VENDOR intensifies

vendor/github.com/ncw/rclone/fs/driveletter/driveletter.go

@@ -0,0 +1,14 @@
+// Package driveletter returns whether a name is a valid drive letter
+
+// +build !windows
+
+package driveletter
+
+// IsDriveLetter returns a bool indicating whether name is a valid
+// Windows drive letter
+//
+// On non windows platforms we don't have drive letters so we always
+// return false
+func IsDriveLetter(name string) bool {
+	return false
+}

vendor/github.com/ncw/rclone/fs/driveletter/driveletter_windows.go

@@ -0,0 +1,13 @@
+// +build windows
+
+package driveletter
+
+// IsDriveLetter returns a bool indicating whether name is a valid
+// Windows drive letter
+func IsDriveLetter(name string) bool {
+	if len(name) != 1 {
+		return false
+	}
+	c := name[0]
+	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
+}