feat(constants): auto-source SUPPORTED_SERVER_VERSION from pyproject.toml

Move the version constraint to [tool.opendecree] in pyproject.toml as the
single source of truth. build/gen-constants.py reads it and writes
sdk/src/opendecree/_constants.py; make generate now runs gen-constants
first. __init__.py imports SUPPORTED_SERVER_VERSION from _constants.py
instead of hardcoding it.

Also fix the build/ .gitignore rule — it was too broad, silently requiring
force-add for Dockerfile.tools. Negation patterns now let tracked scripts
(*.py, Dockerfile.tools) be added normally.

Closes #64

Co-Authored-By: Claude <noreply@anthropic.com>

Author: zeevdr

.gitignore

@@ -6,6 +6,8 @@ __pycache__/
 *.egg
 dist/
 build/
+!build/Dockerfile.tools
+!build/*.py
 *.whl
 
 # Virtual environments

Makefile

@@ -6,7 +6,7 @@ DOCKER_RUN_ROOT := docker run --rm -v $(CURDIR):/workspace -v $(CURDIR)/../decre
 PROTO_DIR := /proto
 GEN_DIR   := sdk/src/opendecree/_generated
 
-.PHONY: all generate lint format typecheck test integration build clean tools docs pre-commit help
+.PHONY: all generate gen-constants lint format typecheck test integration build clean tools docs pre-commit help
 
 all: generate lint typecheck test
 
@@ -19,8 +19,12 @@ $(TOOLS_SENTINEL): build/Dockerfile.tools
 	docker build -t $(TOOLS_IMAGE) -f build/Dockerfile.tools build/
 	@touch $(TOOLS_SENTINEL)
 
-## generate: Generate Python proto stubs from proto definitions
-generate: $(TOOLS_SENTINEL)
+## gen-constants: Generate _constants.py from pyproject.toml [tool.opendecree]
+gen-constants:
+	python3 build/gen-constants.py
+
+## generate: Generate Python proto stubs and package constants
+generate: $(TOOLS_SENTINEL) gen-constants
 	$(DOCKER_RUN) sh -c '\
 		SITE=$$(python -c "import site; print(site.getsitepackages()[0])") && \
 		GRPC_PROTO=$$(python -c "import grpc_tools; import os; print(os.path.join(os.path.dirname(grpc_tools.__file__), \"_proto\"))") && \

build/gen-constants.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+"""Generate sdk/src/opendecree/_constants.py from pyproject.toml [tool.opendecree]."""
+
+import tomllib
+from pathlib import Path
+
+ROOT = Path(__file__).parent.parent
+PYPROJECT = ROOT / "sdk" / "pyproject.toml"
+OUT = ROOT / "sdk" / "src" / "opendecree" / "_constants.py"
+
+with PYPROJECT.open("rb") as f:
+    config = tomllib.load(f)
+
+supported = config["tool"]["opendecree"]["supported_server_version"]
+
+OUT.write_text(
+    "# Generated by build/gen-constants.py — do not edit manually.\n"
+    f'SUPPORTED_SERVER_VERSION = "{supported}"\n'
+)
+print(f"Written {OUT.relative_to(ROOT)}")

sdk/pyproject.toml

@@ -93,3 +93,6 @@ omit = ["src/opendecree/_generated/*"]
 
 [tool.coverage.report]
 fail_under = 95
+
+[tool.opendecree]
+supported_server_version = ">=0.3.0,<1.0.0"

sdk/src/opendecree/__init__.py

@@ -4,7 +4,8 @@
 
 __version__ = _pkg_version("opendecree")
 
-SUPPORTED_SERVER_VERSION = ">=0.3.0,<1.0.0"
+from opendecree._constants import SUPPORTED_SERVER_VERSION
+
 PROTO_VERSION = "v1"
 
 from opendecree._convert import URL

sdk/src/opendecree/_constants.py

@@ -0,0 +1,2 @@
+# Generated by build/gen-constants.py — do not edit manually.
+SUPPORTED_SERVER_VERSION = ">=0.3.0,<1.0.0"