Parcel and elm-tooling

[emthornber]

I'm developing on RPi5 (linux_arm) and use elm-tooling to install elm, elm-format, and elm-json.

Installed parcel via npm and coded the Elm example from the doc.

Called parcel via npx which barfed on installing @parcel/transformer-elm. Worse, node-modules/.bin/elm symbolic link had been trampled on.

It would seem that parcel is not recognising that elm compiler is installed and it trying to download it but cannot find an image for linux_arm platform.

How does parcel check for the presence of the elm compiler ?

--
Mark Thornber

[mischnic]

It just installs the elm package from npm:

parcel/packages/transformers/elm/package.json

Line 33 in eb54820

"elm": "^0.19.1-5"

[emthornber]

Agreed - and that works on x64 Ubuntu. My question is why parcel doesn't recognise that the elm compiler is already installed.

--
MarkT

[emthornber]

Niklas, … and there is the problem.  NPM does not have a build for arm processor but there is an elm-tooling offering that _does_ support arm.  I’ve installed that and the package creates symbolic links from the place that npm would have installed elm.  However parcel queries npm for elm, finds it doesn’t know about elm (just elm-tooling) and tries to install an unusable elm. Ideally I’d like parcel to look for both elm-tooling and elm before attempting an installation. Stay Safe —  Mark Thornber ====================  E M Thornber CEng MIET  Enchanted Systems Limited  Software Toolsmiths  +44 1503 272097  Registered in England No: 3595651  Registered Office:  Little Garth, Talland Hill  Polperro, LOOE, Cornwall  PL13 2JL  VAT No: GB 717 7967 83  On 8 May 2024 at 13:49:15, Niklas Mischkulnig ***@***.***) wrote: It just installs the elm package from npm: https://github.com/parcel-bundler/parcel/blob/eb548207fe291745cc62f07262fcf83c0c618b63/packages/transformers/elm/package.json#L33 — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.

[yamadapc]

We shouldn't have this check -

parcel/packages/transformers/elm/src/loadConfig.js

Line 29 in eb54820

let elmBinary = resolveLocalElmBinary();

It seems the node wrapper itself will find the binary ; so there's no need to install that package or enforce that the binary is vendored in node_modules. https://github.com/rtfeldman/node-elm-compiler/blob/master/src/index.ts#L5

Then this also shouldn't be passed in https://github.com/parcel-bundler/parcel/blob/v2/packages/transformers/elm/src/ElmTransformer.js#L109

Alternatively the upstream elm package should be fixed.