[WIP/RFC] .parcelignore

[DeMoorJasper]

So i gave .parcelignore a shot because it's been requested in some issues.

Some questions

• Should the ignore, ignore the files completely or include them as is without parsing?
• Currently i'm having issues by not wanting to read the .parcelignore synchronous and seeing that all getDependencies/addDependency logic is synchronous, so if i would change it into an asynchronous function I would change a lot of core logic which is not really a good idea I think. Is there a better way to handle this or should i write .parcelignore logic to be synchronous?
• Does this collide with the whole point of 0-config?

Progress:

• Create ignoreChecker following gitignore logic
• Find the best way to alter getDependencies Should end up in the resolver
• Ignore files that are flagged by ignoreChecker

related #141 #357 #333

[devongovett]

Good questions! Also related: #474. Not sure I have the answers yet. I think we need a bit more input from others on how this should work.

On your second point, I don't think I'd do this in addDependency. I think it's ok if the dependency is still parsed. Instead, you could check in the Resolver, and return null if the file is ignored. That will cause a few other changes to check for null in Bundler, but should be easier than trying to change the logic in every asset type.

[jamiebuilds]

I would like to discuss this in the context of a more complete (.parcelrc) config format. I think it's possible that this would not be necessary.

[mikkiek]

Hello,

Any ideas when can i expect parcelignore "miracle"?

[agauniyal]

In my case(#357) I wanted to ignore certain sections, not the whole file itself 😅, would that be possible with this PR?

[mathiasrw]

A central use case would be to link from your HTML to a legacy entry point.

Let's say you have a nice static website up and running with parceljs but you would like to link to your crazy old PHP3 system located at /login - at the current version <a href="/login">login</a> will result in an error because it cant find /../../../../../login (at the root of the drive)

I suggest adding /login to the .parcelignore would ignore it as a dependency and just move along without any output.

[jessehattabaugh]

In my case I'm using Firebase hosting, and want to use their special urls to load the firebase api. Would be nice to have a .parcelignore where I could ignore globs like /__/*.

[mathiasrw]

@DeMoorJasper any inputs to why this got rejected?

[DeMoorJasper]

@mathiasrw I just closed it due to inactivity if parcelignore ever gets approved i’ll just make a new pr

_{Sent with GitHawk}

[dinvlad]

+1 on special URLs used by Firebase

[mririgoyen]

Would like to see this reopened. Here's a PERFECT use case for it: moment/moment#2517 (comment)

[DeMoorJasper]

Please do not comment on an old closed PR, open up a new issue instead.