Howto remove pages (#2933)

Closes #2930

---------

Signed-off-by: George Araújo <george.gcac@gmail.com>

CUSTOMIZE.md

@@ -154,6 +154,80 @@ You can add a newsletter subscription form by adding the specified information a
 
 Depending on your specified footer behavior, the sign up form either will appear at the bottom of the `About` page and at the bottom of blogposts if `related_posts` are enabled, or in the footer at the bottom of each page.
 
+## Removing content
+
+Since this template have a lot of content, you may want to delete some of it. Here is a list of the main components that you may want to delete, and how to do it. Don't forget if you delete a page, to update the `nav_order` of the remaining pages.
+
+### Removing the blog page
+
+To remove the blog, you have to:
+
+- delete [\_posts](_posts/) directory
+- delete blog page [\_pages/blog.md](_pages/blog.md)
+- remove reference to blog page in our [\_pages/dropdown.md](_pages/dropdown.md)
+- remove the `Blog` section in the [\_config.yml](_config.yml) file and the related parts, like the `jekyll-archives` and `latest_posts`
+
+You can also:
+
+- delete [\_includes/latest_posts.liquid](_includes/latest_posts.liquid)
+- delete [\_includes/related_posts.liquid](_includes/related_posts.liquid)
+- delete [\_layouts/archive-category.liquid](_layouts/archive-category.liquid)
+- delete [\_layouts/archive-tag.liquid](_layouts/archive-tag.liquid)
+- delete [\_layouts/archive-year.liquid](_layouts/archive-year.liquid)
+- delete [\_plugins/external-posts.rb](_plugins/external-posts.rb)
+- remove the `jekyll-archives` gem from the [Gemfile](Gemfile) and the `plugins` section in [\_config.yml](_config.yml)
+- remove the `classifier-reborn` gem from the [Gemfile](Gemfile)
+
+### Removing the news section
+
+To remove the news section, you can:
+
+- delete the [\_news](_news/) directory
+- delete the file [\_includes/news.liquid](_includes/news.liquid) and the references to it in the [\_pages/about.md](_pages/about.md)
+- remove the `announcements` part in [\_config.yml](_config.yml)
+- remove the news part in the `Collections` section in the [\_config.yml](_config.yml) file
+
+### Removing the projects page
+
+To remove the projects, you can:
+
+- delete the [\_projects](_projects/) directory
+- delete the projects page [\_pages/projects.md](_pages/projects.md)
+- remove reference to projects page in our [\_pages/dropdown.md](_pages/dropdown.md)
+- remove projects part in the `Collections` section in the [\_config.yml](_config.yml) file
+
+You can also:
+
+- delete [\_includes/projects_horizontal.liquid](_includes/projects_horizontal.liquid)
+- delete [\_includes/projects.liquid](_includes/projects.liquid)
+
+### Removing the publications page
+
+To remove the publications, you can:
+
+- delete the [\_bibliography](_bibliography/) directory
+- delete the publications page [\_pages/publications.md](_pages/publications.md)
+- remove reference to publications page in our [\_pages/dropdown.md](_pages/dropdown.md)
+- remove `Jekyll Scholar` section in the [\_config.yml](_config.yml) file
+
+You can also:
+
+- delete the [\_layouts/bib.liquid](_layouts/bib.liquid) file
+- delete [\_includes/bib_search.liquid](_includes/bib_search.liquid)
+- delete [\_includes/citation.liquid](_includes/citation.liquid)
+- delete [\_includes/selected_papers.liquid](_includes/selected_papers.liquid)
+- delete [\_plugins/google-scholar-citations.rb](_plugins/google-scholar-citations.rb)
+- delete [\_plugins/hide-custom-bibtex.rb](_plugins/hide-custom-bibtex.rb)
+- delete [\_plugins/inspirehep-citations.rb](_plugins/inspirehep-citations.rb)
+- remove the `jekyll-scholar` gem from the [Gemfile](Gemfile) and the `plugins` section in [\_config.yml](_config.yml)
+
+### Removing the repositories page
+
+To remove the repositories, you can:
+
+- delete the repositories page [\_pages/repositories.md](_pages/repositories.md)
+- delete [\_includes/repository/](_includes/repository/) directory
+
 ## Adding Token for Lighthouse Badger
 
 To add secrets for [lighthouse-badger](https://github.com/alshedivat/al-folio/actions/workflows/lighthouse-badger.yml), create a [personal access token (PAT)](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens#creating-a-fine-grained-personal-access-token) and add it as a [secret](https://docs.github.com/en/actions/security-guides/using-secrets-in-github-actions#creating-encrypted-secrets-for-a-repository) named `LIGHTHOUSE_BADGER_TOKEN` to your repository. The [lighthouse-badger documentation](https://github.com/MyActionWay/lighthouse-badger-workflows#lighthouse-badger-easyyml) specifies using an environment variable, but using it as a secret is more secure and appropriate for a PAT.

_layouts/about.liquid

@@ -41,7 +41,7 @@ layout: default
     <div class="clearfix">{{ content }}</div>
 
     <!-- News -->
-    {% if page.news and site.announcements.enabled %}
+    {% if page.news and site.announcements and site.announcements.enabled %}
       <h2>
         <a href="{{ '/news/' | relative_url }}" style="color: inherit">news</a>
       </h2>
@@ -49,7 +49,7 @@ layout: default
     {% endif %}
 
     <!-- Latest posts -->
-    {% if site.latest_posts.enabled %}
+    {% if site.latest_posts and site.latest_posts.enabled %}
       <h2>
         <a href="{{ '/blog/' | relative_url }}" style="color: inherit">latest posts</a>
       </h2>
@@ -73,7 +73,7 @@ layout: default
       </div>
     {% endif %}
 
-    {% if site.newsletter.enabled and site.footer_fixed %}
+    {% if site.newsletter and site.newsletter.enabled and site.footer_fixed %}
       {% include newsletter.liquid center=true %}
     {% endif %}
   </article>

_layouts/post.liquid

@@ -84,7 +84,7 @@ layout: default
     </div>
   {% endif %}
 
-  {% if site.related_blog_posts.enabled %}
+  {% if site.related_blog_posts and site.related_blog_posts.enabled %}
     {% if page.related_posts == null or page.related_posts %}
       {% include related_posts.liquid %}
     {% endif %}