Add message to inform user config will be overriden

index.js

@@ -12,6 +12,7 @@ const { getMergeRequests } = require('./lib/getMergeRequests');
 const { printMergeRequest } = require('./lib/printMergeRequest');
 const { writeConfig } = require('./lib/writeConfig');
 const { readConfig } = require('./lib/readConfig');
+const { checkConfigExists } = require('./lib/checkConfigExists');
 
 const UNAUTHORIZED_MESSAGE = '401 Unauthorized';
 
@@ -95,6 +96,11 @@ const verify = async ({ userId }) => {
 }
 
 const configure = async () => {
+
+  if(await checkConfigExists()){
+    console.log(chalk.red.bold('Mergify is already configured. Configuring again will override the existing file.'));
+  }
+
   try {
     const answers = await inquirer.prompt([
       {
@@ -172,4 +178,4 @@ const run = async() => {
   return program
 };
 
-run().then(p => p.parse(process.argv));
+run().then(p => p.parse(process.argv));

lib/checkConfigExists/index.js

@@ -0,0 +1,18 @@
+const { access, constants } = require('fs');
+const { promisify } = require('util');
+const accessAsync = promisify(access);
+
+async function checkConfigExists() {
+    try {
+        const configFileName = `${__dirname}/../../.config`;
+        await accessAsync(configFileName, constants.F_OK);
+        return true;
+    }
+    catch(_){
+        return false;
+    }
+}
+
+module.exports = {
+    checkConfigExists
+};