use xdg config home instead of xdg runtime dir (#50)

Fixes #36

Author: binarycodes

go-ssh-keysign/internal/cli/helper.go

@@ -74,7 +74,7 @@ func ReadConfigFile(cmd *cobra.Command, v *viper.Viper) error {
 	} else {
 		switch cmd.Name() {
 		case "user":
-			if runtimeDir := os.Getenv("XDG_RUNTIME_DIR"); runtimeDir != "" {
+			if runtimeDir := os.Getenv("XDG_CONFIG_HOME"); runtimeDir != "" {
 				v.SetConfigFile(filepath.Join(runtimeDir, constants.AppName, constants.ConfigFileName))
 			} else if home, err := os.UserHomeDir(); err == nil && home != "" {
 				v.SetConfigFile(filepath.Join(home, ".config", constants.AppName, constants.ConfigFileName))

go-ssh-keysign/internal/cli/testutil/helper.go

@@ -87,6 +87,15 @@ func ExecuteCommand(t *testing.T, cmd *cobra.Command, args ...string) (stoutStr,
 		}
 	}()
 
+	tempPath, err := os.MkdirTemp(os.TempDir(), "*")
+	if err != nil {
+		t.Fatalf("error creating temporary config directory: %v", err)
+	}
+
+	if err := os.Setenv("XDG_CONFIG_HOME", tempPath); err != nil {
+		t.Fatalf("setenv: %v", err)
+	}
+
 	err = cmd.Execute()
 	logs = observed.All()
 	return stdout.String(), stderr.String(), logs, err