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同步操作将从 tupelo-shen/mysnapd 强制同步,此操作会覆盖自 Fork 仓库以来所做的任何修改,且无法恢复!!!
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2019 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 policy
import (
"gitee.com/mysnapcore/mysnapd/overlord/snapstate"
"gitee.com/mysnapcore/mysnapd/overlord/state"
"gitee.com/mysnapcore/mysnapd/snap"
)
type snapdPolicy struct {
onClassic bool
}
func (p *snapdPolicy) CanRemove(st *state.State, snapst *snapstate.SnapState, rev snap.Revision, dev snap.Device) error {
name := snapst.InstanceName()
if name == "" {
// not installed, or something. What are you even trying to do.
return errNoName
}
if ephemeral(dev) {
return errEphemeralSnapsNotRemovalable
}
if !rev.Unset() {
return nil
}
// snapd cannot be removed on core
if !p.onClassic {
return errSnapdNotRemovableOnCore
}
// only allow snapd removal if its the last snap on a (classic) system
numSnaps, err := snapstate.NumSnaps(st)
if err != nil {
return err
}
if numSnaps > 1 {
return errSnapdNotYetRemovableOnClassic
}
return nil
}
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