honor body_path input when provided. fixes #22

src/util.ts

@@ -1,5 +1,5 @@
 import * as glob from "glob";
-import { lstatSync } from "fs";
+import { lstatSync, readFileSync } from "fs";
 
 export interface Config {
   github_token: string;
@@ -14,6 +14,14 @@ export interface Config {
   input_prerelease?: boolean;
 }
 
+export const releaseBody = (config: Config): string | undefined => {
+  return (
+    config.input_body ||
+    (config.input_body_path &&
+      readFileSync(config.input_body_path).toString("utf8"))
+  );
+};
+
 type Env = { [key: string]: string | undefined };
 
 export const parseInputFiles = (files: string): string[] => {