晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Command;
use Symfony\Component\Console\Application;
use Symfony\Component\Console\Completion\CompletionInput;
use Symfony\Component\Console\Completion\CompletionSuggestions;
use Symfony\Component\Console\Helper\HelperSet;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
final class LazyCommand extends Command
{
private $command;
private $isEnabled;
public function __construct(string $name, array $aliases, string $description, bool $isHidden, \Closure $commandFactory, ?bool $isEnabled = true)
{
$this->setName($name)
->setAliases($aliases)
->setHidden($isHidden)
->setDescription($description);
$this->command = $commandFactory;
$this->isEnabled = $isEnabled;
}
public function ignoreValidationErrors(): void
{
$this->getCommand()->ignoreValidationErrors();
}
public function setApplication(?Application $application = null): void
{
if ($this->command instanceof parent) {
$this->command->setApplication($application);
}
parent::setApplication($application);
}
public function setHelperSet(HelperSet $helperSet): void
{
if ($this->command instanceof parent) {
$this->command->setHelperSet($helperSet);
}
parent::setHelperSet($helperSet);
}
public function isEnabled(): bool
{
return $this->isEnabled ?? $this->getCommand()->isEnabled();
}
public function run(InputInterface $input, OutputInterface $output): int
{
return $this->getCommand()->run($input, $output);
}
public function complete(CompletionInput $input, CompletionSuggestions $suggestions): void
{
$this->getCommand()->complete($input, $suggestions);
}
/**
* @return $this
*/
public function setCode(callable $code): self
{
$this->getCommand()->setCode($code);
return $this;
}
/**
* @internal
*/
public function mergeApplicationDefinition(bool $mergeArgs = true): void
{
$this->getCommand()->mergeApplicationDefinition($mergeArgs);
}
/**
* @return $this
*/
public function setDefinition($definition): self
{
$this->getCommand()->setDefinition($definition);
return $this;
}
public function getDefinition(): InputDefinition
{
return $this->getCommand()->getDefinition();
}
public function getNativeDefinition(): InputDefinition
{
return $this->getCommand()->getNativeDefinition();
}
/**
* @return $this
*/
public function addArgument(string $name, ?int $mode = null, string $description = '', $default = null): self
{
$this->getCommand()->addArgument($name, $mode, $description, $default);
return $this;
}
/**
* @return $this
*/
public function addOption(string $name, $shortcut = null, ?int $mode = null, string $description = '', $default = null): self
{
$this->getCommand()->addOption($name, $shortcut, $mode, $description, $default);
return $this;
}
/**
* @return $this
*/
public function setProcessTitle(string $title): self
{
$this->getCommand()->setProcessTitle($title);
return $this;
}
/**
* @return $this
*/
public function setHelp(string $help): self
{
$this->getCommand()->setHelp($help);
return $this;
}
public function getHelp(): string
{
return $this->getCommand()->getHelp();
}
public function getProcessedHelp(): string
{
return $this->getCommand()->getProcessedHelp();
}
public function getSynopsis(bool $short = false): string
{
return $this->getCommand()->getSynopsis($short);
}
/**
* @return $this
*/
public function addUsage(string $usage): self
{
$this->getCommand()->addUsage($usage);
return $this;
}
public function getUsages(): array
{
return $this->getCommand()->getUsages();
}
/**
* @return mixed
*/
public function getHelper(string $name)
{
return $this->getCommand()->getHelper($name);
}
public function getCommand(): parent
{
if (!$this->command instanceof \Closure) {
return $this->command;
}
$command = $this->command = ($this->command)();
$command->setApplication($this->getApplication());
if (null !== $this->getHelperSet()) {
$command->setHelperSet($this->getHelperSet());
}
$command->setName($this->getName())
->setAliases($this->getAliases())
->setHidden($this->isHidden())
->setDescription($this->getDescription());
// Will throw if the command is not correctly initialized.
$command->getDefinition();
return $command;
}
}