[tools, extras] morfessor installation script

tools/extras/install_morfessor.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Copyright  2017  Atlas Guide (Author : Lucas Jo)
+#
+# Apache 2.0
+#
+
+echo "#### installing morfessor"
+dirname=morfessor
+if [ ! -d ./$dirname ]; then
+  mkdir -p ./$dirname
+  git clone https://github.com/aalto-speech/morfessor.git morfessor ||
+    {
+      echo  >&2 "$0: Error git clone operation "
+      echo  >&2 "  Failed in cloning the github repository (https://github.com/aalto-speech/morfessor.git)"
+      exit
+    }
+fi
+
+# env.sh setup
+(
+  set +u
+  [ ! -z "${MORFESSOR}" ] && \
+    echo >&2 "morfessor variable is aleady defined. undefining..." && \
+    unset MORFESSOR
+
+  [ -f ./env.sh ] && . ./env.sh
+
+  [ ! -z "${MORFESSOR}" ] && \
+    echo >&2 "MORFESSOR config is already in env.sh" && exit
+
+  wd=`pwd`
+  wd=`readlink -f $wd || pwd`
+
+  echo "export MORFESSOR=\"$wd/morfessor\""
+  echo "export PATH=\"\$PATH:\${MORFESSOR}/scripts\""
+  echo "export PYTHONPATH=\"\${PYTHONPATH:-}:\$MORFESSOR\""
+) >> env.sh
+
+echo >&2 "installation of MORFESSOR finished successfully"
+echo >&2 "please source tools/env.sh in your path.sh to enable it"