fix: update cache handler to accommodate changes in next@canary#2572
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pieh
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Aug 27, 2024
| } else { | ||
| // npm is the default | ||
| cmd = `npm install --no-audit --progress=false --prefer-offline --legacy-peer-deps` | ||
| await rm(join(cwd, 'package-lock.json'), { force: true }) |
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This is for local deving. Doesn't impact our CI runs, because lock files for fixtures are not commited
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pieh
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Aug 27, 2024
pieh
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Aug 27, 2024
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| const { stdout } = await execaCommand( | ||
| `npm info next@${resolvedVersion} peerDependencies --json`, | ||
| { cwd }, | ||
| ) | ||
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| const nextPeerDependencies = JSON.parse(stdout) |
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next@canary started to bump react(-dom) peer dependencies quite frequently, so instead of hardcoding react version - we just check what react version given next version needs
pieh
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Aug 28, 2024
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| export type CachedFetchValueForMultipleVersions = Omit<CachedFetchValue, 'kind'> & { | ||
| kind: 'FETCH' | ||
| } |
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This one is really just to satisfy TS. Next now uses const enum with string values and you can't assign string literal to it (even tho the value matches).
For other similar cases like this - i.e. kind: 'PAGE' | 'PAGES' or kind: 'ROUTE' | 'APP_ROUTE' - Next actually changed the string value from PAGE to PAGES and ROUTE to APP_ROUTE and we want to support both.
For our CacheHandler implementation we do receive appropriate kind used by Next.js in .set variant as it's Next.js that produce cache value to store.
For .get case we check what we stored in handle things appropriately for kinds before and after kind change and we don't need to make any decision which should be used there.
We do have to figure out which kind to actually use when seeding blobs from prerendered content, so that's the only case that need to decide which kind to use (and it's done based on Next.js version)
serhalp
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Aug 28, 2024
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LGTM, heroic effort dealing with this madness!
| packageJson.dependencies.next = version | ||
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| const { stdout } = await execaCommand( | ||
| `npm info next@${resolvedVersion} peerDependencies --json`, |
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I'm just curious why 🙈 on this one. I more than agree on all other cases of 🙈 ... "notes" :) But this one I think is reasonable way to solve the react(-dom) peerDeps problem with next@canary? Unless this is more about the need to do something like this than doing what I'm doing here?
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Yes it's about the need to do this at all, not about the solution you went with! :)
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| // https://github.com/vercel/next.js/pull/68602 changed the cache kind for Pages router pages from `PAGE` to `PAGES` and from `ROUTE` to `APP_ROUTE`. | ||
| const shouldUseEnumKind = ctx.nextVersion | ||
| ? satisfies(ctx.nextVersion, '>=15.0.0-canary.114 <15.0.0-d || >15.0.0-rc.0', { |
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| type IncrementalCacheValueToMultipleVersions<T> = T extends CachedRouteValue | ||
| ? CachedRouteValueForMultipleVersions | ||
| : T extends IncrementalCachedPageValue | ||
| ? IncrementalCachedPageValueForMultipleVersions | ||
| : T extends IncrementalCachedAppPageValue | ||
| ? IncrementalCachedAppPageValueForMultipleVersions | ||
| : T extends CachedFetchValue | ||
| ? CachedFetchValueForMultipleVersions | ||
| : T extends CacheHandlerValue | ||
| ? { | ||
| [K in keyof T]: IncrementalCacheValueToMultipleVersions<T[K]> | ||
| } | ||
| : T |
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Yeah, this whole thing is quite a mess. It doesn't help that there are 2 type variants generally created there:
- (new)mapping types from currently used
nextversion we have for types to not that version specific but instead have kind of union that "work" for all the next versions we support (which is what this inline comment highlights) - Mapping those types to how we actually store data in blobs (i.e. instead of using
Bufferwe usestringfor storage or adding extra information aboutrevalidatethat is used to figure out cacheable route handler response maxage).
For 1. I did try having multiple next version in deps and import types from there and have some kind of union on them, but setup for it was pretty messy:
- I could not use npm alias and have multiple next versions there because their react(-dom) peerDeps could not be satisfied at the same time)
- Using unions there was still not enough because next@canary now uses const enum so I would have to do messy things either way.
So I don't think we should treat those types necessarily as safeguard that we are using them correctly for Next purposes (unfortunately :( ).
The option where this could maybe work is if we would have actual 2 (or more) variants of CacheHandler implementations, but because those would be largely the same we would either have almost copies of them or maybe some abstraction that would be more difficult to read :/
Co-authored-by: Philippe Serhal <philippe.serhal@netlify.com>
orinokai
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LGTM and 👏🏼 for dealing with this all. It's also made me think we should discuss our options regarding long-term support of different Next versions. I feel like there might be trade-offs we can make that could avoid incrementally adding complexity like this. Will start a doc...
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Description
Adjusting for recent changes in
next@canary:kindchanges (PAGE->PAGESandROUTE->APP_ROUTE) - see: refactor: incremental cache cleanup vercel/next.js#68602 (not the most immediately visible, but https://github.com/vercel/next.js/pull/68602/files#diff-cdee3ad3788ca17ac8dbaa342fe7e7ac4b1362cbc10b7bf22f7568302c995584R40-R47 is current enum for it)NODE_ENV=productionenv var - https://github.com/vercel/next.js/pull/68193/files#diff-37243d614f1f5d3f7ea50bbf2af263f6b1a9a4f70e84427977781e07b02f57f1R49 this import indirectly requiresreactand at this point nothing setsNODE_ENVyet which results in loading development react version (which is later used forever due to being stored inrequire.cache). This later causes some conflicts as actual rendering will use production react version. Do note thatNODE_ENVsetting is being done in standalone output entry point that Next.js produces - https://github.com/vercel/next.js/blob/c3c38bd191ae0343cb1a449b00970ede0913ea8d/packages/next/src/build/utils.ts#L2221 but we aren't actually using this entrypoint, so setting it ourselves brings as closer to Next.js overall while also fixing dev/prod react problem)Documentation
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