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Number(new Date(lastChecked)) < aWeek) {\n logger.debug('Cached release is still recent, skipping remote check');\n return;\n }\n\n logger.debug('Checking for newer releases on GitHub');\n const eTag = cacheManager.get(name, 'eTag');\n const latestVersion = await getLatestRnDiffPurgeVersion(name, eTag);\n logger.debug(`Latest release: ${latestVersion}`);\n\n if (\n semver.compare(latestVersion, currentVersion) === 1 &&\n !semver.prerelease(latestVersion)\n ) {\n return {\n version: latestVersion,\n changelogUrl: buildChangelogUrl(latestVersion),\n diffUrl: buildDiffUrl(currentVersion),\n };\n }\n } catch (e) {\n logger.debug(\n 'Something went wrong with remote version checking, moving on',\n );\n logger.debug(e);\n }\n}\n\nfunction buildChangelogUrl(version: string) {\n return `https://github.com/facebook/react-native/releases/tag/v${version}`;\n}\n\nfunction buildDiffUrl(version: string) {\n return `https://react-native-community.github.io/upgrade-helper/?from=${version}`;\n}\n\n/**\n * Returns the most recent React Native version available to upgrade to.\n */\nasync function getLatestRnDiffPurgeVersion(\n name: string,\n eTag?: string,\n): Promise<string> {\n const options = {\n // https://developer.github.com/v3/#user-agent-required\n headers: {'User-Agent': 'React-Native-CLI'} as Headers,\n };\n\n if (eTag) {\n options.headers['If-None-Match'] = eTag;\n }\n\n const {data, status, headers} = await fetch(\n 'https://api.github.com/repos/react-native-community/rn-diff-purge/tags',\n options,\n );\n\n // Remote is newer.\n if (status === 200) {\n const body: Array<any> = data;\n const latestVersion = body[0].name.substring(8);\n const eTagHeader = headers.get('eTag');\n\n // Update cache only if newer release is stable.\n if (!semver.prerelease(latestVersion) && eTagHeader) {\n logger.debug(`Saving ${eTagHeader} to cache`);\n cacheManager.set(name, 'eTag', eTagHeader);\n cacheManager.set(name, 'latestVersion', latestVersion);\n }\n\n return latestVersion;\n }\n\n // Cache is still valid.\n if (status === 304) {\n const latestVersion = cacheManager.get(name, 'latestVersion');\n if (latestVersion) {\n return latestVersion;\n }\n }\n\n // Should be returned only if something went wrong.\n return '0.0.0';\n}\n\ntype Headers = {\n 'User-Agent': string;\n [header: string]: string;\n};\n"]} |