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<?php |
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namespace Consolidation\SiteProcess\Util; |
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use Consolidation\SiteAlias\SiteAliasInterface; |
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use Symfony\Component\Process\Process; |
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use Consolidation\Config\Util\Interpolator; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Consolidation\SiteProcess\Util\ShellOperatorInterface; |
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/** |
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* Escape will shell-escape commandline arguments for different platforms. |
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*/ |
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class Escape |
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{ |
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/** |
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* argsForSite escapes each argument in an array for the given site. |
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*/ |
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public static function argsForSite(SiteAliasInterface $siteAlias, $args) |
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{ |
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return array_map( |
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function ($arg) use ($siteAlias) { |
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return Escape::forSite($siteAlias, $arg); |
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}, |
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$args |
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); |
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} |
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/** |
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* forSite escapes the provided argument for the specified alias record. |
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*/ |
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public static function forSite(SiteAliasInterface $siteAlias, $arg) |
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{ |
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return static::shellArg($arg, $siteAlias->os()); |
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} |
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/** |
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* shellArg escapes the provided argument for the specified OS |
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* |
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* @param string|ShellOperatorInterface $arg The argument to escape |
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* @param string|null $os The OS to escape for. Optional; defaults to LINUX |
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* |
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* @return string The escaped string |
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*/ |
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public static function shellArg($arg, $os = null) |
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{ |
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// Short-circuit escaping for simple params (keep stuff readable); |
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// also skip escaping for shell operators (e.g. &&), which must not |
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// be escaped. |
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if (($arg instanceof ShellOperatorInterface) || preg_match('|^[a-zA-Z0-9@=.:/_-]*$|', $arg)) { |
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return (string) $arg; |
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} |
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if (static::isWindows($os)) { |
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return static::windowsArg($arg); |
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} |
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return static::linuxArg($arg); |
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} |
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/** |
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* isWindows determines whether the provided OS is Windows. |
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* |
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* @param string|null $os The OS to escape for. |
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* |
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* @return boolean |
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*/ |
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public static function isWindows($os = null) |
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{ |
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// In most cases, $os will be NULL and PHP_OS will be returned. However, |
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// if an OS is specified in $os, return that instead. |
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$os = $os ?: PHP_OS; |
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return strtoupper(substr($os, 0, 3)) === 'WIN'; |
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} |
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/** |
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* linuxArg is the Linux version of escapeshellarg(). |
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* |
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* This is intended to work the same way that escapeshellarg() does on |
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* Linux. If we need to escape a string that will be used remotely on |
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* a Linux system, then we need our own implementation of escapeshellarg, |
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* because the Windows version behaves differently. |
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* |
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* Note that we behave somewhat differently than the built-in escapeshellarg() |
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* with respect to whitespace replacement in order |
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* |
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* @param string $arg The argument to escape |
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* |
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* @return string The escaped string |
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*/ |
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public static function linuxArg($arg) |
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{ |
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// For single quotes existing in the string, we will "exit" |
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// single-quote mode, add a \' and then "re-enter" |
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// single-quote mode. The result of this is that |
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// 'quote' becomes '\''quote'\'' |
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$arg = preg_replace('/\'/', '\'\\\'\'', $arg); |
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// Replace "\t", "\n", "\r", "\0", "\x0B" with a whitespace. |
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// Note that this replacement makes Drush's escapeshellarg work differently |
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// than the built-in escapeshellarg in PHP on Linux, as these characters |
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// usually are NOT replaced. However, this was done deliberately to be more |
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// conservative when running _drush_escapeshellarg_linux on Windows |
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// (this can happen when generating a command to run on a remote Linux server.) |
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// |
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// TODO: Perhaps we should only do this if the local system is Windows? |
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// n.b. that would be a little more complicated to test. |
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$arg = str_replace(["\t", "\n", "\r", "\0", "\x0B"], ' ', $arg); |
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// Add surrounding quotes. |
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$arg = "'" . $arg . "'"; |
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return $arg; |
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} |
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/** |
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* windowsArg is the Windows version of escapeshellarg(). |
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* |
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* @param string $arg The argument to escape |
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* |
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* @return string The escaped string |
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*/ |
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public static function windowsArg($arg) |
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{ |
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if ('' === $arg || null === $arg) { |
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return '""'; |
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} |
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if (false !== strpos($arg, "\0")) { |
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$arg = str_replace("\0", '?', $arg); |
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} |
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if (!preg_match('/[\/()%!^"<>&|\s]/', $arg)) { |
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return $arg; |
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} |
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// Double up existing backslashes |
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$arg = preg_replace('/(\\\\+)$/', '$1$1', $arg); |
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// Replacing whitespace for good measure (see comment above). |
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$arg = str_replace(["\t", "\n", "\r", "\0", "\x0B"], ' ', $arg); |
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$arg = str_replace(['"', '^', '%', '!'], ['""', '"^^"', '"^%"', '"^!"'], $arg); |
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// Add surrounding quotes. |
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$arg = '"' . $arg . '"'; |
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return $arg; |
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} |
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} |
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consolidation /
site-process
