122 lines
3.3 KiB
PHP
122 lines
3.3 KiB
PHP
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<?php
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/**
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* PHP Command Line Tools
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*
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* This source file is subject to the MIT license that is bundled
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* with this package in the file LICENSE.
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*
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* @author James Logsdon <dwarf@girsbrain.org>
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* @copyright 2010 James Logsdom (http://girsbrain.org)
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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namespace cli;
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/**
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* The `Shell` class is a utility class for shell related tasks such as
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* information on width.
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*/
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class Shell {
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/**
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* Returns the number of columns the current shell has for display.
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*
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* @return int The number of columns.
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* @todo Test on more systems.
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*/
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static public function columns() {
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static $columns;
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if ( getenv( 'PHP_CLI_TOOLS_TEST_SHELL_COLUMNS_RESET' ) ) {
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$columns = null;
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}
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if ( null === $columns ) {
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if ( function_exists( 'exec' ) ) {
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if ( self::is_windows() ) {
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// Cater for shells such as Cygwin and Git bash where `mode CON` returns an incorrect value for columns.
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if ( ( $shell = getenv( 'SHELL' ) ) && preg_match( '/(?:bash|zsh)(?:\.exe)?$/', $shell ) && getenv( 'TERM' ) ) {
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$columns = (int) exec( 'tput cols' );
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}
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if ( ! $columns ) {
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$return_var = -1;
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$output = array();
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exec( 'mode CON', $output, $return_var );
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if ( 0 === $return_var && $output ) {
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// Look for second line ending in ": <number>" (searching for "Columns:" will fail on non-English locales).
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if ( preg_match( '/:\s*[0-9]+\n[^:]+:\s*([0-9]+)\n/', implode( "\n", $output ), $matches ) ) {
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$columns = (int) $matches[1];
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}
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}
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}
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} else {
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if ( ! ( $columns = (int) getenv( 'COLUMNS' ) ) ) {
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$size = exec( '/usr/bin/env stty size 2>/dev/null' );
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if ( '' !== $size && preg_match( '/[0-9]+ ([0-9]+)/', $size, $matches ) ) {
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$columns = (int) $matches[1];
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}
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if ( ! $columns ) {
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if ( getenv( 'TERM' ) ) {
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$columns = (int) exec( '/usr/bin/env tput cols 2>/dev/null' );
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}
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}
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}
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}
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}
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if ( ! $columns ) {
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$columns = 80; // default width of cmd window on Windows OS
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}
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}
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return $columns;
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}
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/**
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* Checks whether the output of the current script is a TTY or a pipe / redirect
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*
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* Returns true if STDOUT output is being redirected to a pipe or a file; false is
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* output is being sent directly to the terminal.
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*
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* If an env variable SHELL_PIPE exists, returned result depends it's
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* value. Strings like 1, 0, yes, no, that validate to booleans are accepted.
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*
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* To enable ASCII formatting even when shell is piped, use the
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* ENV variable SHELL_PIPE=0
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*
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* @return bool
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*/
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static public function isPiped() {
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$shellPipe = getenv('SHELL_PIPE');
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if ($shellPipe !== false) {
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return filter_var($shellPipe, FILTER_VALIDATE_BOOLEAN);
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} else {
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if ( function_exists('stream_isatty') ) {
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return !stream_isatty(STDOUT);
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} else {
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return (function_exists('posix_isatty') && !posix_isatty(STDOUT));
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}
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}
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}
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/**
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* Uses `stty` to hide input/output completely.
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* @param boolean $hidden Will hide/show the next data. Defaults to true.
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*/
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static public function hide($hidden = true) {
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system( 'stty ' . ( $hidden? '-echo' : 'echo' ) );
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}
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/**
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* Is this shell in Windows?
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*
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* @return bool
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*/
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static private function is_windows() {
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return strtoupper(substr(PHP_OS, 0, 3)) === 'WIN';
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}
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}
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?>
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