Fix cpinstall tag for kong-mesh

There's a slight difference between Kuma and Kong Mesh in terms of the
base segment of the docs' url.
For Kuma, all the docs live under `/docs/`. Unfortunately, that's not
the case for Kong Mesh. Kong docs renders multiple products, so we
namespace the docs with the corresponding product name, i.e. they live
under `/mesh/`.

This commit updates the tag's code so that it uses the base path in which the
page is generated as the first url segment. That way we can re-use the
code in both platforms.

It also modifies the link that is rendered, so that it uses `page.release`
instead of `page.version` so that it also works for both docs sites.

Signed-off-by: Fabian Rodriguez <[email protected]>

jekyll-kuma-plugins/lib/jekyll/kuma-plugins/liquid/tags/cpinstall.rb

@@ -22,6 +22,7 @@ def render(context)
             content = super
             return "" unless content != ""
             site_data = context.registers[:site].config
+            page = context.environments.first['page']
 
             opts = content.strip.split("\n").map do |x|
                 x = site_data['set_flag_values_prefix'] + x if @prefixed
@@ -39,7 +40,7 @@ def render(context)
 ```
 {% endtab %}
 {% tab #{@tabs_name} helm %}
-Before using {{site.mesh_product_name}} with helm, please follow [these steps](/docs/{{ page.version }}/production/cp-deployment/kubernetes/#helm) to configure your local helm repo.
+Before using {{site.mesh_product_name}} with helm, please follow [these steps](/#{product_url_segment(page)}/{{ page.release }}/production/cp-deployment/kubernetes/#helm) to configure your local helm repo.
 ```shell
 helm install --create-namespace --namespace {{site.mesh_namespace}} \\
   #{res} \\
@@ -49,6 +50,10 @@ def render(context)
 {% endtabs %}"
             ::Liquid::Template.parse(htmlContent).render(context)
           end
+
+          def product_url_segment(page)
+            page['dir'].split('/')[1]
+          end
         end
       end
     end