Fix

Author: frostebite

index.js

@@ -1,10 +1,12 @@
 const core = require('@actions/core');
 const base64 = require('file-base64');
 const path = require('path');
+const untildify = require('untildify');
+ 
 // most @actions toolkit packages have async methods
 async function run() {
   try { 
-    const filePath = core.getInput('filePath');
+    const filePath = untildify(core.getInput('filePath'));
     let promise = new Promise(function(resolve, reject) {
       base64.encode(path.normalize(filePath), function(err, base64String) {
         if(err){

package.json

@@ -25,7 +25,8 @@
   "homepage": "https://github.com/actions/javascript-action#readme",
   "dependencies": {
     "@actions/core": "^1.1.1",
-    "file-base64": "^1.0.0"
+    "file-base64": "^1.0.0",
+    "untildify": "^4.0.0"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.20.5",