Move fastavro to extras group

Author: cdebost

README.md

@@ -33,12 +33,17 @@ Clone this repository and install it:
 python setup.py install -e .
 ```
 
-This library includes opt-in extra dependencies that enable support for certain features. For example, to use the schema registry with [kafka-python](https://pypi.org/project/kafka-python/), you should install the `kafka-python` extra:
+You most likely want to install one or more extras. For example, to use the schema registry with Avro schemas and [kafka-python](https://pypi.org/project/kafka-python/), you should install the `avro` and `kafka-python` extra:
 
 ```
-python setup.py install -e .[kafka-python]
+python setup.py install -e .[avro, kafka-python]
 ```
 
+Extra name | Purpose
+:--------- | :------
+avro | Allows using Apache Avro schemas, using `fastavro` as a backend
+kafka-python | Provides adapter classes to plug into `kafka-python`
+
 ## Usage
 
 First use `boto3` to create a low-level AWS Glue client:

setup.cfg

@@ -19,7 +19,7 @@ classifiers =
     Programming Language :: Python :: 3.9
     Topic :: Software Development :: Libraries
     Typing :: Typed
-keywords = aws, glue, schema, registry
+keywords = aws, glue, schema, registry, avro
 project_urls =
     Source=https://github.com/DisasterAWARE/aws-glue-schema-registry-python
 
@@ -32,7 +32,6 @@ package_dir =
 python_requires = >=3.7
 install_requires =
     boto3>=1.18.48
-    fastavro>=1.4.5
     typing-extensions>=3.10.0.2;python_version<"3.8"
 setup_requires =
     setuptools
@@ -41,6 +40,8 @@ setup_requires =
 dev =
     pytest>=6
     flake8>=3
+avro =
+    fastavro>=1.4.5
 kafka-python =
     kafka-python>=2
 

tox.ini

@@ -10,7 +10,7 @@ python =
 [testenv]
 deps = pytest
 commands =
-    pip install . .[dev]
+    pip install . .[dev] .[avro] .[kafka-python]
     python -m pytest --ignore tests/integration
 
 [testenv:flake8]
@@ -20,7 +20,7 @@ commands = flake8
 [testenv:mypy]
 deps = mypy
 commands =
-    pip install . .[dev]
+    pip install . .[dev] .[avro] .[kafka-python]
     python -m mypy
 
 [pytest]