Expose logo_link in theme.conf (#1850)

This fixes #1664,
I'm not a 100% sure if this is enough to let downstream projects set
custom links.

Should I also add any specific docs here?

I think we should also be able to remove this config setting if we can
move to theme.toml (as in
#1776).

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Daniel McCloy <dan@mccloy.info>

Author: 3 people

src/pydata_sphinx_theme/__init__.py

@@ -158,6 +158,9 @@ def update_config(app):
         theme_logo = {}
     if not isinstance(theme_logo, dict):
         raise ValueError(f"Incorrect logo config type: {type(theme_logo)}")
+    theme_logo_link = theme_options.get("theme_logo_link")
+    if theme_logo_link:
+        theme_logo["link"] = theme_logo_link
     theme_options["logo"] = theme_logo
 
 

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/navbar-logo.html

@@ -1,11 +1,15 @@
 {# Displays the logo of your documentation site, in the header navbar. #}
 {# Logo link generation -#}
-{% if not theme_logo.get("link") %}
-  {% set href = pathto(root_doc) %}
-{% elif hasdoc(theme_logo.get("link")) %}
-  {% set href = pathto(theme_logo.get("link")) %} {# internal page #}
+{% if theme_logo_link %}
+  {% set href = theme_logo_link %}
 {% else %}
-  {% set href = theme_logo.get("link") %} {# external url #}
+  {% if not theme_logo.get("link") %}
+    {% set href = pathto(root_doc) %}
+  {% elif hasdoc(theme_logo.get("link")) %}
+    {% set href = pathto(theme_logo.get("link")) %} {# internal page #}
+  {% else %}
+    {% set href = theme_logo.get("link") %} {# external url #}
+  {% endif %}
 {% endif %}
 
 {#- Logo HTML and image #}

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/theme.conf

@@ -34,6 +34,7 @@ check_switcher = True
 pygments_light_style = a11y-high-contrast-light
 pygments_dark_style = a11y-high-contrast-dark
 logo =
+logo_link =
 surface_warnings = True
 back_to_top_button = True