1 files changed, 12 insertions, 4 deletions
diff --git a/setup.sh b/setup.sh
index e25ec73..5adcc67 100755
--- a/setup.sh
+++ b/setup.sh
@@ -43,10 +43,18 @@ if [ -f xtract."$osname" ]
 then
   chmod +x xtract."$osname"
 else
-  echo "Unable to download a prebuilt xtract executable; attempting to"
-  echo "build one from xtract.go.  A Perl fallback is also available, and"
-  echo "will be used if necessary, so please disregard any errors below."
-  go build -o xtract."$osname" xtract.go
+  if hash go 2>/dev/null
+  then
+    echo "Unable to download xtract executable; building from xtract.go."
+    go build -o xtract."$osname" xtract.go
+  fi
+  if [ ! -f xtract."$osname" ]
+  then
+    echo -e "Unable to download xtract executable. Please execute the following:\n\n"
+    echo -e "  ./ftp-cp ftp.ncbi.nlm.nih.gov /entrez/entrezdirect xtract.$osname.gz"
+    echo -e "  gunzip -f xtract.$osname.gz\n"
+    echo -e "  chmod +x xtract.$osname\n"
+  fi
 fi
 
 echo ""