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2554264fdd
The metadata cache files now use a two-line NDJSON format: - Line 1: cache headers (etag, modified, cachedAt) ~100 bytes - Line 2: raw registry metadata JSON (unchanged) This allows loadMetaHeaders to read only the first 1 KB of the file to extract conditional-request headers (etag, modified), avoiding the cost of reading and parsing multi-MB metadata files when the registry returns 200 and the old metadata would be discarded. Also moves cache directories to v11/ namespace (v11/metadata, v11/metadata-full, v11/metadata-full-filtered) since the format is not backwards compatible.
38 lines
1.1 KiB
TypeScript
38 lines
1.1 KiB
TypeScript
import fs from 'node:fs'
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export { getMockAgent, setupMockAgent, teardownMockAgent } from '@pnpm/testing.mock-agent'
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export async function retryLoadJsonFile<T> (filePath: string): Promise<T> {
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let retry = 0
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/* eslint-disable no-await-in-loop */
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while (true) {
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await delay(500)
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try {
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const data = await fs.promises.readFile(filePath, 'utf8')
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return parseNdjsonMeta(data) as T
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} catch (err: any) { // eslint-disable-line
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if (retry > 2) throw err
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retry++
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}
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}
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/* eslint-enable no-await-in-loop */
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}
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/**
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* Parses an NDJSON cache file: line 1 = headers, line 2 = metadata.
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* The headers (etag, modified) are merged into the metadata object.
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*/
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export function parseNdjsonMeta<T> (data: string): T {
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const newlineIdx = data.indexOf('\n')
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if (newlineIdx === -1) return JSON.parse(data) as T
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const headers = JSON.parse(data.slice(0, newlineIdx))
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const meta = JSON.parse(data.slice(newlineIdx + 1))
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return { ...meta, ...headers } as T
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}
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export async function delay (time: number): Promise<void> {
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return new Promise<void>((resolve) => setTimeout(() => {
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resolve()
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}, time))
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}
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