`ember-modifier` provides APIs to write our own modifiers. `@ember/render-modifiers` provides some simple `did-insert`, `did-update` and `will-destroy` modifiers.
Upcoming `ember-modifier` deprecations have been set to 'throw' in our deprecation-workflow config to ensure we don't accidently start using deprecated behaviour.
This update covers commits:
* e309b6d [BREAKING Make JS client throw if lastId not number](e309b6d533)
* f0bae69 [DEV: removes dead code](f0bae695b0)
* a72b930 [FIX: force a poll more consistently when visibility changes](a72b9308b4)
* 5c01715 [Permit CORS preflight caching](5c01715432)
* 1789784 [DEV: lint files](17897843b4)
* b9cfb90 [FIX: do not leak visibility event subscriptions on stop/start](b9cfb90dd6)
This switches us to use the modern ember resolver package, and re-implements a number of our custom resolution rules within it. The legacy resolver remains for now, and is used as a fallback if the modern resolver is unable to resolve a package. When this happens, a warning will be printed to the console.
Co-authored-by: Peter Wagenet <peter.wagenet@gmail.com>
Note this commit also introduce a new {{d-popover}} component, example usage:
```hbs
{{#d-popover |state|}}
{{d-button label="foo.things" class="d-popover-trigger"}}
<div class="d-popover-content">
Some content
<div>
{{/d-popover}}
```
Previously, accessing the Rails app directly in development mode would give you assets from our 'legacy' Ember asset pipeline. The only way to run with Ember CLI assets was to run ember-cli as a proxy. This was quite limiting when working on things which are bypassed when using the ember-cli proxy (e.g. changes to `application.html.erb`). Also, since `ember-auto-import` introduced chunking, visiting `/theme-qunit` under Ember CLI was failing to include all necessary chunks.
This commit teaches Sprockets about our Ember CLI assets so that they can be used in development mode, and are automatically collected up under `/public/assets` during `assets:precompile`. As a bonus, this allows us to remove all the custom manifest modification from `assets:precompile`.
The key changes are:
- Introduce a shared `EmberCli.enabled?` helper
- When ember-cli is enabled, add ember-cli `/dist/assets` as the top-priority Rails asset directory
- Have ember-cli output a `chunks.json` manifest, and teach `preload_script` to read it and append the correct chunks to their associated `afterFile`
- Remove most custom ember-cli logic from the `assets:precompile` step. Instead, rely on Rails to take care of pulling the 'precompiled' assets into the `public/assets` directory. Move the 'renaming' logic to runtime, so it can be used in development mode as well.
- Remove fingerprinting from `ember-cli-build`, and allow Rails to take care of things
Long-term, we may want to replace Sprockets with the lighter-weight Propshaft. The changes made in this commit have been made with that long-term goal in mind.
tldr: when you visit the rails app directly, you'll now be served the current ember-cli assets. To keep these up-to-date make sure either `ember serve`, or `ember build --watch` is running. If you really want to load the old non-ember-cli assets, then you should start the server with `EMBER_CLI_PROD_ASSETS=0`. (the legacy asset pipeline will be removed very soon)
Eventually we want to remove JQuery, but that's a long way off. Installing this package will stop ember-cli printing the deprecation warning on every boot
```
DEPRECATION: The integration of jQuery into Ember has been deprecated and will be removed with Ember 4.0. You can either opt-out of using jQuery, or install the `@ember/jquery` addon to provide the jQuery integration. Please consult the deprecation guide for further details: https://emberjs.com/deprecations/v3.x#toc_jquery-apis
```
This will only work under Ember CLI, and a small hack is required to make the Resolver work in development mode. In future, when we move to a more recent version of the Ember Resolver, this hack will not be required.
This makes a small improvement to 'cold cache' ember-cli build times, and a large improvement to 'warm cache' build times
The ember-auto-import update means that vendor is now split into multiple files for efficiency. These are named `chunk.*`, and should be included immediately after the `vendor.js` file. This commit also updates the rails app to render script tags for these chunks.
This change was previously merged, and caused memory-related errors on RAM-constrained machines. This was because Webpack 5 switches from multiple worker processes to a single multi-threaded process. This meant that it was hitting node's default heap size limit (~500mb on a 1GB RAM server). Discourse's standard install procedure recommends adding 2GB swap to 1GB-RAM machines, so we can afford to override's Node's default via the `--max-old-space-size` flag.
