refactor for cross platform use

src/main.ts

@@ -0,0 +1,27 @@
+import * as fs from 'fs';
+import * as core from '@actions/core';
+import { GitHub } from '@actions/github';
+import { paths, parseConfig, isTag } from './util';
+import { release, upload } from './github';
+
+async function run() {
+  try {
+    const config = parseConfig(process.env);
+    if (!isTag(config.github_ref)) {
+      throw new Error(`⚠️ GitHub Releases requires a tag`);
+    }
+    // todo: validate github_ref is a tag
+    const gh = new GitHub(config.github_token);
+    let rel = await release(config, gh);
+    if (config.input_files) {
+      paths(config.input_files).forEach(async (path) => {
+        await upload(gh, rel.upload_url, path)
+      });
+    }
+    console.log(`🎉 Release ready at ${rel.html_url}`)
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+run();