chore: switch dependency management from pip-tools to uv

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: salman2013

.github/workflows/python-tests.yml

@@ -29,6 +29,9 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v6
 
+      - name: Install CI dependencies
+        run: uv sync --group ci
+
       - name: Run tests with Tox (${{ matrix.toxenv }})
         env:
           TOXENV: ${{ matrix.toxenv }}

.github/workflows/release.yml

@@ -25,6 +25,9 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v6
 
+      - name: Install CI dependencies
+        run: uv sync --group ci
+
       - name: Run tests (${{ matrix.toxenv }})
         env:
           TOXENV: ${{ matrix.toxenv }}

Makefile

@@ -14,7 +14,7 @@ help:
 	@perl -nle'print $& if m{^[\.a-zA-Z_-]+:.*?## .*$$}' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m  %-25s\033[0m %s\n", $$1, $$2}'
 
 upgrade: ## update uv.lock and regenerate uv constraints from edx-lint
-	edx_lint write_uv_constraints
+	uv run --with edx-lint edx_lint write_uv_constraints pyproject.toml
 	uv lock --upgrade
 
 requirements: ## install development environment requirements using uv

pyproject.toml

@@ -16,7 +16,6 @@ keywords = ["Python", "edx"]
 classifiers = [
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
     "Natural Language :: English",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.12",
@@ -87,27 +86,36 @@ test-base = [
     "pytest-django",
     "six",
 ]
-test = [{ include-group = "test-base" }]
+# Current default Django version. When adding or retiring a Django version
+# from the matrix, update this group and [tool.uv].conflicts accordingly.
+test = [
+    { include-group = "test-base" },
+    "Django>=5.2,<6.0",
+]
+django42 = [
+    { include-group = "test-base" },
+    "Django>=4.2,<5.0",
+]
 quality = [
+    { include-group = "test" },
     "edx-lint",
     "isort",
     "pycodestyle",
     "pydocstyle",
     "pylint",
 ]
 doc = [
-    { include-group = "test-base" },
+    { include-group = "test" },
     "doc8",
     "Sphinx",
     "sphinx-book-theme",
 ]
 ci = [
-    { include-group = "test" },
-    { include-group = "quality" },
     "tox",
     "tox-uv",
 ]
 dev = [
+    { include-group = "quality" },
     { include-group = "ci" },
     { include-group = "doc" },
 ]
@@ -158,6 +166,12 @@ ignore = ["D001"]
 
 [tool.uv]
 package = true
+# Each entry lists groups with mutually exclusive version requirements so uv
+# can produce a single uv.lock with a separate resolution for each.
+# Add a new pair whenever you add a legacy-version group to [dependency-groups].
+conflicts = [
+    [{ group = "test" }, { group = "django42" }],
+]
 #  DO NOT EDIT constraint-dependencies DIRECTLY.
 #  This list is managed by `edx_lint write_uv_constraints`
 #  and will be overwritten the next time `make upgrade` is run.

tox.ini

@@ -11,17 +11,13 @@ max-line-length = 120
 match-dir = (?!migrations)
 
 [testenv]
-# uv-venv-runner (not lock-runner) is used here so that factor-conditional
-# Django version deps can be applied per environment without conflicting in
-# the shared uv.lock.
-runner = uv-venv-runner
+runner = uv-venv-lock-runner
 setenv =
     PYTHONPATH = {toxinidir}
     DJANGO_SETTINGS_MODULE = test_settings
-dependency_groups = test
-deps =
-    django42: Django>=4.2,<5.0
-    django52: Django>=5.2,<6.0
+dependency_groups =
+    django42: django42
+    django52: test
 allowlist_externals =
     mkdir
 commands =