elm-app start fails when Emacs creates lock file

[kephas]

Is this a bug report?

Yes

Environment

1. node -v: v10.20.1
2. npm -v: 6.11.3
3. npm ls create-elm-app -g (if you haven’t ejected):

/home/pierre/.local/share/npm/lib
└── create-elm-app@4.2.24

1. Operating system: Linux 5.5.0-2-amd64 Reworked eject to use async prompt with promises #1 SMP Debian 5.5.17-1 (2020-04-15) x86_64 GNU/Linux

Steps to Reproduce

1. elm-app start
2. modify Elm file with Emacs without saving

Expected Behavior

Nothing should happen as the actual Elm file has not been modified.

Actual Behavior

elm-app stops with the following error:

/home/pierre/.local/share/npm/lib/node_modules/create-elm-app/scripts/start.js:11
  throw err;
  ^

Error: ENOENT: no such file or directory, stat '/home/pierre/Development/elm-lambda-playground/src/Lambda/.#Parser.elm

(Emacs's lockfile is a symlink pointing to a non-existant filename)

Reproducible Demo

https://github.com/kephas/elm-lambda-playground

[tonyea]

I'm having the same issue. Temporarily switching to vscode.

[kephas]

I configured Emacs to stop creating the lock files.

[woochica]

ReactJS's server fails the same way if encounters an Emacs lock file.

As @kephas suggested, you can tell Emacs to avoid creating lock files for your Elm project. Here's how: https://stackoverflow.com/a/62571200/73603