dev-python/nbformat: Fix installing package data

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/nbformat/files/nbformat-5.1.2-package-data.patch

@@ -0,0 +1,50 @@
+From 6dc17e79be58c3cce66256eec2a565692cf95809 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org>
+Date: Fri, 22 Jan 2021 10:16:24 +0100
+Subject: [PATCH] Fix installing package_data when --build-base is set
+
+Fix package_data declarations in setup.py to associate every set
+of files with its bottommost package.  This is necessary for the 'build'
+command to install files correctly when --build-base is passed
+explicitly.  The all-files-for-top-package approach seems to work only
+incidentally.
+
+To reproduce the problem, try:
+
+    setup.py build --build-base=build2
+
+and note that none of the data files were installed.
+---
+ setup.py | 16 +++++++++++-----
+ 1 file changed, 11 insertions(+), 5 deletions(-)
+
+diff --git a/setup.py b/setup.py
+index 22305d3..0a6aa45 100644
+--- a/setup.py
++++ b/setup.py
+@@ -34,11 +34,17 @@ for d, _, _ in os.walk(pjoin(here, name)):
+         packages.append(d[len(here)+1:].replace(os.path.sep, '.'))
+ 
+ package_data = {
+-    'nbformat' : [
+-        'corpus/*.txt'
+-        'tests/*.ipynb',
+-        'v3/nbformat.v3*.schema.json',
+-        'v4/nbformat.v4*.schema.json',
++    'nbformat.corpus' : [
++        '*.txt',
++    ],
++    'nbformat.tests' : [
++        '*.ipynb',
++    ],
++    'nbformat.v3' : [
++        'nbformat.v3*.schema.json',
++    ],
++    'nbformat.v4' : [
++        'nbformat.v4*.schema.json',
+     ],
+ }
+ 
+-- 
+2.30.0
+

dev-python/nbformat/nbformat-5.1.2-r1.ebuild

@@ -26,13 +26,17 @@ RDEPEND="
 	>=dev-python/traitlets-4.1[${PYTHON_USEDEP}]
 	dev-python/jupyter_core[${PYTHON_USEDEP}]
 	"
-DEPEND="
+BDEPEND="
 	test? (
 		dev-python/fastjsonschema[${PYTHON_USEDEP}]
 		dev-python/testpath[${PYTHON_USEDEP}]
 	)
 	"
 
+PATCHES=(
+	"${FILESDIR}"/nbformat-5.1.2-package-data.patch
+)
+
 distutils_enable_sphinx docs \
 	dev-python/numpydoc
 distutils_enable_tests pytest