Trac #31278: widgetsnbextension should not depend on notebook

This dependency pulls in a full installation of the Jupyter notebook.
{{{
notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets==7.5.1
}}}
This is an obstacle to avoiding to build a copy of the jupyter notebook
(connecting to a system jupyter notebook).

The dependency is being removed in the widgetsnbextension 4.x series
(currently alpha). We backport it to the stable release.

URL: https://trac.sagemath.org/31278
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Dima Pasechnik

build/pkgs/widgetsnbextension/dependencies

@@ -1,4 +1,4 @@
-$(PYTHON) | $(PYTHON_TOOLCHAIN) notebook jupyter_core
+$(PYTHON) | $(PYTHON_TOOLCHAIN) jupyter_core
 
 ----------
 All lines of this file are ignored except the first.

build/pkgs/widgetsnbextension/package-version.txt

@@ -1 +1 @@
-3.5.1
+3.5.1.p0

build/pkgs/widgetsnbextension/patches/no-notebook-dep.patch

@@ -0,0 +1,24 @@
+commit 55bc3c93bf4310d4f4d9d02f2e51d1d65b7f6533 (HEAD -> 7.6.3-sage)
+Author: Sylvain Corlay <[email protected]>
+Date:   Mon Oct 21 01:33:23 2019 +0200
+
+    Drop notebook dependency from widgetsnbextension
+
+diff --git a/widgetsnbextension/setup.py b/widgetsnbextension/setup.py
+index 866d82eb..88746f95 100644
+--- a/setup.py
++++ b/setup.py
+@@ -219,13 +219,5 @@ if 'setuptools' in sys.modules:
+     from setuptools.command.develop import develop
+     setup_args['cmdclass']['develop'] = js_prerelease(develop, strict=True)
+
+-setuptools_args = {}
+-install_requires = setuptools_args['install_requires'] = [
+-    'notebook>=4.4.1',
+-]
+-
+-if 'setuptools' in sys.modules:
+-    setup_args.update(setuptools_args)
+-
+ if __name__ == '__main__':
+     setup(**setup_args)