github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/overlord/snapstate/backend.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016-2018 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 snapstate
    21  
    22  import (
    23  	"context"
    24  	"io"
    25  
    26  	"github.com/snapcore/snapd/asserts"
    27  	"github.com/snapcore/snapd/boot"
    28  	"github.com/snapcore/snapd/client"
    29  	"github.com/snapcore/snapd/overlord/auth"
    30  	"github.com/snapcore/snapd/overlord/snapstate/backend"
    31  	"github.com/snapcore/snapd/progress"
    32  	"github.com/snapcore/snapd/snap"
    33  	"github.com/snapcore/snapd/store"
    34  	"github.com/snapcore/snapd/timings"
    35  )
    36  
    37  // A StoreService can find, list available updates and download snaps.
    38  type StoreService interface {
    39  	EnsureDeviceSession() (*auth.DeviceState, error)
    40  
    41  	SnapInfo(ctx context.Context, spec store.SnapSpec, user *auth.UserState) (*snap.Info, error)
    42  	Find(ctx context.Context, search *store.Search, user *auth.UserState) ([]*snap.Info, error)
    43  
    44  	SnapAction(ctx context.Context, currentSnaps []*store.CurrentSnap, actions []*store.SnapAction, assertQuery store.AssertionQuery, user *auth.UserState, opts *store.RefreshOptions) ([]store.SnapActionResult, []store.AssertionResult, error)
    45  
    46  	Sections(ctx context.Context, user *auth.UserState) ([]string, error)
    47  	WriteCatalogs(ctx context.Context, names io.Writer, adder store.SnapAdder) error
    48  
    49  	Download(context.Context, string, string, *snap.DownloadInfo, progress.Meter, *auth.UserState, *store.DownloadOptions) error
    50  	DownloadStream(context.Context, string, *snap.DownloadInfo, int64, *auth.UserState) (r io.ReadCloser, status int, err error)
    51  
    52  	Assertion(assertType *asserts.AssertionType, primaryKey []string, user *auth.UserState) (asserts.Assertion, error)
    53  	DownloadAssertions([]string, *asserts.Batch, *auth.UserState) error
    54  
    55  	SuggestedCurrency() string
    56  	Buy(options *client.BuyOptions, user *auth.UserState) (*client.BuyResult, error)
    57  	ReadyToBuy(*auth.UserState) error
    58  	ConnectivityCheck() (map[string]bool, error)
    59  	CreateCohorts(context.Context, []string) (map[string]string, error)
    60  
    61  	LoginUser(username, password, otp string) (string, string, error)
    62  	UserInfo(email string) (userinfo *store.User, err error)
    63  }
    64  
    65  type managerBackend interface {
    66  	// install related
    67  	SetupSnap(snapFilePath, instanceName string, si *snap.SideInfo, dev boot.Device, meter progress.Meter) (snap.Type, *backend.InstallRecord, error)
    68  	CopySnapData(newSnap, oldSnap *snap.Info, meter progress.Meter) error
    69  	LinkSnap(info *snap.Info, dev boot.Device, linkCtx backend.LinkContext, tm timings.Measurer) (rebootRequired bool, err error)
    70  	StartServices(svcs []*snap.AppInfo, meter progress.Meter, tm timings.Measurer) error
    71  	StopServices(svcs []*snap.AppInfo, reason snap.ServiceStopReason, meter progress.Meter, tm timings.Measurer) error
    72  	ServicesEnableState(info *snap.Info, meter progress.Meter) (map[string]bool, error)
    73  	QueryDisabledServices(info *snap.Info, pb progress.Meter) ([]string, error)
    74  
    75  	// the undoers for install
    76  	UndoSetupSnap(s snap.PlaceInfo, typ snap.Type, installRecord *backend.InstallRecord, dev boot.Device, meter progress.Meter) error
    77  	UndoCopySnapData(newSnap, oldSnap *snap.Info, meter progress.Meter) error
    78  	// cleanup
    79  	ClearTrashedData(oldSnap *snap.Info)
    80  
    81  	// remove related
    82  	UnlinkSnap(info *snap.Info, linkCtx backend.LinkContext, meter progress.Meter) error
    83  	RemoveSnapFiles(s snap.PlaceInfo, typ snap.Type, installRecord *backend.InstallRecord, dev boot.Device, meter progress.Meter) error
    84  	RemoveSnapDir(s snap.PlaceInfo, hasOtherInstances bool) error
    85  	RemoveSnapData(info *snap.Info) error
    86  	RemoveSnapCommonData(info *snap.Info) error
    87  	RemoveSnapDataDir(info *snap.Info, hasOtherInstances bool) error
    88  	DiscardSnapNamespace(snapName string) error
    89  
    90  	// alias related
    91  	UpdateAliases(add []*backend.Alias, remove []*backend.Alias) error
    92  	RemoveSnapAliases(snapName string) error
    93  
    94  	// testing helpers
    95  	CurrentInfo(cur *snap.Info)
    96  	Candidate(sideInfo *snap.SideInfo)
    97  }