			#!/usr/bin/env php
			<?php

			require_once dirname(__FILE__).'/../__init_script__.php';

			$args = new PhutilArgumentParser($argv);
			$args->setTagline('acquire and hold a lockfile');
			$args->setSynopsis(<<<EOHELP
			lock.php __file__ [__options__]
			Acquire a lockfile and hold it until told to unlock it.

			EOHELP
			);

			$args->parseStandardArguments();
			$args->parse(array(
			array(
			'name' => 'test',
			'help' => 'Instead of holding the lock, release it and exit.',
			),
			array(
			'name' => 'hold',
			'help' => 'Hold indefinitely without prompting.',
			),
			array(
			'name' => 'wait',
			'param' => 'n',
			'help' => 'Block for up to __n__ seconds waiting for the lock.',
			'default' => 0,
			),
			array(
			'name' => 'file',
			'wildcard' => true,
			),
			));


			$file = $args->getArg('file');
			if (count($file) !== 1) {
			$args->printHelpAndExit();
			}
			$file = head($file);

			$console = PhutilConsole::getConsole();
			$console->writeOut("This process has PID %d. Acquiring lock...\n", getmypid());

			$lock = PhutilFileLock::newForPath($file);

			try {
			$lock->lock($args->getArg('wait'));
			} catch (PhutilFileLockException $ex) {
			$console->writeOut("UNABLE TO ACQUIRE LOCK: Lock is already held.\n");
			exit(1);
			}

			// NOTE: This string is magic, the unit tests look for it.
			$console->writeOut("LOCK ACQUIRED\n");
			if ($args->getArg('test')) {
			$lock->unlock();
			exit(0);
			}

			if ($args->getArg('hold')) {
			while (true) {
			sleep(1);
			}
			}

			while (!$console->confirm('Release lock?')) {
			// Keep asking until they say yes.
			}

			$console->writeOut("Unlocking...\n");
			$lock->unlock();

			$console->writeOut("Done.\n");
			exit(0);

libphutil/scripts/utils/lock.php
6a24ff75f4faproduction

lock.php
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