Detect broken build state

[rwz]

Sometimes EmberCLI fails to build assets due to syntax error. Rails does not provide any sort of feedback and continues to serve an old pre-fail version of assets. All that results in the situation where developer refreshes the page several times not realizing that the changes he just made are not included into the resulting assets.

It'd be nice to make EmberCLI::Rails gem to have an ability to detect this state and display an error view similar to the one you see when Assets Pipeline fails to build an asset.

Is there a way to do that without parsing EmberCLI build process output? Maybe there could be a hidden file containing last build error, so we could check for its existence to detect a broken build state?

//cc @rwjblue

[rwjblue]

I can't recall if we have discussed this in an issue yet, but my suggestion would be to inject an addon into the ember-cli app and have that addon detect build failures and write a file with the error details. This would also provide a nice way to communicate between ember-cli and Rails...

[rondale-sc]

@rwjblue Is there a way to override the default behavior on error with an addon?

[edit] I've been meaning to add an addon for the storeConfigInMeta stuff. I think I'll start workin' on it and see where we end up.

[rwjblue]

I have a hacked up branch that adds a 'buildError' addon hook. I'm pretty sure that should be all you need.

[rondale-sc]

Merged into ember-cli here: ember-cli/ember-cli#2832

[rondale-sc]

I'm starting to fool around with this locally, will let you know when I have something.

[rwjblue]

0.1.5 is released and includes the buildError hook.

[rwz]

We need to make this work. If only there were like 30 hours in a day and less other awesome things to procrastinate on.

[rondale-sc]

@rwz

https://github.com/rondale-sc/ember-cli-rails-addon/tree/v0.0.9

[rondale-sc]

Yay!