Remove Packaging Dependency

jupyterlab_server/_version.py

@@ -1,3 +1,15 @@
-from jupyter_packaging import get_version_info
+"""
+store the current version info of the server.
+
+"""
+import re
+
 __version__ = '2.5.0'
-version_info = get_version_info(__version__)
+
+# Build up version_info tuple for backwards compatibility
+pattern = r'(?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)(?P<rest>.*)'
+match = re.match(pattern, __version__)
+parts = [int(match[part]) for part in ['major', 'minor', 'patch']]
+if match['rest']:
+  parts.append(match['rest'])
+version_info = tuple(parts)

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["jupyter_packaging~=0.9", "jupyter_server"]
+requires = ["jupyter_packaging~=0.9,<2", "jupyter_server"]
 build-backend = "setuptools.build_meta"
 
 [tool.check-manifest]

setup.cfg

@@ -31,14 +31,13 @@ install_requires =
     jinja2>=2.10
     json5
     jsonschema>=3.0.1
-    jupyter_packaging~=0.9,<2
     packaging
     requests
     jupyter_server~=1.4
 
 
 [options.extras_require]
-test = codecov; ipykernel; pytest>=5.3.2; pytest-cov; jupyter_server[test]; openapi_core; pytest-console-scripts; strict-rfc3339; ruamel.yaml; wheel
+test = codecov; ipykernel; pytest>=5.3.2; pytest-cov; jupyter_server[test]; openapi_core~=0.13.8; pytest-console-scripts; strict-rfc3339; ruamel.yaml; wheel
 
 [options.packages.find]
 exclude = ['docs*']