🎉 Tool for generation catalog schema from OpenAPI definition file (#5734

)

* Add tool for generating catalog json schema from openapi definition file

docs/connector-development/cdk-python/schemas.md

@@ -9,6 +9,9 @@ The schema of a stream is the return value of `Stream.get_json_schema`.
 By default, `Stream.get_json_schema` reads a `.json` file in the `schemas/` directory whose name is equal to the value of the `Stream.name` property. In turn `Stream.name` by default returns the name of the class in snake case. Therefore, if you have a class `class EmployeeBenefits(HttpStream)` the default behavior will look for a file called `schemas/employee_benefits.json`. You can override any of these behaviors as you need.
 
 Important note: any objects referenced via `$ref` should be placed in the `shared/` directory in their own `.json` files.
+
+### Generating schemas from OpenAPI definitions
+If you are implementing a connector to pull data from an API which publishes an [OpenAPI/Swagger spec](https://swagger.io/specification/), you can use a tool we've provided for generating JSON schemas from the OpenAPI definition file. Detailed information can be found [here](https://github.com/airbytehq/airbyte/tree/master/tools/openapi2jsonschema/).
 
 ## Dynamic schemas
 If you'd rather define your schema in code, override `Stream.get_json_schema` in your stream class to return a `dict` describing the schema using [JSONSchema](https://json-schema.org).
@@ -21,3 +24,4 @@ def get_json_schema(self):
     schema['dynamically_determined_property'] = "property"
     return schema
 ```
+

tools/openapi2jsonschema/Dockerfile

@@ -0,0 +1,11 @@
+FROM python:3.7-slim
+
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+
+RUN pip install git+https://github.com/airbytehq/openapi2jsonschema.git@v0.1
+
+RUN mkdir -p /schemas
+
+WORKDIR /schemas
+
+ENTRYPOINT ["/usr/local/bin/openapi2jsonschema"]

tools/openapi2jsonschema/README.md

@@ -0,0 +1,13 @@
+# openapi2jsonschema
+Util for generating catalog schema from OpenAPI definition file. Froked from [openapi2jsonschema](https://github.com/instrumenta/openapi2jsonschema) util with fixes for generating standlone schemas e.g. ones that don't contain reference to another files/resources.
+
+## Usage
+```bash
+$ tools/openapi2jsonschema/run.sh <path to OpenAPI definition file>
+```
+It would  generate set of jsonschema files based on components described on OpenAPI definition and place it on "**schemas**" fodler in current working directory.
+
+ Support OpenAPI v2.0, v3.0 and v3.1. Works with both json and yaml OpenAPI formats.
+
+### Examples
+You can try to run this tool on sample OpenApi definition files located in [exmaples](./examples) directory. That is some OpenAPI files taken from APIs-guru repo [from github](https://github.com/APIs-guru).