From eac2880c249abd3c2f81b619250fff361490decc Mon Sep 17 00:00:00 2001
From: Matthias Geerdsen <matthias.geerdsen@intranda.com>
Date: Mon, 22 Oct 2018 14:28:14 +0200
Subject: [PATCH] avoid unbound variable TESSDATA_PREFIX

set TESSDATA_PREFIX as empty, if not defined in environment to avoid an
unbound variable
---
 src/training/tesstrain_utils.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/training/tesstrain_utils.sh b/src/training/tesstrain_utils.sh
index 6494676d08..e9818aab4d 100644
--- a/src/training/tesstrain_utils.sh
+++ b/src/training/tesstrain_utils.sh
@@ -52,6 +52,9 @@ RUN_SHAPE_CLUSTERING=0
 EXTRACT_FONT_PROPERTIES=1
 WORKSPACE_DIR=$(mktemp -d)
 
+# set TESSDATA_PREFIX as empty, if not defined in environment to avoid an unbound variable
+TESSDATA_PREFIX=${TESSDATA_PREFIX:-}
+
 # Logging helper functions.
 tlog() {
     echo -e $* 2>&1 1>&2 | tee -a ${LOG_FILE}