Espressif setup.sh corrections, error checking

IDE/Espressif/ESP-IDF/setup.sh

@@ -1,11 +1,19 @@
 #!/bin/bash
 
-# check if IDF_PATH is set
+# check if INSTALL_PATH is set
 if [ -z "$IDF_PATH" ]; then
-    echo "Please follows the instruction of ESP-IDF installation and set IDF_PATH."
+    echo "Please follows the instruction of ESP-IDF installation and set $IDF_PATH."
     exit 1
 fi
 
+# check if INSTALL_PATH is set
+if [ -z "$INSTALL_PATH" ]; then
+    echo "INSTALL_PATH not defined."
+    exit 1
+fi
+
+
+
 RMDCMD='/bin/rm -rf'
 MKDCMD='/bin/mkdir'
 CPDCMD='/bin/cp'
@@ -19,8 +27,8 @@ BASEDIR=`cd ${BASEDIR} && pwd -P`
 
 # echo $WOLFSSL_ESPIDFDIR
 
-WOLFSSLLIB_TRG_DIR=${IDF_PATH}/components/wolfssl
-WOLFSSLEXP_TRG_DIR=${IDF_PATH}/examples/protocols
+WOLFSSLLIB_TRG_DIR=${INSTALL_PATH}/components/wolfssl
+WOLFSSLEXP_TRG_DIR=${INSTALL_PATH}/examples/protocols
 
 if [ "$1" == "--verbose" ]; then
   WOLFSSL_SETUP_VERBOSE=true
@@ -36,15 +44,15 @@ if [ "${WOLFSSL_SETUP_VERBOSE}" == "true" ]; then
   echo ""
 fi
 
-if [ ! -d $IDF_PATH ]; then
-    echo "ESP-IDF Development Framework doesn't exist.: $IDF_PATH"
+if [ ! -d $INSTALL_PATH ]; then
+    echo "ESP-IDF Development Framework doesn't exist.: $INSTALL_PATH"
     exit 1
 fi
 
 # Copy files into ESP-IDF development framework
-pushd $IDF_PATH > /dev/null
+pushd $INSTALL_PATH > /dev/null
 
-echo "Copy files into $IDF_PATH"
+echo "Copy files into $INSTALL_PATH"
 
 # Remove/Create directories
 if [ "${WOLFSSL_SETUP_VERBOSE}" == "true" ]; then