generate_sprites.php
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generate_sprites.php
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	#!/usr/bin/env php
	<?php

	require_once dirname(dirname(__FILE__)).'/__init_script__.php';

	$args = new PhutilArgumentParser($argv);
	$args->setTagline(pht('regenerate CSS sprite sheets'));
	$args->setSynopsis(<<<EOHELP
	sprites
	Rebuild CSS sprite sheets.

	EOHELP
	);
	$args->parseStandardArguments();
	$args->parse(
	array(
	array(
	'name' => 'force',
	'help' => pht('Force regeneration even if sources have not changed.'),
	),
	));

	$root = dirname(phutil_get_library_root('phabricator'));
	$webroot = $root.'/webroot/rsrc';
	$webroot = Filesystem::readablePath($webroot);

	$generator = new CeleritySpriteGenerator();

	$sheets = array(
	'menu' => $generator->buildMenuSheet(),
	'tokens' => $generator->buildTokenSheet(),
	'login' => $generator->buildLoginSheet(),
	'projects' => $generator->buildProjectsSheet(),
	);

	list($err) = exec_manual('optipng');
	if ($err) {
	$have_optipng = false;
	echo phutil_console_format(
	"<bg:red> %s </bg> %s\n%s\n",
	pht('WARNING'),
	pht('`%s` not found in PATH.', 'optipng'),
	pht('Sprites will not be optimized! Install `%s`!', 'optipng'));
	} else {
	$have_optipng = true;
	}

	foreach ($sheets as $name => $sheet) {

	$sheet->setBasePath($root);

	$manifest_path = $root.'/resources/sprite/manifest/'.$name.'.json';
	if (!$args->getArg('force')) {
	if (Filesystem::pathExists($manifest_path)) {
	$data = Filesystem::readFile($manifest_path);
	$data = phutil_json_decode($data);
	if (!$sheet->needsRegeneration($data)) {
	continue;
	}
	}
	}

	$sheet
	->generateCSS($webroot."/css/sprite-{$name}.css")
	->generateManifest($root."/resources/sprite/manifest/{$name}.json");

	foreach ($sheet->getScales() as $scale) {
	if ($scale == 1) {
	$sheet_name = "sprite-{$name}.png";
	} else {
	$sheet_name = "sprite-{$name}-X{$scale}.png";
	}

	$full_path = "{$webroot}/image/{$sheet_name}";
	$sheet->generateImage($full_path, $scale);

	if ($have_optipng) {
	echo pht('Optimizing...')."\n";
	phutil_passthru('optipng -o7 -clobber %s', $full_path);
	}
	}
	}

	echo pht('Done.')."\n";

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