Update:Remove proper-lockfile dependency

server/libs/properLockfile/lib/mtime-precision.js

@@ -0,0 +1,55 @@
+'use strict';
+
+const cacheSymbol = Symbol();
+
+function probe(file, fs, callback) {
+    const cachedPrecision = fs[cacheSymbol];
+
+    if (cachedPrecision) {
+        return fs.stat(file, (err, stat) => {
+            /* istanbul ignore if */
+            if (err) {
+                return callback(err);
+            }
+
+            callback(null, stat.mtime, cachedPrecision);
+        });
+    }
+
+    // Set mtime by ceiling Date.now() to seconds + 5ms so that it's "not on the second"
+    const mtime = new Date((Math.ceil(Date.now() / 1000) * 1000) + 5);
+
+    fs.utimes(file, mtime, mtime, (err) => {
+        /* istanbul ignore if */
+        if (err) {
+            return callback(err);
+        }
+
+        fs.stat(file, (err, stat) => {
+            /* istanbul ignore if */
+            if (err) {
+                return callback(err);
+            }
+
+            const precision = stat.mtime.getTime() % 1000 === 0 ? 's' : 'ms';
+
+            // Cache the precision in a non-enumerable way
+            Object.defineProperty(fs, cacheSymbol, { value: precision });
+
+            callback(null, stat.mtime, precision);
+        });
+    });
+}
+
+function getMtime(precision) {
+    let now = Date.now();
+
+    if (precision === 's') {
+        now = Math.ceil(now / 1000) * 1000;
+    }
+
+    return new Date(now);
+}
+
+module.exports.probe = probe;
+module.exports.getMtime = getMtime;