130 lines
4.8 KiB
Markdown
130 lines
4.8 KiB
Markdown
_The current document was written quickly and not exhaustively, yet, it's unfinished. [Template here](https://mozillascience.github.io/working-open-workshop/contributing/)_
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# Contributing to Squiggle
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We welcome contributions from developers, especially people in react/typescript, rescript, and interpreters/parsers. We also are keen to hear issues filed by users!
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Squiggle is currently pre-alpha.
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# Quick links
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- [Roadmap to the alpha](https://github.com/QURIresearch/squiggle/projects/2)
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- The team presently communicates via the **EA Forecasting and Epistemics** slack (channels `#squiggle` and `#squiggle-ops`), you can track down an invite by reaching out to Ozzie Gooen
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- [Squiggle documentation](https://www.squiggle-language.com/docs/Language)
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- [Rescript documentation](https://rescript-lang.org/docs/manual/latest/introduction)
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- You can email `quinn@quantifieduncertainty.org` if you need assistance in onboarding or if you have questions
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# Bug reports
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Anyone (with a github account) can file an issue at any time. Please allow Quinn, Sam, and Ozzie to triage, but otherwise just follow the suggestions in the issue templates.
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# Project structure
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Squiggle is a **monorepo** with four **packages**.
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- **components** is where we improve reactive interfacing with Squiggle
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- **playground** is the site `playground.squiggle-language.com`
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- **squiggle-lang** is where the magic happens: probability distributions, the interpreter, etc.
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- **website** is the site `squiggle-language.com`
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# Deployment ops
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We use netlify, and it should only concern Quinn, Sam, and Ozzie.
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# Development environment, building, testing, dev server
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You need `yarn`.
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Being a monorepo, where packages are connected by dependency, it's important to follow `README.md`s closely. Each package has it's own `README.md`, which is where the bulk of information is.
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We aspire for `ci.yaml` and `README.md`s to be in one-to-one correspondence.
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## If you're on NixOS
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You'll need to run a command like this in order to get `yarn build` to run, especially in `packages/squiggle-lang`.
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```sh
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patchelf --set-interpreter $(patchelf --print-interpreter $(which mkdir)) ./node_modules/gentype/gentype.exe
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```
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See [here](https://github.com/NixOS/nixpkgs/issues/107375)
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# Pull request protocol
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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.
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# Code Quality
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- Aim for at least 8/10* quality in ``/packages/squiggle-lang``, and 7/10 quality in ``/packages/components``.
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- If you submit a PR that is under a 7, for some reason, describe the reasoning for this in the PR.
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* This quality score is subjective.
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# Rescript Style
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**Use `->` instead of `|>`**
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Note: Our codebase used to use `|>`, so there's a lot of that in the system. We'll gradually change it.
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**Use `x -> y -> z` instead of `let foo = y(x); let bar = z(foo)`**
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**Don't use anonymous functions with over three lines**
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Bad:
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```rescript
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foo
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-> E.O.fmap(r => {
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let a = 34;
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let b = 35;
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let c = 48;
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r + a + b + c
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}
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```
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Good:
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```rescript
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let addingFn = (r => {
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let a = 34;
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let b = 35;
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let c = 48;
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r + a + b + c
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}
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foo -> addingFn
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```
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**Write out types for everything, even if there's an interface file**
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We'll try this for one month (ending May 5, 2022), then revisit.
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**Use the Rescript optional default syntax**
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Rescript is clever about function inputs. There's custom syntax for default and optional arguments. In the cases where this applies, use it.
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From https://rescript-lang.org/docs/manual/latest/function:
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```rescript
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// radius can be omitted
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let drawCircle = (~color, ~radius=?, ()) => {
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setColor(color)
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switch radius {
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| None => startAt(1, 1)
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| Some(r_) => startAt(r_, r_)
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}
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}
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```
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**Use named arguments**
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If a function is called externally (in a different file), and has either:
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1. Two arguments of the same type
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2. Three paramaters or more.
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**Module naming: Use x_y as module names**
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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.
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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.
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**Module naming: Don't rename modules**
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We have some of this in the Reducer code, but generally discourage it.
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**Use interface files (.resi) for files with very public interfaces**
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### Recommended Rescript resources
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- https://dev.to/yawaramin/a-modular-ocaml-project-structure-1ikd
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- https://github.com/avohq/reasonml-code-style-guide
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- https://cs.brown.edu/courses/cs017/content/docs/reasonml-style.pdf
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- https://github.com/ostera/reason-design-patterns/
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