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Copy pathserver.ts
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274 lines (239 loc) · 8.81 KB
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/// <reference path="node.d.ts" />
/// <reference path="session.ts" />
namespace ts.server {
var nodeproto: typeof NodeJS._debugger = require('_debugger');
var readline: NodeJS.ReadLine = require('readline');
var path: NodeJS.Path = require('path');
var fs: typeof NodeJS.fs = require('fs');
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
terminal: false,
});
class Logger implements ts.server.Logger {
fd = -1;
seq = 0;
inGroup = false;
firstInGroup = true;
constructor(public logFilename: string, public level: string) {
}
static padStringRight(str: string, padding: string) {
return (str + padding).slice(0, padding.length);
}
close() {
if (this.fd >= 0) {
fs.close(this.fd);
}
}
perftrc(s: string) {
this.msg(s, "Perf");
}
info(s: string) {
this.msg(s, "Info");
}
startGroup() {
this.inGroup = true;
this.firstInGroup = true;
}
endGroup() {
this.inGroup = false;
this.seq++;
this.firstInGroup = true;
}
loggingEnabled() {
return !!this.logFilename;
}
isVerbose() {
return this.loggingEnabled() && (this.level == "verbose");
}
msg(s: string, type = "Err") {
if (this.fd < 0) {
if (this.logFilename) {
this.fd = fs.openSync(this.logFilename, "w");
}
}
if (this.fd >= 0) {
s = s + "\n";
var prefix = Logger.padStringRight(type + " " + this.seq.toString(), " ");
if (this.firstInGroup) {
s = prefix + s;
this.firstInGroup = false;
}
if (!this.inGroup) {
this.seq++;
this.firstInGroup = true;
}
var buf = new Buffer(s);
fs.writeSync(this.fd, buf, 0, buf.length, null);
}
}
}
interface WatchedFile {
fileName: string;
callback: (fileName: string) => void;
mtime: Date;
}
class WatchedFileSet {
private watchedFiles: WatchedFile[] = [];
private nextFileToCheck = 0;
private watchTimer: NodeJS.Timer;
// average async stat takes about 30 microseconds
// set chunk size to do 30 files in < 1 millisecond
constructor(public interval = 2500, public chunkSize = 30) {
}
private static copyListRemovingItem<T>(item: T, list: T[]) {
var copiedList: T[] = [];
for (var i = 0, len = list.length; i < len; i++) {
if (list[i] != item) {
copiedList.push(list[i]);
}
}
return copiedList;
}
private static getModifiedTime(fileName: string): Date {
return fs.statSync(fileName).mtime;
}
private poll(checkedIndex: number) {
var watchedFile = this.watchedFiles[checkedIndex];
if (!watchedFile) {
return;
}
fs.stat(watchedFile.fileName,(err, stats) => {
if (err) {
watchedFile.callback(watchedFile.fileName);
}
else if (watchedFile.mtime.getTime() !== stats.mtime.getTime()) {
watchedFile.mtime = WatchedFileSet.getModifiedTime(watchedFile.fileName);
watchedFile.callback(watchedFile.fileName);
}
});
}
// this implementation uses polling and
// stat due to inconsistencies of fs.watch
// and efficiency of stat on modern filesystems
private startWatchTimer() {
this.watchTimer = setInterval(() => {
var count = 0;
var nextToCheck = this.nextFileToCheck;
var firstCheck = -1;
while ((count < this.chunkSize) && (nextToCheck !== firstCheck)) {
this.poll(nextToCheck);
if (firstCheck < 0) {
firstCheck = nextToCheck;
}
nextToCheck++;
if (nextToCheck === this.watchedFiles.length) {
nextToCheck = 0;
}
count++;
}
this.nextFileToCheck = nextToCheck;
}, this.interval);
}
addFile(fileName: string, callback: (fileName: string) => void ): WatchedFile {
var file: WatchedFile = {
fileName,
callback,
mtime: WatchedFileSet.getModifiedTime(fileName)
};
this.watchedFiles.push(file);
if (this.watchedFiles.length === 1) {
this.startWatchTimer();
}
return file;
}
removeFile(file: WatchedFile) {
this.watchedFiles = WatchedFileSet.copyListRemovingItem(file, this.watchedFiles);
}
}
class IOSession extends Session {
constructor(host: ServerHost, logger: ts.server.Logger) {
super(host, Buffer.byteLength, process.hrtime, logger);
}
exit() {
this.projectService.log("Exiting...","Info");
this.projectService.closeLog();
process.exit(0);
}
listen() {
rl.on('line',(input: string) => {
var message = input.trim();
this.onMessage(message);
});
rl.on('close',() => {
this.exit();
});
}
}
interface LogOptions {
file?: string;
detailLevel?: string;
}
function parseLoggingEnvironmentString(logEnvStr: string): LogOptions {
var logEnv: LogOptions = {};
var args = logEnvStr.split(' ');
for (var i = 0, len = args.length; i < (len - 1); i += 2) {
var option = args[i];
var value = args[i + 1];
if (option && value) {
switch (option) {
case "-file":
logEnv.file = value;
break;
case "-level":
logEnv.detailLevel = value;
break;
}
}
}
return logEnv;
}
// TSS_LOG "{ level: "normal | verbose | terse", file?: string}"
function createLoggerFromEnv() {
var fileName: string = undefined;
var detailLevel = "normal";
var logEnvStr = process.env["TSS_LOG"];
if (logEnvStr) {
var logEnv = parseLoggingEnvironmentString(logEnvStr);
if (logEnv.file) {
fileName = logEnv.file;
}
else {
fileName = __dirname + "/.log" + process.pid.toString();
}
if (logEnv.detailLevel) {
detailLevel = logEnv.detailLevel;
}
}
return new Logger(fileName, detailLevel);
}
// This places log file in the directory containing editorServices.js
// TODO: check that this location is writable
var logger = createLoggerFromEnv();
// REVIEW: for now this implementation uses polling.
// The advantage of polling is that it works reliably
// on all os and with network mounted files.
// For 90 referenced files, the average time to detect
// changes is 2*msInterval (by default 5 seconds).
// The overhead of this is .04 percent (1/2500) with
// average pause of < 1 millisecond (and max
// pause less than 1.5 milliseconds); question is
// do we anticipate reference sets in the 100s and
// do we care about waiting 10-20 seconds to detect
// changes for large reference sets? If so, do we want
// to increase the chunk size or decrease the interval
// time dynamically to match the large reference set?
var watchedFileSet = new WatchedFileSet();
ts.sys.watchFile = function (fileName, callback) {
var watchedFile = watchedFileSet.addFile(fileName, callback);
return {
close: () => watchedFileSet.removeFile(watchedFile)
}
};
var ioSession = new IOSession(ts.sys, logger);
process.on('uncaughtException', function(err: Error) {
ioSession.logError(err, "unknown");
});
// Start listening
ioSession.listen();
}