clean up

lib/installer.js

@@ -110,10 +110,10 @@ function setGoEnvironmentVariables(goRoot) {
     const goPath = process.env['GOPATH'] || '';
     const goBin = process.env['GOBIN'] || '';
     // set GOPATH and GOBIN as user value
-    if (!util.isNullOrUndefined(goPath)) {
+    if (goPath) {
         core.exportVariable('GOPATH', goPath);
     }
-    if (!util.isNullOrUndefined(goBin)) {
+    if (goBin) {
         core.exportVariable('GOBIN', goBin);
     }
 }

src/installer.ts

@@ -106,10 +106,10 @@ function setGoEnvironmentVariables(goRoot: string) {
   const goBin: string = process.env['GOBIN'] || '';
 
   // set GOPATH and GOBIN as user value
-  if (!util.isNullOrUndefined(goPath)) {
+  if (goPath) {
     core.exportVariable('GOPATH', goPath);
   }
-  if (!util.isNullOrUndefined(goBin)) {
+  if (goBin) {
     core.exportVariable('GOBIN', goBin);
   }
 }