Writing Shareable Configurations

If you want to reuse the same configuration in multiple projects or just share your preferences with others, you can publish your configuration as package on npm (or any other registry).

Start by creating a new project and adding a index.yaml. You can use any other supported format if you want. You can also use a different name or directory, in which case you need to add the correct path to the main field in the package.json of your package. Resolving the correct file works by using node's module resolution algorithm.

Write the index.yaml like you would write your local .wotanrc.yaml. Keep in mind that all paths and modules are resolved relative to the configuration file.

Here's an example:

---
extends:
  - foo-rules # resolves to the package 'foo-rules', make sure to add this as dependency in your package.json
  - ./base-config.yaml # you can also extend other local configurations
rules:
  core-rule: error # refers to a core rule
  foo/rule-one: error # refers to a custom rule
overrides:
  - files: '*.spec.ts' # globs without any '/' are only matched against the basename, therefore this glob is not relative to the config
    processor: some-processor # resolves to the package 'some-processor', make sure to add this as dependency in your package.json

Assuming you publish your package as wotan-config-unicorn, users can simply add extends: wotan-config-unicorn to their configuration and automatically extend your index.yaml.

Multiple Configurations in one Package

If you have more than one configuration, you can simply add multiple <name>.yaml files to the root of your package. Users can then extend: <your-package>/<name>.

Let's assume you want to publish a recommended and strict configuration preset. Start by adding the recommended.yaml:

rules:
  rule-one: error
  rule-two: error
  rule-three: warning

You can then choose whether you want to extend the recommended config or write the strict configuration from scratch. Let's go with extending for now. Your strict.yaml could look as follows:

extends: ./recommended.yaml
rules:
  rule-one:
    options: strict # overrides only the options of 'rule-one', severity is still 'error'
  rule-three: error # change severity of 'rule-three'
  rule-four: error # enable 'rule-four' in addition

Assuming you publish your package as wotan-config-rainbow, users can choose between extends: wotan-config-rainbow/recommended and extends: wotan-config-rainbow/strict.

If you decide to make recommended the default configuration, add "main": "recommended" to the package.json of your package. Now every user who does extends: wotan-config-rainbow automatically extends your recommended.yaml.