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installer
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installer
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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
setupEnvironment();
process(is_array($argv) ? $argv : array());
/**
* Initializes various values
*
* @throws RuntimeException If uopz extension prevents exit calls
*/
function setupEnvironment()
{
ini_set('display_errors', 1);
if (extension_loaded('uopz') && !(ini_get('uopz.disable') || ini_get('uopz.exit'))) {
// uopz works at opcode level and disables exit calls
if (function_exists('uopz_allow_exit')) {
@uopz_allow_exit(true);
} else {
throw new RuntimeException('The uopz extension ignores exit calls and breaks this installer.');
}
}
$installer = 'Composer Installer';
if (defined('PHP_WINDOWS_VERSION_MAJOR')) {
if ($version = getenv('COMPOSERSETUP')) {
$installer = sprintf('Composer-Setup.exe %s', $version);
}
}
define('COMPOSER_INSTALLER', $installer);
}
/**
* Processes the installer
*/
function process($argv)
{
// Determine ANSI output from --ansi and --no-ansi flags
setUseAnsi($argv);
if (in_array('--help', $argv)) {
displayHelp();
exit(0);
}
$check = in_array('--check', $argv);
$help = in_array('--help', $argv);
$force = in_array('--force', $argv);
$quiet = in_array('--quiet', $argv);
$channel = 'stable';
if (in_array('--snapshot', $argv)) {
$channel = 'snapshot';
} elseif (in_array('--preview', $argv)) {
$channel = 'preview';
} elseif (in_array('--1', $argv)) {
$channel = '1';
} elseif (in_array('--2', $argv)) {
$channel = '2';
}
$disableTls = in_array('--disable-tls', $argv);
$installDir = getOptValue('--install-dir', $argv, false);
$version = getOptValue('--version', $argv, false);
$filename = getOptValue('--filename', $argv, 'composer.phar');
$cafile = getOptValue('--cafile', $argv, false);
if (!checkParams($installDir, $version, $cafile)) {
exit(1);
}
$ok = checkPlatform($warnings, $quiet, $disableTls, true);
if ($check) {
// Only show warnings if we haven't output any errors
if ($ok) {
showWarnings($warnings);
showSecurityWarning($disableTls);
}
exit($ok ? 0 : 1);
}
if ($ok || $force) {
$installer = new Installer($quiet, $disableTls, $cafile);
if ($installer->run($version, $installDir, $filename, $channel)) {
showWarnings($warnings);
showSecurityWarning($disableTls);
exit(0);
}
}
exit(1);
}
/**
* Displays the help
*/
function displayHelp()
{
echo <<<EOF
Composer Installer
------------------
Options
--help this help
--check for checking environment only
--force forces the installation
--ansi force ANSI color output
--no-ansi disable ANSI color output
--quiet do not output unimportant messages
--install-dir="..." accepts a target installation directory
--preview install the latest version from the preview (alpha/beta/rc) channel instead of stable
--snapshot install the latest version from the snapshot (dev builds) channel instead of stable
--version="..." accepts a specific version to install instead of the latest
--filename="..." accepts a target filename (default: composer.phar)
--disable-tls disable SSL/TLS security for file downloads
--cafile="..." accepts a path to a Certificate Authority (CA) certificate file for SSL/TLS verification
EOF;
}
/**
* Sets the USE_ANSI define for colorizing output
*
* @param array $argv Command-line arguments
*/
function setUseAnsi($argv)
{
// --no-ansi wins over --ansi
if (in_array('--no-ansi', $argv)) {
define('USE_ANSI', false);
} elseif (in_array('--ansi', $argv)) {
define('USE_ANSI', true);
} else {
// On Windows, default to no ANSI, except in ANSICON and ConEmu.
// Everywhere else, default to ANSI if stdout is a terminal.
define(
'USE_ANSI',
(DIRECTORY_SEPARATOR == '\\')
? (false !== getenv('ANSICON') || 'ON' === getenv('ConEmuANSI'))
: (function_exists('posix_isatty') && posix_isatty(1))
);
}
}
/**
* Returns the value of a command-line option
*
* @param string $opt The command-line option to check
* @param array $argv Command-line arguments
* @param mixed $default Default value to be returned
*
* @return mixed The command-line value or the default
*/
function getOptValue($opt, $argv, $default)
{
$optLength = strlen($opt);
foreach ($argv as $key => $value) {
$next = $key + 1;
if (0 === strpos($value, $opt)) {
if ($optLength === strlen($value) && isset($argv[$next])) {
return trim($argv[$next]);
} else {
return trim(substr($value, $optLength + 1));
}
}
}
return $default;
}
/**
* Checks that user-supplied params are valid
*
* @param mixed $installDir The required istallation directory
* @param mixed $version The required composer version to install
* @param mixed $cafile Certificate Authority file
*
* @return bool True if the supplied params are okay
*/
function checkParams($installDir, $version, $cafile)
{
$result = true;
if (false !== $installDir && !is_dir($installDir)) {
out("The defined install dir ({$installDir}) does not exist.", 'info');
$result = false;
}
if (false !== $version && 1 !== preg_match('/^\d+\.\d+\.\d+(\-(alpha|beta|RC)\d*)*$/', $version)) {
out("The defined install version ({$version}) does not match release pattern.", 'info');
$result = false;
}
if (false !== $cafile && (!file_exists($cafile) || !is_readable($cafile))) {
out("The defined Certificate Authority (CA) cert file ({$cafile}) does not exist or is not readable.", 'info');
$result = false;
}
return $result;
}
/**
* Checks the platform for possible issues running Composer
*
* Errors are written to the output, warnings are saved for later display.
*
* @param array $warnings Populated by method, to be shown later
* @param bool $quiet Quiet mode
* @param bool $disableTls Bypass tls
* @param bool $install If we are installing, rather than diagnosing
*
* @return bool True if there are no errors
*/
function checkPlatform(&$warnings, $quiet, $disableTls, $install)
{
getPlatformIssues($errors, $warnings, $install);
// Make openssl warning an error if tls has not been specifically disabled
if (isset($warnings['openssl']) && !$disableTls) {
$errors['openssl'] = $warnings['openssl'];
unset($warnings['openssl']);
}
if (!empty($errors)) {
out('Some settings on your machine make Composer unable to work properly.', 'error');
out('Make sure that you fix the issues listed below and run this script again:', 'error');
outputIssues($errors);
return false;
}
if (empty($warnings) && !$quiet) {
out('All settings correct for using Composer', 'success');
}
return true;
}
/**
* Checks platform configuration for common incompatibility issues
*
* @param array $errors Populated by method
* @param array $warnings Populated by method
* @param bool $install If we are installing, rather than diagnosing
*
* @return bool If any errors or warnings have been found
*/
function getPlatformIssues(&$errors, &$warnings, $install)
{
$errors = array();
$warnings = array();
if ($iniPath = php_ini_loaded_file()) {
$iniMessage = PHP_EOL.'The php.ini used by your command-line PHP is: ' . $iniPath;
} else {
$iniMessage = PHP_EOL.'A php.ini file does not exist. You will have to create one.';
}
$iniMessage .= PHP_EOL.'If you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.';
if (ini_get('detect_unicode')) {
$errors['unicode'] = array(
'The detect_unicode setting must be disabled.',
'Add the following to the end of your `php.ini`:',
' detect_unicode = Off',
$iniMessage
);
}
if (extension_loaded('suhosin')) {
$suhosin = ini_get('suhosin.executor.include.whitelist');
$suhosinBlacklist = ini_get('suhosin.executor.include.blacklist');
if (false === stripos($suhosin, 'phar') && (!$suhosinBlacklist || false !== stripos($suhosinBlacklist, 'phar'))) {
$errors['suhosin'] = array(
'The suhosin.executor.include.whitelist setting is incorrect.',
'Add the following to the end of your `php.ini` or suhosin.ini (Example path [for Debian]: /etc/php5/cli/conf.d/suhosin.ini):',
' suhosin.executor.include.whitelist = phar '.$suhosin,
$iniMessage
);
}
}
if (!function_exists('json_decode')) {
$errors['json'] = array(
'The json extension is missing.',
'Install it or recompile php without --disable-json'
);
}
if (!extension_loaded('Phar')) {
$errors['phar'] = array(
'The phar extension is missing.',
'Install it or recompile php without --disable-phar'
);
}
if (!extension_loaded('filter')) {
$errors['filter'] = array(
'The filter extension is missing.',
'Install it or recompile php without --disable-filter'
);
}
if (!extension_loaded('hash')) {
$errors['hash'] = array(
'The hash extension is missing.',
'Install it or recompile php without --disable-hash'
);
}
if (!extension_loaded('iconv') && !extension_loaded('mbstring')) {
$errors['iconv_mbstring'] = array(
'The iconv OR mbstring extension is required and both are missing.',
'Install either of them or recompile php without --disable-iconv'
);
}
if (!ini_get('allow_url_fopen')) {
$errors['allow_url_fopen'] = array(
'The allow_url_fopen setting is incorrect.',
'Add the following to the end of your `php.ini`:',
' allow_url_fopen = On',
$iniMessage
);
}
if (extension_loaded('ionCube Loader') && ioncube_loader_iversion() < 40009) {
$ioncube = ioncube_loader_version();
$errors['ioncube'] = array(
'Your ionCube Loader extension ('.$ioncube.') is incompatible with Phar files.',
'Upgrade to ionCube 4.0.9 or higher or remove this line (path may be different) from your `php.ini` to disable it:',
' zend_extension = /usr/lib/php5/20090626+lfs/ioncube_loader_lin_5.3.so',
$iniMessage
);
}
if (version_compare(PHP_VERSION, '5.3.2', '<')) {
$errors['php'] = array(
'Your PHP ('.PHP_VERSION.') is too old, you must upgrade to PHP 5.3.2 or higher.'
);
}
if (version_compare(PHP_VERSION, '5.3.4', '<')) {
$warnings['php'] = array(
'Your PHP ('.PHP_VERSION.') is quite old, upgrading to PHP 5.3.4 or higher is recommended.',
'Composer works with 5.3.2+ for most people, but there might be edge case issues.'
);
}
if (!extension_loaded('openssl')) {
$warnings['openssl'] = array(
'The openssl extension is missing, which means that secure HTTPS transfers are impossible.',
'If possible you should enable it or recompile php with --with-openssl'
);
}
if (extension_loaded('openssl') && OPENSSL_VERSION_NUMBER < 0x1000100f) {
// Attempt to parse version number out, fallback to whole string value.
$opensslVersion = trim(strstr(OPENSSL_VERSION_TEXT, ' '));
$opensslVersion = substr($opensslVersion, 0, strpos($opensslVersion, ' '));
$opensslVersion = $opensslVersion ? $opensslVersion : OPENSSL_VERSION_TEXT;
$warnings['openssl_version'] = array(
'The OpenSSL library ('.$opensslVersion.') used by PHP does not support TLSv1.2 or TLSv1.1.',
'If possible you should upgrade OpenSSL to version 1.0.1 or above.'
);
}
if (!defined('HHVM_VERSION') && !extension_loaded('apcu') && ini_get('apc.enable_cli')) {
$warnings['apc_cli'] = array(
'The apc.enable_cli setting is incorrect.',
'Add the following to the end of your `php.ini`:',
' apc.enable_cli = Off',
$iniMessage
);
}
if (!$install && extension_loaded('xdebug')) {
$warnings['xdebug_loaded'] = array(
'The xdebug extension is loaded, this can slow down Composer a little.',
'Disabling it when using Composer is recommended.'
);
if (ini_get('xdebug.profiler_enabled')) {
$warnings['xdebug_profile'] = array(
'The xdebug.profiler_enabled setting is enabled, this can slow down Composer a lot.',
'Add the following to the end of your `php.ini` to disable it:',
' xdebug.profiler_enabled = 0',
$iniMessage
);
}
}
if (!extension_loaded('zlib')) {
$warnings['zlib'] = array(
'The zlib extension is not loaded, this can slow down Composer a lot.',
'If possible, install it or recompile php with --with-zlib',
$iniMessage
);
}
if (defined('PHP_WINDOWS_VERSION_BUILD')
&& (version_compare(PHP_VERSION, '7.2.23', '<')
|| (version_compare(PHP_VERSION, '7.3.0', '>=')
&& version_compare(PHP_VERSION, '7.3.10', '<')))) {
$warnings['onedrive'] = array(
'The Windows OneDrive folder is not supported on PHP versions below 7.2.23 and 7.3.10.',
'Upgrade your PHP ('.PHP_VERSION.') to use this location with Composer.'
);
}
if (extension_loaded('uopz') && !(ini_get('uopz.disable') || ini_get('uopz.exit'))) {
$warnings['uopz'] = array(
'The uopz extension ignores exit calls and may not work with all Composer commands.',
'Disabling it when using Composer is recommended.'
);
}
ob_start();
phpinfo(INFO_GENERAL);
$phpinfo = ob_get_clean();
if (preg_match('{Configure Command(?: *</td><td class="v">| *=> *)(.*?)(?:</td>|$)}m', $phpinfo, $match)) {
$configure = $match[1];
if (false !== strpos($configure, '--enable-sigchild')) {
$warnings['sigchild'] = array(
'PHP was compiled with --enable-sigchild which can cause issues on some platforms.',
'Recompile it without this flag if possible, see also:',
' https://bugs.php.net/bug.php?id=22999'
);
}
if (false !== strpos($configure, '--with-curlwrappers')) {
$warnings['curlwrappers'] = array(
'PHP was compiled with --with-curlwrappers which will cause issues with HTTP authentication and GitHub.',
'Recompile it without this flag if possible'
);
}
}
// Stringify the message arrays
foreach ($errors as $key => $value) {
$errors[$key] = PHP_EOL.implode(PHP_EOL, $value);
}
foreach ($warnings as $key => $value) {
$warnings[$key] = PHP_EOL.implode(PHP_EOL, $value);
}
return !empty($errors) || !empty($warnings);
}
/**
* Outputs an array of issues
*
* @param array $issues
*/
function outputIssues($issues)
{
foreach ($issues as $issue) {
out($issue, 'info');
}
out('');
}
/**
* Outputs any warnings found
*
* @param array $warnings
*/
function showWarnings($warnings)
{
if (!empty($warnings)) {
out('Some settings on your machine may cause stability issues with Composer.', 'error');
out('If you encounter issues, try to change the following:', 'error');
outputIssues($warnings);
}
}
/**
* Outputs an end of process warning if tls has been bypassed
*
* @param bool $disableTls Bypass tls
*/
function showSecurityWarning($disableTls)
{
if ($disableTls) {
out('You have instructed the Installer not to enforce SSL/TLS security on remote HTTPS requests.', 'info');
out('This will leave all downloads during installation vulnerable to Man-In-The-Middle (MITM) attacks', 'info');
}
}
/**
* colorize output
*/
function out($text, $color = null, $newLine = true)
{
$styles = array(
'success' => "\033[0;32m%s\033[0m",
'error' => "\033[31;31m%s\033[0m",
'info' => "\033[33;33m%s\033[0m"
);
$format = '%s';
if (isset($styles[$color]) && USE_ANSI) {
$format = $styles[$color];
}
if ($newLine) {
$format .= PHP_EOL;
}
printf($format, $text);
}
/**
* Returns the system-dependent Composer home location, which may not exist
*
* @return string
*/
function getHomeDir()
{
$home = getenv('COMPOSER_HOME');
if (!$home) {
$userDir = getUserDir();
if (defined('PHP_WINDOWS_VERSION_MAJOR')) {
$home = $userDir.'/Composer';
} else {
$home = $userDir.'/.composer';
if (!is_dir($home) && useXdg()) {
// XDG Base Directory Specifications
if (!($xdgConfig = getenv('XDG_CONFIG_HOME'))) {
$xdgConfig = $userDir.'/.config';
}
$home = $xdgConfig.'/composer';
}
}
}
return $home;
}
/**
* Returns the location of the user directory from the environment
* @throws RuntimeException If the environment value does not exists
*
* @return string
*/
function getUserDir()
{
$userEnv = defined('PHP_WINDOWS_VERSION_MAJOR') ? 'APPDATA' : 'HOME';
$userDir = getenv($userEnv);
if (!$userDir) {
throw new RuntimeException('The '.$userEnv.' or COMPOSER_HOME environment variable must be set for composer to run correctly');
}
return rtrim(strtr($userDir, '\\', '/'), '/');
}
/**
* @return bool
*/
function useXdg()
{
foreach (array_keys($_SERVER) as $key) {
if (substr($key, 0, 4) === 'XDG_') {
return true;
}
}
return false;
}
function validateCaFile($contents)
{
// assume the CA is valid if php is vulnerable to
// https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html
if (
PHP_VERSION_ID <= 50327
|| (PHP_VERSION_ID >= 50400 && PHP_VERSION_ID < 50422)
|| (PHP_VERSION_ID >= 50500 && PHP_VERSION_ID < 50506)
) {
return !empty($contents);
}
return (bool) openssl_x509_parse($contents);
}
class Installer
{
private $quiet;
private $disableTls;
private $cafile;
private $installPath;
private $target;
private $tmpFile;
private $baseUrl;
private $algo;
private $errHandler;
private $httpClient;
private $pubKeys = array();
private $installs = array();
/**
* Constructor - must not do anything that throws an exception
*
* @param bool $quiet Quiet mode
* @param bool $disableTls Bypass tls
* @param mixed $cafile Path to CA bundle, or false
*/
public function __construct($quiet, $disableTls, $caFile)
{
if (($this->quiet = $quiet)) {
ob_start();
}
$this->disableTls = $disableTls;
$this->cafile = $caFile;
$this->errHandler = new ErrorHandler();
}
/**
* Runs the installer
*
* @param mixed $version Specific version to install, or false
* @param mixed $installDir Specific installation directory, or false
* @param string $filename Specific filename to save to, or composer.phar
* @param string $channel Specific version channel to use
* @throws Exception If anything other than a RuntimeException is caught
*
* @return bool If the installation succeeded
*/
public function run($version, $installDir, $filename, $channel)
{
try {
$this->initTargets($installDir, $filename);
$this->initTls();
$this->httpClient = new HttpClient($this->disableTls, $this->cafile);
$result = $this->install($version, $channel);
// in case --1 or --2 is passed, we leave the default channel for next self-update to stable
if (is_numeric($channel)) {
$channel = 'stable';
}
if ($result && $channel !== 'stable' && !$version && defined('PHP_BINARY')) {
$null = (defined('PHP_WINDOWS_VERSION_MAJOR') ? 'NUL' : '/dev/null');
@exec(escapeshellarg(PHP_BINARY) .' '.escapeshellarg($this->target).' self-update --'.$channel.' --set-channel-only -q > '.$null.' 2> '.$null, $output);
}
} catch (Exception $e) {
$result = false;
}
// Always clean up
$this->cleanUp($result);
if (isset($e)) {
// Rethrow anything that is not a RuntimeException
if (!$e instanceof RuntimeException) {
throw $e;
}
out($e->getMessage(), 'error');
}
return $result;
}
/**
* Initialization methods to set the required filenames and composer url
*
* @param mixed $installDir Specific installation directory, or false
* @param string $filename Specific filename to save to, or composer.phar
* @throws RuntimeException If the installation directory is not writable
*/
protected function initTargets($installDir, $filename)
{
$this->installPath = (is_dir($installDir) ? rtrim($installDir, '/').'/' : '').$filename;
$installDir = realpath($installDir) ? realpath($installDir) : getcwd();
if (!is_writeable($installDir)) {
throw new RuntimeException('The installation directory "'.$installDir.'" is not writable');
}
$this->target = $installDir.DIRECTORY_SEPARATOR.$filename;
$this->tmpFile = $installDir.DIRECTORY_SEPARATOR.basename($this->target, '.phar').'-temp.phar';
$uriScheme = $this->disableTls ? 'http' : 'https';
$this->baseUrl = $uriScheme.'://getcomposer.org';
}
/**
* A wrapper around methods to check tls and write public keys
* @throws RuntimeException If SHA384 is not supported
*/
protected function initTls()
{
if ($this->disableTls) {
return;
}
if (!in_array('sha384', array_map('strtolower', openssl_get_md_methods()))) {
throw new RuntimeException('SHA384 is not supported by your openssl extension');
}
$this->algo = defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'SHA384';
$home = $this->getComposerHome();
$this->pubKeys = array(
'dev' => $this->installKey(self::getPKDev(), $home, 'keys.dev.pub'),
'tags' => $this->installKey(self::getPKTags(), $home, 'keys.tags.pub')
);
if (empty($this->cafile) && !HttpClient::getSystemCaRootBundlePath()) {
$this->cafile = $this->installKey(HttpClient::getPackagedCaFile(), $home, 'cacert.pem');
}
}
/**
* Returns the Composer home directory, creating it if required
* @throws RuntimeException If the directory cannot be created
*
* @return string
*/
protected function getComposerHome()
{
$home = getHomeDir();
if (!is_dir($home)) {
$this->errHandler->start();
if (!mkdir($home, 0777, true)) {
throw new RuntimeException(sprintf(
'Unable to create Composer home directory "%s": %s',
$home,
$this->errHandler->message
));
}
$this->installs[] = $home;
$this->errHandler->stop();
}
return $home;
}
/**
* Writes public key data to disc
*
* @param string $data The public key(s) in pem format
* @param string $path The directory to write to
* @param string $filename The name of the file
* @throws RuntimeException If the file cannot be written
*
* @return string The path to the saved data
*/
protected function installKey($data, $path, $filename)
{
$this->errHandler->start();
$target = $path.DIRECTORY_SEPARATOR.$filename;
$installed = file_exists($target);
$write = file_put_contents($target, $data, LOCK_EX);
@chmod($target, 0644);
$this->errHandler->stop();
if (!$write) {
throw new RuntimeException(sprintf('Unable to write %s to: %s', $filename, $path));
}
if (!$installed) {
$this->installs[] = $target;
}
return $target;
}
/**
* The main install function
*
* @param mixed $version Specific version to install, or false
* @param string $channel Version channel to use
*
* @return bool If the installation succeeded
*/
protected function install($version, $channel)
{
$retries = 3;
$result = false;
$infoMsg = 'Downloading...';
$infoType = 'info';
while ($retries--) {
if (!$this->quiet) {
out($infoMsg, $infoType);
$infoMsg = 'Retrying...';
$infoType = 'error';
}
if (!$this->getVersion($channel, $version, $url, $error)) {
out($error, 'error');
continue;
}
if (!$this->downloadToTmp($url, $signature, $error)) {
out($error, 'error');
continue;
}
if (!$this->verifyAndSave($version, $signature, $error)) {
out($error, 'error');
continue;
}
$result = true;
break;
}
if (!$this->quiet) {
if ($result) {
out(PHP_EOL."Composer (version {$version}) successfully installed to: {$this->target}", 'success');
out("Use it: php {$this->installPath}", 'info');
out('');
} else {
out('The download failed repeatedly, aborting.', 'error');
}
}
return $result;
}
/**
* Sets the version url, downloading version data if required
*
* @param string $channel Version channel to use
* @param false|string $version Version to install, or set by method
* @param null|string $url The versioned url, set by method
* @param null|string $error Set by method on failure
*
* @return bool If the operation succeeded
*/
protected function getVersion($channel, &$version, &$url, &$error)
{
$error = '';
if ($version) {
if (empty($url)) {
$url = $this->baseUrl."/download/{$version}/composer.phar";
}
return true;
}
$this->errHandler->start();
if ($this->downloadVersionData($data, $error)) {
$this->parseVersionData($data, $channel, $version, $url);
}
$this->errHandler->stop();
return empty($error);
}
/**
* Downloads and json-decodes version data
*
* @param null|array $data Downloaded version data, set by method
* @param null|string $error Set by method on failure
*
* @return bool If the operation succeeded
*/
protected function downloadVersionData(&$data, &$error)
{
$url = $this->baseUrl.'/versions';
$errFmt = 'The "%s" file could not be %s: %s';
if (!$json = $this->httpClient->get($url)) {
$error = sprintf($errFmt, $url, 'downloaded', $this->errHandler->message);
return false;
}
if (!$data = json_decode($json, true)) {
$error = sprintf($errFmt, $url, 'json-decoded', $this->getJsonError());
return false;
}
return true;
}
/**
* A wrapper around the methods needed to download and save the phar
*
* @param string $url The versioned download url
* @param null|string $signature Set by method on successful download
* @param null|string $error Set by method on failure
*
* @return bool If the operation succeeded
*/
protected function downloadToTmp($url, &$signature, &$error)
{
$error = '';
$errFmt = 'The "%s" file could not be downloaded: %s';
$sigUrl = $url.'.sig';
$this->errHandler->start();
if (!$fh = fopen($this->tmpFile, 'w')) {
$error = sprintf('Could not create file "%s": %s', $this->tmpFile, $this->errHandler->message);
} elseif (!$this->getSignature($sigUrl, $signature)) {
$error = sprintf($errFmt, $sigUrl, $this->errHandler->message);
} elseif (!fwrite($fh, $this->httpClient->get($url))) {
$error = sprintf($errFmt, $url, $this->errHandler->message);
}
if (is_resource($fh)) {
fclose($fh);
}
$this->errHandler->stop();
return empty($error);
}
/**
* Verifies the downloaded file and saves it to the target location
*
* @param string $version The composer version downloaded
* @param string $signature The digital signature to check
* @param null|string $error Set by method on failure
*
* @return bool If the operation succeeded
*/
protected function verifyAndSave($version, $signature, &$error)
{
$error = '';
if (!$this->validatePhar($this->tmpFile, $pharError)) {
$error = 'The download is corrupt: '.$pharError;
} elseif (!$this->verifySignature($version, $signature, $this->tmpFile)) {
$error = 'Signature mismatch, could not verify the phar file integrity';
} else {
$this->errHandler->start();
if (!rename($this->tmpFile, $this->target)) {
$error = sprintf('Could not write to file "%s": %s', $this->target, $this->errHandler->message);
}
chmod($this->target, 0755);
$this->errHandler->stop();
}
return empty($error);
}
/**
* Parses an array of version data to match the required channel
*
* @param array $data Downloaded version data
* @param mixed $channel Version channel to use
* @param false|string $version Set by method
* @param mixed $url The versioned url, set by method
*/
protected function parseVersionData(array $data, $channel, &$version, &$url)
{
foreach ($data[$channel] as $candidate) {
if ($candidate['min-php'] <= PHP_VERSION_ID) {
$version = $candidate['version'];
$url = $this->baseUrl.$candidate['path'];
break;
}
}
if (!$version) {
$error = sprintf(
'None of the %d %s version(s) of Composer matches your PHP version (%s / ID: %d)',
count($data[$channel]),
$channel,
PHP_VERSION,
PHP_VERSION_ID
);
throw new RuntimeException($error);
}
}
/**
* Downloads the digital signature of required phar file
*
* @param string $url The signature url
* @param null|string $signature Set by method on success
*
* @return bool If the download succeeded
*/
protected function getSignature($url, &$signature)
{
if (!$result = $this->disableTls) {
$signature = $this->httpClient->get($url);