build --watch doesn't delete files from dist when deleted from source

[francislavoie]

Title is pretty self explanatory - if I run build --watch, then create a file in src/ then delete it, dist/ will still have the output .js file. The logs don't show a "File changed" message when deleting a file.

This isn't a dealbreaker, but is this viable to fix at all?

[Akiyamka]

Interesting, at least "File changed" message expected:
https://github.com/pikapkg/snowpack/blob/0b0b613fd820243a4aa74d407fa4ca5f5775ab33/packages/snowpack/src/commands/dev.ts#L858

[FredKSchott]

Yea, we used to clear out the build directory all of the time, but recently switched to this being opt-in, instead of opt-out. You can run build --clean at any time to clear out the build directory.

I'd be +1 to a PR that deleted the file when the file watcher detected it as unlinked, but this would involve a bit of src -> dest file mapping logic that wouldn't be worth the trouble, IMO.