Add isort to code check

- We use the 'black' profile within the isort config to make isort
compatible with black, which is also being used in this docker
image.

Dockerfile

@@ -9,9 +9,11 @@ COPY requirements.txt requirements.txt
 RUN pip install -r requirements.txt
 
 COPY config/.flake8 .
+COPY config/.isort.cfg .
 COPY entrypoint.sh /usr/local/bin
 
 ENV DEFAULT_FLAKE8_CONFIG=${APP_ROOT}/.flake8
+ENV DEFAULT_ISORT_CONFIG=${APP_ROOT}/.isort.cfg
 
 VOLUME ${CODE_DIR}
 WORKDIR ${CODE_DIR}

README.md

@@ -1,10 +1,11 @@
 # docker-code-quality
-Docker image for python code quality
+Docker image for checking python code quality
 
 ## Usage
 
-After building the docker image using `./docker.sh build` it can be used to run [flake8](https://flake8.pycqa.org/en/6.0.0/index.html)
-and [black](https://black.readthedocs.io/en/stable/index.html) (in check mode) on a codebase of your choosing.
+After building the docker image using `./docker.sh build` it can be used to run [flake8](https://flake8.pycqa.org/en/6.0.0/index.html),
+[black](https://black.readthedocs.io/en/stable/index.html) and [isort](https://pycqa.github.io/isort/index.html)
+(in check mode) on a codebase of your choosing.
 In particular, assuming you're in the directory of the code you want to check, simply run
 
 ```

config/.isort.cfg

@@ -0,0 +1,3 @@
+[settings]
+py_version=39
+profile=black

entrypoint.sh

@@ -3,5 +3,8 @@
 echo "Running flake8..."
 flake8 --config=$DEFAULT_FLAKE8_CONFIG $CODE_DIR
 
+echo "Running isort --check"
+isort --settings-file=$DEFAULT_ISORT_CONFIG --src=$CODE_DIR --check $CODE_DIR
+
 echo "Running black --check..."
 black --target-version py39 --check $CODE_DIR

requirements.txt

@@ -1,2 +1,3 @@
 black==22.12.0
 flake8==6.0.0
+isort==5.11.1