test: local dev container uses local mount for faster testing (#391)

* test: local dev container uses local mount for faster testing

* doc: update contributing.md for this new feature

* test: have CI still build pgbelt dependencies as part of image to not slow it down

.gitignore

@@ -12,6 +12,7 @@ venv
 build/*
 dist/*
 logs/*
+configs/integrationtest-datacenter/*
 .python-version
 .mypy_cache
 __pycache__/

CONTRIBUTING.md

@@ -81,6 +81,8 @@ Simply run the following to spin the above up and drop yourself into your contai
 
 _Note_: the DC and DB for the above environment are [here](https://github.com/Autodesk/pgbelt/blob/main/tests/integration/conftest.py#L20-L21).
 
+Note: your local code will be _mounted_ to your container instead of copied. This allows you to edit your code on your laptop, then go into the container and run `pip3 install -e .` to update your container's `belt` binary for quick testing iterations.
+
 Once you are done, you can exit out of the above container. Then, for cleanliness, please run the following to clean up `docker` and `docker-compose`:
 
     make clean-docker

docker-compose.yml

@@ -82,14 +82,16 @@ services:
       TEST_PG_DST_PORT: 5432
       TEST_PG_DST_ROOT_USERNAME: postgres
       TEST_PG_DST_ROOT_PASSWORD: postgres
-    command: bash -c "poetry run python3 tests/integration/conftest.py && pip3 install -e . && bash"
+    command: bash -c "cd /pgbelt-volume/ && poetry run python3 tests/integration/conftest.py && pip3 install -e . && bash"
     depends_on:
       db-src:
         condition: service_healthy
       db-dst:
         condition: service_healthy
     networks:
       - datacenter
+    volumes:
+      - ./:/pgbelt-volume/:rw
 
 networks:
   datacenter: