consul/ui/packages/consul-ui/README.md

# consul-ui

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- [Prerequisites](#prerequisites)
- [Installation](#installation)
- [Yarn Commands](#yarn-commands)
- [Running / Development](#running--development)
  - [Environment Variables](#environment-variables)
  - [Contributing/Engineering Documentation](#contributingengineering-documentation)
  - [Browser 'Debug Utility' Functions and 'Environment' Variables](#browser-debug-utility-functions-and-environment-variables)
  - [Code Generators](#code-generators)
  - [Running Tests](#running-tests)
  - [Linting](#linting)
  - [Building](#building)
    - [Running Tests in Parallel](#running-tests-in-parallel)

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## Prerequisites

You will need the following things properly installed on your computer.

* [Git](https://git-scm.com/)
* [Node.js](https://nodejs.org/) (with npm)

* [yarn](https://yarnpkg.com)
* [Ember CLI](https://ember-cli.com/)
* [Google Chrome](https://google.com/chrome/)

## Installation

* `git clone https://github.com/hashicorp/consul.git` this repository
* `cd ui/packages/consul-ui`

then:

**To run the UI**

From within `ui/packages/consul-ui` directory run:

* `make start`

**To run tests**

From within `ui/packages/consul-ui` directory run:

* `make test-oss-view` which will run the tests in Chrome

(see below and/or the [testing section of the engineering docs](./docs/testing.mdx) for
further detail)

## Yarn Commands

Most used tooling scripts below primarily use `make` which will `yarn install`
and in turn call node package scripts.

List of available project commands.  `yarn run <command-name>`

| Command | Description |
| ------- | ----------- |
| build:staging | Builds the UI in staging mode (ready for PR preview site). |
| build:ci | Builds the UI for CI. |
| build | Builds the UI for production. |
| lint | Runs all lint commands. |
| lint:hbs | Lints `hbs` template files. |
| lint:js | Lints `js` files. |
| format | Runs all auto-formatters. |
| format:js | Auto-formats `js` files using Prettier. |
| format:sass | Auto-formats `scss` files using Prettier. |
| start | Runs the development app on a local server using the mock API. |
| start:consul | Runs the development app local server using a real consul instance as the backend. |
| start:staging | Runs the staging app local server. |
| test | Runs the ember tests in a headless browser. |
| test:view | Runs the ember tests in a non-headless browser. |
| test:oss | Runs only the OSS ember tests in a headless browser. |
| test:oss:view | Runs only the OSS ember tests in a non-headless browser. |
| test:coverage:view | Runs only the test specified for coverage in a non-headless browser. |
| test:node | Runs tests that can't be run in ember using node. |
| doc:toc | Automatically generates a table of contents for this README file. |

## Running / Development

The source code comes with a small development mode that runs enough of the consul API
as a set of mocks/fixtures to be able to run the UI without having to run
consul.

* `make start` or `yarn start` to start the ember app
* Visit your app at [http://localhost:4200](http://localhost:4200).

You can also run the UI against a normal Consul installation.

* `consul server -dev` to start consul listening on http://localhost:8500
* `make start-consul` to start the ember app proxying to `consul` (this will
respect the `CONSUL_HTTP_ADDR` environment variable to locate the Consul
installation.
* Visit your app at [http://localhost:4200](http://localhost:4200).

Example:

```bash
CONSUL_HTTP_ADDR=http://10.0.0.1:8500 make start-consul
```

### Environment Variables

See [./docs/index.mdx](./docs/index.mdx#environment-variables)

### Branching

We follow a `ui/**/**` branch naming pattern. This branch naming pattern allows
front-end focused builds, such as FE tests, to run automatically in Pull
Requests. Please note this only works if you are a member of the HashiCorp
GitHub Org. If you are an external contributor these tests won't run and will
instead be run by a member of our team during review.

Examples:
- `ui/feature/add...`
- `ui/bugfix/fix...`
- `ui/enhancement/update...`

### Contributing/Engineering Documentation

We have an in-app (only during development) component storybook and
documentation site which can be visited using the [Eng
Docs](http://localhost:4200/ui/docs) link in the top navigation of the UI.
Alternatively all of these docs are also readable via GitHub's UI, so folks can
use whatever works best for them.

### Browser 'Debug Utility' Functions and 'Environment' Variables

Run `make start` then visit http://localhost:4200/ui/docs/bookmarklets for a
list of debug/engineering utilities you can use to help development of the UI
under certain scenarios.

### Code Generators

Many classes used in the UI can be generated with ember generators, try `ember help generate` for more details

### Running Tests

Tests use the mock api (see ./mock-api for details), the mock-api runs
automatically during testing, you don't need to run anything separately from
the below commands in order for the tests to use the mock-api.

* `make test` or `yarn run test`
* `make test-view` or `yarn run test:view` to view the tests running in Chrome

For more guidance on running tests, see the [testing section of the engineering docs](./docs/testing.mdx).

OSS only tests can also be run using:

* `make test-oss` or `yarn run test:oss`
* `make test-oss-view` or `yarn run test:oss:view` to view the tests running in Chrome

### Linting

`make lint` currently runs linting on the majority of js files and hbs files (using `ember-template-lint`).

See `.eslintrc.js` and `.eslintignore` for specific configuration.

### Building

* `make build` builds the UI for production usage (env=production)
* `make build-ci` builds the UI for CI/test usage (env=test)

Static files are built into ./dist

#### Running Tests in Parallel

You probably don't need to understand this if you are simply running some
tests locally.

Alternatively, `ember-exam` can be used to split the tests across multiple browser instances for faster results. Most options are the same as `ember test`. To see a full list of options, run `ember exam --help`.

**Note:** The `EMBER_EXAM_PARALLEL` environment variable must be set to override the default `parallel` value of `1` browser instance in [testem.js](./testem.js).

To quickly run the tests across 4 parallel browser instances:
```sh
make test-parallel
```

To run manually:
```sh
$ EMBER_EXAM_PARALLEL=true ./node_modules/.bin/ember exam --split <num> --parallel
```

More ways to split tests can be found in the [ember-exam README.md](https://github.com/trentmwillis/ember-exam/blob/master/README.md).

### Vercel Deploys

A Vercel preview deploy Github action triggers after each pushed change in a pull request. Vercel checks if there was changes within the UI folder in the last commit. If there are no changes the build is cancelled. If the build proceeds it will include a link to the preview deploy in your PRs feed.

If you were to push changes to the UI folder and then immediately follow it up with a change to something outside of the UI folder, the lastest Vercel build will be ignored. Because of this, the preview link will not get posted to the PR feed even if the original Vercel build completes. If that is the case, you may browse the Vercel deploys for the original build.

Another scenario to watch for is when you rebase a series of commits, but the last commit is outside of the UI folder. Doing this will not trigger a new Vercel deploy as the last commit doesn't have any changes in the UI folder.