Switch to hatch backend

setup.cfg → .flake8

@@ -1,11 +1,3 @@
-
-[bdist_wheel]
-universal=0
-
-[metadata]
-license_file = COPYING.md
-version = attr: ipykernel._version.__version__
-
 [flake8]
 ignore = E501, W503, E402
 builtins = c, get_config

hatch_build.py

@@ -0,0 +1,25 @@
+import os
+import shutil
+import sys
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+
+class CustomHook(BuildHookInterface):
+    def initialize(self, version, build_data):
+        here = os.path.abspath(os.path.dirname(__file__))
+        sys.path.insert(0, here)
+        from ipykernel.kernelspec import make_ipkernel_cmd, write_kernel_spec
+
+        # When building a standard wheel, the executable specified in the kernelspec is simply 'python'.
+        if version == "standard":
+            argv = make_ipkernel_cmd(executable="python")
+
+        # When installing an editable wheel, the full `sys.executable` can be used.
+        else:
+            argv = make_ipkernel_cmd()
+
+        dest = os.path.join(here, "data_kernelspec")
+        if os.path.exists(dest):
+            shutil.rmtree(dest)
+        write_kernel_spec(dest, overrides={"argv": argv})

ipykernel/kernelspec.py

@@ -13,7 +13,10 @@
 
 from jupyter_client.kernelspec import KernelSpecManager
 
-from .debugger import _is_debugpy_available
+try:
+    from .debugger import _is_debugpy_available
+except ImportError:
+    _is_debugpy_available = False
 
 pjoin = os.path.join
 

pyproject.toml

@@ -1,16 +1,60 @@
 [build-system]
-build-backend = "setuptools.build_meta"
-requires=[
-  "setuptools",
-  "wheel",
-  "debugpy",
-  "ipython>=5",
-  "jupyter_core>=4.2",
-  "jupyter_client",
+requires = ["hatchling>=0.25", "jupyter_client>=6"]
+build-backend = "hatchling.build"
+
+[project]
+name = "ipykernel"
+version = "6.13.0"
+authors = [{name = "IPython Development Team", email = "ipython-dev@scipy.org"}]
+license = {file = "COPYING.md"}
+readme = "README.md"
+description = "IPython Kernel for Jupyter"
+keywords = ["Interactive", "Interpreter", "Shell", "Web"]
+classifiers = [
+    "Intended Audience :: Developers",
+    "Intended Audience :: System Administrators",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: BSD License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+]
+urls = {Homepage = "https://ipython.org"}
+requires-python = ">=3.7"
+dependencies = [
+    "debugpy>=1.0",
+    "ipython>=7.23.1",
+    "traitlets>=5.1.0",
+    "jupyter_client>=6.1.12",
+    "tornado>=6.1",
+    "matplotlib-inline>=0.1",
+    'appnope;platform_system=="Darwin"',
+    "psutil",
+    "nest_asyncio",
+    "packaging",
+]
+
+[project.optional-dependencies]
+test = [
+    "pytest>=6.0",
+    "pytest-cov",
+    "flaky",
+    "ipyparallel",
+    "pre-commit",
+    "pytest-timeout",
 ]
 
-[tool.check-manifest]
-ignore = []
+# Used to call hatch_build.py
+[tool.hatch.build.hooks.custom]
+
+[tool.hatch.build.targets.wheel.shared-data]
+"data_kernelspec" = "share/jupyter/kernels/python3"
+
+[tool.hatch.build]
+artifacts = ["ipykernel_launcher.py"]
 
 [tool.jupyter-releaser]
 skip = ["check-links"]
@@ -29,6 +73,9 @@ tag_template = "v{new_version}"
 [[tool.tbump.file]]
 src = "ipykernel/_version.py"
 
+[[tool.tbump.file]]
+src = "pyproject.toml"
+
 [tool.mypy]
 check_untyped_defs = true
 disallow_any_generics = true