Merge pull request #905 from NoRedInk/derek/newbie-readme

Add a getting started section and reorganize...
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@ -2,50 +2,48 @@
UI widgets we use.
## Versioning policy
## Getting Started
1. Setup your [development environment](#developing-with-nix)
2. Run some [tests](#tests)
3. Check out [some examples](https://noredink-ui.netlify.app/)
We try to avoid breaking changes and the associated major version bumps in this package. The reason for that is to avoid the following scenario:
## Developing with Nix
```
|
x 4.6.0: Adding RadioButton widget
|
x 5.0.0: Breaking change in the TextArea widget
|
x 5.0.1: Styling fix in the Checkbox widget
|
```
You can develop this package without installing anything globally by using Nix.
To get started, install nix from [nixos.org/nix](https://nixos.org/nix/).
Suppose you just released version `5.0.1`, a small styling fix in the checkbox widget, for a story you're working on. If the project you're working in currently pulls in `noredink-ui` at version `4.x`, then getting to your styling fix means pulling in a new major version of `noredink-ui`. This breaks all `TextArea` widgets across the project, so those will need to be fixed before you can do anything else, potentially a big effort.
After that's set up in your shell (just follow the instructions at the end of the installation script) you can run `nix-shell` to get a development environment with everything you need.
To prevent these big Yaks from suddenly showing up in seemingly trivial tasks we prefer to avoid breaking changes in the package. Instead when we need to make a breaking change in a widget, we create a new module for it `Nri.Ui.MyWidget.VX`. Similarly, when we build custom elements in JavaScript we create a file `lib/MyWidget/VX.js` and define a custom element `nri-mywidget-vX`.
If you find that inconvenient, try using [`direnv`](https://direnv.net/).
Once that's set up, `echo use nix > .envrc` and then `direnv allow`.
Anytime you enter the project your shell will automatically pick up the right dependencies.
That said, we may prune unused modules occasionally.
If you find that `direnv` loads too slow, [there are faster loading strategies than the default in their wiki](https://github.com/direnv/direnv/wiki/Nix).
We should change this process if we feel it's not working for us!
### Working with upstream dependencies
## Moving Widgets to `noredink-ui`
We use `niv` to manage Nix dependencies.
It is automatically loaded in the Nix environment.
If you are moving in a widget from the monolith:
- Copy the contents of `Nri.SomeModule` and its tests to `Nri.Ui.SomeModule.V1` in `noredink-ui`
- Publish!
- If you feel confident upgrading pre-existing usages of the widget, switch over to it everywhere!
- If the new version introduces big changes and you'd rather keep the old one around for now, rename `Nri.SomeModule` to `Nri.DEPRECATEDSomeModule` in the monolith and start using `Nri.Ui.SomeModule.V1` where you need it
Here are some things you might need to do:
| Task | Command |
|------|---------|
| Add a non-npm, non-Elm dependency packaged with Nix | Look if it's in nixpkgs, or `niv add github.com/user/repo` |
| Update Nixpkgs | `niv update nixpkgs` |
| See all our dependencies | Look in `shell.nix` |
| See all our sources | `niv show` |
## Phasing out old versions
## Tests
Our goal is to gradually move to the newest version of each widget, and remove the old versions when they are no longer used.
Run tests with
- `shake test`
- `elm-test`
This means:
- We should avoid introducing new references to old versions of a widget
- When touching code that uses a widget, prefer upgrading to the latest version
- If you introduce a new version of a widget, please consider taking the time to upgrade all previous usages
- If for some reason this isn't feasible, create a story in your team's backlog so that you can prioritize it separately without disrupting your current work
- You can delete an old version of a widget when there are no usages left
- Currently, `noredink-ui` is used by the monolith, CCS and tutorials
- Note: this will be a major version bump, so you may want to batch deletions together
### CI (Travis)
Travis will run `shake ci` to verify everything looks good.
You can run this locally to catch errors before you push!
## Examples
@ -59,19 +57,6 @@ script/develop.sh
If you'd like to test your widget in the monolith before publishing, run `script/test-elm-package.py ../path_to_this_repo` from the monolith's directory.
## Tests
Run tests with
```
shake test
```
### CI (Travis)
Travis will run `shake ci` to verify everything looks good.
You can run this locally to catch errors before you push!
## Deploying
Once your PR is merged, you can publish `master` as a new version:
@ -121,29 +106,46 @@ You can also add a tag in https://github.com/NoRedInk/noredink-ui/releases/new i
Once you've published, you should see the latest version at <https://package.elm-lang.org/packages/NoRedInk/noredink-ui/>.
## Developing with Nix
## Versioning policy
You can develop this package without installing anything globally by using Nix.
To get started, install nix from [nixos.org/nix](https://nixos.org/nix/).
We try to avoid breaking changes and the associated major version bumps in this package. The reason for that is to avoid the following scenario:
After that's set up in your shell (just follow the instructions at the end of the installation script) you can run `nix-shell` to get a development environment with everything you need.
```
|
x 4.6.0: Adding RadioButton widget
|
x 5.0.0: Breaking change in the TextArea widget
|
x 5.0.1: Styling fix in the Checkbox widget
|
```
If you find that inconvenient, try using [`direnv`](https://direnv.net/).
Once that's set up, `echo use nix > .envrc` and then `direnv allow`.
Anytime you enter the project your shell will automatically pick up the right dependencies.
Suppose you just released version `5.0.1`, a small styling fix in the checkbox widget, for a story you're working on. If the project you're working in currently pulls in `noredink-ui` at version `4.x`, then getting to your styling fix means pulling in a new major version of `noredink-ui`. This breaks all `TextArea` widgets across the project, so those will need to be fixed before you can do anything else, potentially a big effort.
If you find that `direnv` loads too slow, [there are faster loading strategies than the default in their wiki](https://github.com/direnv/direnv/wiki/Nix).
To prevent these big Yaks from suddenly showing up in seemingly trivial tasks we prefer to avoid breaking changes in the package. Instead when we need to make a breaking change in a widget, we create a new module for it `Nri.Ui.MyWidget.VX`. Similarly, when we build custom elements in JavaScript we create a file `lib/MyWidget/VX.js` and define a custom element `nri-mywidget-vX`.
### Working with upstream dependencies
That said, we may prune unused modules occasionally.
We use `niv` to manage Nix dependencies.
It is automatically loaded in the Nix environment.
We should change this process if we feel it's not working for us!
Here are some things you might need to do:
## Moving Widgets to `noredink-ui`
| Task | Command |
|------|---------|
| Add a non-npm, non-Elm dependency packaged with Nix | Look if it's in nixpkgs, or `niv add github.com/user/repo` |
| Update Nixpkgs | `niv update nixpkgs` |
| See all our dependencies | Look in `shell.nix` |
| See all our sources | `niv show` |
If you are moving in a widget from the monolith:
- Copy the contents of `Nri.SomeModule` and its tests to `Nri.Ui.SomeModule.V1` in `noredink-ui`
- Publish!
- If you feel confident upgrading pre-existing usages of the widget, switch over to it everywhere!
- If the new version introduces big changes and you'd rather keep the old one around for now, rename `Nri.SomeModule` to `Nri.DEPRECATEDSomeModule` in the monolith and start using `Nri.Ui.SomeModule.V1` where you need it
## Phasing out old versions
Our goal is to gradually move to the newest version of each widget, and remove the old versions when they are no longer used.
This means:
- We should avoid introducing new references to old versions of a widget
- When touching code that uses a widget, prefer upgrading to the latest version
- If you introduce a new version of a widget, please consider taking the time to upgrade all previous usages
- If for some reason this isn't feasible, create a story in your team's backlog so that you can prioritize it separately without disrupting your current work
- You can delete an old version of a widget when there are no usages left
- Currently, `noredink-ui` is used by the monolith, CCS and tutorials
- Note: this will be a major version bump, so you may want to batch deletions together