github.com/rigado/snapd@v2.42.5-go-mod+incompatible/overlord/configstate/configcore/snapshots.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2019 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package configcore
    21  
    22  import (
    23  	"fmt"
    24  	"time"
    25  
    26  	"github.com/snapcore/snapd/overlord/configstate/config"
    27  )
    28  
    29  func init() {
    30  	// add supported configuration of this module
    31  	supportedConfigurations["core.snapshots.automatic.retention"] = true
    32  }
    33  
    34  func validateAutomaticSnapshotsExpiration(tr config.Conf) error {
    35  	expirationStr, err := coreCfg(tr, "snapshots.automatic.retention")
    36  	if err != nil {
    37  		return err
    38  	}
    39  	if expirationStr != "" && expirationStr != "no" {
    40  		dur, err := time.ParseDuration(expirationStr)
    41  		if err != nil {
    42  			return fmt.Errorf("snapshots.automatic.retention cannot be parsed: %v", err)
    43  		}
    44  		if dur < time.Hour*24 {
    45  			return fmt.Errorf("snapshots.automatic.retention must be a value greater than 24 hours, or \"no\" to disable")
    46  		}
    47  	}
    48  	return nil
    49  }