IDS-9779: Fix modeler elements error (#138)

* add warning to modeler installer

* added warning to linux modeler script

* add exit when elements JSON is missing

* exiting echo

install/modeler/install_linux_modeler.sh

@@ -1,12 +1,27 @@
 #!/bin/bash
 
+ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
 echo
 echo "Camunda Modeler Installer for Linux"
 echo
 echo "This will install the Camunda Modeler in this directory:"
 pwd
 echo
 
+if [ ! -f "elements.json" ]; then
+    echo "****************************************"
+    echo "*************** WARNING ! **************"
+    echo "****************************************"
+    echo "+--------------------------------------+"
+    echo "File 'elements.json' does not exists in ${ROOT} directory   "
+    echo "+--------------------------------------+"
+    echo
+    echo "Run the Camunda Modeler Installer from 'modeler/' folder or copy elements.json to '${ROOT}' before running modeler script "
+    echo "Exiting..."
+    exit 1
+fi
+
 # Confirm Install
 while [[ ! $REPLY =~ ^(y|Y|n|N)$ ]]; do
   read -p "Press Y to continue or N to abort. (Y/N): " REPLY

install/modeler/install_mac_modeler.sh

@@ -1,9 +1,24 @@
 #!/bin/bash
 
+ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
 echo
 echo "Camunda Modeler Installer for Mac OS"
 echo
 
+if [ ! -f "elements.json" ]; then
+    echo "****************************************"
+    echo "*************** WARNING ! **************"
+    echo "****************************************"
+    echo "+--------------------------------------+"
+    echo "File 'elements.json' does not exists in ${ROOT} directory   "
+    echo "+--------------------------------------+"
+    echo
+    echo "Run the Camunda Modeler Installer from 'modeler/' folder or copy elements.json to '${ROOT}' before running modeler script "
+    echo "Exiting..."
+    exit 1
+fi
+
 if [ ! -d "/Applications" ]; then
   echo "Error: Cannot find '/Applications' directory.  Is this a Mac OS machine?"
   echo "Exiting..."