Watcher reporting (in)correct file names when saving in IntelliJ & co.

[vlascik]

So, IntelliJ / WebStorm / PHPStorm family of IDEs have an option in Settings -> Appearance & Behavior -> System Settings -> Back up files before saving. What it does is to save the edited file as <filename.ext>~, filename with a tilde appended to the end before saving to the original.

Sound innocuous enough, but this creates a problem with broccoli / ember-cli on rebuilds - broccoli watcher notices this change first, reports the changed file as e.g. broccoli:watcherAdapter change P:\Project\app/components\test1\template.hbs~ to the system, and "swallows" the consecutive change to the original file.

This is an issue for ember-cli addons that match the file extensions to decide if they should act on the file, e.g. https://github.com/lifeart/ember-ast-hot-load, probably also https://github.com/typed-ember/ember-cli-typescript, maybe also others.

E.g. https://github.com/lifeart/ember-ast-hot-load/blob/e006fad067e7bf818db0b498b4a3fd6ae7f337e6/lib/hot-reloader.js#L6 matches for js/ts/hbs extensions, but gets js~/ts~/hbs~ instead, and fails.

Now, this is definitely an edge case, but given how easy to miss it is and how used IntelliJ IDEs are (#⁠1 or #⁠2 spot along VS Code), maybe it deserves some attention - either as a fix/special case in watcher adapter, or at least a mention of a workaround (disabling the IntelliJ back up setting) in documentation?

[NullVoxPopuli]

Vim has a similar issue by default. And since this is a problem with all file watching systems in js -- even with webpack, parcel, etc (Last I used them anyway), the solution, for me, was to move the temp files to a different directory.

In my vim config, I have the ability to do this:

set backupdir=~/.local/share/nvim/_backup/    " where to put backup files.
set directory=~/.local/share/nvim/_temp/      " where to put swap files.

So now all my editor specific temp files can't affect any project I'm, regardless of what tools I'm using! 🎉

Maybe the webstorm family of IDEs has a similar option?

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Though, a more robust fix would be to find all ecosystem plugins that do file watching and add a $ to their regexes so that the .swp, or in your case, ~ are ignored.

But if your editor has a way to not pollute your project, that'd be a quicker fix