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Amplify Codegen

Amplify Codegen is a JavaScript toolkit library for frontend and mobile developers building amplify applications. Packages are mainly used for frontend code generation including:

Package	Description
amplify-codegen	Amplify plugin for code generation
appsync-modelgen-plugin	Model generator for Amplify Datastore
graphql-docs-generator	Generates statements from GraphQL schema
graphql-types-generator	Generates type annotations from GraphQL schema and statements

Developing

This section should get you running with Amplify Codegen. You will need to set nodejs to a version less than v16 on your system. Developing locally also requires yarn.

Start by Forking the main branch of amplify-codegen.

$ git clone git@github.com:[username]/amplify-codegen.git
$ cd amplify-codegen

$ yarn setup-dev

To generate model files in an Amplify app using the local version of codegen, run amplify-dev codegen models in an Amplify app.

Before pushing code or sending a pull request, do the following:

• At the command line, run npm run lint at the top-level directory. This invokes lerna to check for lint errors in all of our packages.
• You can use eslint to fix some of the lint errors. To use it, go to the package that has errors and run lint-fix
• If there are any remaining lint errors, resolve them manually. Linting your code is a best practice that ensures good code quality so it's important that you don't skip this step.

Troubleshooting

Errors sometimes occur when a different version of amplify-cli-core is installed, typically during the time the CLI is updated. To resolve the error, execute the following command from the top-level directory:

rm -rf yarn.lock && yarn clean && yarn setup-dev

Contributing

See the contribution guideline. https://github.com/aws-amplify/amplify-codegen/blob/main/CONTRIBUTING.md