Replace pants with uv and simplify development workflow

.github/workflows/ci.yml

@@ -1,115 +1,57 @@
 name: CI
 
 on:
-    push:
-        branches:
-          - develop
     pull_request:
         branches:
           - develop
 
+env:
+  UV_SYSTEM_PYTHON: true
+
 jobs:
-  test:
+  ci:
     runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.12"]
-
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
 
-      - name: Set up Python for CI - ${{ matrix.python-version }}
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Initialize Pants
-        uses: pantsbuild/actions/init-pants@main
-        with:
-          # cache0 makes it easy to bust the cache if needed
-          # just increase the integer to start with a fresh cache
-          gha-cache-key: cache0-py${{ matrix.python_version }}
-          named-caches-hash: ${{ hashFiles('python-default.lock') }}
-          pants-ci-config: pants.ci.toml
-
-      - name: Run tests
-        run: |
-          make test-py
-
-      - name: Upload coverage
-        if: matrix.python-version == 3.12
-        uses: codecov/codecov-action@v3
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          file: ./dist/coverage/python/coverage.xml
-          flags: unittests
-          name: codecov-umbrella
-          fail_ci_if_error: true
-
-
-  test-codegen:
-    runs-on: ubuntu-latest
 
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.12"]
-
-    name: Codegen Java 17 / Python ${{ matrix.python-version }}
-
-    steps:
-      - name: Checkout Repository
-        uses: actions/checkout@v4
-
-      - name: Download Corretto 17 JDK
-        run: |
-          download_url="https://corretto.aws/downloads/latest/amazon-corretto-17-x64-linux-jdk.tar.gz"
-          wget -O $RUNNER_TEMP/java_package.tar.gz $download_url
-
-      - name: Set up Corretto 17 JDK
+      - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
-          distribution: 'jdkfile'
-          jdkFile: ${{ runner.temp }}/java_package.tar.gz
           java-version: 17
-          architecture: x64
+          distribution: 'corretto'
 
-      - name: clean and build without python
-        run: cd codegen && ./gradlew clean build
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
 
-      - name: Set Up Python for CI - ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Initialize Pants
-        uses: pantsbuild/actions/init-pants@main
-        with:
-          # cache0 makes it easy to bust the cache if needed
-          gha-cache-key: cache0-py${{ matrix.python_version }}
-          named-caches-hash: ${{ hashFiles('python-default.lock') }}
-          pants-ci-config: pants.ci.toml
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
 
-      - name: Install smithy-python
+      - name: Setup workspace
         run: |
-          make install-python-components
+          export UV_PROJECT_ENVIRONMENT="${pythonLocation}"
+          echo "UV_PROJECT_ENVIRONMENT=$UV_PROJECT_ENVIRONMENT" >> "$GITHUB_ENV"
+          make install
 
-      - name: clean and build without formatting/linting installed
-        run: cd codegen && ./gradlew clean build
+      - name: Check python packages
+        run: |
+          make check-py
 
-      - name: Install black
+      - name: Test python packages
         run: |
-          python${{ matrix.python-version }} -m pip install --upgrade black
+          make test-py
 
-      - name: clean and build without linting installed
-        run: cd codegen && ./gradlew clean build
+      - name: Build python packages
+        run: |
+          make build-py
 
-      - name: Install mypy and other libraries necessary for typing
+      - name: Build (and test) java packages
         run: |
-          python${{ matrix.python-version }} -m pip install --upgrade mypy pytest pytest-asyncio
+          make build-java
 
-      - name: clean and build with all optional tools installed
-        run: cd codegen && ./gradlew clean build
+      - name: Run protocol tests
+        run: |
+          make test-protocols

.gitignore

@@ -33,10 +33,4 @@ coverage.xml
 htmlcov
 *.egg-info
 dist
-
-# Pants workspace files
-/.pants.d/
-/dist/
-/.pids
-/.pants.workdir.file_lock*
-pants
+.venv

.python-version

@@ -0,0 +1 @@
+3.12

CONTRIBUTING.md

@@ -31,8 +31,8 @@ To send us a pull request, please:
 
 1. Fork the repository.
 2. Modify the source; please focus on the specific change you are contributing. If you also reformat all the code, it will be hard for us to focus on your change.
-3. Ensure local tests pass.
-4. Run `./pants fmt ::`, `./pants lint ::`, and `./pants check ::` if you've changed any python source.
+3. Ensure local tests pass (`make test-py` and `make test-protocols`).
+4. Run `make lint-py` if you've changed any python sources.
 4. Commit to your fork using clear commit messages.
 5. Send us a pull request, answering any default questions in the pull request interface.
 6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation.

Makefile

@@ -3,73 +3,44 @@
 help: ## Show this help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n\nTargets:\n"} /^[a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-25s\033[0m %s\n", $$1, $$2 }' $(MAKEFILE_LIST)
 
-pants: ## Installs pants launcher binary using the get-pants script. If $CI is true, assume it's installed already (through GHA), so just copy the wrapper script.
-ifeq ($(CI),true)
-	cp scripts/pantsw pants
-else
-	./get-pants --bin-dir .
-endif
 
+install: ## Sets up workspace (* you should run this first! *)
+	uv sync --all-packages --all-extras
+	cd codegen && ./gradlew
+	@printf "\n\nWorkspace initialized, please run:\n\033[36msource .venv/bin/activate\033[0m"
 
-install-python-components: pants ## Packages and installs the python packages.
-	./pants package ::
-	python3 -m pip install dist/*.whl --force-reinstall
 
-
-install-java-components: ## Publishes java packages to maven local.
-	cd codegen && ./gradlew publishToMavenLocal
-
-
-install-components: install-python-components install-java-components ## Installs java and python components locally.
-
-
-smithy-build: ## Builds the Java code generation packages.
+build-java: ## Builds the Java code generation packages.
 	cd codegen && ./gradlew clean build
 
 
-generate-protocol-tests: ## Generates the protocol tests, rebuilding necessary Java packages.
+test-protocols: ## Generates and runs the restJson1 protocol tests.
 	cd codegen && ./gradlew :protocol-test:build
+	uv run pytest codegen/protocol-test/build/smithyprojections/protocol-test/rest-json-1/python-client-codegen
 
 
-run-protocol-tests: ## Runs already-generated protocol tests.
-	cd codegen/protocol-test/build/smithyprojections/protocol-test/rest-json-1/python-client-codegen && \
-	python3 -m pip install '.[tests]' && \
-	python3 -m pytest tests
-
-
-test-protocols: install-python-components generate-protocol-tests run-protocol-tests ## Generates and runs protocol tests.
-
-
-lint-py: pants ## Runs formatters/fixers/linters for the python packages.
-	./pants fix lint python-packages/smithy-core::
-	./pants fix lint python-packages/smithy-http::
-	./pants fix lint python-packages/smithy-aws-core::
-	./pants fix lint python-packages/smithy-json::
-	./pants fix lint python-packages/smithy-event-stream::
-	./pants fix lint python-packages/aws-event-stream::
+lint-py: ## Runs linters and formatters on the python packages.
+	uv run docformatter packages --in-place || true
+	uv run ruff check packages --fix
+	uv run ruff format packages
 
 
-check-py: pants ## Runs checkers for the python packages.
-	./pants check python-packages/smithy-core::
-	./pants check python-packages/smithy-http::
-	./pants check python-packages/smithy-aws-core::
-	./pants check python-packages/smithy-json::
-	./pants check python-packages/smithy-event-stream::
-	./pants check python-packages/aws-event-stream::
+check-py: ## Runs checks (formatting, lints, type-checking) on the python packages.
+	uv run docformatter packages
+	uv run ruff check packages
+	uv run ruff format --check
+	uv run pyright packages
 
 
-test-py: pants ## Runs tests for the python packages.
-	./pants test python-packages/smithy-core::
-	./pants test python-packages/smithy-http::
-	./pants test python-packages/smithy-aws-core::
-	./pants test python-packages/smithy-json::
-	./pants test python-packages/smithy-event-stream::
-	./pants test python-packages/aws-event-stream::
+test-py: ## Runs tests for the python packages.
+	uv run pytest packages
 
 
-build-py: lint-py check-py test-py ## Runs formatters/fixers/linters/checkers/tests for the python packages.
+build-py: ## Builds the python packages.
+	uv build --all-packages 
 
 
-clean: ## Clean up generated code and artifacts.
-	rm -rf dist/
+clean: ## Clean up workspace, generated code, and other artifacts.
+	uv run virtualenv --clear .venv
+	rm -r dist .pytest_cache .ruff_cache || true
 	cd codegen && ./gradlew clean