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Copy pathserver.ts
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289 lines (252 loc) · 9.17 KB
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/// <reference path="node.d.ts" />
/// <reference path="session.ts" />
// used in fs.writeSync
/* tslint:disable:no-null-keyword */
namespace ts.server {
const readline: NodeJS.ReadLine = require("readline");
const fs: typeof NodeJS.fs = require("fs");
const 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";
const prefix = Logger.padStringRight(type + " " + this.seq.toString(), " ");
if (this.firstInGroup) {
s = prefix + s;
this.firstInGroup = false;
}
if (!this.inGroup) {
this.seq++;
this.firstInGroup = true;
}
const buf = new Buffer(s);
fs.writeSync(this.fd, buf, 0, buf.length, null);
}
}
}
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) => {
const message = input.trim();
this.onMessage(message);
});
rl.on("close", () => {
this.exit();
});
}
}
interface LogOptions {
file?: string;
detailLevel?: string;
}
function parseLoggingEnvironmentString(logEnvStr: string): LogOptions {
const logEnv: LogOptions = {};
const args = logEnvStr.split(" ");
for (let i = 0, len = args.length; i < (len - 1); i += 2) {
const option = args[i];
const 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() {
let fileName: string = undefined;
let detailLevel = "normal";
const logEnvStr = process.env["TSS_LOG"];
if (logEnvStr) {
const 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
// average async stat takes about 30 microseconds
// set chunk size to do 30 files in < 1 millisecond
function createPollingWatchedFileSet(interval = 2500, chunkSize = 30) {
let watchedFiles: WatchedFile[] = [];
let nextFileToCheck = 0;
let watchTimer: any;
function getModifiedTime(fileName: string): Date {
return fs.statSync(fileName).mtime;
}
function poll(checkedIndex: number) {
const watchedFile = watchedFiles[checkedIndex];
if (!watchedFile) {
return;
}
fs.stat(watchedFile.fileName, (err: any, stats: any) => {
if (err) {
watchedFile.callback(watchedFile.fileName);
}
else if (watchedFile.mtime.getTime() !== stats.mtime.getTime()) {
watchedFile.mtime = getModifiedTime(watchedFile.fileName);
watchedFile.callback(watchedFile.fileName, watchedFile.mtime.getTime() === 0);
}
});
}
// this implementation uses polling and
// stat due to inconsistencies of fs.watch
// and efficiency of stat on modern filesystems
function startWatchTimer() {
watchTimer = setInterval(() => {
let count = 0;
let nextToCheck = nextFileToCheck;
let firstCheck = -1;
while ((count < chunkSize) && (nextToCheck !== firstCheck)) {
poll(nextToCheck);
if (firstCheck < 0) {
firstCheck = nextToCheck;
}
nextToCheck++;
if (nextToCheck === watchedFiles.length) {
nextToCheck = 0;
}
count++;
}
nextFileToCheck = nextToCheck;
}, interval);
}
function addFile(fileName: string, callback: FileWatcherCallback): WatchedFile {
const file: WatchedFile = {
fileName,
callback,
mtime: getModifiedTime(fileName)
};
watchedFiles.push(file);
if (watchedFiles.length === 1) {
startWatchTimer();
}
return file;
}
function removeFile(file: WatchedFile) {
watchedFiles = copyListRemovingItem(file, watchedFiles);
}
return {
getModifiedTime: getModifiedTime,
poll: poll,
startWatchTimer: startWatchTimer,
addFile: addFile,
removeFile: removeFile
};
}
// 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?
const pollingWatchedFileSet = createPollingWatchedFileSet();
const logger = createLoggerFromEnv();
const pending: string[] = [];
let canWrite = true;
function writeMessage(s: string) {
if (!canWrite) {
pending.push(s);
}
else {
canWrite = false;
process.stdout.write(new Buffer(s, "utf8"), setCanWriteFlagAndWriteMessageIfNecessary);
}
}
function setCanWriteFlagAndWriteMessageIfNecessary() {
canWrite = true;
if (pending.length) {
writeMessage(pending.shift());
}
}
const sys = <ServerHost>ts.sys;
// Override sys.write because fs.writeSync is not reliable on Node 4
sys.write = (s: string) => writeMessage(s);
sys.watchFile = (fileName, callback) => {
const watchedFile = pollingWatchedFileSet.addFile(fileName, callback);
return {
close: () => pollingWatchedFileSet.removeFile(watchedFile)
};
};
sys.setTimeout = setTimeout;
sys.clearTimeout = clearTimeout;
const ioSession = new IOSession(sys, logger);
process.on("uncaughtException", function(err: Error) {
ioSession.logError(err, "unknown");
});
// Start listening
ioSession.listen();
}
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