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sys.ts
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/// <reference path="core.ts"/>
namespace ts {
export interface System {
args: string[];
newLine: string;
useCaseSensitiveFileNames: boolean;
write(s: string): void;
readFile(path: string, encoding?: string): string;
writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
watchFile?(path: string, callback: (path: string) => void): FileWatcher;
resolvePath(path: string): string;
fileExists(path: string): boolean;
directoryExists(path: string): boolean;
createDirectory(path: string): void;
getExecutingFilePath(): string;
getCurrentDirectory(): string;
readDirectory(path: string, extension?: string, exclude?: string[]): string[];
getMemoryUsage?(): number;
exit(exitCode?: number): void;
}
export interface FileWatcher {
close(): void;
}
declare var require: any;
declare var module: any;
declare var process: any;
declare var global: any;
declare var __filename: string;
declare var Buffer: {
new (str: string, encoding?: string): any;
};
declare class Enumerator {
public atEnd(): boolean;
public moveNext(): boolean;
public item(): any;
constructor(o: any);
}
export var sys: System = (function () {
function getWScriptSystem(): System {
let fso = new ActiveXObject("Scripting.FileSystemObject");
let fileStream = new ActiveXObject("ADODB.Stream");
fileStream.Type = 2 /*text*/;
let binaryStream = new ActiveXObject("ADODB.Stream");
binaryStream.Type = 1 /*binary*/;
let args: string[] = [];
for (let i = 0; i < WScript.Arguments.length; i++) {
args[i] = WScript.Arguments.Item(i);
}
function readFile(fileName: string, encoding?: string): string {
if (!fso.FileExists(fileName)) {
return undefined;
}
fileStream.Open();
try {
if (encoding) {
fileStream.Charset = encoding;
fileStream.LoadFromFile(fileName);
}
else {
// Load file and read the first two bytes into a string with no interpretation
fileStream.Charset = "x-ansi";
fileStream.LoadFromFile(fileName);
let bom = fileStream.ReadText(2) || "";
// Position must be at 0 before encoding can be changed
fileStream.Position = 0;
// [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
}
// ReadText method always strips byte order mark from resulting string
return fileStream.ReadText();
}
catch (e) {
throw e;
}
finally {
fileStream.Close();
}
}
function writeFile(fileName: string, data: string, writeByteOrderMark?: boolean): void {
fileStream.Open();
binaryStream.Open();
try {
// Write characters in UTF-8 encoding
fileStream.Charset = "utf-8";
fileStream.WriteText(data);
// If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
// If not, start from position 0, as the BOM will be added automatically when charset==utf8.
if (writeByteOrderMark) {
fileStream.Position = 0;
}
else {
fileStream.Position = 3;
}
fileStream.CopyTo(binaryStream);
binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
}
finally {
binaryStream.Close();
fileStream.Close();
}
}
function getCanonicalPath(path: string): string {
return path.toLowerCase();
}
function getNames(collection: any): string[]{
let result: string[] = [];
for (let e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
result.push(e.item().Name);
}
return result.sort();
}
function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
let result: string[] = [];
exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
visitDirectory(path);
return result;
function visitDirectory(path: string) {
let folder = fso.GetFolder(path || ".");
let files = getNames(folder.files);
for (let current of files) {
let name = combinePaths(path, current);
if ((!extension || fileExtensionIs(name, extension)) && !contains(exclude, getCanonicalPath(name))) {
result.push(name);
}
}
let subfolders = getNames(folder.subfolders);
for (let current of subfolders) {
let name = combinePaths(path, current);
if (!contains(exclude, getCanonicalPath(name))) {
visitDirectory(name);
}
}
}
}
return {
args,
newLine: "\r\n",
useCaseSensitiveFileNames: false,
write(s: string): void {
WScript.StdOut.Write(s);
},
readFile,
writeFile,
resolvePath(path: string): string {
return fso.GetAbsolutePathName(path);
},
fileExists(path: string): boolean {
return fso.FileExists(path);
},
directoryExists(path: string) {
return fso.FolderExists(path);
},
createDirectory(directoryName: string) {
if (!this.directoryExists(directoryName)) {
fso.CreateFolder(directoryName);
}
},
getExecutingFilePath() {
return WScript.ScriptFullName;
},
getCurrentDirectory() {
return new ActiveXObject("WScript.Shell").CurrentDirectory;
},
readDirectory,
exit(exitCode?: number): void {
try {
WScript.Quit(exitCode);
}
catch (e) {
}
}
};
}
function getNodeSystem(): System {
const _fs = require("fs");
const _path = require("path");
const _os = require("os");
const platform: string = _os.platform();
// win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
const useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
function readFile(fileName: string, encoding?: string): string {
if (!_fs.existsSync(fileName)) {
return undefined;
}
let buffer = _fs.readFileSync(fileName);
let len = buffer.length;
if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
// Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
// flip all byte pairs and treat as little endian.
len &= ~1;
for (let i = 0; i < len; i += 2) {
let temp = buffer[i];
buffer[i] = buffer[i + 1];
buffer[i + 1] = temp;
}
return buffer.toString("utf16le", 2);
}
if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
// Little endian UTF-16 byte order mark detected
return buffer.toString("utf16le", 2);
}
if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
// UTF-8 byte order mark detected
return buffer.toString("utf8", 3);
}
// Default is UTF-8 with no byte order mark
return buffer.toString("utf8");
}
function writeFile(fileName: string, data: string, writeByteOrderMark?: boolean): void {
// If a BOM is required, emit one
if (writeByteOrderMark) {
data = "\uFEFF" + data;
}
_fs.writeFileSync(fileName, data, "utf8");
}
function getCanonicalPath(path: string): string {
return useCaseSensitiveFileNames ? path.toLowerCase() : path;
}
function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
let result: string[] = [];
exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
visitDirectory(path);
return result;
function visitDirectory(path: string) {
let files = _fs.readdirSync(path || ".").sort();
let directories: string[] = [];
for (let current of files) {
let name = combinePaths(path, current);
if (!contains(exclude, getCanonicalPath(name))) {
let stat = _fs.statSync(name);
if (stat.isFile()) {
if (!extension || fileExtensionIs(name, extension)) {
result.push(name);
}
}
else if (stat.isDirectory()) {
directories.push(name);
}
}
}
for (let current of directories) {
visitDirectory(current);
}
}
}
return {
args: process.argv.slice(2),
newLine: _os.EOL,
useCaseSensitiveFileNames: useCaseSensitiveFileNames,
write(s: string): void {
const buffer = new Buffer(s, "utf8");
let offset: number = 0;
let toWrite: number = buffer.length;
let written = 0;
// 1 is a standard descriptor for stdout
while ((written = _fs.writeSync(1, buffer, offset, toWrite)) < toWrite) {
offset += written;
toWrite -= written;
}
},
readFile,
writeFile,
watchFile: (fileName, callback) => {
// watchFile polls a file every 250ms, picking up file notifications.
_fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
return {
close() { _fs.unwatchFile(fileName, fileChanged); }
};
function fileChanged(curr: any, prev: any) {
if (+curr.mtime <= +prev.mtime) {
return;
}
callback(fileName);
}
},
resolvePath: function (path: string): string {
return _path.resolve(path);
},
fileExists(path: string): boolean {
return _fs.existsSync(path);
},
directoryExists(path: string) {
return _fs.existsSync(path) && _fs.statSync(path).isDirectory();
},
createDirectory(directoryName: string) {
if (!this.directoryExists(directoryName)) {
_fs.mkdirSync(directoryName);
}
},
getExecutingFilePath() {
return __filename;
},
getCurrentDirectory() {
return process.cwd();
},
readDirectory,
getMemoryUsage() {
if (global.gc) {
global.gc();
}
return process.memoryUsage().heapUsed;
},
exit(exitCode?: number): void {
process.exit(exitCode);
}
};
}
if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
return getWScriptSystem();
}
else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
// process and process.nextTick checks if current environment is node-like
// process.browser check excludes webpack and browserify
return getNodeSystem();
}
else {
return undefined; // Unsupported host
}
})();
}