Backport PR #20748: Ensure _static directory exists before copying CSS.

QuLogic · meeseeksmachine · commit c7e85074aa38 · 2021-07-27T23:15:36.000Z
diff --git a/lib/matplotlib/sphinxext/plot_directive.py b/lib/matplotlib/sphinxext/plot_directive.py
@@ -258,6 +258,7 @@ def _copy_css_file(app, exc):
     if exc is None and app.builder.format == 'html':
         src = cbook._get_data_path('plot_directive/plot_directive.css')
         dst = app.outdir / Path('_static')
+        dst.mkdir(exist_ok=True)
         shutil.copy(src, dst)
 
 
