<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Command;
use Psy\Context;
use Psy\ContextAware;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
class EditCommand extends Command implements ContextAware
{
/**
* @var string
*/
private $runtimeDir = '';
/**
* @var Context
*/
private $context;
/**
* Constructor.
*
* @param string $runtimeDir The directory to use for temporary files
* @param string|null $name The name of the command; passing null means it must be set in configure()
*
* @throws \Symfony\Component\Console\Exception\LogicException When the command name is empty
*/
public function __construct($runtimeDir, $name = null)
{
parent::__construct($name);
$this->runtimeDir = $runtimeDir;
}
protected function configure()
{
$this
->setName('edit')
->setDefinition([
new InputArgument('file', InputArgument::OPTIONAL, 'The file to open for editing. If this is not given, edits a temporary file.', null),
new InputOption(
'exec',
'e',
InputOption::VALUE_NONE,
'Execute the file content after editing. This is the default when a file name argument is not given.',
null
),
new InputOption(
'no-exec',
'E',
InputOption::VALUE_NONE,
'Do not execute the file content after editing. This is the default when a file name argument is given.',
null
),
])
->setDescription('Open an external editor. Afterwards, get produced code in input buffer.')
->setHelp('Set the EDITOR environment variable to something you\'d like to use.');
}
/**
* @param InputInterface $input
* @param OutputInterface $output
*
* @return int 0 if everything went fine, or an exit code
*
* @throws \InvalidArgumentException when both exec and no-exec flags are given or if a given variable is not found in the current context
* @throws \UnexpectedValueException if file_get_contents on the edited file returns false instead of a string
*/
protected function execute(InputInterface $input, OutputInterface $output): int
{
if ($input->getOption('exec') &&
$input->getOption('no-exec')) {
throw new \InvalidArgumentException('The --exec and --no-exec flags are mutually exclusive');
}
$filePath = $this->extractFilePath($input->getArgument('file'));
$execute = $this->shouldExecuteFile(
$input->getOption('exec'),
$input->getOption('no-exec'),
$filePath
);
$shouldRemoveFile = false;
if ($filePath === null) {
$filePath = \tempnam($this->runtimeDir, 'psysh-edit-command');
$shouldRemoveFile = true;
}
$editedContent = $this->editFile($filePath, $shouldRemoveFile);
if ($execute) {
$this->getApplication()->addInput($editedContent);
}
return 0;
}
/**
* @param bool $execOption
* @param bool $noExecOption
* @param string|null $filePath
*/
private function shouldExecuteFile(bool $execOption, bool $noExecOption, ?string $filePath = null): bool
{
if ($execOption) {
return true;
}
if ($noExecOption) {
return false;
}
// By default, code that is edited is executed if there was no given input file path
return $filePath === null;
}
/**
* @param string|null $fileArgument
*
* @return string|null The file path to edit, null if the input was null, or the value of the referenced variable
*
* @throws \InvalidArgumentException If the variable is not found in the current context
*/
private function extractFilePath(?string $fileArgument = null)
{
// If the file argument was a variable, get it from the context
if ($fileArgument !== null &&
$fileArgument !== '' &&
$fileArgument[0] === '$') {
$fileArgument = $this->context->get(\preg_replace('/^\$/', '', $fileArgument));
}
return $fileArgument;
}
/**
* @param string $filePath
* @param bool $shouldRemoveFile
*
* @throws \UnexpectedValueException if file_get_contents on $filePath returns false instead of a string
*/
private function editFile(string $filePath, bool $shouldRemoveFile): string
{
$escapedFilePath = \escapeshellarg($filePath);
$editor = (isset($_SERVER['EDITOR']) && $_SERVER['EDITOR']) ? $_SERVER['EDITOR'] : 'nano';
$pipes = [];
$proc = \proc_open("{$editor} {$escapedFilePath}", [\STDIN, \STDOUT, \STDERR], $pipes);
\proc_close($proc);
$editedContent = @\file_get_contents($filePath);
if ($shouldRemoveFile) {
@\unlink($filePath);
}
if ($editedContent === false) {
throw new \UnexpectedValueException("Reading {$filePath} returned false");
}
return $editedContent;
}
/**
* Set the Context reference.
*
* @param Context $context
*/
public function setContext(Context $context)
{
$this->context = $context;
}
}
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