From 05104b607bd8010a98840d6fd6291dd49f7a322d Mon Sep 17 00:00:00 2001
From: Jan Trmal <yendovy.konference@seznam.cz>
Date: Mon, 14 Nov 2016 14:55:46 -0500
Subject: [PATCH] check for swig and produce meaningful info

---
 tools/extras/install_sequitur.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/extras/install_sequitur.sh b/tools/extras/install_sequitur.sh
index b03020f292d..02145c7f0c8 100755
--- a/tools/extras/install_sequitur.sh
+++ b/tools/extras/install_sequitur.sh
@@ -36,6 +36,11 @@ else
   fi
 fi
 
+command -v swig >/dev/null 2>&1 || {
+  echo >&2 "$0: Error: I require swig but it's not installed.";
+  echo >&2 "  Please install swig and run this script again. "
+  exit 1;
+}
 
 if [ -d ./g2p ] || [ -d sequitur ] ; then
   echo  >&2 "$0: Warning: old installation of Sequitur found. You should manually"
@@ -59,7 +64,7 @@ if [ ! -d ./sequitur-g2p ] ; then
   }
 fi
 #just to retain backward compatibility for a while. Can be removed
-#in a couple of months. 
+#in a couple of months.
 ln -sf sequitur-g2p sequitur