| export async function generateBuildId( | |
| generate: () => string | null | Promise<string | null>, | |
| fallback: () => string | |
| ): Promise<string> { | |
| let buildId = await generate() | |
| // If there's no buildId defined we'll fall back | |
| if (buildId === null) { | |
| // We also create a new buildId if it contains the word `ad` to avoid false | |
| // positives with ad blockers | |
| while (!buildId || /ad/i.test(buildId)) { | |
| buildId = fallback() | |
| } | |
| } | |
| if (typeof buildId !== 'string') { | |
| throw new Error( | |
| 'generateBuildId did not return a string. https://nextjs.org/docs/messages/generatebuildid-not-a-string' | |
| ) | |
| } | |
| return buildId.trim() | |
| } | |