Migrate from Poetry to uv (#51)

Poetry has been causing CI issues (pinned to 1.8.5 as a workaround).
Mirrors the approach already used in the infra repo for consistency.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: mattgodbolt

.github/workflows/ci.yml

@@ -8,10 +8,11 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v2
-        with:
-          python-version: '3.9'
       - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
       - name: pre-commit hooks
         run: env SKIP=test make pre-commit
       - name: tests

.gitignore

@@ -1,5 +1,6 @@
 *.pyc
 *.swp
 /.env
-/.poetry
+/.uv
+/.venv
 /.pytest_cache

.python-version

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

Makefile

@@ -1,34 +1,31 @@
-export POETRY_HOME=$(CURDIR)/.poetry
-# https://github.com/python-poetry/poetry/issues/1917
-export PYTHON_KEYRING_BACKEND=keyring.backends.null.Keyring
+UV_SYSTEM:=$(shell command -v uv 2>/dev/null)
+UV_BIN:=$(if $(UV_SYSTEM),$(UV_SYSTEM),$(CURDIR)/.uv/uv)
+UV_VENV:=$(CURDIR)/.venv
+UV_DEPS:=$(UV_VENV)/.deps
 
-POETRY:=$(POETRY_HOME)/bin/poetry
-POETRY_DEPS:=$(POETRY_HOME)/.deps
-SYS_PYTHON:=$(shell command -v python3 || command -v python || echo .no-python-found)
 default: test
 
 help: # with thanks to Ben Rady
 	@grep -E '^[0-9a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
 
-$(SYS_PYTHON):
-	@echo Could not find a system python
-	exit 1
+$(CURDIR)/.uv/uv:
+	@echo "Installing uv..."
+	@mkdir -p $(dir $@)
+	@curl -LsSf https://astral.sh/uv/install.sh | UV_NO_MODIFY_PATH=1 UV_INSTALL_DIR=$(CURDIR)/.uv sh -s
 
 .PHONY: deps
-deps: $(POETRY) $(POETRY_DEPS)
-$(POETRY): $(SYS_PYTHON)
-	curl -sSL https://install.python-poetry.org | $(SYS_PYTHON) - --version 1.8.5
-$(POETRY_DEPS): $(POETRY) pyproject.toml poetry.lock
-	$(POETRY) install
+deps: $(UV_BIN) $(UV_DEPS)
+$(UV_DEPS): $(UV_BIN) pyproject.toml
+	$(UV_BIN) sync --no-install-project
 	@touch $@
 
 .PHONY: pre-commit
 pre-commit: deps  ## Runs all pre-commit hooks
-	$(POETRY) run pre-commit run --all-files
+	$(UV_BIN) run pre-commit run --all-files
 
 .PHONY: install-pre-commit
 install-pre-commit: deps  ## Install pre-commit hooks
-	$(POETRY) run pre-commit install
+	$(UV_BIN) run pre-commit install
 
 .PHONY: test
 test: deps  ## Runs tests
@@ -37,4 +34,4 @@ test: deps  ## Runs tests
 
 .PHONY: build-yamls
 build-yamls: deps  ## Builds all the yaml build files
-	$(POETRY) run python make_builds.py
+	$(UV_BIN) run python make_builds.py