{
  "version": 3,
  "sources": ["../../../lib/fs.ts"],
  "sourcesContent": ["/**\r\n * FS\r\n * Pokemon Showdown - http://pokemonshowdown.com/\r\n *\r\n * An abstraction layer around Node's filesystem.\r\n *\r\n * Advantages:\r\n * - write() etc do nothing in unit tests\r\n * - paths are always relative to PS's base directory\r\n * - Promises (seriously wtf Node Core what are you thinking)\r\n * - PS-style API: FS(\"foo.txt\").write(\"bar\") for easier argument order\r\n * - mkdirp\r\n *\r\n * FS is used nearly everywhere, but exceptions include:\r\n * - crashlogger.js - in case the crash is in here\r\n * - repl.js - which use Unix sockets out of this file's scope\r\n * - launch script - happens before modules are loaded\r\n * - sim/ - intended to be self-contained\r\n *\r\n * @author Guangcong Luo <guangcongluo@gmail.com>\r\n * @license MIT\r\n */\r\n\r\nimport * as fs from 'fs';\r\nimport * as pathModule from 'path';\r\nimport {ReadStream, WriteStream} from './streams';\r\n\r\n// not sure why it's necessary to use path.sep, but testing with Windows showed it was\r\nconst DIST = `${pathModule.sep}dist${pathModule.sep}`;\r\n// account for pwd/dist/lib\r\nconst ROOT_PATH = pathModule.resolve(__dirname, __dirname.includes(DIST) ? '..' : '', '..');\r\n\r\ninterface PendingUpdate {\r\n\tisWriting: boolean; // true: waiting on a call to FS.write, false: waiting on a throttle\r\n\tpendingDataFetcher: (() => string | Buffer) | null;\r\n\tpendingOptions: AnyObject | null;\r\n\tthrottleTime: number; // throttling until time (0 for no throttle)\r\n\tthrottleTimer: NodeJS.Timer | null;\r\n}\r\n\r\ndeclare const __fsState: {pendingUpdates: Map<string, PendingUpdate>};\r\n// config needs to be declared here since we access it as global.Config?.nofswriting\r\n// (so we can use it without the global)\r\ndeclare const global: {__fsState: typeof __fsState, Config: any};\r\nif (!global.__fsState) {\r\n\tglobal.__fsState = {\r\n\t\tpendingUpdates: new Map(),\r\n\t};\r\n}\r\n\r\nexport class FSPath {\r\n\tpath: string;\r\n\r\n\tconstructor(path: string) {\r\n\t\tthis.path = pathModule.resolve(ROOT_PATH, path);\r\n\t}\r\n\r\n\tparentDir() {\r\n\t\treturn new FSPath(pathModule.dirname(this.path));\r\n\t}\r\n\r\n\tread(options: AnyObject | BufferEncoding = 'utf8'): Promise<string> {\r\n\t\tif (typeof options !== 'string' && options.encoding === undefined) {\r\n\t\t\toptions.encoding = 'utf8';\r\n\t\t}\r\n\t\treturn new Promise((resolve, reject) => {\r\n\t\t\tfs.readFile(this.path, options, (err, data) => {\r\n\t\t\t\terr ? reject(err) : resolve(data as string);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\treadSync(options: AnyObject | string = 'utf8'): string {\r\n\t\tif (typeof options !== 'string' && options.encoding === undefined) {\r\n\t\t\toptions.encoding = 'utf8';\r\n\t\t}\r\n\t\treturn fs.readFileSync(this.path, options as {encoding: 'utf8'});\r\n\t}\r\n\r\n\treadBuffer(options: AnyObject | BufferEncoding = {}): Promise<Buffer> {\r\n\t\treturn new Promise((resolve, reject) => {\r\n\t\t\tfs.readFile(this.path, options, (err, data) => {\r\n\t\t\t\terr ? reject(err) : resolve(data as Buffer);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\treadBufferSync(options: AnyObject | string = {}) {\r\n\t\treturn fs.readFileSync(this.path, options as {encoding: null});\r\n\t}\r\n\r\n\texists(): Promise<boolean> {\r\n\t\treturn new Promise(resolve => {\r\n\t\t\tfs.exists(this.path, exists => {\r\n\t\t\t\tresolve(exists);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\texistsSync() {\r\n\t\treturn fs.existsSync(this.path);\r\n\t}\r\n\r\n\treadIfExists(): Promise<string> {\r\n\t\treturn new Promise((resolve, reject) => {\r\n\t\t\tfs.readFile(this.path, 'utf8', (err, data) => {\r\n\t\t\t\tif (err && err.code === 'ENOENT') return resolve('');\r\n\t\t\t\terr ? reject(err) : resolve(data);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\treadIfExistsSync() {\r\n\t\ttry {\r\n\t\t\treturn fs.readFileSync(this.path, 'utf8');\r\n\t\t} catch (err: any) {\r\n\t\t\tif (err.code !== 'ENOENT') throw err;\r\n\t\t}\r\n\t\treturn '';\r\n\t}\r\n\r\n\twrite(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.writeFile(this.path, data, options, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\twriteSync(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.writeFileSync(this.path, data, options);\r\n\t}\r\n\r\n\t/**\r\n\t * Writes to a new file before renaming to replace an old file. If\r\n\t * the process crashes while writing, the old file won't be lost.\r\n\t * Does not protect against simultaneous writing; use writeUpdate\r\n\t * for that.\r\n\t */\r\n\tasync safeWrite(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tawait FS(this.path + '.NEW').write(data, options);\r\n\t\tawait FS(this.path + '.NEW').rename(this.path);\r\n\t}\r\n\r\n\tsafeWriteSync(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tFS(this.path + '.NEW').writeSync(data, options);\r\n\t\tFS(this.path + '.NEW').renameSync(this.path);\r\n\t}\r\n\r\n\t/**\r\n\t * Safest way to update a file with in-memory state. Pass a callback\r\n\t * that fetches the data to be written. It will write an update,\r\n\t * avoiding race conditions. The callback may not necessarily be\r\n\t * called, if `writeUpdate` is called many times in a short period.\r\n\t *\r\n\t * `options.throttle`, if it exists, will make sure updates are not\r\n\t * written more than once every `options.throttle` milliseconds.\r\n\t *\r\n\t * No synchronous version because there's no risk of race conditions\r\n\t * with synchronous code; just use `safeWriteSync`.\r\n\t */\r\n\twriteUpdate(dataFetcher: () => string | Buffer, options: AnyObject = {}) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\tconst pendingUpdate: PendingUpdate | undefined = __fsState.pendingUpdates.get(this.path);\r\n\r\n\t\tconst throttleTime = options.throttle ? Date.now() + options.throttle : 0;\r\n\r\n\t\tif (pendingUpdate) {\r\n\t\t\tpendingUpdate.pendingDataFetcher = dataFetcher;\r\n\t\t\tpendingUpdate.pendingOptions = options;\r\n\t\t\tif (pendingUpdate.throttleTimer && throttleTime < pendingUpdate.throttleTime) {\r\n\t\t\t\tpendingUpdate.throttleTime = throttleTime;\r\n\t\t\t\tclearTimeout(pendingUpdate.throttleTimer);\r\n\t\t\t\tpendingUpdate.throttleTimer = setTimeout(() => this.checkNextUpdate(), throttleTime - Date.now());\r\n\t\t\t}\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tif (!throttleTime) {\r\n\t\t\tthis.writeUpdateNow(dataFetcher, options);\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tconst update: PendingUpdate = {\r\n\t\t\tisWriting: false,\r\n\t\t\tpendingDataFetcher: dataFetcher,\r\n\t\t\tpendingOptions: options,\r\n\t\t\tthrottleTime,\r\n\t\t\tthrottleTimer: setTimeout(() => this.checkNextUpdate(), throttleTime - Date.now()),\r\n\t\t};\r\n\t\t__fsState.pendingUpdates.set(this.path, update);\r\n\t}\r\n\r\n\twriteUpdateNow(dataFetcher: () => string | Buffer, options: AnyObject) {\r\n\t\tconst throttleTime = options.throttle ? Date.now() + options.throttle : 0;\r\n\t\tconst update = {\r\n\t\t\tisWriting: true,\r\n\t\t\tpendingDataFetcher: null,\r\n\t\t\tpendingOptions: null,\r\n\t\t\tthrottleTime,\r\n\t\t\tthrottleTimer: null,\r\n\t\t};\r\n\t\t__fsState.pendingUpdates.set(this.path, update);\r\n\t\tvoid this.safeWrite(dataFetcher(), options).then(() => this.finishUpdate());\r\n\t}\r\n\tcheckNextUpdate() {\r\n\t\tconst pendingUpdate = __fsState.pendingUpdates.get(this.path);\r\n\t\tif (!pendingUpdate) throw new Error(`FS: Pending update not found`);\r\n\t\tif (pendingUpdate.isWriting) throw new Error(`FS: Conflicting update`);\r\n\r\n\t\tconst {pendingDataFetcher: dataFetcher, pendingOptions: options} = pendingUpdate;\r\n\t\tif (!dataFetcher || !options) {\r\n\t\t\t// no pending update\r\n\t\t\t__fsState.pendingUpdates.delete(this.path);\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tthis.writeUpdateNow(dataFetcher, options);\r\n\t}\r\n\tfinishUpdate() {\r\n\t\tconst pendingUpdate = __fsState.pendingUpdates.get(this.path);\r\n\t\tif (!pendingUpdate) throw new Error(`FS: Pending update not found`);\r\n\t\tif (!pendingUpdate.isWriting) throw new Error(`FS: Conflicting update`);\r\n\r\n\t\tpendingUpdate.isWriting = false;\r\n\t\tconst throttleTime = pendingUpdate.throttleTime;\r\n\t\tif (!throttleTime || throttleTime < Date.now()) {\r\n\t\t\tthis.checkNextUpdate();\r\n\t\t\treturn;\r\n\t\t}\r\n\r\n\t\tpendingUpdate.throttleTimer = setTimeout(() => this.checkNextUpdate(), throttleTime - Date.now());\r\n\t}\r\n\r\n\tappend(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.appendFile(this.path, data, options, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tappendSync(data: string | Buffer, options: AnyObject = {}) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.appendFileSync(this.path, data, options);\r\n\t}\r\n\r\n\tsymlinkTo(target: string) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.symlink(target, this.path, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tsymlinkToSync(target: string) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.symlinkSync(target, this.path);\r\n\t}\r\n\r\n\tcopyFile(dest: string) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.copyFile(this.path, dest, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\trename(target: string) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.rename(this.path, target, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\trenameSync(target: string) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.renameSync(this.path, target);\r\n\t}\r\n\r\n\treaddir(): Promise<string[]> {\r\n\t\treturn new Promise((resolve, reject) => {\r\n\t\t\tfs.readdir(this.path, (err, data) => {\r\n\t\t\t\terr ? reject(err) : resolve(data);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\treaddirSync() {\r\n\t\treturn fs.readdirSync(this.path);\r\n\t}\r\n\r\n\tasync readdirIfExists(): Promise<string[]> {\r\n\t\tif (await this.exists()) return this.readdir();\r\n\t\treturn Promise.resolve([]);\r\n\t}\r\n\r\n\treaddirIfExistsSync() {\r\n\t\tif (this.existsSync()) return this.readdirSync();\r\n\t\treturn [];\r\n\t}\r\n\r\n\tcreateReadStream() {\r\n\t\treturn new FileReadStream(this.path);\r\n\t}\r\n\r\n\tcreateWriteStream(options = {}): WriteStream {\r\n\t\tif (global.Config?.nofswriting) {\r\n\t\t\t// @ts-ignore\r\n\t\t\treturn new WriteStream({write() {}});\r\n\t\t}\r\n\t\t// @ts-ignore\r\n\t\treturn new WriteStream(fs.createWriteStream(this.path, options));\r\n\t}\r\n\r\n\tcreateAppendStream(options = {}): WriteStream {\r\n\t\tif (global.Config?.nofswriting) {\r\n\t\t\t// @ts-ignore\r\n\t\t\treturn new WriteStream({write() {}});\r\n\t\t}\r\n\t\t// @ts-ignore\r\n\t\toptions.flags = options.flags || 'a';\r\n\t\t// @ts-ignore\r\n\t\treturn new WriteStream(fs.createWriteStream(this.path, options));\r\n\t}\r\n\r\n\tunlinkIfExists() {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.unlink(this.path, err => {\r\n\t\t\t\tif (err && err.code === 'ENOENT') return resolve();\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tunlinkIfExistsSync() {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\ttry {\r\n\t\t\tfs.unlinkSync(this.path);\r\n\t\t} catch (err: any) {\r\n\t\t\tif (err.code !== 'ENOENT') throw err;\r\n\t\t}\r\n\t}\r\n\r\n\tasync rmdir(recursive?: boolean) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.rmdir(this.path, {recursive}, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\trmdirSync(recursive?: boolean) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.rmdirSync(this.path, {recursive});\r\n\t}\r\n\r\n\tmkdir(mode: string | number = 0o755) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.mkdir(this.path, mode, err => {\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tmkdirSync(mode: string | number = 0o755) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\treturn fs.mkdirSync(this.path, mode);\r\n\t}\r\n\r\n\tmkdirIfNonexistent(mode: string | number = 0o755) {\r\n\t\tif (global.Config?.nofswriting) return Promise.resolve();\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tfs.mkdir(this.path, mode, err => {\r\n\t\t\t\tif (err && err.code === 'EEXIST') return resolve();\r\n\t\t\t\terr ? reject(err) : resolve();\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tmkdirIfNonexistentSync(mode: string | number = 0o755) {\r\n\t\tif (global.Config?.nofswriting) return;\r\n\t\ttry {\r\n\t\t\tfs.mkdirSync(this.path, mode);\r\n\t\t} catch (err: any) {\r\n\t\t\tif (err.code !== 'EEXIST') throw err;\r\n\t\t}\r\n\t}\r\n\r\n\t/**\r\n\t * Creates the directory (and any parent directories if necessary).\r\n\t * Does not throw if the directory already exists.\r\n\t */\r\n\tasync mkdirp(mode: string | number = 0o755) {\r\n\t\ttry {\r\n\t\t\tawait this.mkdirIfNonexistent(mode);\r\n\t\t} catch (err: any) {\r\n\t\t\tif (err.code !== 'ENOENT') throw err;\r\n\t\t\tawait this.parentDir().mkdirp(mode);\r\n\t\t\tawait this.mkdirIfNonexistent(mode);\r\n\t\t}\r\n\t}\r\n\r\n\t/**\r\n\t * Creates the directory (and any parent directories if necessary).\r\n\t * Does not throw if the directory already exists. Synchronous.\r\n\t */\r\n\tmkdirpSync(mode: string | number = 0o755) {\r\n\t\ttry {\r\n\t\t\tthis.mkdirIfNonexistentSync(mode);\r\n\t\t} catch (err: any) {\r\n\t\t\tif (err.code !== 'ENOENT') throw err;\r\n\t\t\tthis.parentDir().mkdirpSync(mode);\r\n\t\t\tthis.mkdirIfNonexistentSync(mode);\r\n\t\t}\r\n\t}\r\n\r\n\t/** Calls the callback if the file is modified. */\r\n\tonModify(callback: () => void) {\r\n\t\tfs.watchFile(this.path, (curr, prev) => {\r\n\t\t\tif (curr.mtime > prev.mtime) return callback();\r\n\t\t});\r\n\t}\r\n\r\n\t/** Clears callbacks added with onModify(). */\r\n\tunwatch() {\r\n\t\tfs.unwatchFile(this.path);\r\n\t}\r\n\r\n\tasync isFile() {\r\n\t\treturn new Promise<boolean>((resolve, reject) => {\r\n\t\t\tfs.stat(this.path, (err, stats) => {\r\n\t\t\t\terr ? reject(err) : resolve(stats.isFile());\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tisFileSync() {\r\n\t\treturn fs.statSync(this.path).isFile();\r\n\t}\r\n\r\n\tasync isDirectory() {\r\n\t\treturn new Promise<boolean>((resolve, reject) => {\r\n\t\t\tfs.stat(this.path, (err, stats) => {\r\n\t\t\t\terr ? reject(err) : resolve(stats.isDirectory());\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\tisDirectorySync() {\r\n\t\treturn fs.statSync(this.path).isDirectory();\r\n\t}\r\n\r\n\tasync realpath() {\r\n\t\treturn new Promise<string>((resolve, reject) => {\r\n\t\t\tfs.realpath(this.path, (err, path) => {\r\n\t\t\t\terr ? reject(err) : resolve(path);\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\trealpathSync() {\r\n\t\treturn fs.realpathSync(this.path);\r\n\t}\r\n}\r\n\r\nclass FileReadStream extends ReadStream {\r\n\tfd: Promise<number>;\r\n\r\n\tconstructor(file: string) {\r\n\t\tsuper();\r\n\t\tthis.fd = new Promise((resolve, reject) => {\r\n\t\t\tfs.open(file, 'r', (err, fd) => err ? reject(err) : resolve(fd));\r\n\t\t});\r\n\t\tthis.atEOF = false;\r\n\t}\r\n\r\n\t_read(size = 16384): Promise<void> {\r\n\t\treturn new Promise<void>((resolve, reject) => {\r\n\t\t\tif (this.atEOF) return resolve();\r\n\t\t\tthis.ensureCapacity(size);\r\n\t\t\tvoid this.fd.then(fd => {\r\n\t\t\t\tfs.read(fd, this.buf, this.bufEnd, size, null, (err, bytesRead, buf) => {\r\n\t\t\t\t\tif (err) return reject(err);\r\n\t\t\t\t\tif (!bytesRead) {\r\n\t\t\t\t\t\tthis.atEOF = true;\r\n\t\t\t\t\t\tthis.resolvePush();\r\n\t\t\t\t\t\treturn resolve();\r\n\t\t\t\t\t}\r\n\t\t\t\t\tthis.bufEnd += bytesRead;\r\n\t\t\t\t\t// throw new Error([...this.buf].map(x => x.toString(16)).join(' '));\r\n\t\t\t\t\tthis.resolvePush();\r\n\t\t\t\t\tresolve();\r\n\t\t\t\t});\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n\r\n\t_destroy() {\r\n\t\treturn new Promise<void>(resolve => {\r\n\t\t\tvoid this.fd.then(fd => {\r\n\t\t\t\tfs.close(fd, () => resolve());\r\n\t\t\t});\r\n\t\t});\r\n\t}\r\n}\r\n\r\nfunction getFs(path: string) {\r\n\treturn new FSPath(path);\r\n}\r\n\r\nexport const FS = Object.assign(getFs, {\r\n\tFileReadStream, FSPath, ROOT_PATH,\r\n});\r\n"],
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