chore: Auto-detect python version in Makefile (feast-dev#4419)

Makefile

@@ -21,6 +21,7 @@ ifeq ($(shell uname -s), Darwin)
 	OS = osx
 endif
 TRINO_VERSION ?= 376
+PYTHON_VERSION = ${shell python --version | grep -Eo '[0-9]\.[0-9]+'}
 
 # General
 
@@ -37,22 +38,22 @@ build: protos build-java build-docker
 # Python SDK
 
 install-python-ci-dependencies:
-	python -m piptools sync sdk/python/requirements/py$(PYTHON)-ci-requirements.txt
+	python -m piptools sync sdk/python/requirements/py$(PYTHON_VERSION)-ci-requirements.txt
 	pip install --no-deps -e .
 	python setup.py build_python_protos --inplace
 
 install-python-ci-dependencies-uv:
-	uv pip sync --system sdk/python/requirements/py$(PYTHON)-ci-requirements.txt
+	uv pip sync --system sdk/python/requirements/py$(PYTHON_VERSION)-ci-requirements.txt
 	uv pip install --system --no-deps -e .
 	python setup.py build_python_protos --inplace
 
 install-python-ci-dependencies-uv-venv:
-	uv pip sync sdk/python/requirements/py$(PYTHON)-ci-requirements.txt
+	uv pip sync sdk/python/requirements/py$(PYTHON_VERSION)-ci-requirements.txt
 	uv pip install --no-deps -e .
 	python setup.py build_python_protos --inplace
 
 lock-python-ci-dependencies:
-	uv pip compile --system --no-strip-extras setup.py --extra ci --output-file sdk/python/requirements/py$(PYTHON)-ci-requirements.txt
+	uv pip compile --system --no-strip-extras setup.py --extra ci --output-file sdk/python/requirements/py$(PYTHON_VERSION)-ci-requirements.txt
 
 package-protos:
 	cp -r ${ROOT_DIR}/protos ${ROOT_DIR}/sdk/python/feast/protos
@@ -61,11 +62,11 @@ compile-protos-python:
 	python setup.py build_python_protos --inplace
 
 install-python:
-	python -m piptools sync sdk/python/requirements/py$(PYTHON)-requirements.txt
+	python -m piptools sync sdk/python/requirements/py$(PYTHON_VERSION)-requirements.txt
 	python setup.py develop
 
 lock-python-dependencies:
-	uv pip compile --system --no-strip-extras setup.py --output-file sdk/python/requirements/py$(PYTHON)-requirements.txt
+	uv pip compile --system --no-strip-extras setup.py --output-file sdk/python/requirements/py$(PYTHON_VERSION)-requirements.txt
 
 lock-python-dependencies-all:
 	pixi run --environment py39 --manifest-path infra/scripts/pixi/pixi.toml "uv pip compile --system --no-strip-extras setup.py --output-file sdk/python/requirements/py3.9-requirements.txt"

docs/project/development-guide.md

@@ -132,8 +132,7 @@ Setting up your development environment for Feast Python SDK / CLI:
   source venv/bin/activate
   ```
 4. (M1 Mac only): Follow the [dev guide](https://github.com/feast-dev/feast/issues/2105)
-5. Install uv
-It is recommended to use uv for managing python dependencies.
+5. Install uv. It is recommended to use uv for managing python dependencies.
 ```sh
 curl -LsSf https://astral.sh/uv/install.sh | sh
 ```
@@ -145,21 +144,26 @@ pip install uv
 ```
 make build-ui
 ```
-7. (Optional) install pixi
-pixi is necessary to run step 8 for all python versions at once.
+7. (Optional) install pixi. pixi is necessary to run step 8 for all python versions at once.
 ```sh
 curl -fsSL https://pixi.sh/install.sh | bash
 ```
-8. (Optional): Recompile python lock files
-If you make changes to requirements or simply want to update python lock files to reflect latest versioons.
+8. (Optional): Recompile python lock files. Only when you make changes to requirements or simply want to update python lock files to reflect latest versioons.
 ```sh
 make lock-python-dependencies-all
 ``` 
-9. Install development dependencies for Feast Python SDK / CLI
-This will install package versions from the lock file, install editable version of feast and compile protobufs.
+9. Install development dependencies for Feast Python SDK / CLI. This will install package versions from the lock file, install editable version of feast and compile protobufs.
+
+If running inside a virtual environment:
+```sh
+make install-python-ci-dependencies-uv-venv
+```
+
+Otherwise:
 ```sh
 make install-python-ci-dependencies-uv
 ```
+
 10. Spin up Docker Image
 ```sh
 docker build -t docker-whale -f ./sdk/python/feast/infra/feature_servers/multicloud/Dockerfile .