fix issue when duplicate imports (#99)

Signed-off-by: Loong <[email protected]>

Author: daixiang0

pkg/gci/internal/testdata/duplicate-imports.cfg.yaml

@@ -0,0 +1,4 @@
+sections:
+  - Standard
+  - Default
+  - Prefix(github.com/daixiang0)

pkg/gci/internal/testdata/duplicate-imports.in.go

@@ -0,0 +1,9 @@
+package main
+import (
+	"fmt"
+
+	g "github.com/golang"
+
+	a "github.com/daixiang0/gci"
+	"github.com/daixiang0/gci"
+)

pkg/gci/internal/testdata/duplicate-imports.out.go

@@ -0,0 +1,9 @@
+package main
+import (
+	"fmt"
+
+	g "github.com/golang"
+
+	"github.com/daixiang0/gci"
+	a "github.com/daixiang0/gci"
+)

pkg/parse/parse.go

@@ -20,6 +20,10 @@ func (l ImportList) Len() int {
 }
 
 func (l ImportList) Less(i, j int) bool {
+	if strings.Compare(l[i].Path, l[j].Path) == 0 {
+		return strings.Compare(l[i].Name, l[j].Name) < 0
+	}
+
 	return strings.Compare(l[i].Path, l[j].Path) < 0
 }