From a6772a045093c36e2ef3a1b128804bc78c644fb6 Mon Sep 17 00:00:00 2001
From: Erik Hahn <erik_hahn@gmx.de>
Date: Sat, 6 Jun 2015 20:55:18 +0200
Subject: [PATCH 1/2] Use Fira fonts when compiling with Luatex

---
 beamerthemem.sty | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/beamerthemem.sty b/beamerthemem.sty
index b8b8ac4..b634f7c 100644
--- a/beamerthemem.sty
+++ b/beamerthemem.sty
@@ -52,14 +52,24 @@
 \RequirePackage{etoolbox}
 \RequirePackage{tikz}
 \RequirePackage{pgfplots}
-\RequirePackage{ifxetex}
+\RequirePackage{ifxetex,ifluatex}
+\newif\ifxetexorluatex
+\ifxetex
+  \xetexorluatextrue
+\else
+  \ifluatex
+    \xetexorluatextrue
+  \else
+    \xetexorluatexfalse
+  \fi
+\fi
 
 \usetikzlibrary{backgrounds}
 \usetikzlibrary{calc}
 
 \usecolortheme{metropolis}
 
-\ifxetex
+\ifxetexorluatex
   \usefonttheme{metropolis}
 \else
   \PackageWarning{beamerthemem}{You need to compile with XeLaTeX for the Fira fonts.}

From 8fe6d5dcc8c4c265b4cd55552caab1d390fa8724 Mon Sep 17 00:00:00 2001
From: Erik Hahn <erik_hahn@gmx.de>
Date: Sun, 7 Jun 2015 01:34:41 +0200
Subject: [PATCH 2/2] Also mention Lualatex in the warning message

---
 beamerthemem.sty | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/beamerthemem.sty b/beamerthemem.sty
index b634f7c..437410f 100644
--- a/beamerthemem.sty
+++ b/beamerthemem.sty
@@ -72,7 +72,7 @@
 \ifxetexorluatex
   \usefonttheme{metropolis}
 \else
-  \PackageWarning{beamerthemem}{You need to compile with XeLaTeX for the Fira fonts.}
+  \PackageWarning{beamerthemem}{You need to compile with XeLaTeX or LuaLaTeX for the Fira fonts.}
 \fi
 
 %}}}