gatsby-codemods

gatsby-codemods

A collection of codemod scripts for use with JSCodeshift that help migrate to newer versions of Gatsby.

Note: Codemods are designed to rewrite your project's files. Ensure you have a backup before going any further.

Setup & Run

• Install JSCodeshift as a global module

npm install --global jscodeshift

• Install this package

npm install gatsby-codemods@next

• Run a transform from this package on your project

jscodeshift -t node_modules/gatsby-codemods/transforms/global-graphql-calls.js my-project

Note that jscodeshift tries to match the formatting of your existing code, but you may need to use a tool like prettier to ensure consistency after running these codemods.

Structure of a jscodeshift call:

• jscodeshift -t <codemod-script> <path>
  • codemod-script - path to the transform file, see available scripts below
  • path - files or directory to transform, typically the path to your Gatsby project
  • use the -d option for a dry-run and use -p to print the output for comparison
  • use the --extensions option if your files have different extensions than .js (for example, --extensions js,jsx)
  • see all available jscodeshift options.

Included scripts

global-graphql-calls

Add a graphql import to modules that use the graphql tag function without an import. This was supported in Gatsby v1 and deprecated for Gatsby v2.

See the Gatsby v2 migration guide for details on when to use this.

jscodeshift -t node_modules/gatsby-codemods/dist/transforms/global-graphql-calls.js <path>

Example result:

import React from "react"
+ import { graphql } from "gatsby"

export default ({ data }) => (
  <h1>{data.site.siteMetadata.title}</h1>
)

export const query = graphql`
  query {
    site {
      siteMetadata {
        title
      }
    }
  }
`

More scripts

Check out issue 5038 in the Gatsby repo for additional codemod ideas.

We'd love your help with writing these!