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Copy pathShell.php
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executable file
·124 lines (112 loc) · 3.43 KB
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<?php
/**
* PHP Command Line Tools
*
* This source file is subject to the MIT license that is bundled
* with this package in the file LICENSE.
*
* @author James Logsdon <dwarf@girsbrain.org>
* @copyright 2010 James Logsdom (http://girsbrain.org)
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace cli;
/**
* The `Shell` class is a utility class for shell related tasks such as
* information on width.
*/
class Shell {
/**
* Returns the number of columns the current shell has for display.
*
* @return int The number of columns.
* @todo Test on more systems.
*/
static public function columns() {
static $columns;
if ( getenv( 'PHP_CLI_TOOLS_TEST_SHELL_COLUMNS_RESET' ) ) {
$columns = null;
}
if ( null === $columns ) {
if ( ! ( $columns = (int) getenv( 'COLUMNS' ) ) ) {
if ( function_exists( 'exec' ) ) {
if ( self::is_windows() ) {
// Cater for shells such as Cygwin and Git bash where `mode CON` returns an incorrect value for columns.
if ( self::is_bashlike() && getenv( 'TERM' ) ) {
$columns = (int) exec( 'tput cols' );
}
if ( ! $columns ) {
$return_var = -1;
$output = array();
exec( 'mode CON', $output, $return_var );
if ( 0 === $return_var && $output ) {
// Look for second line ending in ": <number>" (searching for "Columns:" will fail on non-English locales).
if ( preg_match( '/:\s*[0-9]+\n[^:]+:\s*([0-9]+)\n/', implode( "\n", $output ), $matches ) ) {
$columns = (int) $matches[1];
}
}
}
} else {
$size = exec( '/usr/bin/env stty size 2>/dev/null' );
if ( '' !== $size && preg_match( '/[0-9]+ ([0-9]+)/', $size, $matches ) ) {
$columns = (int) $matches[1];
}
if ( ! $columns ) {
if ( getenv( 'TERM' ) ) {
$columns = (int) exec( '/usr/bin/env tput cols 2>/dev/null' );
}
}
}
}
}
if ( ! $columns ) {
$columns = 80; // default width of cmd window on Windows OS
}
}
return $columns;
}
/**
* Checks whether the output of the current script is a TTY or a pipe / redirect
*
* Returns true if STDOUT output is being redirected to a pipe or a file; false is
* output is being sent directly to the terminal.
*
* If an env variable SHELL_PIPE exists, returned result depends it's
* value. Strings like 1, 0, yes, no, that validate to booleans are accepted.
*
* To enable ASCII formatting even when shell is piped, use the
* ENV variable SHELL_PIPE=0
*
* @return bool
*/
static public function isPiped() {
$shellPipe = getenv('SHELL_PIPE');
if ($shellPipe !== false) {
return filter_var($shellPipe, FILTER_VALIDATE_BOOLEAN);
} else {
return (function_exists('posix_isatty') && !posix_isatty(STDOUT));
}
}
/**
* Uses `stty` to hide input/output completely.
* @param boolean $hidden Will hide/show the next data. Defaults to true.
*/
static public function hide($hidden = true) {
system( 'stty ' . ( $hidden? '-echo' : 'echo' ) );
}
/**
* Is the shell bash-like (bash or zsh)? Useful to tell if running on Cygwin or Git bash under Windows.
*
* @return bool
*/
static public function is_bashlike() {
return ( $shell = getenv( 'SHELL' ) ) && preg_match( '/(?:bash|zsh)(?:\.exe)?$/', $shell );
}
/**
* Is this shell in Windows?
*
* @return bool
*/
static private function is_windows() {
return '\\' === DIRECTORY_SEPARATOR;
}
}