Add release body file

action.yml

@@ -10,6 +10,9 @@ inputs:
   body: 
     description: 'The release body'
     required: false
+  body_file:
+    description: 'The release body file'
+    required: false
   pre_release: 
     description: "Whether it's a pre release"
     required: false

main.go

@@ -26,6 +26,14 @@ func main() {
 	files := gha.GetInput("files")
 	title := gha.GetInput("title")
 	body := gha.GetInput("body")
+	bodyFile := gha.GetInput("body_file")
+	if body == "" && bodyFile != "" {
+		f, err := os.ReadFile(bodyFile)
+		if err != nil {
+			gha.Fatalf("read body file error: %s", err.Error())
+		}
+		body = string(f)
+	}
 	apiKey := gha.GetInput("api_key")
 	preRelease, _ := strconv.ParseBool(gha.GetInput("pre_release"))
 	draft, _ := strconv.ParseBool(gha.GetInput("draft"))