fix one import case (#78)

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

Author: daixiang0

pkg/gci/gci.go

@@ -130,6 +130,11 @@ func LoadFormatGoFile(file io.FileObj, cfg config.Config) (src, dist []byte, err
 		return nil, nil, err
 	}
 
+	// do not do format if only one import
+	if len(imports) == 1 {
+		return src, src, nil
+	}
+
 	result, err := format.Format(imports, &cfg)
 	if err != nil {
 		return nil, nil, err

pkg/gci/internal/testdata/one-import-one-line.cfg.yaml

@@ -0,0 +1 @@
+common.cfg.yaml

pkg/gci/internal/testdata/one-import-one-line.in.go

@@ -0,0 +1,6 @@
+package main
+
+import "fmt"
+
+func main() {
+}

pkg/gci/internal/testdata/one-import-one-line.out.go

@@ -0,0 +1,6 @@
+package main
+
+import "fmt"
+
+func main() {
+}

pkg/gci/internal/testdata/one-import.cfg.yaml

@@ -0,0 +1 @@
+common.cfg.yaml

pkg/gci/internal/testdata/one-import.in.go

@@ -0,0 +1,7 @@
+package main
+import (
+	"fmt"
+)
+
+func main() {
+}

pkg/gci/internal/testdata/one-import.out.go

@@ -0,0 +1,7 @@
+package main
+import (
+	"fmt"
+)
+
+func main() {
+}