback to OS default\n this.options = {\n platform: os.platform() as ElectronPlatformName,\n arch: os.arch(),\n ...options,\n }\n\n this.options.isVerifyChecksum = this.options.isVerifyChecksum !== false\n this.cacheDir = this.options.cache || process.env.ELECTRON_CACHE || envPaths(\"electron\", {suffix: \"\"}).cache\n }\n\n get baseUrl() {\n return process.env.NPM_CONFIG_ELECTRON_MIRROR ||\n process.env.npm_config_electron_mirror ||\n process.env.ELECTRON_MIRROR ||\n this.options.mirror ||\n \"https://github.com/electron/electron/releases/download/v\"\n }\n\n get middleUrl() {\n return process.env.ELECTRON_CUSTOM_DIR || this.options.customDir || this.options.version\n }\n\n get urlSuffix() {\n return process.env.ELECTRON_CUSTOM_FILENAME || this.options.customFilename || this.filename\n }\n\n private get cachedChecksum() {\n return path.join(this.cacheDir, `${checksumFilename}-${this.options.version}`)\n }\n\n get checksumUrl() {\n return `${this.baseUrl}${this.middleUrl}/${checksumFilename}`\n }\n\n private get filename() {\n const type = `${this.options.platform}-${this.options.arch}`\n const suffix = `v${this.options.version}-${type}`\n return `electron-${suffix}.zip`\n }\n\n private async verifyFile(cachedFile: string, removeIfInvalid: boolean): Promise<boolean> {\n if (!this.options.isVerifyChecksum) {\n return true\n }\n\n debug(\"Verifying file with checksum\")\n if (!await pathExists(this.cachedChecksum)) {\n await this.downloadFile(this.checksumUrl, this.cachedChecksum)\n }\n\n const checker = new ChecksumValidator(\"sha256\", this.cachedChecksum)\n try {\n await checker.validate(path.dirname(cachedFile), path.basename(cachedFile))\n }\n catch (e) {\n if (!removeIfInvalid) {\n throw e\n }\n\n try {\n await unlink(cachedFile)\n }\n catch (ignore) {\n // ignore\n }\n return false\n }\n return true\n }\n\n private async downloadFile(url: string, destination: string) {\n const tempFileName = `tmp-${process.pid}-${(tmpFileCounter++).toString(16)}-${path.basename(destination)}`\n const cacheDir = this.cacheDir\n debug(\"downloading\", url, \"to\", cacheDir)\n const tempFile = path.join(cacheDir, tempFileName)\n await download(url, tempFile)\n\n debug(\"moving\", tempFile, \"from\", cacheDir, \"to\", destination)\n try {\n await rename(tempFile, destination)\n }\n catch (e) {\n try {\n await unlink(tempFile)\n }\n catch (cleanupError) {\n try {\n console.error(`Error deleting cache file: ${cleanupError.message}`)\n }\n catch (ignore) {\n // ignore\n }\n throw e\n }\n }\n }\n\n private get cachedZip() {\n return path.join(this.cacheDir, this.options.customFilename || this.filename)\n }\n\n async downloadIfNotCached(): Promise<string> {\n const url = `${this.baseUrl}${this.middleUrl}/${this.urlSuffix}`\n let cachedFile = this.cachedZip\n debug(\"info\", {cachedFile, url})\n const exists = await pathExists(cachedFile)\n if (exists) {\n debug(\"file exists\", cachedFile)\n if (await this.verifyFile(cachedFile, true)) {\n return cachedFile\n }\n }\n\n debug(\"creating cache dir\")\n try {\n await ensureDir(this.cacheDir)\n }\n catch (e) {\n if (e.code !== \"EACCES\") {\n throw e\n }\n\n // try local folder if homedir is off limits (e.g. some linuxes return '/' as homedir)\n const localCache = path.resolve(\"./.electron\")\n await ensureDir(localCache)\n this.cacheDir = localCache\n cachedFile = this.cachedZip\n }\n\n await this.downloadFile(url, cachedFile)\n await this.verifyFile(cachedFile, false)\n return cachedFile\n }\n}\n\nexport function downloadElectron(options: ElectronDownloadOptions): Promise<string> {\n return new ElectronDownloader(options).downloadIfNotCached()\n}\n"],"sourceRoot":""}
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