code-server/build/lib/watch/watch-win32.ts

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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as path from 'path';
import * as cp from 'child_process';
import * as fs from 'fs';
import * as File from 'vinyl';
import * as es from 'event-stream';
import * as filter from 'gulp-filter';
import { Stream } from 'stream';
const watcherPath = path.join(__dirname, 'watcher.exe');
function toChangeType(type: '0' | '1' | '2'): 'change' | 'add' | 'unlink' {
switch (type) {
case '0': return 'change';
case '1': return 'add';
default: return 'unlink';
}
}
function watch(root: string): Stream {
const result = es.through();
let child: cp.ChildProcess | null = cp.spawn(watcherPath, [root]);
child.stdout.on('data', function (data) {
const lines: string[] = data.toString('utf8').split('\n');
for (let i = 0; i < lines.length; i++) {
const line = lines[i].trim();
if (line.length === 0) {
continue;
}
const changeType = <'0' | '1' | '2'>line[0];
const changePath = line.substr(2);
// filter as early as possible
if (/^\.git/.test(changePath) || /(^|\\)out($|\\)/.test(changePath)) {
continue;
}
const changePathFull = path.join(root, changePath);
const file = new File({
path: changePathFull,
base: root
});
(<any>file).event = toChangeType(changeType);
result.emit('data', file);
}
});
child.stderr.on('data', function (data) {
result.emit('error', data);
});
child.on('exit', function (code) {
result.emit('error', 'Watcher died with code ' + code);
child = null;
});
process.once('SIGTERM', function () { process.exit(0); });
process.once('SIGTERM', function () { process.exit(0); });
process.once('exit', function () { if (child) { child.kill(); } });
return result;
}
const cache: { [cwd: string]: Stream; } = Object.create(null);
module.exports = function (pattern: string | string[] | filter.FileFunction, options?: { cwd?: string; base?: string; }) {
options = options || {};
const cwd = path.normalize(options.cwd || process.cwd());
let watcher = cache[cwd];
if (!watcher) {
watcher = cache[cwd] = watch(cwd);
}
const rebase = !options.base ? es.through() : es.mapSync(function (f: File) {
f.base = options!.base!;
return f;
});
return watcher
.pipe(filter(['**', '!.git{,/**}'])) // ignore all things git
.pipe(filter(pattern))
.pipe(es.map(function (file: File, cb) {
fs.stat(file.path, function (err, stat) {
if (err && err.code === 'ENOENT') { return cb(undefined, file); }
if (err) { return cb(); }
if (!stat.isFile()) { return cb(); }
fs.readFile(file.path, function (err, contents) {
if (err && err.code === 'ENOENT') { return cb(undefined, file); }
if (err) { return cb(); }
file.contents = contents;
file.stat = stat;
cb(undefined, file);
});
});
}))
.pipe(rebase);
};