Convert from pipenv to uv (#335)

[uv][1] is a better, faster version of pipenv for managing python
projects.

The expectation here is similar to `pipenv`, in that developers will
install `uv` locally; I haven't pinned a particular version as we aren't
doing anything complicated (yet). Can pin a version later if necessary.

The only thing left that we may want to do here is to use `uv` as our
[build backend](https://docs.astral.sh/uv/concepts/build-backend/),
which would eliminate our use of `hatch`, but uv doesn't have [dynamic
version resolution from
vcs](astral-sh/uv#14137) right now (which is
how we currently do our releases), so holding off on that for the time
being.

[1]: https://docs.astral.sh/uv/

Author: stefanvanburen

.env

@@ -4,7 +4,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-  - package-ecosystem: "pip"
+  - package-ecosystem: "uv"
     directory: "/"
     schedule:
       interval: "weekly"

.github/dependabot.yml

@@ -27,18 +27,15 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: stable
-      - name: Install Python ${{ matrix.python-version }}
-        id: python
-        uses: actions/setup-python@v5
+          cache: false
+      - uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
-          cache: "pipenv"
-      - run: ${{steps.python.outputs.python-path}}  -m pip install --upgrade pip pipenv
       - name: Execute tests
-        run: make test PYTHON=${{ steps.python.outputs.python-path }}
+        run: make test
       - name: Lint
-        run: make lint PYTHON=${{ steps.python.outputs.python-path }}
+        run: make lint
       - name: Format
-        run: make format PYTHON=${{ steps.python.outputs.python-path }}
+        run: make format
       - name: Check generated
-        run: make checkgenerate PYTHON=${{ steps.python.outputs.python-path }}
+        run: make checkgenerate

.github/workflows/ci.yaml

@@ -27,12 +27,9 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: stable
+          cache: false
+      - uses: astral-sh/setup-uv@v6
       - name: Install Python ${{ matrix.python-version }}
-        id: python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          cache: "pipenv"
-      - run: ${{steps.python.outputs.python-path}}  -m pip install --upgrade pip pipenv
+        run: uv python install ${{ matrix.python-version }}
       - name: Test conformance
-        run: make conformance PYTHON=${{ steps.python.outputs.python-path }}
+        run: make conformance

.github/workflows/conformance.yaml

@@ -19,20 +19,18 @@ jobs:
         run: |
           VERSION=${{github.head_ref}}
           echo "VERSION=${VERSION##*/}" >> $GITHUB_ENV
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.13"
-      - name: Install pypa/build
+      - uses: astral-sh/setup-uv@v6
+      - name: Build release
         run: |
-          python -m pip install build
-          python -m build
+          uv build
       - uses: actions/upload-artifact@v4
         with:
           name: package
           path: dist/
 
   publish:
+    # TODO: trusted publisher
+    # https://docs.astral.sh/uv/guides/publish/#publishing-your-package
     name: Publish on PyPI
     runs-on: ubuntu-latest
     environment:

.github/workflows/release.yaml

@@ -9,8 +9,7 @@ MAKEFLAGS += --no-print-directory
 BIN := .tmp/bin
 export PATH := $(BIN):$(PATH)
 export GOBIN := $(abspath $(BIN))
-# Set to use a different Python interpreter. For example, `PYTHON=python make test`.
-PYTHON ?= python3
+export PYTHONPATH ?= gen
 CONFORMANCE_ARGS ?= --strict_message --expected_failures=tests/conformance/nonconforming.yaml --timeout 10s
 ADD_LICENSE_HEADER := $(BIN)/license-header \
 		--license-type apache \
@@ -47,27 +46,27 @@ generate: $(BIN)/buf $(BIN)/license-header ## Regenerate code and license header
 .PHONY: format
 format: install $(BIN)/license-header ## Format code
 	$(ADD_LICENSE_HEADER)
-	pipenv run ruff format protovalidate tests
-	pipenv run ruff check --fix protovalidate tests
+	uv run -- ruff format protovalidate tests
+	uv run -- ruff check --fix protovalidate tests
 
 .PHONY: test
 test: generate install gettestdata ## Run unit tests
-	pipenv run pytest
+	uv run -- pytest
 
 .PHONY: conformance
 conformance: $(BIN)/protovalidate-conformance generate install ## Run conformance tests
-	protovalidate-conformance $(CONFORMANCE_ARGS) pipenv -- --python $(PYTHON) run python3 -m tests.conformance.runner
+	protovalidate-conformance $(CONFORMANCE_ARGS) uv -- run python3 -m tests.conformance.runner
 
 .PHONY: lint
 lint: install ## Lint code
-	pipenv run ruff format --check --diff protovalidate tests
-	pipenv run mypy protovalidate
-	pipenv run ruff check protovalidate tests
-	pipenv verify
+	uv run -- ruff format --check --diff protovalidate tests
+	uv run -- mypy protovalidate
+	uv run -- ruff check protovalidate tests
+	uv sync --locked
 
 .PHONY: install
 install: ## Install dependencies
-	pipenv --python $(PYTHON) sync --dev
+	uv sync --dev
 
 .PHONY: checkgenerate
 checkgenerate: generate