From b75ea3e5f0b8c5074b871631fdde5b6eb1f523ad Mon Sep 17 00:00:00 2001
From: Ricardo Langner <ricardo.langner@googlemail.com>
Date: Sun, 12 May 2013 23:16:19 +0200
Subject: [PATCH] - Feature: new package option for citation management tool
 (bib engine), biber or bibtex

---
 cleanthesis.sty | 7 ++++++-
 cleanthesis.tex | 7 +++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/cleanthesis.sty b/cleanthesis.sty
index 0bab262..203e94a 100644
--- a/cleanthesis.sty
+++ b/cleanthesis.sty
@@ -101,6 +101,11 @@
 \define@choicekey*[ct]{cthesis}{colortheme}[\val\themenr]{bluemagenta,bluegreen}[bluemagenta]{\def\cthesis@colortheme{\themenr}}
 \setkeys[ct]{cthesis}{colortheme=bluemagenta}
 
+% OPTION bibsys
+% --> values = biber|bibtex
+\define@choicekey*[ct]{cthesis}{bibsys}[\val\colorizenr]{biber,bibtex}[bibtex]{\def\cthesis@bibsys{#1}}
+\setkeys[ct]{cthesis}{bibsys=bibtex}
+
 \DeclareOptionX*{
 	\PackageWarning{cleanthesis}{Unknown option ‘\CurrentOption’}%
 }
@@ -282,7 +287,7 @@
 ]{csquotes}
 %
 \RequirePackage[					% use biblatex for bibliography
-%	backend=biber,					% 	- use biber backend (bibtex replacement)
+	backend=\cthesis@bibsys,		% 	- use biber backend (bibtex replacement) or bibtex
 	bibencoding=utf8,				% 	- use auto file encode
 	style=alphabetic,				% 	- use alphabetic (or numeric) bib style
 	natbib=true,					% 	- allow natbib commands
diff --git a/cleanthesis.tex b/cleanthesis.tex
index a519cca..b9529e5 100644
--- a/cleanthesis.tex
+++ b/cleanthesis.tex
@@ -111,6 +111,13 @@ This option can be used to define a different label separator for cations of fig
 
 \optitem[bluemagenta]{colortheme}{\opt{bluemagenta},\opt{bluegreen}}
 
+\optitem[bibtex]{bibsys}{\opt{biber},\opt{bibtex}}
+
+Sets whether to use \texttt{biber} or \texttt{bibtex} as citation management tool (engine).
+The default (still) is \texttt{bibtex}.
+
+"\texttt{Biber} [is] a BibTeX replacement for users of BibLaTeX", see <http://biblatex-biber.sourceforge.net/>.
+
 \end{optionlist}
 
 \end{document}