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

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

	$target = 'resources/php_compat_info.json';
	echo phutil_console_format(
	"%s\n",
	pht(
	'Purpose: Updates %s used by %s.',
	$target,
	'ArcanistXHPASTLinter'));

	// PHP CompatInfo is installed via Composer.
	//
	// You should symlink the Composer vendor directory to
	// libphutil/externals/includes/vendor`.
	require_once 'vendor/autoload.php';

	$output = array();
	$output['@'.'generated'] = true;
	$output['params'] = array();
	$output['functions'] = array();
	$output['classes'] = array();
	$output['interfaces'] = array();
	$output['constants'] = array();

	/**
	* Transform compatibility info into a slightly different format.
	*
	* The data returned by PHP CompatInfo is slightly odd in that null data is
	* represented by an empty string.
	*
	* @param map<string, string>
	* @return map<string, string \| null>
	*/
	function parse_compat_info(array $compat) {
	return array(
	'ext.name' => $compat['ext.name'],
	'ext.min' => nonempty($compat['ext.min'], null),
	'ext.max' => nonempty($compat['ext.max'], null),
	'php.min' => nonempty($compat['php.min'], null),
	'php.max' => nonempty($compat['php.max'], null),
	);
	}

	$client = new \Bartlett\Reflect\Client();
	$api = $client->api('reference');

	foreach ($api->dir() as $extension) {
	$result = $api->show(
	$extension->name,
	false,
	false,
	false,
	true,
	true,
	true,
	true,
	true);

	foreach ($result['constants'] as $constant => $compat) {
	$output['constants'][$constant] = parse_compat_info($compat);
	}

	foreach ($result['functions'] as $function => $compat) {
	$output['functions'][$function] = parse_compat_info($compat);

	if (idx($compat, 'parameters')) {
	$output['params'][$function] = explode(', ', $compat['parameters']);
	}
	}

	foreach ($result['classes'] as $class => $compat) {
	$output['classes'][$class] = parse_compat_info($compat);
	}

	foreach ($result['interfaces'] as $interface => $compat) {
	$output['interfaces'][$interface] = parse_compat_info($compat);
	}

	foreach ($result['methods'] as $class => $methods) {
	$output['methods'][$class] = array();

	foreach ($methods as $method => $compat) {
	$output['methods'][$class][$method] = parse_compat_info($compat);
	}
	}

	foreach ($result['static methods'] as $class => $methods) {
	$output['static_methods'][$class] = array();

	foreach ($methods as $method => $compat) {
	$output['static_methods'][$class][$method] = parse_compat_info($compat);
	}
	}
	}

	ksort($output['params']);
	ksort($output['functions']);
	ksort($output['classes']);
	ksort($output['interfaces']);
	ksort($output['constants']);

	// Grepped from PHP Manual.
	// TODO: Can we get this from PHP CompatInfo?
	// See https://github.com/llaville/php-compat-info/issues/185.
	$output['functions_windows'] = array(
	'apache_child_terminate' => false,
	'chroot' => false,
	'getrusage' => false,
	'imagecreatefromxpm' => false,
	'lchgrp' => false,
	'lchown' => false,
	'nl_langinfo' => false,
	'strptime' => false,
	'sys_getloadavg' => false,
	'checkdnsrr' => '5.3.0',
	'dns_get_record' => '5.3.0',
	'fnmatch' => '5.3.0',
	'getmxrr' => '5.3.0',
	'getopt' => '5.3.0',
	'imagecolorclosesthwb' => '5.3.0',
	'inet_ntop' => '5.3.0',
	'inet_pton' => '5.3.0',
	'link' => '5.3.0',
	'linkinfo' => '5.3.0',
	'readlink' => '5.3.0',
	'socket_create_pair' => '5.3.0',
	'stream_socket_pair' => '5.3.0',
	'symlink' => '5.3.0',
	'time_nanosleep' => '5.3.0',
	'time_sleep_until' => '5.3.0',
	);

	Filesystem::writeFile(
	phutil_get_library_root('phutil').'/../'.$target,
	id(new PhutilJSON())->encodeFormatted($output));

	echo pht('Done.')."\n";

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