CommandException.php
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	<?php

	/**
	* Exception thrown when a system command fails.
	*/
	final class CommandException extends Exception {

	protected $command;
	protected $stdout;
	protected $stderr;
	protected $error;

	public function __construct($message, $command, $error, $stdout, $stderr) {
	$this->command = $command;
	$this->error = $error;
	$this->stdout = $stdout;
	$this->stderr = $stderr;

	$summary = array();
	$summary[] = $this->summarize($message);

	$summary[] = 'COMMAND';
	$summary[] = $this->summarize($command);

	$summary[] = null;
	$summary[] = 'STDOUT';
	$summary[] = $this->summarize($stdout);

	$summary[] = null;
	$summary[] = 'STDERR';
	$summary[] = $this->summarize($stderr);

	$summary = implode("\n", $summary);

	parent::__construct($summary);
	}

	public function getCommand() {
	return $this->command;
	}

	public function getError() {
	return $this->error;
	}

	public function getStdout() {
	return $this->stdout;
	}

	public function getStderr() {
	return $this->stderr;
	}

	private function summarize($string) {
	if (!strlen($string)) {
	return '(empty)';
	}

	$limit = 1000;

	$len = strlen($string);
	if ($len > $limit) {
	$cut = $len - $limit;
	$suffix = pht('... (%d more bytes) ...', number_format($cut));
	if ($cut > strlen($suffix)) {
	$string = substr($string, 0, $limit).$suffix;
	}
	}

	// Strip out any credentials for the purpose of building a human readable
	// summary of the exception, since these are rarely-if-ever useful when
	// debugging, but can expose otherwise sensitive information.
	$string = phutil_censor_credentials($string);

	return $string;
	}

	}