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BigChange OpenAPI Linting Rules

Introduction

The repository provides BigChange's OpenAPI linting rules and serves as a companion to our REST style guide (currently held internally). Spectral is a command-line tool that is can lint OpenAPI specifications, used to streamline adoption of our standards and provide a first-class integration experience for developers.

Installation

Spectral requires Node version 14 or later:

yarn global add @stoplight/spectral-cli

Usage

Remote ruleset

You can apply these rules by providing the URL directly on the command line:

spectral lint -r https://raw.githubusercontent.com/BigChangeApps/openapi-linting/main/rest/.spectral.yaml petstore.yaml

Local ruleset

For added flexibility and the ability to extend the ruleset we provide, we recommend that you create a local spectral ruleset (.spectral.yml) that remotely references this one:

extends: 
- https://raw.githubusercontent.com/BigChangeApps/openapi-linting/main/rest/.spectral.yaml

Additional rules can then be added, rules can be turned off and warning severities can be adjusted locally:

extends: 
- https://raw.githubusercontent.com/BigChangeApps/openapi-linting/main/rest/.spectral.yaml 

rules:
 response-fail-support-problem-json: off
 schema-properties-documentation-missing: warn

 contact-properties:
   description: Contact object must have "name"
   given: $.info.contact
   severity: warn
   then:
     - field: name
       function: truthy

Rule application

This tooling can be applied to any REST API that provides an OpenAPI specification, regardless of the language used to build that service.

As a command-line tool, it can easily be inserted into existing continuous integration solutions (after an up to date OpenAPI specification file has been built) and for best developer experience, we additionally recommend using githooks for more immediate linting feedback. Consider solutions like Husky and Husky.Net for management of githooks for your projects.