Use pathlib for url _embed_code_links (#1157)

sphinx_gallery/docs_resolv.py

@@ -16,6 +16,7 @@
 import sys
 import urllib.request as urllib_request
 import urllib.parse as urllib_parse
+from pathlib import Path
 from urllib.error import HTTPError, URLError
 
 from sphinx.errors import ExtensionError
@@ -143,23 +144,22 @@ def __init__(self, config, doc_url, gallery_dir, relative=False):
         self.relative = relative
         self._link_cache = {}
 
-        if doc_url.startswith(('http://', 'https://')):
+        if isinstance(doc_url, Path):
+            index_url = os.path.join(doc_url, 'index.html')
+            searchindex_url = os.path.join(doc_url, 'searchindex.js')
+            docopts_url = os.path.join(
+                doc_url, '_static', 'documentation_options.js')
+        else:
             if relative:
                 raise ExtensionError(
                     'Relative links are only supported for local '
                     'URLs (doc_url cannot be absolute)')
             index_url = doc_url + '/'
             searchindex_url = doc_url + '/searchindex.js'
             docopts_url = doc_url + '/_static/documentation_options.js'
-        else:
-            index_url = os.path.join(doc_url, 'index.html')
-            searchindex_url = os.path.join(doc_url, 'searchindex.js')
-            docopts_url = os.path.join(
-                doc_url, '_static', 'documentation_options.js')
 
         # detect if we are using relative links on a Windows system
-        if (os.name.lower() == 'nt' and
-                not doc_url.startswith(('http://', 'https://'))):
+        if (os.name.lower() == 'nt' and isinstance(doc_url, Path)):
             if not relative:
                 raise ExtensionError(
                     'You have to use relative=True for the local'
@@ -328,7 +328,7 @@ def _embed_code_links(app, gallery_conf, gallery_dir):
             if url is None:
                 doc_resolvers[this_module] = SphinxDocLinkResolver(
                     app.config.sphinx_gallery_conf,
-                    str(app.builder.outdir), src_gallery_dir, relative=True)
+                    Path(app.builder.outdir), src_gallery_dir, relative=True)
             else:
                 doc_resolvers[this_module] = SphinxDocLinkResolver(
                     app.config.sphinx_gallery_conf,