|
| 1 | +import path from 'node:path'; |
| 2 | +import { readFile, writeFile } from 'node:fs/promises'; |
| 3 | +import { valid as isValidSemver } from 'semver'; |
| 4 | + |
| 5 | +export interface GeneratedVersion { |
| 6 | + version: string; |
| 7 | +} |
| 8 | + |
| 9 | +export interface GeneratedVersions { |
| 10 | + latest: GeneratedVersion; |
| 11 | + next: GeneratedVersion; |
| 12 | +} |
| 13 | + |
| 14 | +const DIST_TAGS_URL = |
| 15 | + 'https://registry.npmjs.org/-/package/storybook/dist-tags'; |
| 16 | + |
| 17 | +export const generatedVersionsFilePath = path.join( |
| 18 | + process.cwd(), |
| 19 | + 'generated-versions.json', |
| 20 | +); |
| 21 | + |
| 22 | +function assertDistTagVersion( |
| 23 | + distTag: keyof GeneratedVersions, |
| 24 | + version: unknown, |
| 25 | +): GeneratedVersion { |
| 26 | + if (typeof version !== 'string' || !isValidSemver(version)) { |
| 27 | + throw new Error( |
| 28 | + `Expected a valid semver string for the ${distTag} dist-tag, received ${JSON.stringify(version)}`, |
| 29 | + ); |
| 30 | + } |
| 31 | + |
| 32 | + return { version }; |
| 33 | +} |
| 34 | + |
| 35 | +export async function fetchGeneratedVersions(): Promise<GeneratedVersions> { |
| 36 | + const response = await fetch(DIST_TAGS_URL, { |
| 37 | + headers: { |
| 38 | + Accept: 'application/json', |
| 39 | + 'Cache-Control': 'no-cache', |
| 40 | + }, |
| 41 | + }); |
| 42 | + |
| 43 | + if (!response.ok) { |
| 44 | + throw new Error( |
| 45 | + `Failed to fetch Storybook dist-tags from npm: ${String(response.status)} ${response.statusText}`, |
| 46 | + ); |
| 47 | + } |
| 48 | + |
| 49 | + const distTags = (await response.json()) as Partial< |
| 50 | + Record<keyof GeneratedVersions, unknown> |
| 51 | + >; |
| 52 | + |
| 53 | + return { |
| 54 | + latest: assertDistTagVersion('latest', distTags.latest), |
| 55 | + next: assertDistTagVersion('next', distTags.next), |
| 56 | + }; |
| 57 | +} |
| 58 | + |
| 59 | +export async function readGeneratedVersions(): Promise<GeneratedVersions> { |
| 60 | + const fileContents = await readFile(generatedVersionsFilePath, 'utf8'); |
| 61 | + const parsed = JSON.parse(fileContents) as Partial< |
| 62 | + Record<keyof GeneratedVersions, { version?: unknown }> |
| 63 | + >; |
| 64 | + |
| 65 | + return { |
| 66 | + latest: assertDistTagVersion('latest', parsed.latest?.version), |
| 67 | + next: assertDistTagVersion('next', parsed.next?.version), |
| 68 | + }; |
| 69 | +} |
| 70 | + |
| 71 | +export async function writeGeneratedVersions( |
| 72 | + versions: GeneratedVersions, |
| 73 | +): Promise<void> { |
| 74 | + await writeFile( |
| 75 | + generatedVersionsFilePath, |
| 76 | + `${JSON.stringify(versions, null, 2)}\n`, |
| 77 | + 'utf8', |
| 78 | + ); |
| 79 | +} |
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