flatten-json.js

var refParser = require('json-schema-ref-parser');
const fs = require('fs');
const path = require('path');
const jsonPath = process.argv[2] || './schemas';
const distPath = process.argv[3] || './dist';
const prefix = process.argv[4] || '';
const beautify = require('js-beautify').js_beautify;

fs.readdir(jsonPath, (err, filenames) => {
    if (err)  {
        console.log(err);
        throw err;
    }
    filenames.forEach(processFile);
});

function processFile(filename) {
    if (filename.indexOf('.json') === -1) {
        return;
    }
    refParser
        .dereference(jsonPath + '/' + filename)
        .then(onDeference)
        .catch(err => {
            console.log(err);
            throw err;
        });

    function onDeference(schema) {
        const flattenedSchema = beautify(JSON.stringify(schema), { indent_size: 2 });
        const des = distPath + '/' + prefix + filename;

        fs.writeFile(des, flattenedSchema, (err) => {
            if (err) {
              console.log(err);
              throw err;
            }
        });
    }
}