safety

tools/buildmark.js

@@ -0,0 +1,11 @@
+var fs = require('fs');
+var markfile = '.buildmark';
+var resolve = process.argv.indexOf('resolve') > -1;
+
+if (!resolve) {
+  fs.writeFileSync(markfile, Date.now());
+} else {
+  let mark = parseInt(fs.readFileSync(markfile).toString());
+  console.log(`Build ran in ${(Date.now() - mark)/1000} seconds.`);
+  fs.unlinkSync(markfile);
+}