adjusting for version input

install.sh

@@ -32,24 +32,22 @@ function fixVersion {
 }
 
 #start script
-echo "Starting Golang install"
-
-#validate version and architecture
 echo "Parsing go version"
-#looking for go version in go.mod file, only checking up to minor version ignoring patch value to allow for stable versions
-# -P uses perl syntax
-DL_VERSION_RAW="$(grep "^go [0-9]+.[0-9]+" go.mod -P)"
-if [[ -z "$DL_VERSION_RAW" ]]; then
-  #no go.mod file found
-  DL_VERSION_RAW=$GO_INSTALL_VERSION
-  #no version input set either
-  if [[ "$DL_VERSION_RAW" == "." ]]; then
-    echo "FATAL: No Go version found, set version input if no go.mod file is present"
-    exit 1
+#check install version field first
+if [[ -z $GO_INSTALL_VERSION ]]; then
+  # -P uses perl syntax
+  DL_VERSION_RAW="$(grep "^go [0-9]+.[0-9]+" go.mod -P)"
+  if [[ -z "$DL_VERSION_RAW" ]]; then
+      echo "FATAL: No Go version found, set version input if no go.mod file is present"
+      exit 1
+  else
+    fixVersion
   fi
 else
-  fixVersion
+  DL_VERSION_RAW="$GO_INSTALL_VERSION"
 fi
+
+
 echo "Found go version: ${DL_VERSION_RAW}"
 
 DL_ARCH=$GO_INSTALL_ARCH