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hookstate.go
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hookstate.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Package hookstate implements the manager and state aspects responsible for
// the running of hooks.
package hookstate
import (
"github.com/snapcore/snapd/overlord/state"
)
// HookTaskWithUndo returns a task that will run the specified hook. On error the undo hook will be executed.
// Note that the initial context must properly marshal and unmarshal with encoding/json.
func HookTaskWithUndo(st *state.State, summary string, setup *HookSetup, undo *HookSetup, contextData map[string]interface{}) *state.Task {
task := st.NewTask("run-hook", summary)
task.Set("hook-setup", setup)
if undo != nil {
task.Set("undo-hook-setup", undo)
}
// Initial data for Context.Get/Set.
if len(contextData) > 0 {
task.Set("hook-context", contextData)
}
return task
}
// HookTask returns a task that will run the specified hook. Note that the
// initial context must properly marshal and unmarshal with encoding/json.
func HookTask(st *state.State, summary string, setup *HookSetup, contextData map[string]interface{}) *state.Task {
return HookTaskWithUndo(st, summary, setup, nil, contextData)
}