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README.md

GraphQL Doctor

A GitHub App built with Probot that prevent Breaking Changes in a GraphQL API using GitHub Checks API.

Why

When using Continuous Evolution you have to prevent any Breaking Changes to your GraphQL API. That's why we recommend to commit a dump of your GraphQL schema (using SDL) inside your repository (eg: with a pre-commit).

graphql-doctor will use your current schema and compare it with the previous schema (eg: the schema on the master branch) then it guess if you made some Breaking or Dangerous changes !

Example

You can look at this Pull request.

Features

Show issues right in your schema

Found issue in schema

Generate a failure in case of Breaking Changes

Result in Check API

Inspiration

This project was created because we, at Cap Collectif, wanted the same bot as used internally at GitHub. We mostly used xuorig/graphql-schema_comparator as an inspiration.

Configuration

Add the following key to your package.json :

  "graphql-doctor": {
    "schema.public.graphql": {
      "ref": "heads/master",
      "schemaPath": "schema.public.graphql"
    }
  },

This will compare your current schema.public.graphql against schema.public.graphql in the master branch.

Deployment

We don't provide a public application (yet!) but you can easily deploy your own. Internally we are using heroku :

git push heroku master

Contributing

Setup

# Install dependencies
yarn install

# Run the bot
yarn start

# Run tests
yarn test

If you have suggestions for how graphql-doctor could be improved, or want to report a bug, open an issue! Any kind of contributions is greatly appreciated.

For more, check out the Contributing Guide.

License

ISC

Credits

Created by Aurélien David. Sponsored by Cap Collectif.

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Prevent Breaking Changes in a GraphQL API with GitHub Checks

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