Silvermine ESLint Rules


What?

Shareable ESLint configuration for all Silvermine projects.

Why?

Because we need it. Whitespace errors are evil. As are the other hundreds of
types of errors this protects us from.

Running ESLint

It is recommended to run ESLint via a NPM script in package.json with the command
eslint . for projects that use this configuration.

Example:

``json
{
"scripts": {
"eslint": "eslint ."
}
}
`

Other Configuration Files Available

In addition to the ESLint rules, this package provides configuration for the following:

* EditorConfig
* Provides a default set of editor configuration values to use in Silvermine projects
* Usage: Symlink the .editorconfig file to the root of your project and use the
appropriate extension for your editor.
* ln -s ./node_modules/@silvermine/eslint-config/.editorconfig
* commitlint
* Provides linting for commit messages of Silvermine projects
* Usage: Add a commitlint.config.js file to the root of the project with the
following and then set up commitlint in the project:

`javascript
'use strict';

module.exports = {
extends: [ '@silvermine/eslint-config/commitlint' ],
};
`

Notes on Semantic Versioning

See the [notes we made in eslint-plugin-silvermine][semver-notes] regarding our use of
version numbers here. The same decisions made for that repo also apply to this repo,
basically for the same reasons.

[semver-notes]: https://github.com/silvermine/eslint-plugin-silvermine/#note-on-semantic-versioning

What version should I use?

When choosing which version of this config to use, consider the following:

* v2.x.x is the newest branch of our config, which allows for ES2015+ features, as well
as TypeScript linting. On new projects, we recommend using this branch of the config.
* v1.x.x is the legacy version of our eslint config. This should primarily be used in
legacy es5 projects and with node version < 8.10.0. It does not allow for many
es2015+ features, such as spread/rest operators and arrow functions.
* The v1.x.x branch is not recommended for use in new projects and will only be
minimally updated with bug fixes to support legacy code.

Updating ESLint

Updating ESLint in this project requires multiple steps across both this project and
@silvermine/eslint-plugin:

1. Open a PR to update ESLint in @silvermine/eslint-plugin
* Note: Linting in the @silvermine/eslint-plugin PR will likely fail because
@silvermine/eslint-plugin's version of @silvermine/eslint-config is incompatible with
the new version of ESLint. That's ok. We will fix it soon in a subsequent step.
2. After the PR from step 1 is merged, update @silvermine/eslint-plugin in
@silvermine/eslint-config using a git+https` + git hash URL. The git hash should point
to the commit in @silvermine/eslint-plugin where you updated ESLint.
3. Update ESLint in @silvermine/eslint-config. Open a PR that contains this update and
the @silvermine/eslint-plugin update from step 2.
* Note: All of the linting and tests in this build should pass.
4. Publish a new version of @silvermine/eslint-config to the NPM registry
5. Update @silvermine/eslint-config in @silvermine/eslint-plugin to the version that was
just published
* Note: All of the linting and tests in this build should now pass.
6. Publish a new version of @silvermine/eslint-plugin to the NPM registry
7. Update @silvermine/eslint-plugin in @silvermine/eslint-config using the version that was
just published

License

This software is released under the MIT license. See the license
file for more details.