Move syscall.Stats logic to os specific file.

related to #2909.

archive/changes.go

@@ -181,7 +181,7 @@ func (info *FileInfo) addChanges(oldInfo *FileInfo, changes *[]Change) {
 				oldStat.Rdev != newStat.Rdev ||
 				// Don't look at size for dirs, its not a good measure of change
 				(oldStat.Size != newStat.Size && oldStat.Mode&syscall.S_IFDIR != syscall.S_IFDIR) ||
-				oldStat.Mtim != newStat.Mtim {
+				getLastModification(oldStat) != getLastModification(newStat) {
 				change := Change{
 					Path: newChild.path(),
 					Kind: ChangeModify,

archive/diff.go

@@ -83,8 +83,10 @@ func ApplyLayer(dest string, layer Archive) error {
 	}
 
 	for k, v := range modifiedDirs {
-		aTime := time.Unix(v.Atim.Unix())
-		mTime := time.Unix(v.Mtim.Unix())
+		lastAccess := getLastAccess(v)
+		lastModification := getLastModification(v)
+		aTime := time.Unix(lastAccess.Unix())
+		mTime := time.Unix(lastModification.Unix())
 
 		if err := os.Chtimes(k, aTime, mTime); err != nil {
 			return err

archive/stat_darwin.go

@@ -0,0 +1,11 @@
+package archive
+
+import "syscall"
+
+func getLastAccess(stat *syscall.Stat_t) syscall.Timespec {
+	return stat.Atimespec
+}
+
+func getLastModification(stat *syscall.Stat_t) syscall.Timespec {
+	return stat.Mtimespec
+}

archive/stat_linux.go

@@ -0,0 +1,11 @@
+package archive
+
+import "syscall"
+
+func getLastAccess(stat *syscall.Stat_t) syscall.Timespec {
+	return stat.Atim
+}
+
+func getLastModification(stat *syscall.Stat_t) syscall.Timespec {
+	return stat.Mtim
+}