how to get the location of the current file in revel

I am using golang revel web framework and
I am trying to create a sqlite db in the current working directory.

model.go

func New(dbName string,table string) *Db {
	_,filename,_,_ := runtime.Caller(1)
	db , err := sql.Open("sqlite3",path.Join(path.Dir(filename),dbName))
	if err != nil {
		log.Fatal(err)
	}
	err = db.Ping()
	if err != nil {
		log.Panic(err)
	}
	database := &Db{Database:db}
	_,err = db.Exec("create table %s" +
	"( id integer primary key, " +
	"name varchar(100),"+
	"email varchar(100),"+
	"branch varchar(100),"+
	"help varchar(100)",)
	if err != nil {
		log.Fatal(err)
	}

}

I have a test in place which just calls this function.

whenever i run the test using revel test or by going to the localhost:9000/@tests, the function Panics and the error message is
cannot open the database file.

The reason that is happening is because the filename returned by runtime.Caller(1) is /usr/local/go/src/runtime/asm_amd64.s for which the program has no permission.

if i directly write ./foo.db, even then the error shows.

I tried os.Getwd() which return empty string.

I also tried filepath.Abs(filepath.Dir(os.Args[0]))
but that returned /home/girish/GoProjects/bin/revel.d which is the revel binary.

So whats the best way to find the directory of the model.go?

It doesn't make sense to get the directory of the model.go file at runtime, because the compiled executable could be on a completely different filesystem.

You may want to get the directory of where the running executable was started from:

dir, err := filepath.Abs(filepath.Dir(os.Args[0]))

dir will be the folder where the program lives at runtime.