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generate_emoji.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 Emoji data sheets'));
			$args->setSynopsis(<<<EOHELP
			emoji
			Rebuild Emoji data 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'));
			// move this to an argument?
			$path = $root.'/emoji_strategy.json';
			$export_path = $root.'/resources/emoji/manifest.json';

			if (Filesystem::pathExists($path)) {
			$json = Filesystem::readFile($path);

			$emojis = phutil_json_decode($json);
			$data = array();
			foreach ($emojis as $shortname => $emoji) {
			$unicode = $emoji['unicode'];
			$codes = explode('-', $unicode);
			$hex = '';
			foreach ($codes as $code) {
			$hex .= phutil_utf8_encode_codepoint(hexdec($code));
			}
			$data[$shortname] = $hex;
			}

			ksort($data);
			$json = new PhutilJSON();
			$data = $json->encodeFormatted($data);
			Filesystem::writeFile($export_path, $data);
			echo pht('Done.')."\n";
			} else {
			echo pht('Path %s not exist.', $path)."\n";
			}