diff vendor/psy/psysh/src/Configuration.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/psy/psysh/src/Configuration.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,1307 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy;
+
+use Psy\Exception\DeprecatedException;
+use Psy\Exception\RuntimeException;
+use Psy\Output\OutputPager;
+use Psy\Output\ShellOutput;
+use Psy\Readline\GNUReadline;
+use Psy\Readline\HoaConsole;
+use Psy\Readline\Libedit;
+use Psy\Readline\Readline;
+use Psy\Readline\Transient;
+use Psy\TabCompletion\AutoCompleter;
+use Psy\VarDumper\Presenter;
+use Psy\VersionUpdater\Checker;
+use Psy\VersionUpdater\GitHubChecker;
+use Psy\VersionUpdater\IntervalChecker;
+use Psy\VersionUpdater\NoopChecker;
+
+/**
+ * The Psy Shell configuration.
+ */
+class Configuration
+{
+    const COLOR_MODE_AUTO     = 'auto';
+    const COLOR_MODE_FORCED   = 'forced';
+    const COLOR_MODE_DISABLED = 'disabled';
+
+    private static $AVAILABLE_OPTIONS = [
+        'codeCleaner',
+        'colorMode',
+        'configDir',
+        'dataDir',
+        'defaultIncludes',
+        'eraseDuplicates',
+        'errorLoggingLevel',
+        'forceArrayIndexes',
+        'historySize',
+        'manualDbFile',
+        'pager',
+        'prompt',
+        'requireSemicolons',
+        'runtimeDir',
+        'startupMessage',
+        'updateCheck',
+        'useBracketedPaste',
+        'usePcntl',
+        'useReadline',
+        'useTabCompletion',
+        'useUnicode',
+        'warnOnMultipleConfigs',
+    ];
+
+    private $defaultIncludes;
+    private $configDir;
+    private $dataDir;
+    private $runtimeDir;
+    private $configFile;
+    /** @var string|false */
+    private $historyFile;
+    private $historySize;
+    private $eraseDuplicates;
+    private $manualDbFile;
+    private $hasReadline;
+    private $useReadline;
+    private $useBracketedPaste;
+    private $hasPcntl;
+    private $usePcntl;
+    private $newCommands       = [];
+    private $requireSemicolons = false;
+    private $useUnicode;
+    private $useTabCompletion;
+    private $newMatchers = [];
+    private $errorLoggingLevel = E_ALL;
+    private $warnOnMultipleConfigs = false;
+    private $colorMode;
+    private $updateCheck;
+    private $startupMessage;
+    private $forceArrayIndexes = false;
+
+    // services
+    private $readline;
+    private $output;
+    private $shell;
+    private $cleaner;
+    private $pager;
+    private $manualDb;
+    private $presenter;
+    private $autoCompleter;
+    private $checker;
+    private $prompt;
+
+    /**
+     * Construct a Configuration instance.
+     *
+     * Optionally, supply an array of configuration values to load.
+     *
+     * @param array $config Optional array of configuration values
+     */
+    public function __construct(array $config = [])
+    {
+        $this->setColorMode(self::COLOR_MODE_AUTO);
+
+        // explicit configFile option
+        if (isset($config['configFile'])) {
+            $this->configFile = $config['configFile'];
+        } elseif ($configFile = getenv('PSYSH_CONFIG')) {
+            $this->configFile = $configFile;
+        }
+
+        // legacy baseDir option
+        if (isset($config['baseDir'])) {
+            $msg = "The 'baseDir' configuration option is deprecated; " .
+                "please specify 'configDir' and 'dataDir' options instead";
+            throw new DeprecatedException($msg);
+        }
+
+        unset($config['configFile'], $config['baseDir']);
+
+        // go go gadget, config!
+        $this->loadConfig($config);
+        $this->init();
+    }
+
+    /**
+     * Initialize the configuration.
+     *
+     * This checks for the presence of Readline and Pcntl extensions.
+     *
+     * If a config file is available, it will be loaded and merged with the current config.
+     *
+     * If no custom config file was specified and a local project config file
+     * is available, it will be loaded and merged with the current config.
+     */
+    public function init()
+    {
+        // feature detection
+        $this->hasReadline = function_exists('readline');
+        $this->hasPcntl    = function_exists('pcntl_signal') && function_exists('posix_getpid');
+
+        if ($configFile = $this->getConfigFile()) {
+            $this->loadConfigFile($configFile);
+        }
+
+        if (!$this->configFile && $localConfig = $this->getLocalConfigFile()) {
+            $this->loadConfigFile($localConfig);
+        }
+    }
+
+    /**
+     * Get the current PsySH config file.
+     *
+     * If a `configFile` option was passed to the Configuration constructor,
+     * this file will be returned. If not, all possible config directories will
+     * be searched, and the first `config.php` or `rc.php` file which exists
+     * will be returned.
+     *
+     * If you're trying to decide where to put your config file, pick
+     *
+     *     ~/.config/psysh/config.php
+     *
+     * @return string
+     */
+    public function getConfigFile()
+    {
+        if (isset($this->configFile)) {
+            return $this->configFile;
+        }
+
+        $files = ConfigPaths::getConfigFiles(['config.php', 'rc.php'], $this->configDir);
+
+        if (!empty($files)) {
+            if ($this->warnOnMultipleConfigs && count($files) > 1) {
+                $msg = sprintf('Multiple configuration files found: %s. Using %s', implode($files, ', '), $files[0]);
+                trigger_error($msg, E_USER_NOTICE);
+            }
+
+            return $files[0];
+        }
+    }
+
+    /**
+     * Get the local PsySH config file.
+     *
+     * Searches for a project specific config file `.psysh.php` in the current
+     * working directory.
+     *
+     * @return string
+     */
+    public function getLocalConfigFile()
+    {
+        $localConfig = getcwd() . '/.psysh.php';
+
+        if (@is_file($localConfig)) {
+            return $localConfig;
+        }
+    }
+
+    /**
+     * Load configuration values from an array of options.
+     *
+     * @param array $options
+     */
+    public function loadConfig(array $options)
+    {
+        foreach (self::$AVAILABLE_OPTIONS as $option) {
+            if (isset($options[$option])) {
+                $method = 'set' . ucfirst($option);
+                $this->$method($options[$option]);
+            }
+        }
+
+        // legacy `tabCompletion` option
+        if (isset($options['tabCompletion'])) {
+            $msg = '`tabCompletion` is deprecated; use `useTabCompletion` instead.';
+            @trigger_error($msg, E_USER_DEPRECATED);
+
+            $this->setUseTabCompletion($options['tabCompletion']);
+        }
+
+        foreach (['commands', 'matchers', 'casters'] as $option) {
+            if (isset($options[$option])) {
+                $method = 'add' . ucfirst($option);
+                $this->$method($options[$option]);
+            }
+        }
+
+        // legacy `tabCompletionMatchers` option
+        if (isset($options['tabCompletionMatchers'])) {
+            $msg = '`tabCompletionMatchers` is deprecated; use `matchers` instead.';
+            @trigger_error($msg, E_USER_DEPRECATED);
+
+            $this->addMatchers($options['tabCompletionMatchers']);
+        }
+    }
+
+    /**
+     * Load a configuration file (default: `$HOME/.config/psysh/config.php`).
+     *
+     * This configuration instance will be available to the config file as $config.
+     * The config file may directly manipulate the configuration, or may return
+     * an array of options which will be merged with the current configuration.
+     *
+     * @throws \InvalidArgumentException if the config file returns a non-array result
+     *
+     * @param string $file
+     */
+    public function loadConfigFile($file)
+    {
+        $__psysh_config_file__ = $file;
+        $load = function ($config) use ($__psysh_config_file__) {
+            $result = require $__psysh_config_file__;
+            if ($result !== 1) {
+                return $result;
+            }
+        };
+        $result = $load($this);
+
+        if (!empty($result)) {
+            if (is_array($result)) {
+                $this->loadConfig($result);
+            } else {
+                throw new \InvalidArgumentException('Psy Shell configuration must return an array of options');
+            }
+        }
+    }
+
+    /**
+     * Set files to be included by default at the start of each shell session.
+     *
+     * @param array $includes
+     */
+    public function setDefaultIncludes(array $includes = [])
+    {
+        $this->defaultIncludes = $includes;
+    }
+
+    /**
+     * Get files to be included by default at the start of each shell session.
+     *
+     * @return array
+     */
+    public function getDefaultIncludes()
+    {
+        return $this->defaultIncludes ?: [];
+    }
+
+    /**
+     * Set the shell's config directory location.
+     *
+     * @param string $dir
+     */
+    public function setConfigDir($dir)
+    {
+        $this->configDir = (string) $dir;
+    }
+
+    /**
+     * Get the current configuration directory, if any is explicitly set.
+     *
+     * @return string
+     */
+    public function getConfigDir()
+    {
+        return $this->configDir;
+    }
+
+    /**
+     * Set the shell's data directory location.
+     *
+     * @param string $dir
+     */
+    public function setDataDir($dir)
+    {
+        $this->dataDir = (string) $dir;
+    }
+
+    /**
+     * Get the current data directory, if any is explicitly set.
+     *
+     * @return string
+     */
+    public function getDataDir()
+    {
+        return $this->dataDir;
+    }
+
+    /**
+     * Set the shell's temporary directory location.
+     *
+     * @param string $dir
+     */
+    public function setRuntimeDir($dir)
+    {
+        $this->runtimeDir = (string) $dir;
+    }
+
+    /**
+     * Get the shell's temporary directory location.
+     *
+     * Defaults to  `/psysh` inside the system's temp dir unless explicitly
+     * overridden.
+     *
+     * @return string
+     */
+    public function getRuntimeDir()
+    {
+        if (!isset($this->runtimeDir)) {
+            $this->runtimeDir = ConfigPaths::getRuntimeDir();
+        }
+
+        if (!is_dir($this->runtimeDir)) {
+            mkdir($this->runtimeDir, 0700, true);
+        }
+
+        return $this->runtimeDir;
+    }
+
+    /**
+     * Set the readline history file path.
+     *
+     * @param string $file
+     */
+    public function setHistoryFile($file)
+    {
+        $this->historyFile = ConfigPaths::touchFileWithMkdir($file);
+    }
+
+    /**
+     * Get the readline history file path.
+     *
+     * Defaults to `/history` inside the shell's base config dir unless
+     * explicitly overridden.
+     *
+     * @return string
+     */
+    public function getHistoryFile()
+    {
+        if (isset($this->historyFile)) {
+            return $this->historyFile;
+        }
+
+        $files = ConfigPaths::getConfigFiles(['psysh_history', 'history'], $this->configDir);
+
+        if (!empty($files)) {
+            if ($this->warnOnMultipleConfigs && count($files) > 1) {
+                $msg = sprintf('Multiple history files found: %s. Using %s', implode($files, ', '), $files[0]);
+                trigger_error($msg, E_USER_NOTICE);
+            }
+
+            $this->setHistoryFile($files[0]);
+        } else {
+            // fallback: create our own history file
+            $dir = $this->configDir ?: ConfigPaths::getCurrentConfigDir();
+            $this->setHistoryFile($dir . '/psysh_history');
+        }
+
+        return $this->historyFile;
+    }
+
+    /**
+     * Set the readline max history size.
+     *
+     * @param int $value
+     */
+    public function setHistorySize($value)
+    {
+        $this->historySize = (int) $value;
+    }
+
+    /**
+     * Get the readline max history size.
+     *
+     * @return int
+     */
+    public function getHistorySize()
+    {
+        return $this->historySize;
+    }
+
+    /**
+     * Sets whether readline erases old duplicate history entries.
+     *
+     * @param bool $value
+     */
+    public function setEraseDuplicates($value)
+    {
+        $this->eraseDuplicates = (bool) $value;
+    }
+
+    /**
+     * Get whether readline erases old duplicate history entries.
+     *
+     * @return bool
+     */
+    public function getEraseDuplicates()
+    {
+        return $this->eraseDuplicates;
+    }
+
+    /**
+     * Get a temporary file of type $type for process $pid.
+     *
+     * The file will be created inside the current temporary directory.
+     *
+     * @see self::getRuntimeDir
+     *
+     * @param string $type
+     * @param int    $pid
+     *
+     * @return string Temporary file name
+     */
+    public function getTempFile($type, $pid)
+    {
+        return tempnam($this->getRuntimeDir(), $type . '_' . $pid . '_');
+    }
+
+    /**
+     * Get a filename suitable for a FIFO pipe of $type for process $pid.
+     *
+     * The pipe will be created inside the current temporary directory.
+     *
+     * @param string $type
+     * @param int    $pid
+     *
+     * @return string Pipe name
+     */
+    public function getPipe($type, $pid)
+    {
+        return sprintf('%s/%s_%s', $this->getRuntimeDir(), $type, $pid);
+    }
+
+    /**
+     * Check whether this PHP instance has Readline available.
+     *
+     * @return bool True if Readline is available
+     */
+    public function hasReadline()
+    {
+        return $this->hasReadline;
+    }
+
+    /**
+     * Enable or disable Readline usage.
+     *
+     * @param bool $useReadline
+     */
+    public function setUseReadline($useReadline)
+    {
+        $this->useReadline = (bool) $useReadline;
+    }
+
+    /**
+     * Check whether to use Readline.
+     *
+     * If `setUseReadline` as been set to true, but Readline is not actually
+     * available, this will return false.
+     *
+     * @return bool True if the current Shell should use Readline
+     */
+    public function useReadline()
+    {
+        return isset($this->useReadline) ? ($this->hasReadline && $this->useReadline) : $this->hasReadline;
+    }
+
+    /**
+     * Set the Psy Shell readline service.
+     *
+     * @param Readline $readline
+     */
+    public function setReadline(Readline $readline)
+    {
+        $this->readline = $readline;
+    }
+
+    /**
+     * Get the Psy Shell readline service.
+     *
+     * By default, this service uses (in order of preference):
+     *
+     *  * GNU Readline
+     *  * Libedit
+     *  * A transient array-based readline emulation.
+     *
+     * @return Readline
+     */
+    public function getReadline()
+    {
+        if (!isset($this->readline)) {
+            $className = $this->getReadlineClass();
+            $this->readline = new $className(
+                $this->getHistoryFile(),
+                $this->getHistorySize(),
+                $this->getEraseDuplicates()
+            );
+        }
+
+        return $this->readline;
+    }
+
+    /**
+     * Get the appropriate Readline implementation class name.
+     *
+     * @see self::getReadline
+     *
+     * @return string
+     */
+    private function getReadlineClass()
+    {
+        if ($this->useReadline()) {
+            if (GNUReadline::isSupported()) {
+                return 'Psy\Readline\GNUReadline';
+            } elseif (Libedit::isSupported()) {
+                return 'Psy\Readline\Libedit';
+            } elseif (HoaConsole::isSupported()) {
+                return 'Psy\Readline\HoaConsole';
+            }
+        }
+
+        return 'Psy\Readline\Transient';
+    }
+
+    /**
+     * Enable or disable bracketed paste.
+     *
+     * Note that this only works with readline (not libedit) integration for now.
+     *
+     * @param bool $useBracketedPaste
+     */
+    public function setUseBracketedPaste($useBracketedPaste)
+    {
+        $this->useBracketedPaste = (bool) $useBracketedPaste;
+    }
+
+    /**
+     * Check whether to use bracketed paste with readline.
+     *
+     * When this works, it's magical. Tabs in pastes don't try to autcomplete.
+     * Newlines in paste don't execute code until you get to the end. It makes
+     * readline act like you'd expect when pasting.
+     *
+     * But it often (usually?) does not work. And when it doesn't, it just spews
+     * escape codes all over the place and generally makes things ugly :(
+     *
+     * If `useBracketedPaste` has been set to true, but the current readline
+     * implementation is anything besides GNU readline, this will return false.
+     *
+     * @return bool True if the shell should use bracketed paste
+     */
+    public function useBracketedPaste()
+    {
+        // For now, only the GNU readline implementation supports bracketed paste.
+        $supported = ($this->getReadlineClass() === 'Psy\Readline\GNUReadline');
+
+        return $supported && $this->useBracketedPaste;
+
+        // @todo mebbe turn this on by default some day?
+        // return isset($this->useBracketedPaste) ? ($supported && $this->useBracketedPaste) : $supported;
+    }
+
+    /**
+     * Check whether this PHP instance has Pcntl available.
+     *
+     * @return bool True if Pcntl is available
+     */
+    public function hasPcntl()
+    {
+        return $this->hasPcntl;
+    }
+
+    /**
+     * Enable or disable Pcntl usage.
+     *
+     * @param bool $usePcntl
+     */
+    public function setUsePcntl($usePcntl)
+    {
+        $this->usePcntl = (bool) $usePcntl;
+    }
+
+    /**
+     * Check whether to use Pcntl.
+     *
+     * If `setUsePcntl` has been set to true, but Pcntl is not actually
+     * available, this will return false.
+     *
+     * @return bool True if the current Shell should use Pcntl
+     */
+    public function usePcntl()
+    {
+        return isset($this->usePcntl) ? ($this->hasPcntl && $this->usePcntl) : $this->hasPcntl;
+    }
+
+    /**
+     * Enable or disable strict requirement of semicolons.
+     *
+     * @see self::requireSemicolons()
+     *
+     * @param bool $requireSemicolons
+     */
+    public function setRequireSemicolons($requireSemicolons)
+    {
+        $this->requireSemicolons = (bool) $requireSemicolons;
+    }
+
+    /**
+     * Check whether to require semicolons on all statements.
+     *
+     * By default, PsySH will automatically insert semicolons at the end of
+     * statements if they're missing. To strictly require semicolons, set
+     * `requireSemicolons` to true.
+     *
+     * @return bool
+     */
+    public function requireSemicolons()
+    {
+        return $this->requireSemicolons;
+    }
+
+    /**
+     * Enable or disable Unicode in PsySH specific output.
+     *
+     * Note that this does not disable Unicode output in general, it just makes
+     * it so PsySH won't output any itself.
+     *
+     * @param bool $useUnicode
+     */
+    public function setUseUnicode($useUnicode)
+    {
+        $this->useUnicode = (bool) $useUnicode;
+    }
+
+    /**
+     * Check whether to use Unicode in PsySH specific output.
+     *
+     * Note that this does not disable Unicode output in general, it just makes
+     * it so PsySH won't output any itself.
+     *
+     * @return bool
+     */
+    public function useUnicode()
+    {
+        if (isset($this->useUnicode)) {
+            return $this->useUnicode;
+        }
+
+        // @todo detect `chsh` != 65001 on Windows and return false
+        return true;
+    }
+
+    /**
+     * Set the error logging level.
+     *
+     * @see self::errorLoggingLevel
+     *
+     * @param bool $errorLoggingLevel
+     */
+    public function setErrorLoggingLevel($errorLoggingLevel)
+    {
+        $this->errorLoggingLevel = (E_ALL | E_STRICT) & $errorLoggingLevel;
+    }
+
+    /**
+     * Get the current error logging level.
+     *
+     * By default, PsySH will automatically log all errors, regardless of the
+     * current `error_reporting` level. Additionally, if the `error_reporting`
+     * level warrants, an ErrorException will be thrown.
+     *
+     * Set `errorLoggingLevel` to 0 to prevent logging non-thrown errors. Set it
+     * to any valid error_reporting value to log only errors which match that
+     * level.
+     *
+     *     http://php.net/manual/en/function.error-reporting.php
+     *
+     * @return int
+     */
+    public function errorLoggingLevel()
+    {
+        return $this->errorLoggingLevel;
+    }
+
+    /**
+     * Set a CodeCleaner service instance.
+     *
+     * @param CodeCleaner $cleaner
+     */
+    public function setCodeCleaner(CodeCleaner $cleaner)
+    {
+        $this->cleaner = $cleaner;
+    }
+
+    /**
+     * Get a CodeCleaner service instance.
+     *
+     * If none has been explicitly defined, this will create a new instance.
+     *
+     * @return CodeCleaner
+     */
+    public function getCodeCleaner()
+    {
+        if (!isset($this->cleaner)) {
+            $this->cleaner = new CodeCleaner();
+        }
+
+        return $this->cleaner;
+    }
+
+    /**
+     * Enable or disable tab completion.
+     *
+     * @param bool $useTabCompletion
+     */
+    public function setUseTabCompletion($useTabCompletion)
+    {
+        $this->useTabCompletion = (bool) $useTabCompletion;
+    }
+
+    /**
+     * @deprecated Call `setUseTabCompletion` instead
+     *
+     * @param bool $useTabCompletion
+     */
+    public function setTabCompletion($useTabCompletion)
+    {
+        $this->setUseTabCompletion($useTabCompletion);
+    }
+
+    /**
+     * Check whether to use tab completion.
+     *
+     * If `setUseTabCompletion` has been set to true, but readline is not
+     * actually available, this will return false.
+     *
+     * @return bool True if the current Shell should use tab completion
+     */
+    public function useTabCompletion()
+    {
+        return isset($this->useTabCompletion) ? ($this->hasReadline && $this->useTabCompletion) : $this->hasReadline;
+    }
+
+    /**
+     * @deprecated Call `useTabCompletion` instead
+     *
+     * @return bool
+     */
+    public function getTabCompletion()
+    {
+        return $this->useTabCompletion();
+    }
+
+    /**
+     * Set the Shell Output service.
+     *
+     * @param ShellOutput $output
+     */
+    public function setOutput(ShellOutput $output)
+    {
+        $this->output = $output;
+    }
+
+    /**
+     * Get a Shell Output service instance.
+     *
+     * If none has been explicitly provided, this will create a new instance
+     * with VERBOSITY_NORMAL and the output page supplied by self::getPager
+     *
+     * @see self::getPager
+     *
+     * @return ShellOutput
+     */
+    public function getOutput()
+    {
+        if (!isset($this->output)) {
+            $this->output = new ShellOutput(
+                ShellOutput::VERBOSITY_NORMAL,
+                $this->getOutputDecorated(),
+                null,
+                $this->getPager()
+            );
+        }
+
+        return $this->output;
+    }
+
+    /**
+     * Get the decoration (i.e. color) setting for the Shell Output service.
+     *
+     * @return null|bool 3-state boolean corresponding to the current color mode
+     */
+    public function getOutputDecorated()
+    {
+        if ($this->colorMode() === self::COLOR_MODE_AUTO) {
+            return;
+        } elseif ($this->colorMode() === self::COLOR_MODE_FORCED) {
+            return true;
+        } elseif ($this->colorMode() === self::COLOR_MODE_DISABLED) {
+            return false;
+        }
+    }
+
+    /**
+     * Set the OutputPager service.
+     *
+     * If a string is supplied, a ProcOutputPager will be used which shells out
+     * to the specified command.
+     *
+     * @throws \InvalidArgumentException if $pager is not a string or OutputPager instance
+     *
+     * @param string|OutputPager $pager
+     */
+    public function setPager($pager)
+    {
+        if ($pager && !is_string($pager) && !$pager instanceof OutputPager) {
+            throw new \InvalidArgumentException('Unexpected pager instance');
+        }
+
+        $this->pager = $pager;
+    }
+
+    /**
+     * Get an OutputPager instance or a command for an external Proc pager.
+     *
+     * If no Pager has been explicitly provided, and Pcntl is available, this
+     * will default to `cli.pager` ini value, falling back to `which less`.
+     *
+     * @return string|OutputPager
+     */
+    public function getPager()
+    {
+        if (!isset($this->pager) && $this->usePcntl()) {
+            if ($pager = ini_get('cli.pager')) {
+                // use the default pager
+                $this->pager = $pager;
+            } elseif ($less = exec('which less 2>/dev/null')) {
+                // check for the presence of less...
+                $this->pager = $less . ' -R -S -F -X';
+            }
+        }
+
+        return $this->pager;
+    }
+
+    /**
+     * Set the Shell AutoCompleter service.
+     *
+     * @param AutoCompleter $autoCompleter
+     */
+    public function setAutoCompleter(AutoCompleter $autoCompleter)
+    {
+        $this->autoCompleter = $autoCompleter;
+    }
+
+    /**
+     * Get an AutoCompleter service instance.
+     *
+     * @return AutoCompleter
+     */
+    public function getAutoCompleter()
+    {
+        if (!isset($this->autoCompleter)) {
+            $this->autoCompleter = new AutoCompleter();
+        }
+
+        return $this->autoCompleter;
+    }
+
+    /**
+     * @deprecated Nothing should be using this anymore
+     *
+     * @return array
+     */
+    public function getTabCompletionMatchers()
+    {
+        return [];
+    }
+
+    /**
+     * Add tab completion matchers to the AutoCompleter.
+     *
+     * This will buffer new matchers in the event that the Shell has not yet
+     * been instantiated. This allows the user to specify matchers in their
+     * config rc file, despite the fact that their file is needed in the Shell
+     * constructor.
+     *
+     * @param array $matchers
+     */
+    public function addMatchers(array $matchers)
+    {
+        $this->newMatchers = array_merge($this->newMatchers, $matchers);
+        if (isset($this->shell)) {
+            $this->doAddMatchers();
+        }
+    }
+
+    /**
+     * Internal method for adding tab completion matchers. This will set any new
+     * matchers once a Shell is available.
+     */
+    private function doAddMatchers()
+    {
+        if (!empty($this->newMatchers)) {
+            $this->shell->addMatchers($this->newMatchers);
+            $this->newMatchers = [];
+        }
+    }
+
+    /**
+     * @deprecated Use `addMatchers` instead
+     *
+     * @param array $matchers
+     */
+    public function addTabCompletionMatchers(array $matchers)
+    {
+        $this->addMatchers($matchers);
+    }
+
+    /**
+     * Add commands to the Shell.
+     *
+     * This will buffer new commands in the event that the Shell has not yet
+     * been instantiated. This allows the user to specify commands in their
+     * config rc file, despite the fact that their file is needed in the Shell
+     * constructor.
+     *
+     * @param array $commands
+     */
+    public function addCommands(array $commands)
+    {
+        $this->newCommands = array_merge($this->newCommands, $commands);
+        if (isset($this->shell)) {
+            $this->doAddCommands();
+        }
+    }
+
+    /**
+     * Internal method for adding commands. This will set any new commands once
+     * a Shell is available.
+     */
+    private function doAddCommands()
+    {
+        if (!empty($this->newCommands)) {
+            $this->shell->addCommands($this->newCommands);
+            $this->newCommands = [];
+        }
+    }
+
+    /**
+     * Set the Shell backreference and add any new commands to the Shell.
+     *
+     * @param Shell $shell
+     */
+    public function setShell(Shell $shell)
+    {
+        $this->shell = $shell;
+        $this->doAddCommands();
+        $this->doAddMatchers();
+    }
+
+    /**
+     * Set the PHP manual database file.
+     *
+     * This file should be an SQLite database generated from the phpdoc source
+     * with the `bin/build_manual` script.
+     *
+     * @param string $filename
+     */
+    public function setManualDbFile($filename)
+    {
+        $this->manualDbFile = (string) $filename;
+    }
+
+    /**
+     * Get the current PHP manual database file.
+     *
+     * @return string Default: '~/.local/share/psysh/php_manual.sqlite'
+     */
+    public function getManualDbFile()
+    {
+        if (isset($this->manualDbFile)) {
+            return $this->manualDbFile;
+        }
+
+        $files = ConfigPaths::getDataFiles(['php_manual.sqlite'], $this->dataDir);
+        if (!empty($files)) {
+            if ($this->warnOnMultipleConfigs && count($files) > 1) {
+                $msg = sprintf('Multiple manual database files found: %s. Using %s', implode($files, ', '), $files[0]);
+                trigger_error($msg, E_USER_NOTICE);
+            }
+
+            return $this->manualDbFile = $files[0];
+        }
+    }
+
+    /**
+     * Get a PHP manual database connection.
+     *
+     * @return \PDO
+     */
+    public function getManualDb()
+    {
+        if (!isset($this->manualDb)) {
+            $dbFile = $this->getManualDbFile();
+            if (is_file($dbFile)) {
+                try {
+                    $this->manualDb = new \PDO('sqlite:' . $dbFile);
+                } catch (\PDOException $e) {
+                    if ($e->getMessage() === 'could not find driver') {
+                        throw new RuntimeException('SQLite PDO driver not found', 0, $e);
+                    } else {
+                        throw $e;
+                    }
+                }
+            }
+        }
+
+        return $this->manualDb;
+    }
+
+    /**
+     * Add an array of casters definitions.
+     *
+     * @param array $casters
+     */
+    public function addCasters(array $casters)
+    {
+        $this->getPresenter()->addCasters($casters);
+    }
+
+    /**
+     * Get the Presenter service.
+     *
+     * @return Presenter
+     */
+    public function getPresenter()
+    {
+        if (!isset($this->presenter)) {
+            $this->presenter = new Presenter($this->getOutput()->getFormatter(), $this->forceArrayIndexes());
+        }
+
+        return $this->presenter;
+    }
+
+    /**
+     * Enable or disable warnings on multiple configuration or data files.
+     *
+     * @see self::warnOnMultipleConfigs()
+     *
+     * @param bool $warnOnMultipleConfigs
+     */
+    public function setWarnOnMultipleConfigs($warnOnMultipleConfigs)
+    {
+        $this->warnOnMultipleConfigs = (bool) $warnOnMultipleConfigs;
+    }
+
+    /**
+     * Check whether to warn on multiple configuration or data files.
+     *
+     * By default, PsySH will use the file with highest precedence, and will
+     * silently ignore all others. With this enabled, a warning will be emitted
+     * (but not an exception thrown) if multiple configuration or data files
+     * are found.
+     *
+     * This will default to true in a future release, but is false for now.
+     *
+     * @return bool
+     */
+    public function warnOnMultipleConfigs()
+    {
+        return $this->warnOnMultipleConfigs;
+    }
+
+    /**
+     * Set the current color mode.
+     *
+     * @param string $colorMode
+     */
+    public function setColorMode($colorMode)
+    {
+        $validColorModes = [
+            self::COLOR_MODE_AUTO,
+            self::COLOR_MODE_FORCED,
+            self::COLOR_MODE_DISABLED,
+        ];
+
+        if (in_array($colorMode, $validColorModes)) {
+            $this->colorMode = $colorMode;
+        } else {
+            throw new \InvalidArgumentException('invalid color mode: ' . $colorMode);
+        }
+    }
+
+    /**
+     * Get the current color mode.
+     *
+     * @return string
+     */
+    public function colorMode()
+    {
+        return $this->colorMode;
+    }
+
+    /**
+     * Set an update checker service instance.
+     *
+     * @param Checker $checker
+     */
+    public function setChecker(Checker $checker)
+    {
+        $this->checker = $checker;
+    }
+
+    /**
+     * Get an update checker service instance.
+     *
+     * If none has been explicitly defined, this will create a new instance.
+     *
+     * @return Checker
+     */
+    public function getChecker()
+    {
+        if (!isset($this->checker)) {
+            $interval = $this->getUpdateCheck();
+            switch ($interval) {
+                case Checker::ALWAYS:
+                    $this->checker = new GitHubChecker();
+                    break;
+
+                case Checker::DAILY:
+                case Checker::WEEKLY:
+                case Checker::MONTHLY:
+                    $checkFile = $this->getUpdateCheckCacheFile();
+                    if ($checkFile === false) {
+                        $this->checker = new NoopChecker();
+                    } else {
+                        $this->checker = new IntervalChecker($checkFile, $interval);
+                    }
+                    break;
+
+                case Checker::NEVER:
+                    $this->checker = new NoopChecker();
+                    break;
+            }
+        }
+
+        return $this->checker;
+    }
+
+    /**
+     * Get the current update check interval.
+     *
+     * One of 'always', 'daily', 'weekly', 'monthly' or 'never'. If none is
+     * explicitly set, default to 'weekly'.
+     *
+     * @return string
+     */
+    public function getUpdateCheck()
+    {
+        return isset($this->updateCheck) ? $this->updateCheck : Checker::WEEKLY;
+    }
+
+    /**
+     * Set the update check interval.
+     *
+     * @throws \InvalidArgumentDescription if the update check interval is unknown
+     *
+     * @param string $interval
+     */
+    public function setUpdateCheck($interval)
+    {
+        $validIntervals = [
+            Checker::ALWAYS,
+            Checker::DAILY,
+            Checker::WEEKLY,
+            Checker::MONTHLY,
+            Checker::NEVER,
+        ];
+
+        if (!in_array($interval, $validIntervals)) {
+            throw new \InvalidArgumentException('invalid update check interval: ' . $interval);
+        }
+
+        $this->updateCheck = $interval;
+    }
+
+    /**
+     * Get a cache file path for the update checker.
+     *
+     * @return string|false Return false if config file/directory is not writable
+     */
+    public function getUpdateCheckCacheFile()
+    {
+        $dir = $this->configDir ?: ConfigPaths::getCurrentConfigDir();
+
+        return ConfigPaths::touchFileWithMkdir($dir . '/update_check.json');
+    }
+
+    /**
+     * Set the startup message.
+     *
+     * @param string $message
+     */
+    public function setStartupMessage($message)
+    {
+        $this->startupMessage = $message;
+    }
+
+    /**
+     * Get the startup message.
+     *
+     * @return string|null
+     */
+    public function getStartupMessage()
+    {
+        return $this->startupMessage;
+    }
+
+    /**
+     * Set the prompt.
+     *
+     * @param string $prompt
+     */
+    public function setPrompt($prompt)
+    {
+        $this->prompt = $prompt;
+    }
+
+    /**
+     * Get the prompt.
+     *
+     * @return string
+     */
+    public function getPrompt()
+    {
+        return $this->prompt;
+    }
+
+    /**
+     * Get the force array indexes.
+     *
+     * @return bool
+     */
+    public function forceArrayIndexes()
+    {
+        return $this->forceArrayIndexes;
+    }
+
+    /**
+     * Set the force array indexes.
+     *
+     * @param bool $forceArrayIndexes
+     */
+    public function setForceArrayIndexes($forceArrayIndexes)
+    {
+        $this->forceArrayIndexes = $forceArrayIndexes;
+    }
+}