Create a symbol link file named protoc-gen-goctl from goctl (#1076)

tools/goctl/util/env/env.go

@@ -11,10 +11,11 @@ import (
 )
 
 const (
-	bin            = "bin"
-	binGo          = "go"
-	binProtoc      = "protoc"
-	binProtocGenGo = "protoc-gen-go"
+	bin               = "bin"
+	binGo             = "go"
+	binProtoc         = "protoc"
+	binProtocGenGo    = "protoc-gen-go"
+	binProtocGenGoctl = "protoc-gen-goctl"
 )
 
 // LookUpGo searches an executable go in the directories
@@ -38,14 +39,22 @@ func LookUpProtoc() (string, error) {
 	return LookPath(xProtoc)
 }
 
-// LookUpProtocGenGo searches an executable protoc-gen-go in the directories
-// named by the PATH environment variable.
+// Deprecated: LookUpProtocGenGo searches an executable protoc-gen-go in the directories
+// named by the PATH environment variable, use LookUpProtocGenGoctl instead.
 func LookUpProtocGenGo() (string, error) {
 	suffix := getExeSuffix()
 	xProtocGenGo := binProtocGenGo + suffix
 	return LookPath(xProtocGenGo)
 }
 
+// LookUpProtocGenGoctl searches an executable protoc-gen-go in the directories
+// named by the PATH environment variable.
+func LookUpProtocGenGoctl() (string, error) {
+	suffix := getExeSuffix()
+	xProtocGenGo := binProtocGenGoctl + suffix
+	return LookPath(xProtocGenGo)
+}
+
 // LookPath searches for an executable named file in the
 // directories named by the PATH environment variable,
 // for the os windows, the named file will be spliced with the