switch to packaged sphinx theme

docs/conf.py

@@ -19,7 +19,6 @@ import pkg_resources
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.append(os.path.join(os.path.dirname(__file__), '_themes'))
 sys.path.append(os.path.dirname(__file__))
 
 # -- General configuration -----------------------------------------------------
@@ -110,7 +109,7 @@ exclude_patterns = ['_build']
 # html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ['_themes']
+# html_theme_path = ['_themes']
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
@@ -263,19 +262,14 @@ intersphinx_mapping = {
 }
 
 try:
-    __import__('flask_theme_support')
-    pygments_style = 'flask_theme_support.FlaskyStyle'
+    __import__('flask_sphinx_themes')
     html_theme = 'flask'
     html_theme_options = {
         'touch_icon': 'touch-icon.png'
     }
 except ImportError:
-    print('-' * 74)
-    print('Warning: Flask themes unavailable.  Building with default theme')
-    print('If you want the Flask themes, run this command and build again:')
-    print()
-    print('  git submodule update --init')
-    print('-' * 74)
+    print('Flask theme unavailable; using the default theme.')
+    print('Install using `pip install Flask-Sphinx-Themes`.')
 
 
 # unwrap decorators