Function getHTMLURL

app/src/lib/api.ts:2282–2313

(endpoint: string)

 * http://github.mycompany.com/api -> http://github.mycompany.com/
 */
export function getHTMLURL(endpoint: string): string {
  if (envHTMLURL !== undefined) {
    return envHTMLURL
  }

  // In the case of GitHub.com, the HTML site lives on the parent domain.
  //  E.g., https://api.github.com -> https://github.com
  //
  // Whereas with Enterprise, it lives on the same domain but without the
  // API path:
  //  E.g., https://github.mycompany.com/api/v3 -> https://github.mycompany.com
  //
  // We need to normalize them.
  if (endpoint === getDotComAPIEndpoint() && !envEndpoint) {
    return 'https://github.com'
  } else {
    if (isGHE(endpoint)) {
      const url = new window.URL(endpoint)

      url.pathname = '/'

      if (url.hostname.startsWith('api.')) {
        url.hostname = url.hostname.replace(/^api\./, '')
      }

      return url.toString()
    }

    const parsed = URL.parse(endpoint)
    return `${parsed.protocol}//${parsed.hostname}`
  }
}

/**
 * Get the API URL for an HTML URL. For example: