From c4e170a545daa8d75a16735e5f8987729383b736 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?T=C3=B8nnes=20Nygaard?= <tonnes.nygaard@gmail.com>
Date: Sun, 1 May 2022 17:38:39 +0200
Subject: [PATCH] Added bibtex filter to hide custom bibtex keywords from bib
 file output (#652)

---
 _config.yml                  |  1 +
 _layouts/bib.html            |  2 +-
 _plugins/hideCustomBibtex.rb | 15 +++++++++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 _plugins/hideCustomBibtex.rb

diff --git a/_config.yml b/_config.yml
index bdafe4e..ceab6f8 100644
--- a/_config.yml
+++ b/_config.yml
@@ -237,6 +237,7 @@ scholar:
 
   query: "@*"
 
+filtered_bibtex_keywords: [abbr, abstract, arxiv, bibtex_show, html, pdf, selected, supp, blog, code, poster, slides, website] # Filter out certain bibtex entry keywords used internally from the bib output
 
 # -----------------------------------------------------------------------------
 # Responsive WebP Images
diff --git a/_layouts/bib.html b/_layouts/bib.html
index 8e80c42..c57bff3 100644
--- a/_layouts/bib.html
+++ b/_layouts/bib.html
@@ -153,7 +153,7 @@
           {% if entry.bibtex_show -%}
           <!-- Hidden bibtex block -->
           <div class="bibtex hidden">
-            {% highlight bibtex %}{{ entry.bibtex }}{% endhighlight %}
+            {% highlight bibtex %}{{ entry.bibtex | hideCustomBibtex }}{% endhighlight %}
           </div>
           {%- endif %}
         </div>
diff --git a/_plugins/hideCustomBibtex.rb b/_plugins/hideCustomBibtex.rb
new file mode 100644
index 0000000..4a852fd
--- /dev/null
+++ b/_plugins/hideCustomBibtex.rb
@@ -0,0 +1,15 @@
+ module Jekyll
+  module HideCustomBibtex
+    def hideCustomBibtex(input)
+	  keywords = @context.registers[:site].config['filtered_bibtex_keywords']
+
+	  keywords.each do |keyword|
+		input = input.gsub(/^.*#{keyword}.*$\n/, '')
+	  end
+
+      return input
+    end
+  end
+end
+
+Liquid::Template.register_filter(Jekyll::HideCustomBibtex)