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CONTRIBUTING.md

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Contributing

Thank you for your interest in contributing to Diez! The following guidelines should help you get up to speed as a code contributor.

Setup

The Diez monorepo is built with NodeJS 10.16.3 and Yarn 1.19.1. The following commands should bootstrap the monorepo and get you ready for development:

  • Get NVM:

    curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash

  • Install NodeJS 10.16.3:

    nvm install 10.16.3
nvm alias default 10.16.3

  • Install Yarn 1.19.1:

    curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.19.1

  • Install dependencies and compile sources:

    yarn

You will also need to follow the macOS instructions to ensure that all of the examples and tests can run.

Contributing code

To contribute code to Diez, please submit a pull request to the Diez monorepo. Your pull request should:

  • Use conventional commits (Angular style) to describe it.
    • Be sure to prefix your PR title with feat:, fix:, perf:, etc. if you want your change to be included in the Diez changelog.
      • The following prefix tags are supported:
        • feat: for Features
        • fix: for Bug Fixes
        • perf: for Performance Improvements
        • revert: for Reverts
        • docs: for Documentation
        • style: for Styles
        • refactor: for Code Refactoring
        • test: for Tests
        • build: for Build System
        • ci: for Continuous Integration
    • Describe the intent and impact of your change in its description using the imperative present tense.
    • Outline any breaking changes at the bottom of its description with the BREAKING CHANGE: prefix.
  • Be branched from a recent commit to master.
  • Ideally include meaningful tests, especially if newly contributed code is not covered by existing tests.
  • Pass our rigorous continuous integration health checks.

Most, but not all, of the automated health checks can be run by entering yarn health in the monorepo root.

Coding guidelines

The complete programmatic API for every in the monorepo package should be exported by the main file in src/index.ts—and accordingly, you should always import cross-package dependencies from the dependent package's name. i.e.

import {utility} from '@diez/package-name'; // Yes!
import {utility} from '@diez/package-name/lib/utils'; // No!

All exported module members must include documentation. We generate our documentation using TypeDoc; you can find instructions for writing proper documentation with TypeDoc here. A value should not be exported unless it needs to be used in another module.

Most packages document their internal types (interfaces, typealiases, enums, etc.) in a file located at src/api.ts, and provide their internal/shared utilities in a file located at src/utils.ts.

All other coding guidelines should be enforced by our linting rules. You can lint a package (or the entire monorepo) by running yarn lint, and request that the linter automatically fix all automatically fixable issues by running yarn fix.

Third-party dependencies

When introducing any new third party dependencies to this project, please remember to update NOTICE.md accordingly. The exact procedure will depend on the license of the new software but in general:

  • If the software is licensed using MIT, X11, BSD, ISC, or similar, you are not obligated to list the project in NOTICE.md, although you may do so if you wish.
  • If the software is licensed under Apache License 2.0, add a new item under the Apache License, including the name and a link to the project alongside copyright attributions.
  • If the software is licensed using another license, please check the attribution requirements for that license.

Maintainer Guidelines

After a pull request has been approved by a maintainer and all health checks have passed, a maintainer should ensure that they perform the merge considering the following:

  • The merge title should match the PR's title followed by the pull request number (e.g. feat: feature (#42)). This should be the default value populated by the GitHub PR interface.
  • The description of the PR should be copied to the body of the merge description.
  • The pull request should be squashed and merged.