Merge pull request #229 from quantified-uncertainty/contributing-april-update

Update CONTRIBUTING.md
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Ozzie Gooen 2022-04-12 06:50:43 -04:00 committed by GitHub
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@ -51,4 +51,79 @@ See [here](https://github.com/NixOS/nixpkgs/issues/107375)
# Pull request protocol # Pull request protocol
Please work against `staging` branch. **Do not** work against `master`. Please do not merge without approval from some subset of Quinn, Sam, and Ozzie; they will be auto-pinged. Please work against `staging` branch. **Do not** work against `master`. Please do not merge without approval from some subset of Quinn, Sam, and Ozzie; they will be auto-pinged.
# Code Quality
- Aim for at least 8/10* quality in ``/packages/squiggle-lang``, and 7/10 quality in ``/packages/components``.
- If you submit a PR that is under a 7, for some reason, describe the reasoning for this in the PR.
* This quality score is subjective.
# Rescript Style
**Use `->` instead of `|>`**
Note: Our codebase used to use `|>`, so there's a lot of that in the system. We'll gradually change it.
**Use `x -> y -> z` instead of `let foo = y(x); let bar = z(foo)`**
**Don't use anonymous functions with over three lines**
Bad:
```rescript
foo
-> E.O.fmap(r => {
let a = 34;
let b = 35;
let c = 48;
r + a + b + c
}
```
Good:
```rescript
let addingFn = (r => {
let a = 34;
let b = 35;
let c = 48;
r + a + b + c
}
foo -> addingFn
```
**Write out types for everything, even if there's an interface file**
We'll try this for one month (ending May 5, 2022), then revisit.
**Use the Rescript optional default syntax**
Rescript is clever about function inputs. There's custom syntax for default and optional arguments. In the cases where this applies, use it.
From https://rescript-lang.org/docs/manual/latest/function:
```rescript
// radius can be omitted
let drawCircle = (~color, ~radius=?, ()) => {
setColor(color)
switch radius {
| None => startAt(1, 1)
| Some(r_) => startAt(r_, r_)
}
}
```
**Use named arguments**
If a function is called externally (in a different file), and has either:
1. Two arguments of the same type
2. Three paramaters or more.
**Module naming: Use x_y as module names**
For example: ``Myname_Myproject_Add.res``. Rescript/Ocaml both require files to have unique names, so long names are needed to keep different parts separate from each other.
See [this page](https://dev.to/yawaramin/a-modular-ocaml-project-structure-1ikd) for more information. (Though note that they use two underscores, and we do one. We might refactor that later.
**Module naming: Don't rename modules**
We have some of this in the Reducer code, but generally discourage it.
**Use interface files (.resi) for files with very public interfaces**
### Recommended Rescript resources
- https://dev.to/yawaramin/a-modular-ocaml-project-structure-1ikd
- https://github.com/avohq/reasonml-code-style-guide
- https://cs.brown.edu/courses/cs017/content/docs/reasonml-style.pdf
- https://github.com/ostera/reason-design-patterns/