PhutilConsoleFormatter.php
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	<?php

	final class PhutilConsoleFormatter extends Phobject {

	private static $colorCodes = array(
	'black' => 0,
	'red' => 1,
	'green' => 2,
	'yellow' => 3,
	'blue' => 4,
	'magenta' => 5,
	'cyan' => 6,
	'white' => 7,
	'default' => 9,
	);

	private static $disableANSI;

	public static function disableANSI($disable) {
	self::$disableANSI = $disable;
	}

	public static function getDisableANSI() {
	if (self::$disableANSI === null) {
	self::$disableANSI = self::newShouldDisableAnsi();
	}
	return self::$disableANSI;
	}

	private static function newShouldDisableANSI() {
	$term = phutil_utf8_strtolower(getenv('TERM'));

	// ansicon enables ANSI support on Windows
	if (!$term && getenv('ANSICON')) {
	$term = 'ansi';
	}


	if (phutil_is_windows()) {
	if ($term !== 'cygwin' && $term !== 'ansi') {
	return true;
	}
	}

	$stdout = PhutilSystem::getStdoutHandle();
	if ($stdout === null) {
	return true;
	}

	if (function_exists('posix_isatty')) {
	if (!posix_isatty($stdout)) {
	return true;
	}
	}

	return false;
	}

	public static function formatString($format /* ... */) {
	$args = func_get_args();
	$args[0] = self::interpretFormat($args[0]);
	return call_user_func_array('sprintf', $args);
	}

	public static function replaceColorCode($matches) {
	$codes = self::$colorCodes;
	$offset = 30 + $codes[$matches[2]];
	$default = 39;
	if ($matches[1] == 'bg') {
	$offset += 10;
	$default += 10;
	}

	return chr(27).'['.$offset.'m'.$matches[3].chr(27).'['.$default.'m';
	}

	public static function interpretFormat($format) {
	$colors = implode('\|', array_keys(self::$colorCodes));

	// Sequence should be preceded by start-of-string or non-backslash
	// escaping.
	$bold_re = '/(?<![\\\\])\\(.)\\*/sU';
	$underline_re = '/(?<![\\\\])__(.*)__/sU';
	$invert_re = '/(?<![\\\\])##(.*)##/sU';

	if (self::getDisableANSI()) {
	$format = preg_replace($bold_re, '\1', $format);
	$format = preg_replace($underline_re, '\1', $format);
	$format = preg_replace($invert_re, '\1', $format);
	$format = preg_replace(
	'@<(fg\|bg):('.$colors.')>(.*)</\1>@sU',
	'\3',
	$format);
	} else {
	$esc = chr(27);
	$bold = $esc.'[1m'.'\\1'.$esc.'[m';
	$underline = $esc.'[4m'.'\\1'.$esc.'[m';
	$invert = $esc.'[7m'.'\\1'.$esc.'[m';

	$format = preg_replace($bold_re, $bold, $format);
	$format = preg_replace($underline_re, $underline, $format);
	$format = preg_replace($invert_re, $invert, $format);
	$format = preg_replace_callback(
	'@<(fg\|bg):('.$colors.')>(.*)</\1>@sU',
	array(__CLASS__, 'replaceColorCode'),
	$format);
	}

	// Remove backslash escaping
	return preg_replace('/\\\\(\\.\\\|__.__\|##.*##)/sU', '\1', $format);
	}

	}

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