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<?php
/*
* This file is part of composer/xdebug-handler.
*
* (c) Composer <https://github.com/composer>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace Composer\XdebugHandler;
/**
* Provides utility functions to prepare a child process command-line and set
* environment variables in that process.
*
* @author John Stevenson <john-stevenson@blueyonder.co.uk>
* @internal
*/
class Process
{
/**
* Returns an array of parameters, including a color option if required
*
* A color option is needed because child process output is piped.
*
* @param array $args The script parameters
* @param string $colorOption The long option to force color output
*
* @return array
*/
public static function addColorOption(array $args, $colorOption)
{
if (!$colorOption
|| in_array($colorOption, $args)
|| !preg_match('/^--([a-z]+$)|(^--[a-z]+=)/', $colorOption, $matches)) {
return $args;
}
if (isset($matches[2])) {
// Handle --color(s)= options
if (false !== ($index = array_search($matches[2].'auto', $args))) {
$args[$index] = $colorOption;
return $args;
} elseif (preg_grep('/^'.$matches[2].'/', $args)) {
return $args;
}
} elseif (in_array('--no-'.$matches[1], $args)) {
return $args;
}
// Check for NO_COLOR variable (https://no-color.org/)
if (false !== getenv('NO_COLOR')) {
return $args;
}
if (false !== ($index = array_search('--', $args))) {
// Position option before double-dash delimiter
array_splice($args, $index, 0, $colorOption);
} else {
$args[] = $colorOption;
}
return $args;
}
/**
* Escapes a string to be used as a shell argument.
*
* From https://github.com/johnstevenson/winbox-args
* MIT Licensed (c) John Stevenson <john-stevenson@blueyonder.co.uk>
*
* @param string $arg The argument to be escaped
* @param bool $meta Additionally escape cmd.exe meta characters
* @param bool $module The argument is the module to invoke
*
* @return string The escaped argument
*/
public static function escape($arg, $meta = true, $module = false)
{
if (!defined('PHP_WINDOWS_VERSION_BUILD')) {
return "'".str_replace("'", "'\\''", $arg)."'";
}
$quote = strpbrk($arg, " \t") !== false || $arg === '';
$arg = preg_replace('/(\\\\*)"/', '$1$1\\"', $arg, -1, $dquotes);
if ($meta) {
$meta = $dquotes || preg_match('/%[^%]+%/', $arg);
if (!$meta) {
$quote = $quote || strpbrk($arg, '^&|<>()') !== false;
} elseif ($module && !$dquotes && $quote) {
$meta = false;
}
}
if ($quote) {
$arg = '"'.preg_replace('/(\\\\*)$/', '$1$1', $arg).'"';
}
if ($meta) {
$arg = preg_replace('/(["^&|<>()%])/', '^$1', $arg);
}
return $arg;
}
/**
* Returns true if the output stream supports colors
*
* This is tricky on Windows, because Cygwin, Msys2 etc emulate pseudo
* terminals via named pipes, so we can only check the environment.
*
* @param mixed $output A valid CLI output stream
*
* @return bool
*/
public static function supportsColor($output)
{
if ('Hyper' === getenv('TERM_PROGRAM')) {
return true;
}
if (defined('PHP_WINDOWS_VERSION_BUILD')) {
return (function_exists('sapi_windows_vt100_support')
&& sapi_windows_vt100_support($output))
|| false !== getenv('ANSICON')
|| 'ON' === getenv('ConEmuANSI')
|| 'xterm' === getenv('TERM');
}
if (function_exists('stream_isatty')) {
return stream_isatty($output);
}
if (function_exists('posix_isatty')) {
return posix_isatty($output);
}
$stat = fstat($output);
// Check if formatted mode is S_IFCHR
return $stat ? 0020000 === ($stat['mode'] & 0170000) : false;
}
/**
* Makes putenv environment changes available in $_SERVER and $_ENV
*
* @param string $name
* @param string|false $value A false value unsets the variable
*
* @return bool Whether the environment variable was set
*/
public static function setEnv($name, $value = false)
{
$unset = false === $value;
if (!putenv($unset ? $name : $name.'='.$value)) {
return false;
}
if ($unset) {
unset($_SERVER[$name]);
} else {
$_SERVER[$name] = $value;
}
// Update $_ENV if it is being used
if (false !== stripos((string) ini_get('variables_order'), 'E')) {
if ($unset) {
unset($_ENV[$name]);
} else {
$_ENV[$name] = $value;
}
}
return true;
}
}
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