rollup-plugin-json-map-keys/index.js

Rollup plugin to replace json values with the key path.

const jsonParser = require("json-map-keys")
const { createFilter, dataToEsm } = require('@rollup/pluginutils')
const { interpolateName } = require("loader-utils");


const mapKeys = (opts) => {
  const filter = createFilter(opts && opts.include, opts && opts.exclude);

  return {
    name: 'json-map-keys',
    transform(code, id) {
      if (id.slice(-5) !== '.json' || !filter(id)) return null;

      let prefix = "";
      if (opts && opts.prefix) {
        prefix = interpolateName(
          { resourcePath: id },
          opts.prefix,
          {
            code,
          }
        );
      }

      const parsed = jsonParser(JSON.parse(code), prefix)

      return {
        code: dataToEsm(parsed, {
          compact: opts.compact,
          namedExports: false,
        }),
        map: { mappings: '' }
      };

    }
  };
};

module.exports = mapKeys;