4b7a36ea19
Uses readline for line input editing if available; falls back to bash+readline if not native, and takes fgets() in worst case. Currently a bit awkward in that each input line is parsed separately, so loops and function defs have to be squished to one line.
154 lines
4.5 KiB
PHP
Executable File
154 lines
4.5 KiB
PHP
Executable File
#!/usr/bin/env php
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<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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# Abort if called from a web server
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define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
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$helptext = <<<ENDOFHELP
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console.php - provide an interactive PHP interpreter for testing
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ENDOFHELP;
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require_once INSTALLDIR.'/scripts/commandline.inc';
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if (function_exists('posix_isatty')) {
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define('CONSOLE_INTERACTIVE', posix_isatty(0));
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} else {
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// Windows? Assume we're on a terminal. :P
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define('CONSOLE_INTERACTIVE', false);
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}
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if (CONSOLE_INTERACTIVE) {
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define('CONSOLE_READLINE', function_exists('readline'));
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}
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if (CONSOLE_READLINE && CONSOLE_INTERACTIVE && file_exists(CONSOLE_HISTORY)) {
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define(CONSOLE_HISTORY, getenv("HOME") . "/.statusnet_console_history");
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readline_read_history(CONSOLE_HISTORY);
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}
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function read_input_line($prompt)
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{
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if (CONSOLE_INTERACTIVE) {
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if (CONSOLE_READLINE) {
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$line = readline($prompt);
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readline_add_history($line);
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return $line;
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} else {
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return readline_emulation($prompt);
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}
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} else {
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return fgets(STDIN);
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}
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}
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/**
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* On Unix-like systems where PHP readline extension isn't present,
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* -cough- Mac OS X -cough- we can shell out to bash to do it for us.
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* This lets us at least handle things like arrow keys, but we don't
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* get any entry history. :(
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*
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* Shamelessly ripped from when I wrote the same code for MediaWiki. :)
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* @author Brion Vibber <brion@status.net>
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*
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* @param string $prompt
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* @return mixed string on success, false on fail or EOF
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*/
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function readline_emulation($prompt)
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{
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if(file_exists(trim(shell_exec('which bash')))) {
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$encPrompt = escapeshellarg($prompt);
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$command = "read -er -p $encPrompt && echo \"\$REPLY\"";
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$encCommand = escapeshellarg($command);
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$metaCommand = "bash -c $encCommand";
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// passthru passes our STDIN and TTY to the child...
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// We can pull the returned string via output buffering.
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ob_start();
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$retval = false;
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passthru($metaCommand, $retval);
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$line = ob_get_contents();
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ob_end_clean();
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if ($retval == 0) {
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return $line;
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} elseif ($retval == 127) {
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// Couldn't execute bash even though we thought we saw it.
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// Shell probably spit out an error message, sorry :(
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// Fall through to fgets()...
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} else {
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// EOF/ctrl+D
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return false;
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}
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}
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// Fallback... we'll have no editing controls, EWWW
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if (feof(STDIN)) {
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return false;
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}
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print $prompt;
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return fgets(STDIN);
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}
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function console_help()
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{
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print "Welcome to StatusNet's interactive PHP console!\n";
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print "Type some PHP code and it'll run!\n";
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print "\n";
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print "Note that PHP is cranky and you can easily kill your session.\n";
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}
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$prompt = common_config('site', 'name') . '> ';
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while (!feof(STDIN)) {
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$line = read_input_line($prompt);
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if ($line === false) {
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print "\n";
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break;
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} elseif ($line !== '') {
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try {
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if ($line == 'exit') {
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break;
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} elseif ($line == 'help') {
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console_help();
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continue;
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}
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// Let's do this
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$result = eval($line);
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if ($result === false) {
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// parse error
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} elseif ($result === null) {
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// no return
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} else {
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// return value from eval'd code
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var_export($result);
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}
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} catch(Exception $e) {
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print get_class($e) . ": " . $e->getMessage() . "\n";
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}
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}
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print "\n";
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}
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if (CONSOLE_READLINE && CONSOLE_INTERACTIVE) {
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@readline_write_history(CONSOLE_HISTORY);
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}
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