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-rw-r--r--src/cmd/go/internal/modload/stat_windows.go21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/cmd/go/internal/modload/stat_windows.go b/src/cmd/go/internal/modload/stat_windows.go
new file mode 100644
index 0000000..0ac2391
--- /dev/null
+++ b/src/cmd/go/internal/modload/stat_windows.go
@@ -0,0 +1,21 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build windows
+
+package modload
+
+import "io/fs"
+
+// hasWritePerm reports whether the current user has permission to write to the
+// file with the given info.
+func hasWritePerm(_ string, fi fs.FileInfo) bool {
+ // Windows has a read-only attribute independent of ACLs, so use that to
+ // determine whether the file is intended to be overwritten.
+ //
+ // Per https://golang.org/pkg/os/#Chmod:
+ // “On Windows, only the 0200 bit (owner writable) of mode is used; it
+ // controls whether the file's read-only attribute is set or cleared.”
+ return fi.Mode()&0200 != 0
+}