Add code lint check

.woodpecker.yml

@@ -1,4 +1,16 @@
 pipeline:
+  lint:
+    image: golangci/golangci-lint:latest-alpine
+    pull: true
+    commands:
+    - golangci-lint run ./...
+    when:
+      event:
+      - push
+      - pull_request
+      branch:
+      - main
+
   test:
     image: golang:1.18
     pull: true

cmd/pipeline-convert/main.go

@@ -112,12 +112,12 @@ Currently supports converting from Drone CI pipelines to Woodpecker CI pipeline
 		}
 		if sourcePath == "" {
 			fmt.Println("Error: source path is required")
-			cmd.Help()
+			_ = cmd.Help()
 			os.Exit(1)
 		}
 		if destPath == "" {
 			fmt.Println("Error: destination path is required")
-			cmd.Help()
+			_ = cmd.Help()
 			os.Exit(1)
 		}
 		sources, err := ReadSource(sourcePath)

secrets.go

@@ -16,7 +16,7 @@ type Secrets []Secret
 func (s Secrets) MarshalYAML() (interface{}, error) {
 	arr := make([]interface{}, 0, len(s))
 	for _, secret := range s {
-		if secret.Target == "" || strings.ToLower(secret.Source) == strings.ToLower(secret.Target) {
+		if secret.Target == "" || strings.EqualFold(secret.Source, secret.Target) {
 			arr = append(arr, Secret{
 				Source: secret.Source,
 				Target: strings.ToLower(secret.Target),