fix: fix wrong time stamps on nodejs v12.10.0+

.travis.yml

@@ -8,4 +8,5 @@ node_js:
   - "6"
   - "8"
   - "10"
+  - "12.9" # 12.10 introduced a breaking change on fs stat internal storage.
   - "12"

lib/binding.js

@@ -17,13 +17,17 @@ const fsBinding = process.binding('fs');
 const kUsePromises = fsBinding.kUsePromises;
 let statValues;
 if (fsBinding.statValues) {
-  statValues = fsBinding.statValues; // node 10
+  statValues = fsBinding.statValues; // node 10+
 } else if (fsBinding.getStatValues) {
   statValues = fsBinding.getStatValues(); // node 8
 } else {
   statValues = [];
 }
 
+// nodejs v6,8,10 and v12 before v12.10.0 has length 28
+// nodejs v12.10.0+ has length 36
+const statContainsNs = statValues.length > 28;
+
 /** Introduction of BigUint64Array in 10.5 */
 let BigUint64Array;
 if (global.BigUint64Array) {
@@ -378,10 +382,28 @@ function fillStatsArray(stats, statValues) {
   statValues[7] = stats.ino;
   statValues[8] = stats.size;
   statValues[9] = stats.blocks;
-  statValues[10] = +stats.atime;
-  statValues[11] = +stats.mtime;
-  statValues[12] = +stats.ctime;
-  statValues[13] = +stats.birthtime;
+
+  if (statContainsNs) {
+    // nodejs v12.10.0+
+    // This is based on the internal FillStatsArray function in Node.
+    // https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/src/node_file.h#L153-L187
+    statValues[10] = Math.floor(stats.atimeMs / 1000);
+    statValues[11] = (stats.atimeMs % 1000) * 1000000;
+    statValues[12] = Math.floor(stats.mtimeMs / 1000);
+    statValues[13] = (stats.mtimeMs % 1000) * 1000000;
+    statValues[14] = Math.floor(stats.ctimeMs / 1000);
+    statValues[15] = (stats.ctimeMs % 1000) * 1000000;
+    statValues[16] = Math.floor(stats.birthtimeMs / 1000);
+    statValues[17] = (stats.birthtimeMs % 1000) * 1000000;
+  } else {
+    // nodejs before v12.10.0
+    // This is based on the internal FillStatsArray function in Node.
+    // https://github.com/nodejs/node/blob/4e05952a8a75af6df625415db612d3a9a1322682/src/node_file.cc#L533
+    statValues[10] = stats.atimeMs;
+    statValues[11] = stats.mtimeMs;
+    statValues[12] = stats.ctimeMs;
+    statValues[13] = stats.birthtimeMs;
+  }
 }
 
 /**

lib/item.js

@@ -282,7 +282,11 @@ Item.prototype.getStats = function() {
     atime: this.getATime(),
     mtime: this.getMTime(),
     ctime: this.getCTime(),
-    birthtime: this.getBirthtime()
+    birthtime: this.getBirthtime(),
+    atimeMs: +this.getATime(),
+    mtimeMs: +this.getMTime(),
+    ctimeMs: +this.getCTime(),
+    birthtimeMs: +this.getBirthtime()
   };
 };