af30536690
Our existing PluginOutlet system allows theme/plugin developers to easily insert new content into Discourse.
Another common requirement is to **replace** existing content in Discourse. Previously this could be achieved either using template overrides, or by introducing new content via a PluginOutlet and then hiding the old implementation with CSS. Neither of these patterns are ideal from a maintainability or performance standpoint.
This commit introduces a new mode for PluginOutlets. They can now be used to 'wrap' blocks of content in core. If a plugin/theme registers a connector for the outlet, then it will be rendered **instead of** the core implementation. If needed, outlets can use `{{yield}}` to render the core implementation inside their own implementation (e.g. to add a wrapper element).
In this 'wrapper' mode, only one connector can be registered for each outlet. If more than one is registered, only one will be used, and an error will be printed to the console.
To introduce a new PluginOutlet wrapper, this kind of thing can be added to a core template:
```hbs
<PluginOutlet @name="site-logo" @defaultGlimmer={{true}} @outletArgs={{hash title=title}}>
<h1>This is the default core implementation: {{title}}</h1>
</PluginOutlet>
```
A plugin/theme can then register a connector for the `site-logo` outlet:
```hbs
{{! connectors/site-logo/my-site-logo-override.hbs }}
<h2>This is the plugin implementation: {{@outletArgs.title}}</h2>
```
Care should be taken when introducing new wrapper PluginOutlets. We need to ensure that
1) They are properly sized. In general it's preferable for each outlet to wrap a small amount of core code, so that plugin/themes only need to re-implement what they want to change
2) The `@outletArgs` are carefully chosen. It may be tempting to pass through lots of core implementation into the outletArgs (or worse, use `this` to pass a reference to the wrapping component/controller). Doing this will significantly increase the API surface area, and make it hard to refactor core. Instead, we should aim to keep `@outletArgs` to a minimum, even if that means re-implementing some very simple things in themes/plugins.
Discourse is the online home for your community. We offer a 100% open source community platform to those who want complete control over how and where their site is run.
Our platform has been battle-tested for over a decade and continues to evolve to meet users’ needs for a powerful community platform. Discourse allows you to create discussion topics and connect using real-time chat, as well as access an ever-growing number of official and community themes. In addition, we offer a wide variety of plugins for features ranging from chatbots powered by Discourse AI to functionalities like SQL analysis using the Data Explorer plugin.
To learn more, visit discourse.org and join our support community at meta.discourse.org.
Screenshots
Browse lots more notable Discourse instances.
Development
To get your environment set up, follow the community setup guide for your operating system.
- If you're on macOS, try the macOS development guide.
- If you're on Ubuntu, try the Ubuntu development guide.
- If you're on Windows, try the Windows 10 development guide.
- If you're looking to use a simpler Docker-based install, try the Docker development guide.
If you're familiar with how Rails works and are comfortable setting up your own environment, you can also try out the Discourse Advanced Developer Guide, which is aimed primarily at Ubuntu and macOS environments.
Before you get started, ensure you have the following minimum versions: Ruby 3.2+, PostgreSQL 13, Redis 7. If you're having trouble, please see our TROUBLESHOOTING GUIDE first!
Setting up Discourse
If you want to set up a Discourse forum for production use, see our Discourse Install Guide.
If you're looking for official hosting, see discourse.org/pricing.
Requirements
Discourse is built for the next 10 years of the Internet, so our requirements are high.
Discourse supports the latest, stable releases of all major browsers and platforms:
| Browsers | Tablets | Phones |
|---|---|---|
| Apple Safari | iPadOS | iOS |
| Google Chrome | Android | Android |
| Microsoft Edge | ||
| Mozilla Firefox |
Additionally, we aim to support Safari on iOS 15.7+.
Built With
- Ruby on Rails — Our back end API is a Rails app. It responds to requests RESTfully in JSON.
- Ember.js — Our front end is an Ember.js app that communicates with the Rails API.
- PostgreSQL — Our main data store is in Postgres.
- Redis — We use Redis as a cache and for transient data.
- BrowserStack — We use BrowserStack to test on real devices and browsers.
Plus lots of Ruby Gems, a complete list of which is at /main/Gemfile.
Contributing
Discourse is 100% free and open source. We encourage and support an active, healthy community that accepts contributions from the public – including you!
Before contributing to Discourse:
- Please read the complete mission statements on discourse.org. Yes we actually believe this stuff; you should too.
- Read and sign the Electronic Discourse Forums Contribution License Agreement.
- Dig into CONTRIBUTING.MD, which covers submitting bugs, requesting new features, preparing your code for a pull request, etc.
- Always strive to collaborate with mutual respect.
- Not sure what to work on? We've got some ideas.
We look forward to seeing your pull requests!
Security
We take security very seriously at Discourse; all our code is 100% open source and peer reviewed. Please read our security guide for an overview of security measures in Discourse, or if you wish to report a security issue.
The Discourse Team
The original Discourse code contributors can be found in AUTHORS.MD. For a complete list of the many individuals that contributed to the design and implementation of Discourse, please refer to the official Discourse blog and GitHub's list of contributors.
Copyright / License
Copyright 2014 - 2023 Civilized Discourse Construction Kit, Inc.
Licensed under the GNU General Public License Version 2.0 (or later); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or at:
https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Discourse logo and “Discourse Forum” ®, Civilized Discourse Construction Kit, Inc.
Accessibility
To guide our ongoing effort to build accessible software we follow the W3C’s Web Content Accessibility Guidelines (WCAG). If you'd like to report an accessibility issue that makes it difficult for you to use Discourse, email accessibility@discourse.org. For more information visit discourse.org/accessibility.
Dedication
Discourse is built with love, Internet style.