Add missing files

index.js

@@ -1,13 +1,15 @@
 const core = require('@actions/core');
-const {gitup} = require('./setup');
+const {gitup, envup} = require('./setup');
 
 // most @actions toolkit packages have async methods
 async function run() {
   try {
-    const ms = core.getInput('token');
+    // get input
+    const token = core.getInput('token');
 
+    // setup env
     core.info(`Setup env ...`);
-    await envup();
+    envup();
 
     // setup git
     core.info(`Setup git ...`);

setup.js

@@ -0,0 +1,41 @@
+const {exec} = require('child_process');
+const core = require('@actions/core');
+
+/**
+ * Execute simple shell command (async wrapper).
+ * @param {String} cmd
+ * @return {Object} { stdout: String, stderr: String }
+ */
+async function sh(cmd) {
+  return new Promise(function (resolve, reject) {
+    exec(cmd, (err, stdout, stderr) => {
+      if (err) {
+        reject(err);
+      } else {
+        resolve({stdout, stderr});
+      }
+    });
+  });
+}
+
+/**
+ * Get the repository owner from the repository string.
+ * @param {string} repository
+ * @return {string} The owner of the repository.
+ */
+function getRepositoryOwner(repository) {
+  return repository ? repository.split('/')[0] : null;
+}
+
+async function gitup(token) {
+  await sh(`git config --global user.name GitHub Action`)
+  await sh(`git config --global user.email github-action@users.noreply.github.com`)
+  await sh(`git config --global url."https://${token}:x-oauth-basic@github.com/".insteadOf "https://github.com/"`);
+}
+
+function envup() {
+  const owner = getRepositoryOwner(process.env.GITHUB_REPOSITORY);
+  core.exportVariable('GOPRIVATE', `github.com/${owner}/*`);
+}
+
+module.exports = {gitup, envup};