Missing regenerator-runtime

[jamesjnadeau]

Encountered this error when trying things out for the first time, I'm using the latest version, aka i installed with npm install -g gatsby-cli@latest

I was getting the following error:
chronos@localhost ~/Downloads/Code $ gatsby new tutorial-part-one https://github.com/gatsbyjs/gatsby-starter-hello-world
module.js:327
throw err;
^

Error: Cannot find module 'regenerator-runtime/runtime'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (/usr/local/share/nvm/versions/node/v4.8.4/lib/node_modules/gatsby-cli/index.js:92:1)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)

I'm using a chromebook with node installed on it through chromebrew, so maybe I'm the problem. I was able to fix it by running a npm install regenerator-runtime in the gatsby-cli install location, that seems to have fixed my issue.

[KyleAMathews]

Yeah, we're not actively testing on Node 4 anymore… which is perhaps the problem. Though gatsby-cli already has babel-runtime which should provide the regenerator-runtime I thought.

[jquense]

@KyleAMathews the problem is some packages are expecting it to be a global object. the runtime doesn't do that. gatsby-cli shouldn't be expecting it, and i'm not at all sure why its compiling that way. There must be something off with the preset-env configuration

[KyleAMathews]

Hmmm yeah. This page says you can use either babel-polyfill or the regenerator-runtime but babel-cli is compiled to be requiring the regenerator-runtime https://unpkg.com/gatsby-cli@1.1.3

[KyleAMathews]

Perhaps we're missing the transformer-regenerator plugin?

[jquense]

I think we need tell babel-preset-env to not transpile the "useBuiltins" bit for the runtime...i'm not sure how to do that.

[jamesjnadeau]

before you guys go deep into this, I was using a new setup, and this was the first thing I tried to run. Other existing projects are not working as well. I'm going to close this for now until I can more reliably reproduce the problem from a known working setup

[jquense]

babel/babel-preset-env#221

[KyleAMathews]

@jamesjnadeau nah you're good :-) other people have this problem too so we need to fix it.

[whmountains]

This is probably related to #1847 .

[KyleAMathews]

@whmountains yeah, we didn't fix it apparently

[KyleAMathews]

@jquense hmmm feeling tired but if I read that right the regenerator isn't automatically being added right now (bug perhaps) so we should just manually import it?

[jquense]

The problem here is that we are expecting calls "regeneratorRuntime" to be transpiled to require('babel-runtime/regenerator'), And that's what is happening in all the packages (see: https://unpkg.com/gatsby@1.9.7/dist/bootstrap). However the initial require('babel-polyfill') in the entry file is being transpiled down to each individual require to the polyfill (becasue we have useBuiltins set) THAT is seeing we need the regenerator transform and adding a require to require("regenerator-runtime/runtime"); which is not being found, becasue we are expecting it in babel-runtime

[jamesjnadeau]

So, I did get my setup working, and I still had to go in to the install and run npm install regenerator-runtime for node 4.8.4, good luck!