sage: matplotlib 3.6 upgrade fixes

pkgs/applications/science/math/sage/patches/sphinx-fix-matplotlib-css-perms.patch

@@ -1,21 +0,0 @@
-diff --git a/src/sage_docbuild/ext/multidocs.py b/src/sage_docbuild/ext/multidocs.py
-index f91c7753ca..edeb81ff2e 100644
---- a/src/sage_docbuild/ext/multidocs.py
-+++ b/src/sage_docbuild/ext/multidocs.py
-@@ -284,6 +284,16 @@ def init_subdoc(app):
-         if not app.config.multidoc_first_pass:
-             app.connect('env-updated', fetch_citation)
- 
-+            def fix_matplotlib_css_permissions(app: Sphinx, env):
-+                css_file = os.path.join(app.builder.outdir, '_static', 'plot_directive.css')
-+                try:
-+                    os.chmod(css_file, 0o644)
-+                except:
-+                    pass
-+
-+            # executed after matplotlib's _copy_css_file
-+            app.connect('build-finished', fix_matplotlib_css_permissions, priority=600)
-+
-         # Monkey patch copy_static_files to make a symlink to "../"
-         def link_static_files():
-             """

pkgs/applications/science/math/sage/sage-src.nix

@@ -80,10 +80,6 @@ stdenv.mkDerivation rec {
     # Parallelize docubuild using subprocesses, fixing an isolation issue. See
     # https://groups.google.com/forum/#!topic/sage-packaging/YGOm8tkADrE
     ./patches/sphinx-docbuild-subprocesses.patch
-
-    # Docbuilding copies files from the Nix store and expects them to be writable.
-    # Remove when https://github.com/matplotlib/matplotlib/pull/23805 lands.
-    ./patches/sphinx-fix-matplotlib-css-perms.patch
   ];
 
   # Since sage unfortunately does not release bugfix releases, packagers must
@@ -163,6 +159,22 @@ stdenv.mkDerivation rec {
     # conflicts. The patch below contains rebased versions.
     ./patches/pari-2.15.1-upgrade-rebased.patch
 
+    # https://trac.sagemath.org/ticket/34668
+    (fetchSageDiff {
+      name = "matplotlib-3.6-upgrade.patch";
+      base = "9.8.beta2";
+      rev = "5501e0de0dca1cff0355326dd42bd8c7e5749568";
+      sha256 = "sha256-ceJkVaecIsZewN8v/3gPQXFbFjv5Akz6zEFg/ToXdek=";
+    })
+
+    # https://trac.sagemath.org/ticket/34693
+    (fetchSageDiff {
+      name = "matplotlib-3.6-docbuilding.patch";
+      base = "9.8.beta4";
+      rev = "64589686c261d33e6b5aff2589bcae8af004bcc6";
+      sha256 = "sha256-j5AMY1TmhP+HBBBYaFZSkABJ5vtwe6iP2LRfGEgSm8Q=";
+    })
+
     # Sage uses mixed integer programs (MIPs) to find edge disjoint
     # spanning trees. For some reason, aarch64 glpk takes much longer
     # than x86_64 glpk to solve such MIPs. Since the MIP formulation