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CONTRIBUTING.md

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Hi (future) collaborator!

tl;dr;

  • submit pull requests to develop branch
  • use conventional changelog commit style messages
  • squash your commits
  • have fun

Table of Contents

Where to start?

Have a fix or a new feature? Search for corresponding issues first then create a new one.

Always check the status of the develop branch for the freshest code.

Always submit pull requests to the develop branch.

Wanna help us? All issues belonging to the next milestone can be worked on.

New API proposal

If you have a new API proposal or change, create an issue describing it precisely:

  • JavaScript API example
  • Resulting DOM/effect

Here's an example: New widget: hitsPerPageSelector (#331).

How to write issues

Start with some context, when and/or where you encountered the issue.

Since instantsearch.js is a UI library, if your issue is UI related then adding a screenshot or (better) a GIF will make your issue a lot easier to understand.

Development workflow

Requirements:

Rapidly iterate with our example app:

npm run dev

Run the tests and lint:

npm test

Launch the website docs dev tool:

npm run dev:docs

Adding/Updating a package

We use a specific shrinkwrapping tool and npm@2.

npm install
npm install package --save[-dev]
npm run shrinkwrap

Removing a package

npm install
npm remove package --save[-dev]
npm run shrinkwrap

Commit message guidelines

We use conventional changelog to generate our changelog from our git commit messages.

Some examples:

  • feat(rangeSlider): add new range option to the rangeSlider
  • fix(refinementList): send the full algolia result to the noResults template

Here are the rules to write commit messages, they are the same than angular/angular.js.

Each commit message consists of a header, a body and a footer. The header has a special format that includes a type, a scope and a subject:

<type>(<scope>): <subject>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>

The header is mandatory and the scope of the header is optional.

Any line of the commit message cannot be longer 100 characters! This allows the message to be easier to read on GitHub as well as in various git tools.

Revert

If the commit reverts a previous commit, it should begin with revert: , followed by the header of the reverted commit. In the body it should say: This reverts commit <hash>., where the hash is the SHA of the commit being reverted.

Type

Must be one of the following:

  • feat: A new feature
  • fix: A bug fix
  • docs: Documentation only changes
  • style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
  • refactor: A code change that neither fixes a bug nor adds a feature
  • perf: A code change that improves performance
  • test: Adding missing tests
  • chore: Changes to the build process or auxiliary tools and libraries such as documentation generation

Scope

The scope could be anything specifying place of the commit change. For example RefinementList, refinementList, rangeSlider, CI, url, build etc...

Subject

The subject contains succinct description of the change:

  • use the imperative, present tense: "change" not "changed" nor "changes"
  • don't capitalize first letter
  • no dot (.) at the end

Body

Just as in the subject, use the imperative, present tense: "change" not "changed" nor "changes". The body should include the motivation for the change and contrast this with previous behavior.

Footer

The footer should contain any information about Breaking Changes and is also the place to reference GitHub issues that this commit Closes.

Breaking Changes should start with the word BREAKING CHANGE: with a space or two newlines. The rest of the commit message is then used for this.

Stash your commits

Once you are done with a fix or feature and the review was done, squash your commits to avoid things like "fix dangling comma in bro.js", "fix after review"

Example: - feat(widget): new feature blabla.. - refactor new feature blablabla... - fix after review ...

  • *both commits should be squashed in a single commit: feat(widget) ..

When are issues closed?

Once the a fix is done, having the fix in the develop branch is not sufficient, it needs to be part of a release for us to close the issue.

So that you never ask yourself "Is this released?".

Instead of closing the issue, we will add a ✔ to be released label.

Milestones

  • next => Ideas, questions, refactors, bugs that were discuseed, turned into clear actions by the maintainers. You can work on this.
  • x.x.x => selected next actions to be done in a release. You can work on this.
  • no milestone => Still need investigation / discussion

Releasing

If you are a maintainer, you can release.

We use semver.

This task will merge develop into master.

Hotfixes

All our work is done on the develop branch but it could be necessary to push a hotfix to the master branch and do a patch release. To fix a very important bug.

For this, you should:

  • add HOTFIX to the commit message body
  • submit your pull request to the master branch

Releasing hotfixes

You must be on the master branch.

HOTFIX=1 npm run release

Documentation updates

If you have important documentation update to release without wanting to release a new version of instantsearch.js, you can do a documentation hotfix.

Then once the hotfix is merged into master, the documentation will be updated automatically.