Sharing variables between two source files in one package

Question

I am working on a project in Go. For organization, I have code divided into files:

• server-related functions go to server.go
• data processing in db.go
• global variables are in types.go
• and etc.

I declared the document_root variable in types.go and defined it in main.go with:

 document_root,error := config.GetString("server","document_root") 

In server.go, I have a function to generate an HTTP status code for the requested file, and it does the following:

 _, err := os.Stat(document_root+"/"+filename); 

When compiling, I get this error:

"document_root declared and not used"

What am I doing wrong?

Answer 1

I assume in types.go, you declare document_root in the package scope. If so, the problem is this line:

 document_root, error := config.GetString("server", "document_root") 

Here, you inadvertently create another document_root variable local to the main function. You need to write something like this:

 var err error document_root, err = config.GetString("server", "document_root")