remove requirement_dev.txt from project

.readthedocs.yaml

@@ -8,12 +8,8 @@ build:
   os: ubuntu-24.04
   tools:
     python: "3.10"
+  commands:
+    - pip install --group docs
 
 sphinx:
   configuration: docs/conf.py
-
-python:
-  install:
-  - requirements: requirements_dev.txt
-  - method: pip
-    path: .

docs/contributing.rst

@@ -29,7 +29,7 @@ you'll have to deactivate it for this repository::
 Once you've obtained a checkout, you should create a virtualenv_ and install
 the libraries required for working on the Debug Toolbar::
 
-    $ python -m pip install -r requirements_dev.txt
+    $ python -m pip install --group dev
 
 .. _virtualenv: https://virtualenv.pypa.io/
 
@@ -267,7 +267,7 @@ activated and all dependencies are installed:
 
 .. code-block:: bash
 
-    pip install -r requirements_dev.txt
+    pip install --group dev
 
 Alternatively, you can build the documentation using Tox, which automatically
 handles dependencies and environment setup:

example/README.rst

@@ -16,7 +16,7 @@ How to
 The example project requires a working installation of Django and a few other
 packages::
 
-    $ python -m pip install -r requirements_dev.txt
+    $ python -m pip install --group dev
 
 The following command must run from the root directory of Django Debug Toolbar,
 i.e. the directory that contains ``example/``::

pyproject.toml

@@ -48,6 +48,41 @@ urls.Homepage = "https://github.com/django-commons/django-debug-toolbar"
 urls.Issues = "https://github.com/django-commons/django-debug-toolbar/issues"
 urls.Source = "https://github.com/django-commons/django-debug-toolbar"
 
+[dependency-groups]
+dev = [
+  { include-group = "django_async" },
+  { include-group = "docs" },
+  { include-group = "other" },
+  { include-group = "run_time" },
+  { include-group = "test" },
+]
+test = [
+  "black",
+  "coverage[toml]",
+  "django-csp",               # Used in tests/test_csp_rendering
+  "django-template-partials",
+  "html5lib",
+  "selenium",
+  "tox",
+]
+docs = [
+  "sphinx",
+  "sphinx-rtd-theme>1",
+  "sphinxcontrib-spelling",
+]
+run_time = [
+  "django",
+  "jinja2",
+  "sqlparse",
+]
+django_async = [
+  "daphne",     # Integration support
+  "whitenoise",
+]
+other = [
+  "pre-commit",
+]
+
 [tool.hatch.build.targets.wheel]
 packages = [
   "debug_toolbar",