<?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;
use Psy\CodeCleaner\NoReturnValue;
use Psy\Exception\BreakException;
use Psy\Exception\ErrorException;
use Psy\Exception\Exception as PsyException;
use Psy\Exception\ThrowUpException;
use Psy\Exception\TypeErrorException;
use Psy\ExecutionLoop\ProcessForker;
use Psy\ExecutionLoop\RunkitReloader;
use Psy\Formatter\TraceFormatter;
use Psy\Input\ShellInput;
use Psy\Input\SilentInput;
use Psy\TabCompletion\Matcher;
use Psy\VarDumper\PresenterAware;
use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command as BaseCommand;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\StringInput;
use Symfony\Component\Console\Output\ConsoleOutput;
use Symfony\Component\Console\Output\OutputInterface;
/**
* The Psy Shell application.
*
* Usage:
*
* $shell = new Shell;
* $shell->run();
*
* @author Justin Hileman <justin@justinhileman.info>
*/
class Shell extends Application
{
const VERSION = 'v0.10.4';
const PROMPT = '>>> ';
const BUFF_PROMPT = '... ';
const REPLAY = '--> ';
const RETVAL = '=> ';
private $config;
private $cleaner;
private $output;
private $originalVerbosity;
private $readline;
private $inputBuffer;
private $code;
private $codeBuffer;
private $codeBufferOpen;
private $codeStack;
private $stdoutBuffer;
private $context;
private $includes;
private $outputWantsNewline = false;
private $loopListeners;
private $autoCompleter;
private $matchers = [];
private $commandsMatcher;
private $lastExecSuccess = true;
/**
* Create a new Psy Shell.
*
* @param Configuration|null $config (default: null)
*/
public function __construct(Configuration $config = null)
{
$this->config = $config ?: new Configuration();
$this->cleaner = $this->config->getCodeCleaner();
$this->context = new Context();
$this->includes = [];
$this->readline = $this->config->getReadline();
$this->inputBuffer = [];
$this->codeStack = [];
$this->stdoutBuffer = '';
$this->loopListeners = $this->getDefaultLoopListeners();
parent::__construct('Psy Shell', self::VERSION);
$this->config->setShell($this);
// Register the current shell session's config with \Psy\info
\Psy\info($this->config);
}
/**
* Check whether the first thing in a backtrace is an include call.
*
* This is used by the psysh bin to decide whether to start a shell on boot,
* or to simply autoload the library.
*/
public static function isIncluded(array $trace)
{
return isset($trace[0]['function']) &&
\in_array($trace[0]['function'], ['require', 'include', 'require_once', 'include_once']);
}
/**
* Invoke a Psy Shell from the current context.
*
* @see Psy\debug
* @deprecated will be removed in 1.0. Use \Psy\debug instead
*
* @param array $vars Scope variables from the calling context (default: [])
* @param object|string $bindTo Bound object ($this) or class (self) value for the shell
*
* @return array Scope variables from the debugger session
*/
public static function debug(array $vars = [], $bindTo = null)
{
return \Psy\debug($vars, $bindTo);
}
/**
* Adds a command object.
*
* {@inheritdoc}
*
* @param BaseCommand $command A Symfony Console Command object
*
* @return BaseCommand The registered command
*/
public function add(BaseCommand $command)
{
if ($ret = parent::add($command)) {
if ($ret instanceof ContextAware) {
$ret->setContext($this->context);
}
if ($ret instanceof PresenterAware) {
$ret->setPresenter($this->config->getPresenter());
}
if (isset($this->commandsMatcher)) {
$this->commandsMatcher->setCommands($this->all());
}
}
return $ret;
}
/**
* Gets the default input definition.
*
* @return InputDefinition An InputDefinition instance
*/
protected function getDefaultInputDefinition()
{
return new InputDefinition([
new InputArgument('command', InputArgument::REQUIRED, 'The command to execute'),
new InputOption('--help', '-h', InputOption::VALUE_NONE, 'Display this help message.'),
]);
}
/**
* Gets the default commands that should always be available.
*
* @return array An array of default Command instances
*/
protected function getDefaultCommands()
{
$sudo = new Command\SudoCommand();
$sudo->setReadline($this->readline);
$hist = new Command\HistoryCommand();
$hist->setReadline($this->readline);
return [
new Command\HelpCommand(),
new Command\ListCommand(),
new Command\DumpCommand(),
new Command\DocCommand(),
new Command\ShowCommand(),
new Command\WtfCommand(),
new Command\WhereamiCommand(),
new Command\ThrowUpCommand(),
new Command\TimeitCommand(),
new Command\TraceCommand(),
new Command\BufferCommand(),
new Command\ClearCommand(),
new Command\EditCommand($this->config->getRuntimeDir()),
// new Command\PsyVersionCommand(),
$sudo,
$hist,
new Command\ExitCommand(),
];
}
/**
* @return array
*/
protected function getDefaultMatchers()
{
// Store the Commands Matcher for later. If more commands are added,
// we'll update the Commands Matcher too.
$this->commandsMatcher = new Matcher\CommandsMatcher($this->all());
return [
$this->commandsMatcher,
new Matcher\KeywordsMatcher(),
new Matcher\VariablesMatcher(),
new Matcher\ConstantsMatcher(),
new Matcher\FunctionsMatcher(),
new Matcher\ClassNamesMatcher(),
new Matcher\ClassMethodsMatcher(),
new Matcher\ClassAttributesMatcher(),
new Matcher\ObjectMethodsMatcher(),
new Matcher\ObjectAttributesMatcher(),
new Matcher\ClassMethodDefaultParametersMatcher(),
new Matcher\ObjectMethodDefaultParametersMatcher(),
new Matcher\FunctionDefaultParametersMatcher(),
];
}
/**
* @deprecated Nothing should use this anymore
*/
protected function getTabCompletionMatchers()
{
@\trigger_error('getTabCompletionMatchers is no longer used', E_USER_DEPRECATED);
}
/**
* Gets the default command loop listeners.
*
* @return array An array of Execution Loop Listener instances
*/
protected function getDefaultLoopListeners()
{
$listeners = [];
if (ProcessForker::isSupported() && $this->config->usePcntl()) {
$listeners[] = new ProcessForker();
}
if (RunkitReloader::isSupported()) {
$listeners[] = new RunkitReloader();
}
return $listeners;
}
/**
* Add tab completion matchers.
*
* @param array $matchers
*/
public function addMatchers(array $matchers)
{
$this->matchers = \array_merge($this->matchers, $matchers);
if (isset($this->autoCompleter)) {
$this->addMatchersToAutoCompleter($matchers);
}
}
/**
* @deprecated Call `addMatchers` instead
*
* @param array $matchers
*/
public function addTabCompletionMatchers(array $matchers)
{
$this->addMatchers($matchers);
}
/**
* Set the Shell output.
*
* @param OutputInterface $output
*/
public function setOutput(OutputInterface $output)
{
$this->output = $output;
$this->originalVerbosity = $output->getVerbosity();
}
/**
* Runs PsySH.
*
* @param InputInterface|null $input An Input instance
* @param OutputInterface|null $output An Output instance
*
* @return int 0 if everything went fine, or an error code
*/
public function run(InputInterface $input = null, OutputInterface $output = null)
{
// We'll just ignore the input passed in, and set up our own!
$input = new ArrayInput([]);
if ($output === null) {
$output = $this->config->getOutput();
}
$this->setAutoExit(false);
$this->setCatchExceptions(false);
try {
return parent::run($input, $output);
} catch (\Exception $e) {
$this->writeException($e);
}
return 1;
}
/**
* Runs PsySH.
*
* @throws \Exception if thrown via the `throw-up` command
*
* @param InputInterface $input An Input instance
* @param OutputInterface $output An Output instance
*
* @return int 0 if everything went fine, or an error code
*/
public function doRun(InputInterface $input, OutputInterface $output)
{
$this->setOutput($output);
$this->resetCodeBuffer();
if ($input->isInteractive()) {
// @todo should it be possible to have raw output in an interactive run?
return $this->doInteractiveRun();
} else {
return $this->doNonInteractiveRun($this->config->rawOutput());
}
}
/**
* Run PsySH in interactive mode.
*
* Initializes tab completion and readline history, then spins up the
* execution loop.
*
* @throws \Exception if thrown via the `throw-up` command
*
* @return int 0 if everything went fine, or an error code
*/
private function doInteractiveRun()
{
$this->initializeTabCompletion();
$this->readline->readHistory();
$this->output->writeln($this->getHeader());
$this->writeVersionInfo();
$this->writeStartupMessage();
try {
$this->beforeRun();
$this->loadIncludes();
$loop = new ExecutionLoopClosure($this);
$loop->execute();
$this->afterRun();
} catch (ThrowUpException $e) {
throw $e->getPrevious();
} catch (BreakException $e) {
// The ProcessForker throws a BreakException to finish the main thread.
}
return 0;
}
/**
* Run PsySH in non-interactive mode.
*
* Note that this isn't very useful unless you supply "include" arguments at
* the command line, or code via stdin.
*
* @param bool $rawOutput
*
* @return int 0 if everything went fine, or an error code
*/
private function doNonInteractiveRun($rawOutput)
{
// If raw output is enabled (or output is piped) we don't want startup messages.
if (!$rawOutput && !$this->config->outputIsPiped()) {
$this->output->writeln($this->getHeader());
$this->writeVersionInfo();
$this->writeStartupMessage();
}
$this->beforeRun();
$this->loadIncludes();
// For non-interactive execution, read only from the input buffer or from piped input.
// Otherwise it'll try to readline and hang, waiting for user input with no indication of
// what's holding things up.
if (!empty($this->inputBuffer) || $this->config->inputIsPiped()) {
$this->getInput(false);
}
if ($this->hasCode()) {
$ret = $this->execute($this->flushCode());
$this->writeReturnValue($ret, $rawOutput);
}
$this->afterRun();
return 0;
}
/**
* Configures the input and output instances based on the user arguments and options.
*/
protected function configureIO(InputInterface $input, OutputInterface $output)
{
// @todo overrides via environment variables (or should these happen in config? ... probably config)
$input->setInteractive($this->config->getInputInteractive());
if ($this->config->getOutputDecorated() !== null) {
$output->setDecorated($this->config->getOutputDecorated());
}
$output->setVerbosity($this->config->getOutputVerbosity());
}
/**
* Load user-defined includes.
*/
private function loadIncludes()
{
// Load user-defined includes
$load = function (self $__psysh__) {
\set_error_handler([$__psysh__, 'handleError']);
foreach ($__psysh__->getIncludes() as $__psysh_include__) {
try {
include $__psysh_include__;
} catch (\Error $_e) {
$__psysh__->writeException(ErrorException::fromError($_e));
} catch (\Exception $_e) {
$__psysh__->writeException($_e);
}
}
\restore_error_handler();
unset($__psysh_include__);
// Override any new local variables with pre-defined scope variables
\extract($__psysh__->getScopeVariables(false));
// ... then add the whole mess of variables back.
$__psysh__->setScopeVariables(\get_defined_vars());
};
$load($this);
}
/**
* Read user input.
*
* This will continue fetching user input until the code buffer contains
* valid code.
*
* @throws BreakException if user hits Ctrl+D
*
* @param bool $interactive
*/
public function getInput($interactive = true)
{
$this->codeBufferOpen = false;
do {
// reset output verbosity (in case it was altered by a subcommand)
$this->output->setVerbosity($this->originalVerbosity);
$input = $this->readline();
/*
* Handle Ctrl+D. It behaves differently in different cases:
*
* 1) In an expression, like a function or "if" block, clear the input buffer
* 2) At top-level session, behave like the exit command
* 3) When non-interactive, return, because that's the end of stdin
*/
if ($input === false) {
if (!$interactive) {
return;
}
$this->output->writeln('');
if ($this->hasCode()) {
$this->resetCodeBuffer();
} else {
throw new BreakException('Ctrl+D');
}
}
// handle empty input
if (\trim($input) === '' && !$this->codeBufferOpen) {
continue;
}
$input = $this->onInput($input);
// If the input isn't in an open string or comment, check for commands to run.
if ($this->hasCommand($input) && !$this->inputInOpenStringOrComment($input)) {
$this->addHistory($input);
$this->runCommand($input);
continue;
}
$this->addCode($input);
} while (!$interactive || !$this->hasValidCode());
}
/**
* Check whether the code buffer (plus current input) is in an open string or comment.
*
* @param string $input current line of input
*
* @return bool true if the input is in an open string or comment
*/
private function inputInOpenStringOrComment($input)
{
if (!$this->hasCode()) {
return false;
}
$code = $this->codeBuffer;
\array_push($code, $input);
$tokens = @\token_get_all('<?php ' . \implode("\n", $code));
$last = \array_pop($tokens);
return $last === '"' || $last === '`' ||
(\is_array($last) && \in_array($last[0], [T_ENCAPSED_AND_WHITESPACE, T_START_HEREDOC, T_COMMENT]));
}
/**
* Run execution loop listeners before the shell session.
*/
protected function beforeRun()
{
foreach ($this->loopListeners as $listener) {
$listener->beforeRun($this);
}
}
/**
* Run execution loop listeners at the start of each loop.
*/
public function beforeLoop()
{
foreach ($this->loopListeners as $listener) {
$listener->beforeLoop($this);
}
}
/**
* Run execution loop listeners on user input.
*
* @param string $input
*
* @return string
*/
public function onInput($input)
{
foreach ($this->loopListeners as $listeners) {
if (($return = $listeners->onInput($this, $input)) !== null) {
$input = $return;
}
}
return $input;
}
/**
* Run execution loop listeners on code to be executed.
*
* @param string $code
*
* @return string
*/
public function onExecute($code)
{
foreach ($this->loopListeners as $listener) {
if (($return = $listener->onExecute($this, $code)) !== null) {
$code = $return;
}
}
return $code;
}
/**
* Run execution loop listeners after each loop.
*/
public function afterLoop()
{
foreach ($this->loopListeners as $listener) {
$listener->afterLoop($this);
}
}
/**
* Run execution loop listers after the shell session.
*/
protected function afterRun()
{
foreach ($this->loopListeners as $listener) {
$listener->afterRun($this);
}
}
/**
* Set the variables currently in scope.
*
* @param array $vars
*/
public function setScopeVariables(array $vars)
{
$this->context->setAll($vars);
}
/**
* Return the set of variables currently in scope.
*
* @param bool $includeBoundObject Pass false to exclude 'this'. If you're
* passing the scope variables to `extract`
* in PHP 7.1+, you _must_ exclude 'this'
*
* @return array Associative array of scope variables
*/
public function getScopeVariables($includeBoundObject = true)
{
$vars = $this->context->getAll();
if (!$includeBoundObject) {
unset($vars['this']);
}
return $vars;
}
/**
* Return the set of magic variables currently in scope.
*
* @param bool $includeBoundObject Pass false to exclude 'this'. If you're
* passing the scope variables to `extract`
* in PHP 7.1+, you _must_ exclude 'this'
*
* @return array Associative array of magic scope variables
*/
public function getSpecialScopeVariables($includeBoundObject = true)
{
$vars = $this->context->getSpecialVariables();
if (!$includeBoundObject) {
unset($vars['this']);
}
return $vars;
}
/**
* Return the set of variables currently in scope which differ from the
* values passed as $currentVars.
*
* This is used inside the Execution Loop Closure to pick up scope variable
* changes made by commands while the loop is running.
*
* @param array $currentVars
*
* @return array Associative array of scope variables which differ from $currentVars
*/
public function getScopeVariablesDiff(array $currentVars)
{
$newVars = [];
foreach ($this->getScopeVariables(false) as $key => $value) {
if (!array_key_exists($key, $currentVars) || $currentVars[$key] !== $value) {
$newVars[$key] = $value;
}
}
return $newVars;
}
/**
* Get the set of unused command-scope variable names.
*
* @return array Array of unused variable names
*/
public function getUnusedCommandScopeVariableNames()
{
return $this->context->getUnusedCommandScopeVariableNames();
}
/**
* Get the set of variable names currently in scope.
*
* @return array Array of variable names
*/
public function getScopeVariableNames()
{
return \array_keys($this->context->getAll());
}
/**
* Get a scope variable value by name.
*
* @param string $name
*
* @return mixed
*/
public function getScopeVariable($name)
{
return $this->context->get($name);
}
/**
* Set the bound object ($this variable) for the interactive shell.
*
* @param object|null $boundObject
*/
public function setBoundObject($boundObject)
{
$this->context->setBoundObject($boundObject);
}
/**
* Get the bound object ($this variable) for the interactive shell.
*
* @return object|null
*/
public function getBoundObject()
{
return $this->context->getBoundObject();
}
/**
* Set the bound class (self) for the interactive shell.
*
* @param string|null $boundClass
*/
public function setBoundClass($boundClass)
{
$this->context->setBoundClass($boundClass);
}
/**
* Get the bound class (self) for the interactive shell.
*
* @return string|null
*/
public function getBoundClass()
{
return $this->context->getBoundClass();
}
/**
* Add includes, to be parsed and executed before running the interactive shell.
*
* @param array $includes
*/
public function setIncludes(array $includes = [])
{
$this->includes = $includes;
}
/**
* Get PHP files to be parsed and executed before running the interactive shell.
*
* @return array
*/
public function getIncludes()
{
return \array_merge($this->config->getDefaultIncludes(), $this->includes);
}
/**
* Check whether this shell's code buffer contains code.
*
* @return bool True if the code buffer contains code
*/
public function hasCode()
{
return !empty($this->codeBuffer);
}
/**
* Check whether the code in this shell's code buffer is valid.
*
* If the code is valid, the code buffer should be flushed and evaluated.
*
* @return bool True if the code buffer content is valid
*/
protected function hasValidCode()
{
return !$this->codeBufferOpen && $this->code !== false;
}
/**
* Add code to the code buffer.
*
* @param string $code
* @param bool $silent
*/
public function addCode($code, $silent = false)
{
try {
// Code lines ending in \ keep the buffer open
if (\substr(\rtrim($code), -1) === '\\') {
$this->codeBufferOpen = true;
$code = \substr(\rtrim($code), 0, -1);
} else {
$this->codeBufferOpen = false;
}
$this->codeBuffer[] = $silent ? new SilentInput($code) : $code;
$this->code = $this->cleaner->clean($this->codeBuffer, $this->config->requireSemicolons());
} catch (\Exception $e) {
// Add failed code blocks to the readline history.
$this->addCodeBufferToHistory();
throw $e;
}
}
/**
* Set the code buffer.
*
* This is mostly used by `Shell::execute`. Any existing code in the input
* buffer is pushed onto a stack and will come back after this new code is
* executed.
*
* @throws \InvalidArgumentException if $code isn't a complete statement
*
* @param string $code
* @param bool $silent
*/
private function setCode($code, $silent = false)
{
if ($this->hasCode()) {
$this->codeStack[] = [$this->codeBuffer, $this->codeBufferOpen, $this->code];
}
$this->resetCodeBuffer();
try {
$this->addCode($code, $silent);
} catch (\Throwable $e) {
$this->popCodeStack();
throw $e;
} catch (\Exception $e) {
$this->popCodeStack();
throw $e;
}
if (!$this->hasValidCode()) {
$this->popCodeStack();
throw new \InvalidArgumentException('Unexpected end of input');
}
}
/**
* Get the current code buffer.
*
* This is useful for commands which manipulate the buffer.
*
* @return array
*/
public function getCodeBuffer()
{
return $this->codeBuffer;
}
/**
* Run a Psy Shell command given the user input.
*
* @throws \InvalidArgumentException if the input is not a valid command
*
* @param string $input User input string
*
* @return mixed Who knows?
*/
protected function runCommand($input)
{
$command = $this->getCommand($input);
if (empty($command)) {
throw new \InvalidArgumentException('Command not found: ' . $input);
}
$input = new ShellInput(\str_replace('\\', '\\\\', \rtrim($input, " \t\n\r\0\x0B;")));
if ($input->hasParameterOption(['--help', '-h'])) {
$helpCommand = $this->get('help');
$helpCommand->setCommand($command);
return $helpCommand->run(new StringInput(''), $this->output);
}
return $command->run($input, $this->output);
}
/**
* Reset the current code buffer.
*
* This should be run after evaluating user input, catching exceptions, or
* on demand by commands such as BufferCommand.
*/
public function resetCodeBuffer()
{
$this->codeBuffer = [];
$this->code = false;
}
/**
* Inject input into the input buffer.
*
* This is useful for commands which want to replay history.
*
* @param string|array $input
* @param bool $silent
*/
public function addInput($input, $silent = false)
{
foreach ((array) $input as $line) {
$this->inputBuffer[] = $silent ? new SilentInput($line) : $line;
}
}
/**
* Flush the current (valid) code buffer.
*
* If the code buffer is valid, resets the code buffer and returns the
* current code.
*
* @return string PHP code buffer contents
*/
public function flushCode()
{
if ($this->hasValidCode()) {
$this->addCodeBufferToHistory();
$code = $this->code;
$this->popCodeStack();
return $code;
}
}
/**
* Reset the code buffer and restore any code pushed during `execute` calls.
*/
private function popCodeStack()
{
$this->resetCodeBuffer();
if (empty($this->codeStack)) {
return;
}
list($codeBuffer, $codeBufferOpen, $code) = \array_pop($this->codeStack);
$this->codeBuffer = $codeBuffer;
$this->codeBufferOpen = $codeBufferOpen;
$this->code = $code;
}
/**
* (Possibly) add a line to the readline history.
*
* Like Bash, if the line starts with a space character, it will be omitted
* from history. Note that an entire block multi-line code input will be
* omitted iff the first line begins with a space.
*
* Additionally, if a line is "silent", i.e. it was initially added with the
* silent flag, it will also be omitted.
*
* @param string|SilentInput $line
*/
private function addHistory($line)
{
if ($line instanceof SilentInput) {
return;
}
// Skip empty lines and lines starting with a space
if (\trim($line) !== '' && \substr($line, 0, 1) !== ' ') {
$this->readline->addHistory($line);
}
}
/**
* Filter silent input from code buffer, write the rest to readline history.
*/
private function addCodeBufferToHistory()
{
$codeBuffer = \array_filter($this->codeBuffer, function ($line) {
return !$line instanceof SilentInput;
});
$this->addHistory(\implode("\n", $codeBuffer));
}
/**
* Get the current evaluation scope namespace.
*
* @see CodeCleaner::getNamespace
*
* @return string Current code namespace
*/
public function getNamespace()
{
if ($namespace = $this->cleaner->getNamespace()) {
return \implode('\\', $namespace);
}
}
/**
* Write a string to stdout.
*
* This is used by the shell loop for rendering output from evaluated code.
*
* @param string $out
* @param int $phase Output buffering phase
*/
public function writeStdout($out, $phase = PHP_OUTPUT_HANDLER_END)
{
$isCleaning = $phase & PHP_OUTPUT_HANDLER_CLEAN;
// Incremental flush
if ($out !== '' && !$isCleaning) {
$this->output->write($out, false, OutputInterface::OUTPUT_RAW);
$this->outputWantsNewline = (\substr($out, -1) !== "\n");
$this->stdoutBuffer .= $out;
}
// Output buffering is done!
if ($phase & PHP_OUTPUT_HANDLER_END) {
// Write an extra newline if stdout didn't end with one
if ($this->outputWantsNewline) {
if (!$this->config->rawOutput() && !$this->config->outputIsPiped()) {
$this->output->writeln(\sprintf('<aside>%s</aside>', $this->config->useUnicode() ? '⏎' : '\\n'));
} else {
$this->output->writeln('');
}
$this->outputWantsNewline = false;
}
// Save the stdout buffer as $__out
if ($this->stdoutBuffer !== '') {
$this->context->setLastStdout($this->stdoutBuffer);
$this->stdoutBuffer = '';
}
}
}
/**
* Write a return value to stdout.
*
* The return value is formatted or pretty-printed, and rendered in a
* visibly distinct manner (in this case, as cyan).
*
* @see self::presentValue
*
* @param mixed $ret
* @param bool $rawOutput Write raw var_export-style values
*/
public function writeReturnValue($ret, $rawOutput = false)
{
$this->lastExecSuccess = true;
if ($ret instanceof NoReturnValue) {
return;
}
$this->context->setReturnValue($ret);
if ($rawOutput) {
$formatted = \var_export($ret, true);
} else {
$indent = \str_repeat(' ', \strlen(static::RETVAL));
$formatted = $this->presentValue($ret);
$formatted = static::RETVAL . \str_replace(PHP_EOL, PHP_EOL . $indent, $formatted);
}
$this->output->writeln($formatted);
}
/**
* Renders a caught Exception.
*
* Exceptions are formatted according to severity. ErrorExceptions which were
* warnings or Strict errors aren't rendered as harshly as real errors.
*
* Stores $e as the last Exception in the Shell Context.
*
* @param \Exception $e An exception instance
*/
public function writeException(\Exception $e)
{
$this->lastExecSuccess = false;
$this->context->setLastException($e);
$output = $this->output;
if ($output instanceof ConsoleOutput) {
$output = $output->getErrorOutput();
}
$output->writeln($this->formatException($e));
// Include an exception trace (as long as this isn't a BreakException).
if (!$e instanceof BreakException && $output->getVerbosity() >= OutputInterface::VERBOSITY_VERBOSE) {
$trace = TraceFormatter::formatTrace($e);
if (\count($trace) !== 0) {
$output->writeln('--');
$output->write($trace, true);
$output->writeln('');
}
}
$this->resetCodeBuffer();
}
/**
* Check whether the last exec was successful.
*
* Returns true if a return value was logged rather than an exception.
*
* @return bool
*/
public function getLastExecSuccess()
{
return $this->lastExecSuccess;
}
/**
* Helper for formatting an exception for writeException().
*
* @todo extract this to somewhere it makes more sense
*
* @param \Exception $e
*
* @return string
*/
public function formatException(\Exception $e)
{
$message = $e->getMessage();
if (!$e instanceof PsyException) {
if ($message === '') {
$message = \get_class($e);
} else {
$message = \sprintf('%s with message \'%s\'', \get_class($e), $message);
}
}
$message = \preg_replace(
"#(\\w:)?(/\\w+)*/src/Execution(?:Loop)?Closure.php\(\d+\) : eval\(\)'d code#",
"eval()'d code",
\str_replace('\\', '/', $message)
);
$message = \str_replace(" in eval()'d code", ' in Psy Shell code', $message);
$severity = ($e instanceof \ErrorException) ? $this->getSeverity($e) : 'error';
return \sprintf('<%s>%s</%s>', $severity, OutputFormatter::escape($message), $severity);
}
/**
* Helper for getting an output style for the given ErrorException's level.
*
* @param \ErrorException $e
*
* @return string
*/
protected function getSeverity(\ErrorException $e)
{
$severity = $e->getSeverity();
if ($severity & \error_reporting()) {
switch ($severity) {
case E_WARNING:
case E_NOTICE:
case E_CORE_WARNING:
case E_COMPILE_WARNING:
case E_USER_WARNING:
case E_USER_NOTICE:
case E_STRICT:
return 'warning';
default:
return 'error';
}
} else {
// Since this is below the user's reporting threshold, it's always going to be a warning.
return 'warning';
}
}
/**
* Execute code in the shell execution context.
*
* @param string $code
* @param bool $throwExceptions
*
* @return mixed
*/
public function execute($code, $throwExceptions = false)
{
$this->setCode($code, true);
$closure = new ExecutionClosure($this);
if ($throwExceptions) {
return $closure->execute();
}
try {
return $closure->execute();
} catch (\TypeError $_e) {
$this->writeException(TypeErrorException::fromTypeError($_e));
} catch (\Error $_e) {
$this->writeException(ErrorException::fromError($_e));
} catch (\Exception $_e) {
$this->writeException($_e);
}
}
/**
* Helper for throwing an ErrorException.
*
* This allows us to:
*
* set_error_handler([$psysh, 'handleError']);
*
* Unlike ErrorException::throwException, this error handler respects error
* levels; i.e. it logs warnings and notices, but doesn't throw exceptions.
* This should probably only be used in the inner execution loop of the
* shell, as most of the time a thrown exception is much more useful.
*
* If the error type matches the `errorLoggingLevel` config, it will be
* logged as well, regardless of the `error_reporting` level.
*
* @see \Psy\Exception\ErrorException::throwException
* @see \Psy\Shell::writeException
*
* @throws \Psy\Exception\ErrorException depending on the error level
*
* @param int $errno Error type
* @param string $errstr Message
* @param string $errfile Filename
* @param int $errline Line number
*/
public function handleError($errno, $errstr, $errfile, $errline)
{
// This is an error worth throwing.
//
// n.b. Technically we can't handle all of these in userland code, but
// we'll list 'em all for good measure
if ($errno & (E_ERROR | E_PARSE | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR | E_RECOVERABLE_ERROR)) {
ErrorException::throwException($errno, $errstr, $errfile, $errline);
}
// Otherwise log it and continue.
if ($errno & \error_reporting() || $errno & $this->config->errorLoggingLevel()) {
$this->writeException(new ErrorException($errstr, 0, $errno, $errfile, $errline));
}
}
/**
* Format a value for display.
*
* @see Presenter::present
*
* @param mixed $val
*
* @return string Formatted value
*/
protected function presentValue($val)
{
return $this->config->getPresenter()->present($val);
}
/**
* Get a command (if one exists) for the current input string.
*
* @param string $input
*
* @return BaseCommand|null
*/
protected function getCommand($input)
{
$input = new StringInput($input);
if ($name = $input->getFirstArgument()) {
return $this->get($name);
}
}
/**
* Check whether a command is set for the current input string.
*
* @param string $input
*
* @return bool True if the shell has a command for the given input
*/
protected function hasCommand($input)
{
if (\preg_match('/([^\s]+?)(?:\s|$)/A', \ltrim($input), $match)) {
return $this->has($match[1]);
}
return false;
}
/**
* Get the current input prompt.
*
* @return string | null
*/
protected function getPrompt()
{
if ($this->output->isQuiet()) {
return null;
}
if ($this->hasCode()) {
return static::BUFF_PROMPT;
}
return $this->config->getPrompt() ?: static::PROMPT;
}
/**
* Read a line of user input.
*
* This will return a line from the input buffer (if any exist). Otherwise,
* it will ask the user for input.
*
* If readline is enabled, this delegates to readline. Otherwise, it's an
* ugly `fgets` call.
*
* @param bool $interactive
*
* @return string One line of user input
*/
protected function readline($interactive = true)
{
if (!empty($this->inputBuffer)) {
$line = \array_shift($this->inputBuffer);
if (!$line instanceof SilentInput) {
$this->output->writeln(\sprintf('<aside>%s %s</aside>', static::REPLAY, OutputFormatter::escape($line)));
}
return $line;
}
$bracketedPaste = $interactive && $this->config->useBracketedPaste();
if ($bracketedPaste) {
\printf("\e[?2004h"); // Enable bracketed paste
}
$line = $this->readline->readline($this->getPrompt());
if ($bracketedPaste) {
\printf("\e[?2004l"); // ... and disable it again
}
return $line;
}
/**
* Get the shell output header.
*
* @return string
*/
protected function getHeader()
{
return \sprintf('<aside>%s by Justin Hileman</aside>', $this->getVersion());
}
/**
* Get the current version of Psy Shell.
*
* @deprecated call self::getVersionHeader instead
*
* @return string
*/
public function getVersion()
{
return self::getVersionHeader($this->config->useUnicode());
}
/**
* Get a pretty header including the current version of Psy Shell.
*
* @param bool $useUnicode
*
* @return string
*/
public static function getVersionHeader($useUnicode = false)
{
$separator = $useUnicode ? '—' : '-';
return \sprintf('Psy Shell %s (PHP %s %s %s)', self::VERSION, PHP_VERSION, $separator, PHP_SAPI);
}
/**
* Get a PHP manual database instance.
*
* @return \PDO|null
*/
public function getManualDb()
{
return $this->config->getManualDb();
}
/**
* @deprecated Tab completion is provided by the AutoCompleter service
*/
protected function autocomplete($text)
{
@\trigger_error('Tab completion is provided by the AutoCompleter service', E_USER_DEPRECATED);
}
/**
* Initialize tab completion matchers.
*
* If tab completion is enabled this adds tab completion matchers to the
* auto completer and sets context if needed.
*/
protected function initializeTabCompletion()
{
if (!$this->config->useTabCompletion()) {
return;
}
$this->autoCompleter = $this->config->getAutoCompleter();
// auto completer needs shell to be linked to configuration because of
// the context aware matchers
$this->addMatchersToAutoCompleter($this->getDefaultMatchers());
$this->addMatchersToAutoCompleter($this->matchers);
$this->autoCompleter->activate();
}
/**
* Add matchers to the auto completer, setting context if needed.
*
* @param array $matchers
*/
private function addMatchersToAutoCompleter(array $matchers)
{
foreach ($matchers as $matcher) {
if ($matcher instanceof ContextAware) {
$matcher->setContext($this->context);
}
$this->autoCompleter->addMatcher($matcher);
}
}
/**
* @todo Implement self-update
* @todo Implement prompt to start update
*
* @return void|string
*/
protected function writeVersionInfo()
{
if (PHP_SAPI !== 'cli') {
return;
}
try {
$client = $this->config->getChecker();
if (!$client->isLatest()) {
$this->output->writeln(\sprintf('New version is available (current: %s, latest: %s)', self::VERSION, $client->getLatest()));
}
} catch (\InvalidArgumentException $e) {
$this->output->writeln($e->getMessage());
}
}
/**
* Write a startup message if set.
*/
protected function writeStartupMessage()
{
$message = $this->config->getStartupMessage();
if ($message !== null && $message !== '') {
$this->output->writeln($message);
}
}
}