Switch to github.com/adrg/xdg

vendor/github.com/adrg/xdg/internal/pathutil/pathutil_unix.go

@@ -0,0 +1,32 @@
+//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || nacl || linux || netbsd || openbsd || solaris
+// +build aix darwin dragonfly freebsd js,wasm nacl linux netbsd openbsd solaris
+
+package pathutil
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// Exists returns true if the specified path exists.
+func Exists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil || os.IsExist(err)
+}
+
+// ExpandHome substitutes `~` and `$HOME` at the start of the specified
+// `path` using the provided `home` location.
+func ExpandHome(path, home string) string {
+	if path == "" || home == "" {
+		return path
+	}
+	if path[0] == '~' {
+		return filepath.Join(home, path[1:])
+	}
+	if strings.HasPrefix(path, "$HOME") {
+		return filepath.Join(home, path[5:])
+	}
+
+	return path
+}