bastion 0.53.2

client-go/deltacache_windows.go

@@ -0,0 +1,28 @@
+//go:build windows
+
+package main
+
+// The WEAK cache key on Windows, and it is named weak because it is.
+//
+// Go hands back a syscall.Win32FileAttributeData from FileInfo.Sys(): creation,
+// last-access and last-write times, plus the size. There is no file identity
+// (no volume serial + file index without opening a handle) and no change time,
+// so a file overwritten in place with its size, write time and creation time
+// restored keys identically to the original. deltaCacheWeakTTL is what covers
+// that, and `false` here is what turns it on.
+
+import (
+	"os"
+	"strconv"
+	"syscall"
+)
+
+func statIdentity(fi os.FileInfo) (string, bool) {
+	d, ok := fi.Sys().(*syscall.Win32FileAttributeData)
+	if !ok {
+		return "", false
+	}
+	return strconv.FormatInt(fi.Size(), 10) + ":" +
+		strconv.FormatInt(d.LastWriteTime.Nanoseconds(), 10) + ":" +
+		strconv.FormatInt(d.CreationTime.Nanoseconds(), 10), false
+}