action.json

{
    "$id": "asset_action",
    "title": "Action",
    "properties": {
        "type": {
            "const": "action"
        },
        "label": {
            "$ref": "text_assets"
        }
    }
}

definitions.json

{
    "$id": "def",
    "definitions": {
        "view_gateway": {
            "title": "Gateway",
            "properties": {
                "gatewayActions": {
                    "type": "object",
                    "properties": {
                        "affirmativeAction": {
                            "$ref": "#/definitions/actions"
                        },
                        "negativeAction": {
                            "$ref": "#/definitions/actions"
                        },
                        "prevAction": {
                            "$ref": "#/definitions/actions"
                        }
                    }
                }
            }
        },
        "actions": {
            "title": "Action Asset",
            "type": "object",
            "properties": {
                "asset": {
                    "$ref": "asset_action"
                }
            }
        }
    }
}

merge.js

#!/usr/bin/env node

var _ = require('lodash');
var $RefParser = require("json-schema-ref-parser");
var fs = require('fs');

var mySchema = require('./frf_schema.json');
var definitions = require('./definitions.json');
var assets = require('./assets/index');

const allAssets = [...assets, definitions];

const findSchema = (file) => {
  var id = _.last(file.url.split('/'));

  return _.find(allAssets, function (asset) {
    return asset.$id === id;
  });
}

const myResolver = {
  order: 1,

  canRead: findSchema,
  read: findSchema
};

const fileName = "merged-schema.json";

$RefParser.bundle(mySchema, { resolve: { mongo: myResolver } })
  .then((schema) => (
    fs.writeFile(fileName, JSON.stringify(schema))
  ))
  .then(() => (
    // eslint-disable-next-line no-console
    console.log("Merged Schema saved to:", fileName)
  ))
  .catch((err) => (
    // eslint-disable-next-line no-console
    console.error(err)
  ));

merged.json

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "$id": "root",
    "properties": {
        "views": {
            "type": "array",
            "items": {
                "title": "Gateway",
                "properties": {
                    "gatewayActions": {
                        "type": "object",
                        "properties": {
                            "affirmativeAction": {
                                "$ref": "#/properties/views/items/properties/gatewayActions/properties/prevAction"
                            },
                            "negativeAction": {
                                "$ref": "#/properties/views/items/properties/gatewayActions/properties/prevAction"
                            },
                            "prevAction": {
                                "title": "Action Asset",
                                "type": "object",
                                "properties": {
                                    "asset": {
                                        "$id": "asset_action",
                                        "title": "Action",
                                        "properties": {
                                            "type": {
                                                "const": "action"
                                            },
                                            "label": {
                                                "$id": "text_assets",
                                                "title": "Text Assets",
                                                "description": "A text asset or grouping of text assets.",
                                                "oneOf": [
                                                    {
                                                        "$ref": "#/properties/views/items/properties/gatewayActions/properties/affirmativeAction/properties/asset/properties/label/definitions/switch"
                                                    },
                                                    {
                                                        "$ref": "#/properties/views/items/properties/gatewayActions/properties/affirmativeAction/properties/asset/properties/label/definitions/switch_wrapper"
                                                    }
                                                ],
                                                "definitions": {
                                                    "switch_wrapper": {
                                                        "type": "object",
                                                        "properties": {
                                                            "staticSwitch": {
                                                                "$ref": "#/properties/views/items/properties/gatewayActions/properties/affirmativeAction/properties/asset/properties/label/definitions/switch"
                                                            }
                                                        }
                                                    },
                                                    "asset": {
                                                        "type": "object",
                                                        "$id": "asset_text",
                                                        "title": "Text",
                                                        "description": "The text asset is the most basic type. Text assets are used to convey one or part of a thought to a user. They can be used within any other asset, but cannot contain other assets within.",
                                                        "required": [
                                                            "value"
                                                        ],
                                                        "properties": {
                                                            "type": {
                                                                "const": "text"
                                                            }
                                                        }
                                                    },
                                                    "switch": {
                                                        "type": "array",
                                                        "items": {
                                                            "type": "object",
                                                            "properties": {
                                                                "asset": {
                                                                    "$ref": "#/properties/views/items/properties/gatewayActions/properties/affirmativeAction/properties/asset/properties/label/definitions/asset"
                                                                }
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

root.json

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "$id": "root",
    "properties": {
        "views": {
            "type": "array",
            "items": {
                "$ref": "def#/definitions/view_gateway"
            }
        }
    }
}

text_assets.json

{
  "$id": "text_assets",
  "title": "Text Assets",
  "description": "A text asset or grouping of text assets.",
  "oneOf": [
    {
      "$ref": "#/definitions/switch"
    },
    {
      "$ref": "#/definitions/switch_wrapper"
    }
  ],
  "definitions": {
    "switch_wrapper": {
      "type": "object",
      "properties": {
        "staticSwitch": {
          "$ref": "#/definitions/switch"
        }
      }
    },
    "asset": {
      "type": "object",
      "$ref": "asset_text"
    },
    "switch": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "asset": {
            "$ref": "#/definitions/asset"
          }
        }
      }
    }
  }
}