Local flag not working with non URL package names

[andrazk]

In my project I'm using single name like foo instead of full URL package names (e.g. github.com/user/foo). In cases like this local flag is not used and packages are not grouped after 3rd party packages.

Example

Here is a simplified example of the problem.

Go version: 1.15.1
GCI version: 0.2.4

go.mod

module foo

go 1.15

main.go

package main

import (
	"fmt"

	"foo/bar"
)

func main() {
	fmt.Println("foo", bar.Bar())
}

Actual output

> gci -d -local foo main.go
diff -u main.go.orig main.go
--- main.go.orig        2020-09-23 12:48:27.973264200 +0200
+++ main.go     2020-09-23 12:48:27.973822200 +0200
@@ -2,7 +2,6 @@
 
 import (
        "fmt"
-
        "foo/bar"
 )

Expected output

The expected behavior should be for command to pass without errors.

[jamesvoong]

I am also seeing this on 0.2.4 and 1.14.1, also occurs through golangci-lint

[kwo]

I am having the same issue as I also use module names that are a single word and not a URL. The culprit is the following line in the function getPkgType https://github.com/daixiang0/gci/blob/master/pkg/gci/gci.go#L161 . Apparently, if a package name does not contain a dot, it is considered to be part of the standard library. The function could be changed to first check if the line in question starts with the local flag, and then to determine if the package name is part of the stdlib or not.