fix entrypoint dependency on top env

Author: radekg

injectors/entrypoint.go

@@ -24,11 +24,6 @@ func InjectEntrypoint(logger hclog.Logger, mmdsData *mmds.MMDSData, entrypointRu
 		return nil // nothing to do
 	}
 
-	if len(mmdsData.Env) == 0 {
-		logger.Debug("env empty, nothing to do")
-		return nil // nothing to do
-	}
-
 	// make sure a parent directory exists:
 	dirExists, err := pathExists(filepath.Dir(entrypointRunnerPath))
 	if err != nil {

injectors/shared_test.go

@@ -277,9 +277,13 @@ func TestInjectEntrypoint(t *testing.T) {
 		t.Fatal("expected fetch to succeed but received an error:", err)
 	}
 
+	newMMDSData := &mmds.MMDSData{
+		EntrypointJSON: mmdsData.EntrypointJSON,
+	}
+
 	file := filepath.Join(tempDir, "usr/bin/firebuild-entrypoint.sh")
 
-	if err := InjectEntrypoint(hclog.Default(), mmdsData, file); err != nil {
+	if err := InjectEntrypoint(hclog.Default(), newMMDSData, file); err != nil {
 		t.Fatal("expected the entrypoint runner to be injected but received an error:", err)
 	}