npx zenstack@latest init broken (TypeError: Class extends value undefined is not a constructor or null)

[devx-opensource]

Description and expected behavior npx zenstack@latest init should work but instead got this:

_npx/aded272cd7beac82/node_modules/chevrotain-allstar/lib/all-star-lookahead.js:62 class LLStarLookaheadStrategy extends chevrotain_1.LLkLookaheadStrategy { ^

TypeError: Class extends value undefined is not a constructor or null at Object. (/Users/sam/.npm/_npx/aded272cd7beac82/node_modules/chevrotain-allstar/lib/all-star-lookahead.js:62:52) at Module._compile (node:internal/modules/cjs/loader:1254:14) at Module._extensions..js (node:internal/modules/cjs/loader:1308:10) at Module.load (node:internal/modules/cjs/loader:1117:32) at Module._load (node:internal/modules/cjs/loader:958:12) at Module.require (node:internal/modules/cjs/loader:1141:19) at require (node:internal/modules/cjs/helpers:110:18) at Object. (/Users/sam/.npm/_npx/aded272cd7beac82/node_modules/chevrotain-allstar/lib/index.js:9:28) at Module._compile (node:internal/modules/cjs/loader:1254:14) at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)

Node.js v18.15.0

Environment (please complete the following information):

• ZenStack version: latest, and many 1.0.0-alphaXX
• Prisma version: 4.12
• Database type: Postgresql

Additional context Tried on a macbook M2, on an ubuntu machine, with NodeJS 16 & 18

[ymc9]

Hi @devx-opensource ,

Thanks for reporting this. I tried to reproduce it by initializing a Next.js + Prisma project with the latest zenstack (1.0.0-alpha.113) with the following setups but couldn't see the failure:

• Macbook M1 + Node 16/18
• Ubuntu 22.10 + Node 18

I suspect it either has something to do with an outdated version dangling around or something specific with the project being initialized. Could you help me with the following information?

• When zenstack init runs, what's the exact version printed on the console?
• What kind of project are you initializing? Like Next.js, Express.js, etc.
• What's the version of chevrotain-allstar package.json under _npx/aded272cd7beac82/node_modules/chevrotain-allstar?

Thanks!

[chunkerchunker]

I ran into the same problem (Mac M1, Node 16/18, zenstack@alpha.11*). (I'm trying zenstack for the first time.)

My npx chevrotain-allstar version is 0.1.7.

Looking at the source, this requires chevrotain >= 10.0.0.

But my npx chevrotain is at 9.1.0.

It looks like the problem is that zenstack/package.json specifies chevrotain ^9.1.0 while it also specifies langium 1.1.0, which correctly requires chevrotain 10.4.2.

I was able to successfully run the 'zenstack init' from source at current master and verified that the correct version of chevrotain is used (10.4.2).

So I believe the fix is simply to remove the chevrotain dependency from zenstack/package.json.

[ymc9]

Thanks for looking into this @chunkerchunker ! The dependency on chevrotain was added previously for avoiding a bug in its newer version ...

Let me remove that (and probably also upgrade to the new version of langium as well).

[ymc9]

Hey @devx-opensource @chunkerchunker I've published a new version (alpha.116) for the fix.

[chunkerchunker]

Thanks for such a quick turnaround! I just verified that it works for me.

[ymc9]

Awesome. Thank you!

[ymc9]

Fixed by #407