github.com/david-imola/snapd@v0.0.0-20210611180407-2de8ddeece6d/overlord/patch/patch3.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016 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 patch
    21  
    22  import (
    23  	"github.com/snapcore/snapd/i18n"
    24  	"github.com/snapcore/snapd/overlord/state"
    25  )
    26  
    27  func init() {
    28  	patches[3] = []PatchFunc{patch3}
    29  }
    30  
    31  // patch3:
    32  // - migrates pending tasks and add {start,stop}-snap-services tasks
    33  func patch3(s *state.State) error {
    34  
    35  	// migrate all pending tasks and insert "{start,stop}-snap-server"
    36  	for _, t := range s.Tasks() {
    37  		if t.Status().Ready() {
    38  			continue
    39  		}
    40  
    41  		if t.Kind() == "link-snap" {
    42  			startSnapServices := s.NewTask("start-snap-services", i18n.G("Start snap services"))
    43  			startSnapServices.Set("snap-setup-task", t.ID())
    44  			startSnapServices.WaitFor(t)
    45  
    46  			chg := t.Change()
    47  			chg.AddTask(startSnapServices)
    48  		}
    49  
    50  		if t.Kind() == "unlink-snap" || t.Kind() == "unlink-current-snap" {
    51  			stopSnapServices := s.NewTask("stop-snap-services", i18n.G("Stop snap services"))
    52  			stopSnapServices.Set("snap-setup-task", t.ID())
    53  			t.WaitFor(stopSnapServices)
    54  
    55  			chg := t.Change()
    56  			chg.AddTask(stopSnapServices)
    57  		}
    58  	}
    59  
    60  	return nil
    61  }