Extracting GraphQL definitions from code files

@graphql-tools/graphql-tag-pluck will take JavaScript code as an input and will pluck all template literals provided to graphql-tag.

Input:

import gql from 'graphql-tag';

const fragment = gql`
  fragment Foo on FooType {
    id
  }
`;

const doc = gql`
  query foo {
    foo {
      ...Foo
    }
  }

  ${fragment}
`;

Output:

fragment Foo on FooType {
  id
}

query foo {
  foo {
    ...Foo
  }
}

Originally created because of https://graphql-code-generator.com/.

Usage#

@graphql-tools/graphql-tag-pluck is installable via NPM (or Yarn):

$ npm install @graphql-tools/graphql-tag-pluck

Once installed you can pluck GraphQL template literals using one of the following methods:

import { gqlPluckFromCodeStringSync, gqlPluckFromCodeString } from '@graphql-tools/graphql-tag-pluck';

// Returns promise
gqlPluckFromCodeString(
    filePath,  // this parameter is required to detect file type
    fs.readFileSync(filePath, 'utf8'),
);

// Returns string
gqlPluckFromCodeStringSync(
    filePath,
    fs.readFileSync(filePath, 'utf8'),
);

Template literals leaded by magic comments will also be extracted :-)

/* GraphQL */ `
  enum MessageTypes {
    text
    media
    draftjs
  }
`;

supported file extensions are: .js, .jsx, .ts, .tsx, .flow, .flow.js, .flow.jsx, .graphqls, .graphql, .gqls, .gql.

Options#

It is recommended to look at the source code for a clearer understanding of the transformation options.

gqlMagicComment
The magic comment anchor to look for when parsing GraphQL strings. Defaults to graphql, which may be translated into /* GraphQL */ in code.
globalGqlIdentifierName
Allows to use a global identifier instead of a module import.
// `graphql` is a global function
export const usersQuery = graphql`
{
users {
id
name
}
}
`;
modules
An array of packages that are responsible for exporting the GraphQL string parser function. The following modules are supported by default:
{
modules: [
{
// import gql from 'graphql-tag'
name: 'graphql-tag',
},
{
name: 'graphql-tag.macro',
},
{
// import { graphql } from 'gatsby'
name: 'gatsby',
identifier: 'graphql',
},
{
name: 'apollo-server-express',
identifier: 'gql',
},
{
name: 'apollo-server',
identifier: 'gql',
},
{
name: 'react-relay',
identifier: 'graphql',
},
{
name: 'apollo-boost',
identifier: 'gql',
},
{
name: 'apollo-server-koa',
identifier: 'gql',
},
{
name: 'apollo-server-hapi',
identifier: 'gql',
},
{
name: 'apollo-server-fastify',
identifier: 'gql',
},
{
name: ' apollo-server-lambda',
identifier: 'gql',
},
{
name: 'apollo-server-micro',
identifier: 'gql',
},
{
name: 'apollo-server-azure-functions',
identifier: 'gql',
},
{
name: 'apollo-server-cloud-functions',
identifier: 'gql',
},
{
name: 'apollo-server-cloudflare',
identifier: 'gql',
},
];
}