fix handling directive comments

pkg/gimps/gimps.go

@@ -312,8 +312,15 @@ func removeEmptyImportNode(file *ast.File) {
 func importWithComment(imprt string, imports map[string]*importMetadata) string {
 	var comment string
 	if metadata, ok := imports[imprt]; ok && metadata.Comment != nil && len(metadata.Comment.List) > 0 {
+		// comments can be normal comments ("// foo bar") or special comments like "//foo bar";
+		// special comments will return an empty string if Text() is called.
 		// TODO: use TrimSpace() ? Can this be a multiline comment?
-		comment = fmt.Sprintf("// %s", strings.ReplaceAll(metadata.Comment.Text(), "\n", ""))
+		formatted := strings.ReplaceAll(metadata.Comment.Text(), "\n", "")
+		if len(formatted) == 0 {
+			comment = metadata.Comment.List[0].Text
+		} else {
+			comment = fmt.Sprintf("// %s", formatted)
+		}
 	}
 
 	return strings.TrimSpace(fmt.Sprintf("%s %s", imprt, comment))

pkg/gimps/testdata/comments-directives/config.yaml

@@ -0,0 +1,4 @@
+# This testcase reproduces
+# https://github.com/xrstf/gimps/issues/1
+
+projectName: go.xrstf.de/gimps/test

pkg/gimps/testdata/comments-directives/main.go.expected

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt" //nolint:typecheck
+	"log"
+)
+
+func main() {
+	fmt.Println("hello world")
+	log.Println("foo")
+}

pkg/gimps/testdata/comments-directives/main.go.input

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"log"
+)
+
+import (
+	"fmt" //nolint:typecheck
+)
+
+func main() {
+	fmt.Println("hello world")
+	log.Println("foo")
+}