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vendor/psy/psysh/src/Readline/GNUReadline.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2020 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Readline;
+
+/**
+ * A Readline interface implementation for GNU Readline.
+ *
+ * This is by far the coolest way to do it, but it doesn't work with new PHP.
+ *
+ * Oh well.
+ */
+class GNUReadline implements Readline
+{
+    /** @var string|false */
+    protected $historyFile;
+    /** @var int */
+    protected $historySize;
+    /** @var bool */
+    protected $eraseDups;
+
+    /**
+     * GNU Readline is supported iff `readline_list_history` is defined. PHP
+     * decided it would be awesome to swap out GNU Readline for Libedit, but
+     * they ended up shipping an incomplete implementation. So we've got this.
+     *
+     * @return bool
+     */
+    public static function isSupported()
+    {
+        return \function_exists('readline_list_history');
+    }
+
+    /**
+     * GNU Readline constructor.
+     *
+     * @param string|false $historyFile
+     * @param int          $historySize
+     * @param bool         $eraseDups
+     */
+    public function __construct($historyFile = null, $historySize = 0, $eraseDups = false)
+    {
+        $this->historyFile = ($historyFile !== null) ? $historyFile : false;
+        $this->historySize = $historySize;
+        $this->eraseDups   = $eraseDups;
+
+        // HHVM errors on this, so HHVM doesn't get a readline_name.
+        if (!\defined('HHVM_VERSION')) {
+            \readline_info('readline_name', 'psysh');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addHistory($line)
+    {
+        if ($res = \readline_add_history($line)) {
+            $this->writeHistory();
+        }
+
+        return $res;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function clearHistory()
+    {
+        if ($res = \readline_clear_history()) {
+            $this->writeHistory();
+        }
+
+        return $res;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function listHistory()
+    {
+        return readline_list_history();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readHistory()
+    {
+        // Workaround PHP bug #69054
+        //
+        // If open_basedir is set, readline_read_history() segfaults. This was fixed in 5.6.7:
+        //
+        //     https://github.com/php/php-src/blob/423a057023ef3c00d2ffc16a6b43ba01d0f71796/NEWS#L19-L21
+        //
+        if (\version_compare(PHP_VERSION, '5.6.7', '>=') || !\ini_get('open_basedir')) {
+            \readline_read_history();
+        }
+        \readline_clear_history();
+
+        return \readline_read_history($this->historyFile);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readline($prompt = null)
+    {
+        return \readline($prompt);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function redisplay()
+    {
+        \readline_redisplay();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeHistory()
+    {
+        // We have to write history first, since it is used
+        // by Libedit to list history
+        if ($this->historyFile !== false) {
+            $res = \readline_write_history($this->historyFile);
+        } else {
+            $res = true;
+        }
+
+        if (!$res || !$this->eraseDups && !$this->historySize > 0) {
+            return $res;
+        }
+
+        $hist = $this->listHistory();
+        if (!$hist) {
+            return true;
+        }
+
+        if ($this->eraseDups) {
+            // flip-flip technique: removes duplicates, latest entries win.
+            $hist = \array_flip(\array_flip($hist));
+            // sort on keys to get the order back
+            \ksort($hist);
+        }
+
+        if ($this->historySize > 0) {
+            $histsize = \count($hist);
+            if ($histsize > $this->historySize) {
+                $hist = \array_slice($hist, $histsize - $this->historySize);
+            }
+        }
+
+        \readline_clear_history();
+        foreach ($hist as $line) {
+            \readline_add_history($line);
+        }
+
+        if ($this->historyFile !== false) {
+            return \readline_write_history($this->historyFile);
+        }
+
+        return true;
+    }
+}

vendor/psy/psysh/src/Readline/HoaConsole.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2020 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Readline;
+
+use Hoa\Console\Console;
+use Hoa\Console\Cursor;
+use Hoa\Console\Readline\Readline as HoaReadline;
+use Psy\Exception\BreakException;
+
+/**
+ * Hoa\Console Readline implementation.
+ */
+class HoaConsole implements Readline
+{
+    /** @var HoaReadline */
+    private $hoaReadline;
+
+    /** @var string|null */
+    private $lastPrompt;
+
+    /**
+     * @return bool
+     */
+    public static function isSupported()
+    {
+        return \class_exists(Console::class, true);
+    }
+
+    public function __construct()
+    {
+        $this->hoaReadline = new HoaReadline();
+        $this->hoaReadline->addMapping('\C-l', function () {
+            $this->redisplay();
+
+            return HoaReadline::STATE_NO_ECHO;
+        });
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addHistory($line)
+    {
+        $this->hoaReadline->addHistory($line);
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function clearHistory()
+    {
+        $this->hoaReadline->clearHistory();
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function listHistory()
+    {
+        $i = 0;
+        $list = [];
+        while (($item = $this->hoaReadline->getHistory($i++)) !== null) {
+            $list[] = $item;
+        }
+
+        return $list;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readHistory()
+    {
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @throws BreakException if user hits Ctrl+D
+     *
+     * @return string
+     */
+    public function readline($prompt = null)
+    {
+        $this->lastPrompt = $prompt;
+
+        return $this->hoaReadline->readLine($prompt);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function redisplay()
+    {
+        $currentLine = $this->hoaReadline->getLine();
+        Cursor::clear('all');
+        echo $this->lastPrompt, $currentLine;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeHistory()
+    {
+        return true;
+    }
+}

vendor/psy/psysh/src/Readline/Libedit.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2020 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Readline;
+
+use Psy\Util\Str;
+
+/**
+ * A Libedit-based Readline implementation.
+ *
+ * This is largely the same as the Readline implementation, but it emulates
+ * support for `readline_list_history` since PHP decided it was a good idea to
+ * ship a fake Readline implementation that is missing history support.
+ */
+class Libedit extends GNUReadline
+{
+    private $hasWarnedOwnership = false;
+
+    /**
+     * Let's emulate GNU Readline by manually reading and parsing the history file!
+     *
+     * @return bool
+     */
+    public static function isSupported()
+    {
+        return \function_exists('readline') && !\function_exists('readline_list_history');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function listHistory()
+    {
+        $history = \file_get_contents($this->historyFile);
+        if (!$history) {
+            return [];
+        }
+
+        // libedit doesn't seem to support non-unix line separators.
+        $history = \explode("\n", $history);
+
+        // shift the history signature, ensure it's valid
+        if (\array_shift($history) !== '_HiStOrY_V2_') {
+            return [];
+        }
+
+        // decode the line
+        $history = \array_map([$this, 'parseHistoryLine'], $history);
+        // filter empty lines & comments
+        return \array_values(\array_filter($history));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeHistory()
+    {
+        $res = parent::writeHistory();
+
+        // Libedit apparently refuses to save history if the history file is not
+        // owned by the user, even if it is writable. Warn when this happens.
+        //
+        // See https://github.com/bobthecow/psysh/issues/552
+        if ($res === false && !$this->hasWarnedOwnership) {
+            if (\is_file($this->historyFile) && \is_writable($this->historyFile)) {
+                $this->hasWarnedOwnership = true;
+                $msg = \sprintf('Error writing history file, check file ownership: %s', $this->historyFile);
+                \trigger_error($msg, E_USER_NOTICE);
+            }
+        }
+
+        return $res;
+    }
+
+    /**
+     * From GNUReadline (readline/histfile.c & readline/histexpand.c):
+     * lines starting with "\0" are comments or timestamps;
+     * if "\0" is found in an entry,
+     * everything from it until the next line is a comment.
+     *
+     * @param string $line The history line to parse
+     *
+     * @return string | null
+     */
+    protected function parseHistoryLine($line)
+    {
+        // empty line, comment or timestamp
+        if (!$line || $line[0] === "\0") {
+            return;
+        }
+        // if "\0" is found in an entry, then
+        // everything from it until the end of line is a comment.
+        if (($pos = \strpos($line, "\0")) !== false) {
+            $line = \substr($line, 0, $pos);
+        }
+
+        return ($line !== '') ? Str::unvis($line) : null;
+    }
+}

vendor/psy/psysh/src/Readline/Readline.php

@@ -0,0 +1,76 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2020 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Readline;
+
+/**
+ * An interface abstracting the various readline_* functions.
+ */
+interface Readline
+{
+    /**
+     * Check whether this Readline class is supported by the current system.
+     *
+     * @return bool
+     */
+    public static function isSupported();
+
+    /**
+     * Add a line to the command history.
+     *
+     * @param string $line
+     *
+     * @return bool Success
+     */
+    public function addHistory($line);
+
+    /**
+     * Clear the command history.
+     *
+     * @return bool Success
+     */
+    public function clearHistory();
+
+    /**
+     * List the command history.
+     *
+     * @return array
+     */
+    public function listHistory();
+
+    /**
+     * Read the command history.
+     *
+     * @return bool Success
+     */
+    public function readHistory();
+
+    /**
+     * Read a single line of input from the user.
+     *
+     * @param string|null $prompt
+     *
+     * @return false|string
+     */
+    public function readline($prompt = null);
+
+    /**
+     * Redraw readline to redraw the display.
+     */
+    public function redisplay();
+
+    /**
+     * Write the command history to a file.
+     *
+     * @return bool Success
+     */
+    public function writeHistory();
+}

vendor/psy/psysh/src/Readline/Transient.php

@@ -0,0 +1,147 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2020 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Readline;
+
+use Psy\Exception\BreakException;
+
+/**
+ * An array-based Readline emulation implementation.
+ */
+class Transient implements Readline
+{
+    private $history;
+    private $historySize;
+    private $eraseDups;
+    private $stdin;
+
+    /**
+     * Transient Readline is always supported.
+     *
+     * {@inheritdoc}
+     */
+    public static function isSupported()
+    {
+        return true;
+    }
+
+    /**
+     * Transient Readline constructor.
+     */
+    public function __construct($historyFile = null, $historySize = 0, $eraseDups = false)
+    {
+        // don't do anything with the history file...
+        $this->history     = [];
+        $this->historySize = $historySize;
+        $this->eraseDups   = $eraseDups;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addHistory($line)
+    {
+        if ($this->eraseDups) {
+            if (($key = \array_search($line, $this->history)) !== false) {
+                unset($this->history[$key]);
+            }
+        }
+
+        $this->history[] = $line;
+
+        if ($this->historySize > 0) {
+            $histsize = \count($this->history);
+            if ($histsize > $this->historySize) {
+                $this->history = \array_slice($this->history, $histsize - $this->historySize);
+            }
+        }
+
+        $this->history = \array_values($this->history);
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function clearHistory()
+    {
+        $this->history = [];
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function listHistory()
+    {
+        return $this->history;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function readHistory()
+    {
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @throws BreakException if user hits Ctrl+D
+     *
+     * @return string
+     */
+    public function readline($prompt = null)
+    {
+        echo $prompt;
+
+        return \rtrim(\fgets($this->getStdin()), "\n\r");
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function redisplay()
+    {
+        // noop
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function writeHistory()
+    {
+        return true;
+    }
+
+    /**
+     * Get a STDIN file handle.
+     *
+     * @throws BreakException if user hits Ctrl+D
+     *
+     * @return resource
+     */
+    private function getStdin()
+    {
+        if (!isset($this->stdin)) {
+            $this->stdin = \fopen('php://stdin', 'r');
+        }
+
+        if (\feof($this->stdin)) {
+            throw new BreakException('Ctrl+D');
+        }
+
+        return $this->stdin;
+    }
+}