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

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016-2017 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 configstate
    21  
    22  import (
    23  	"regexp"
    24  
    25  	"github.com/snapcore/snapd/overlord/configstate/config"
    26  	"github.com/snapcore/snapd/overlord/configstate/configcore"
    27  	"github.com/snapcore/snapd/overlord/hookstate"
    28  	"github.com/snapcore/snapd/overlord/state"
    29  )
    30  
    31  var configcoreRun = configcore.Run
    32  
    33  func MockConfigcoreRun(f func(config.Conf) error) (restore func()) {
    34  	origConfigcoreRun := configcoreRun
    35  	configcoreRun = f
    36  	return func() {
    37  		configcoreRun = origConfigcoreRun
    38  	}
    39  }
    40  
    41  func Init(st *state.State, hookManager *hookstate.HookManager) error {
    42  	delayedCrossMgrInit()
    43  
    44  	// Most configuration is handled via the "configure" hook of the
    45  	// snaps. However some configuration is internally handled
    46  	hookManager.Register(regexp.MustCompile("^configure$"), newConfigureHandler)
    47  	// Ensure that we run configure for the core snap internally.
    48  	// Note that we use the func() indirection so that mocking configcoreRun
    49  	// in tests works correctly.
    50  	hookManager.RegisterHijack("configure", "core", func(ctx *hookstate.Context) error {
    51  		ctx.Lock()
    52  		tr := ContextTransaction(ctx)
    53  		ctx.Unlock()
    54  		return configcoreRun(tr)
    55  	})
    56  
    57  	return nil
    58  }