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{ CancellationToken, GithubOptions, githubUrl, HttpError, newError, parseXml, ReleaseNoteInfo, UpdateInfo, XElement } from \"builder-util-runtime\"\nimport * as semver from \"semver\"\nimport { URL } from \"url\"\nimport { AppUpdater } from \"../AppUpdater\"\nimport { ResolvedUpdateFileInfo } from \"../types\"\nimport { getChannelFilename, newBaseUrl, newUrlFromBase } from \"../util\"\nimport { parseUpdateInfo, Provider, ProviderRuntimeOptions, resolveFiles } from \"./Provider\"\n\nconst hrefRegExp = /\\/tag\\/([^/]+)$/\n\ninterface GithubUpdateInfo extends UpdateInfo {\n tag: string\n}\nexport abstract class BaseGitHubProvider extends Provider {\n // so, we don't need to parse port (because node http doesn't support host as url does)\n protected readonly baseUrl: URL\n protected readonly baseApiUrl: URL\n\n protected constructor(\n protected readonly options: GithubOptions,\n defaultHost: string,\n runtimeOptions: ProviderRuntimeOptions\n ) {\n super({\n ...runtimeOptions,\n /* because GitHib uses S3 */\n isUseMultipleRangeRequest: false,\n })\n\n this.baseUrl = newBaseUrl(githubUrl(options, defaultHost))\n const apiHost = defaultHost === \"github.com\" ? \"api.github.com\" : defaultHost\n this.baseApiUrl = newBaseUrl(githubUrl(options, apiHost))\n }\n\n protected computeGithubBasePath(result: string): string {\n // https://github.com/electron-userland/electron-builder/issues/1903#issuecomment-320881211\n const host = this.options.host\n return host && ![\"github.com\", \"api.github.com\"].includes(host) ? `/api/v3${result}` : result\n }\n}\n\nexport class GitHubProvider extends BaseGitHubProvider {\n constructor(\n protected readonly options: GithubOptions,\n private readonly updater: AppUpdater,\n runtimeOptions: ProviderRuntimeOptions\n ) {\n super(options, \"github.com\", runtimeOptions)\n }\n\n private get channel(): string {\n const result = this.updater.channel || this.options.channel\n return result == null ? this.getDefaultChannelName() : this.getCustomChannelName(result)\n }\n\n async getLatestVersion(): Promise {\n const cancellationToken = new CancellationToken()\n\n const feedXml: string = (await this.httpRequest(\n newUrlFromBase(`${this.basePath}.atom`, this.baseUrl),\n {\n accept: \"application/xml, application/atom+xml, text/xml, */*\",\n },\n cancellationToken\n ))!\n\n const feed = parseXml(feedXml)\n // noinspection TypeScriptValidateJSTypes\n let latestRelease = feed.element(\"entry\", false, `No published versions on GitHub`)\n let tag: string | null = null\n try {\n if (this.updater.allowPrerelease) {\n const currentChannel = this.updater?.channel || (semver.prerelease(this.updater.currentVersion)?.[0] as string) || null\n\n if (currentChannel === null) {\n // noinspection TypeScriptValidateJSTypes\n tag = hrefRegExp.exec(latestRelease.element(\"link\").attribute(\"href\"))![1]\n } else {\n for (const element of feed.getElements(\"entry\")) {\n // noinspection TypeScriptValidateJSTypes\n const hrefElement = hrefRegExp.exec(element.element(\"link\").attribute(\"href\"))!\n\n // If this is null then something is wrong and skip this release\n if (hrefElement === null) {\n continue\n }\n\n // This Release's Tag\n const hrefTag = hrefElement[1]\n //Get Channel from this release's tag\n const hrefChannel = (semver.prerelease(hrefTag)?.[0] as string) || null\n\n const shouldFetchVersion = !currentChannel || [\"alpha\", \"beta\"].includes(currentChannel)\n const isCustomChannel = hrefChannel !== null && ![\"alpha\", \"beta\"].includes(String(hrefChannel))\n // Allow moving from alpha to beta but not down\n const channelMismatch = currentChannel === \"beta\" && hrefChannel === \"alpha\"\n\n if (shouldFetchVersion && !isCustomChannel && !channelMismatch) {\n tag = hrefTag\n break\n }\n\n const isNextPreRelease = hrefChannel && hrefChannel === currentChannel\n if (isNextPreRelease) {\n tag = hrefTag\n break\n }\n }\n }\n } else {\n tag = await this.getLatestTagName(cancellationToken)\n for (const element of feed.getElements(\"entry\")) {\n // noinspection TypeScriptValidateJSTypes\n if (hrefRegExp.exec(element.element(\"link\").attribute(\"href\"))![1] === tag) {\n latestRelease = element\n break\n }\n }\n }\n } catch (e: any) {\n throw newError(`Cannot parse releases feed: ${e.stack || e.message},\\nXML:\\n${feedXml}`, \"ERR_UPDATER_INVALID_RELEASE_FEED\")\n }\n\n if (tag == null) {\n throw newError(`No published versions on GitHub`, \"ERR_UPDATER_NO_PUBLISHED_VERSIONS\")\n }\n\n let rawData: string\n let channelFile = \"\"\n let channelFileUrl: any = \"\"\n const fetchData = async (channelName: string) => {\n channelFile = getChannelFilename(channelName)\n channelFileUrl = newUrlFromBase(this.getBaseDownloadPath(String(tag), channelFile), this.baseUrl)\n const requestOptions = this.createRequestOptions(channelFileUrl)\n try {\n return (await this.executor.request(requestOptions, cancellationToken))!\n } catch (e: any) {\n if (e instanceof HttpError && e.statusCode === 404) {\n throw newError(`Cannot find ${channelFile} in the latest release artifacts (${channelFileUrl}): ${e.stack || e.message}`, \"ERR_UPDATER_CHANNEL_FILE_NOT_FOUND\")\n }\n throw e\n }\n }\n\n try {\n let channel = this.channel\n if (this.updater.allowPrerelease && semver.prerelease(tag)?.[0]) {\n channel = this.getCustomChannelName(String(semver.prerelease(tag)?.[0]))\n }\n rawData = await fetchData(channel)\n } catch (e: any) {\n if (this.updater.allowPrerelease) {\n // Allow fallback to `latest.yml`\n rawData = await fetchData(this.getDefaultChannelName())\n } else {\n throw e\n }\n }\n\n const result = parseUpdateInfo(rawData, channelFile, channelFileUrl)\n if (result.releaseName == null) {\n result.releaseName = latestRelease.elementValueOrEmpty(\"title\")\n }\n\n if (result.releaseNotes == null) {\n result.releaseNotes = computeReleaseNotes(this.updater.currentVersion, this.updater.fullChangelog, feed, latestRelease)\n }\n return {\n tag: tag,\n ...result,\n }\n }\n\n private async getLatestTagName(cancellationToken: CancellationToken): Promise {\n const options = this.options\n // do not use API for GitHub to avoid limit, only for custom host or GitHub Enterprise\n const url =\n options.host == null || options.host === \"github.com\"\n ? newUrlFromBase(`${this.basePath}/latest`, this.baseUrl)\n : new URL(`${this.computeGithubBasePath(`/repos/${options.owner}/${options.repo}/releases`)}/latest`, this.baseApiUrl)\n try {\n const rawData = await this.httpRequest(url, { Accept: \"application/json\" }, cancellationToken)\n if (rawData == null) {\n return null\n }\n\n const releaseInfo: GithubReleaseInfo = JSON.parse(rawData)\n return releaseInfo.tag_name\n } catch (e: any) {\n throw newError(`Unable to find latest version on GitHub (${url}), please ensure a production release exists: ${e.stack || e.message}`, \"ERR_UPDATER_LATEST_VERSION_NOT_FOUND\")\n }\n }\n\n private get basePath(): string {\n return `/${this.options.owner}/${this.options.repo}/releases`\n }\n\n resolveFiles(updateInfo: GithubUpdateInfo): Array {\n // still replace space to - due to backward compatibility\n return resolveFiles(updateInfo, this.baseUrl, p => this.getBaseDownloadPath(updateInfo.tag, p.replace(/ /g, \"-\")))\n }\n\n private getBaseDownloadPath(tag: string, fileName: string): string {\n return `${this.basePath}/download/${tag}/${fileName}`\n }\n}\n\ninterface GithubReleaseInfo {\n readonly tag_name: string\n}\n\nfunction getNoteValue(parent: XElement): string {\n const result = parent.elementValueOrEmpty(\"content\")\n // GitHub reports empty notes as No content.\n return result === \"No content.\" ? \"\" : result\n}\n\nexport function computeReleaseNotes(currentVersion: semver.SemVer, isFullChangelog: boolean, feed: XElement, latestRelease: any): string | Array | null {\n if (!isFullChangelog) {\n return getNoteValue(latestRelease)\n }\n\n const releaseNotes: Array = []\n for (const release of feed.getElements(\"entry\")) {\n // noinspection TypeScriptValidateJSTypes\n const versionRelease = /\\/tag\\/v?([^/]+)$/.exec(release.element(\"link\").attribute(\"href\"))![1]\n if (semver.valid(versionRelease) && semver.lt(currentVersion, versionRelease)) {\n releaseNotes.push({\n version: versionRelease,\n note: getNoteValue(release),\n })\n }\n }\n return releaseNotes.sort((a, b) => semver.rcompare(a.version, b.version))\n}\n"]}