Switch to hatch build backend

.gitignore

@@ -38,6 +38,6 @@ docs/source/config_options.rst
 .vscode
 
 # Downloaded theme files
-jupyter-data/share/jupyter/nbconvert/templates/lab/static/index.css
-jupyter-data/share/jupyter/nbconvert/templates/lab/static/theme-dark.css
-jupyter-data/share/jupyter/nbconvert/templates/lab/static/theme-light.css
+share/templates/lab/static/index.css
+share/templates/lab/static/theme-dark.css
+share/templates/lab/static/theme-light.css

buildapi.py → hatch_build.py

@@ -1,23 +1,9 @@
-"""A build backend that handles installing the template files.
-
-See https://peps.python.org/pep-0517/#in-tree-build-backends
-"""
+"""Custom build script for hatch backend"""
 import os
 import sys
 from urllib.request import urlopen
 
-from flit_core.buildapi import build_editable  # noqa
-from flit_core.buildapi import build_sdist  # noqa
-from flit_core.buildapi import build_wheel  # noqa
-from flit_core.buildapi import (
-    get_requires_for_build_editable as get_requires_for_build_editable_orig,
-)
-from flit_core.buildapi import (
-    get_requires_for_build_sdist as get_requires_for_build_sdist_orig,
-)
-from flit_core.buildapi import (
-    get_requires_for_build_wheel as get_requires_for_build_wheel_orig,
-)
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
 
 notebook_css_version = "5.4.0"
 notebook_css_url = "https://cdn.jupyter.org/notebook/%s/style/style.min.css" % notebook_css_version
@@ -50,7 +36,7 @@
 
 osp = os.path
 here = osp.abspath(osp.dirname(__file__))
-templates_dir = osp.join(here, "jupyter-data", "share", "jupyter", "nbconvert", "templates")
+templates_dir = osp.join(here, "share", "templates")
 
 
 def _get_css_file(template_name, url, filename):
@@ -88,16 +74,8 @@ def _get_css_files():
             _get_css_file(template_name, url, filename)
 
 
-def get_requires_for_build_wheel(config_settings=None):
-    _get_css_files()
-    return get_requires_for_build_wheel_orig(config_settings=config_settings)
-
-
-def get_requires_for_build_sdist(config_settings=None):
-    _get_css_files()
-    return get_requires_for_build_sdist_orig(config_settings=config_settings)
-
-
-def get_requires_for_build_editable(config_settings=None):
-    _get_css_files()
-    return get_requires_for_build_editable_orig(config_settings=config_settings)
+class CustomHook(BuildHookInterface):
+    def initialize(self, version, build_data):
+        if self.target_name not in ["wheel", "sdist"]:
+            return
+        _get_css_files()

nbconvert/_version.py

@@ -1,3 +1,4 @@
+__version__ = "7.0.0rc0"
 version_info = (7, 0, 0)
 pre_info = "rc0"
 dev_info = ""
@@ -64,4 +65,4 @@ def is_canonical(version):
         raise ValueError(pep440_err)
 
 
-__version__ = create_valid_version(version_info, pre_input=pre_info, dev_input=dev_info)
+assert __version__ == create_valid_version(version_info, pre_input=pre_info, dev_input=dev_info)

pyproject.toml

@@ -1,7 +1,6 @@
 [build-system]
-requires = ["flit_core >=3.2,<4"]
-build-backend = "buildapi"
-backend-path = ["."]
+requires = ["hatchling >=0.25"]
+build-backend = "hatchling.build"
 
 [project]
 name = "nbconvert"
@@ -91,11 +90,17 @@ all = [
 jupyter-nbconvert = "nbconvert.nbconvertapp:main"
 jupyter-dejavu = "nbconvert.nbconvertapp:dejavu_main"
 
-[tool.flit.sdist]
-include = ["buildapi.py", "jupyter-data"]
+[tool.hatch.version]
+path = "nbconvert/_version.py"
 
-[tool.flit.external-data]
-directory = "jupyter-data"
+# Used to call hatch_build.py
+[tool.hatch.build.hooks.custom]
+
+[tool.hatch.build.targets.sdist]
+artifacts = ["share/templates/lab/static/*.*"]
+
+[tool.hatch.build.targets.wheel.shared-data]
+"share/templates" = "share/jupyter/nbconvert/templates"
 
 [tool.pytest.ini_options]
 markers = "network: marks tests which require network connection"