fixed arg check in dge_bigwig

dge_workflow/dge_utils.sh

@@ -190,13 +190,15 @@ fi
 genomeFai=$1
 bamFiles="${@:2}"
 
-if [ ! -f "${genomeFai}" ]; then
-    echo "could not find fai index $1! ${usage}" >&2 ; return;
+if [ ! -f "${genomeFai}" ] || [ ${genomeFai: -4} != ".fai" ]; then
+    echo "Could not find fai index $1!
+    ${usage}" >&2 ; return;
 fi
 
 
 if [ -z "$(which wigToBigWig 2>/dev/null)" ]; then
-    echo "could not find wigToBigWig in PATH! ${usage}" >&2 ; #return;
+    echo "Could not find wigToBigWig in PATH!
+    ${usage}" >&2 ; #return;
 fi
 
 jl reset .bigwig