Add checks for DAG, show errors also on Mac

init.sh

@@ -10,18 +10,27 @@ fi
 if [[ "$unamestr" == 'Linux' ]]; then
     platform='Linux'
     if [[ -d /cvmfs/fcc.cern.ch/sw ]] ; then
-    #should check domain to make sure we're at CERN
-    #or is this software available somewhere in Lyon?
-    source /cvmfs/fcc.cern.ch/sw/0.8/init_fcc_stack.sh
+        #should check domain to make sure we're at CERN
+        #or is this software available somewhere in Lyon?
+        source /cvmfs/fcc.cern.ch/sw/0.8/init_fcc_stack.sh
     else
-        if [ -z "$PODIO" ]; then
-            echo "[ERROR] no podio setup detected, make sure it is setup"
-            exit 1
+        if [ ! -z "$PODIO" ]; then
+            export LD_LIBRARY_PATH=$FCCEDM/lib:$PODIO/lib:$LD_LIBRARY_PATH
         fi
-        export LD_LIBRARY_PATH=$FCCEDM/lib:$PODIO/lib:$LD_LIBRARY_PATH
     fi
 elif [[ "$unamestr" == 'Darwin' ]]; then
     platform='Darwin'
-    export DYLD_LIBRARY_PATH=$FCCEDM/lib:$DYLD_LIBRARY_PATH:$PODIO/lib
+    if [ ! -z "$PODIO" ]; then
+        export DYLD_LIBRARY_PATH=$FCCEDM/lib:$DYLD_LIBRARY_PATH:$PODIO/lib
+    fi
+fi
+if [ -z "$PODIO" ]; then
+    echo "[ERROR] no podio setup detected, make sure it is setup"
+    exit 1
 fi
+if [ -z "$FCCDAG" ]; then
+    echo "[ERROR] no dag setup detected, make sure it is setup by setting the FCCDAG environment variable or adding it to your cmake prefix path"
+    exit 1
+fi
+
 echo platform detected: $platform