Small script to parse GraphQL Schemas and console.log some stats about them

graphql-schema-stats.js

// Place *.graphql files ./schemas folder and update schemas object

const fs = require('fs');
const graphql = require('graphql');

const schemas = [
  { name: 'github', metaQueries: 16 },
  { name: 'gitlab', metaQueries: 7 }
];

const result = {};

schemas.map(({ name, metaQueries }) => {
  const definitions = graphql.parse(
    fs.readFileSync(`./schemas/${name}.graphql`).toString()
  ).definitions;

  const typeReducer = (field) => {
    if (!field) return '';
    if (field.kind === 'NamedType') return field.name.value;

    return typeReducer(field.type);
  };

  const queriesCount = definitions.find(
    (definition) =>
      (definition && definition.name && definition.name.value === 'Query') ||
      (definition && definition.name && definition.name.value === 'QueryRoot')
  ).fields.length;

  const mutationCount = definitions.find(
    (definition) =>
      definition && definition.name && definition.name.value === 'Mutation'
  ).fields.length;

  const typesCount = definitions.length;

  result[name] = {
    businessQueries: queriesCount - metaQueries,
    metaQueries,
    mutationCount,
    typesCount,
    typePerQuery: typesCount / (queriesCount - metaQueries),
  };
});

console.log(result);