Save version on each build

package.json

@@ -9,7 +9,8 @@
     "test": "jest --verbose",
     "build": "parcel build index.js",
     "lint": "eslint . && prettier . --check",
-    "lint:fix": "eslint . --fix ; prettier . --write"
+    "lint:fix": "eslint . --fix ; prettier . --write",
+    "postbuild": "node postbuild.js"
   },
   "keywords": [],
   "author": "",

postbuild.js

@@ -0,0 +1,23 @@
+require('dotenv').config();
+const fs = require('fs');
+const { version } = require('os');
+const exec = require('child_process').exec;
+const latestCommit = null;
+
+exec('git log -n 1 --pretty=format:"%H"', (err, stdout, stderr) => {
+    // git rev-parse --verify HEAD
+    if (err) {
+        console.error(`error: ${err}`);
+        return;
+    }
+
+    if (stderr) {
+        console.error(`stderr: ${stderr}`);
+        return;
+    }
+    console.log(`stdout: ${stdout}`);
+    this.latestCommit = stdout;
+    var data = `var data = {"version": "${stdout}"};\nexport {data}`
+    fs.writeFileSync('dist/version.js', data);
+})
+