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api_snaps.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2015-2024 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 daemon
import (
"context"
"encoding/json"
"errors"
"fmt"
"mime"
"net/http"
"strings"
"time"
"github.com/snapcore/snapd/asserts/snapasserts"
"github.com/snapcore/snapd/client"
"github.com/snapcore/snapd/i18n"
"github.com/snapcore/snapd/logger"
"github.com/snapcore/snapd/overlord/assertstate"
"github.com/snapcore/snapd/overlord/auth"
"github.com/snapcore/snapd/overlord/servicestate"
"github.com/snapcore/snapd/overlord/snapstate"
"github.com/snapcore/snapd/overlord/state"
"github.com/snapcore/snapd/progress"
"github.com/snapcore/snapd/sandbox"
"github.com/snapcore/snapd/snap"
"github.com/snapcore/snapd/snap/channel"
"github.com/snapcore/snapd/strutil"
)
var (
// see daemon.go:canAccess for details how the access is controlled
snapCmd = &Command{
Path: "/v2/snaps/{name}",
GET: getSnapInfo,
POST: postSnap,
ReadAccess: interfaceOpenAccess{Interfaces: []string{"snap-interfaces-requests-control", "snap-refresh-observe"}},
WriteAccess: authenticatedAccess{Polkit: polkitActionManage},
}
snapsCmd = &Command{
Path: "/v2/snaps",
GET: getSnapsInfo,
POST: postSnaps,
ReadAccess: interfaceOpenAccess{Interfaces: []string{"snap-refresh-observe"}},
WriteAccess: authenticatedAccess{Polkit: polkitActionManage},
}
)
func getSnapInfo(c *Command, r *http.Request, user *auth.UserState) Response {
vars := muxVars(r)
name := vars["name"]
st := c.d.overlord.State()
about, err := localSnapInfo(st, name)
if err != nil {
if err == errNoSnap {
return SnapNotFound(name, err)
}
return InternalError("%v", err)
}
route := c.d.router.Get(c.Path)
if route == nil {
return InternalError("cannot find route for %q snap", name)
}
url, err := route.URL("name", name)
if err != nil {
return InternalError("cannot build URL for %q snap: %v", name, err)
}
sd := servicestate.NewStatusDecorator(progress.Null)
result := webify(mapLocal(about, sd), url.String())
return SyncResponse(result)
}
func webify(result *client.Snap, resource string) *client.Snap {
if result.Icon == "" || strings.HasPrefix(result.Icon, "http") {
return result
}
result.Icon = ""
route := appIconCmd.d.router.Get(appIconCmd.Path)
if route != nil {
url, err := route.URL("name", result.Name)
if err == nil {
result.Icon = url.String()
}
}
return result
}
func postSnap(c *Command, r *http.Request, user *auth.UserState) Response {
route := c.d.router.Get(stateChangeCmd.Path)
if route == nil {
return InternalError("cannot find route for change")
}
decoder := json.NewDecoder(r.Body)
var inst snapInstruction
if err := decoder.Decode(&inst); err != nil {
return BadRequest("cannot decode request body into snap instruction: %v", err)
}
st := c.d.overlord.State()
st.Lock()
defer st.Unlock()
if user != nil {
inst.userID = user.ID
}
vars := muxVars(r)
inst.Snaps = []string{vars["name"]}
if len(inst.CompsRaw) > 0 {
// must be a string slice for /v2/snaps/<snap>
if err := inst.setCompsFromRawList(); err != nil {
return BadRequest("%s", err)
}
}
if err := inst.validate(); err != nil {
return BadRequest("%s", err)
}
impl := inst.dispatch()
if impl == nil {
return BadRequest("unknown action %s", inst.Action)
}
res, err := impl(r.Context(), &inst, st)
if err != nil {
return inst.errToResponse(err)
}
chg := newChange(st, inst.Action+"-snap", res.Summary, res.Tasksets, res.Affected)
if len(res.Tasksets) == 0 {
chg.SetStatus(state.DoneStatus)
}
if inst.SystemRestartImmediate {
chg.Set("system-restart-immediate", true)
}
apiData := map[string]interface{}{}
if len(res.Affected) > 0 {
apiData["snap-names"] = res.Affected
}
if len(res.AffectedComponents) > 0 {
apiData["components"] = res.AffectedComponents
}
chg.Set("api-data", apiData)
ensureStateSoon(st)
return AsyncResponse(nil, chg.ID())
}
type snapRevisionOptions struct {
Channel string `json:"channel"`
Revision snap.Revision `json:"revision"`
CohortKey string `json:"cohort-key"`
LeaveCohort bool `json:"leave-cohort"`
}
func (ropt *snapRevisionOptions) validate() error {
if ropt.CohortKey != "" {
if ropt.LeaveCohort {
return fmt.Errorf("cannot specify both cohort-key and leave-cohort")
}
if !ropt.Revision.Unset() {
return fmt.Errorf("cannot specify both cohort-key and revision")
}
}
if ropt.Channel != "" {
_, err := channel.Parse(ropt.Channel, "-")
if err != nil {
return err
}
}
return nil
}
type snapInstruction struct {
progress.NullMeter
Action string `json:"action"`
Amend bool `json:"amend"`
snapRevisionOptions
CompsRaw json.RawMessage `json:"components"`
CompsForSnaps map[string][]string `json:"-"`
DevMode bool `json:"devmode"`
JailMode bool `json:"jailmode"`
Classic bool `json:"classic"`
IgnoreValidation bool `json:"ignore-validation"`
IgnoreRunning bool `json:"ignore-running"`
Unaliased bool `json:"unaliased"`
Prefer bool `json:"prefer"`
Purge bool `json:"purge,omitempty"`
Terminate bool `json:"terminate"`
SystemRestartImmediate bool `json:"system-restart-immediate"`
Transaction client.TransactionType `json:"transaction"`
Snaps []string `json:"snaps"`
Users []string `json:"users"`
SnapshotOptions map[string]*snap.SnapshotOptions `json:"snapshot-options"`
ValidationSets []string `json:"validation-sets"`
QuotaGroupName string `json:"quota-group"`
Time string `json:"time"`
HoldLevel string `json:"hold-level"`
// The fields below should not be unmarshalled into. Do not export them.
userID int
}
func (inst *snapInstruction) setCompsFromRawList() error {
compsList := []string{}
if err := json.Unmarshal(inst.CompsRaw, &compsList); err != nil {
return err
}
inst.CompsForSnaps = make(map[string][]string, len(compsList))
inst.CompsForSnaps[inst.Snaps[0]] = compsList
return nil
}
func (inst *snapInstruction) setCompsFromRawMap() error {
return json.Unmarshal(inst.CompsRaw, &inst.CompsForSnaps)
}
func (inst *snapInstruction) revnoOpts() *snapstate.RevisionOptions {
return &snapstate.RevisionOptions{
Channel: inst.Channel,
Revision: inst.Revision,
CohortKey: inst.CohortKey,
LeaveCohort: inst.LeaveCohort,
}
}
func (inst *snapInstruction) modeFlags() (snapstate.Flags, error) {
return modeFlags(inst.DevMode, inst.JailMode, inst.Classic)
}
func (inst *snapInstruction) installFlags() (snapstate.Flags, error) {
flags, err := inst.modeFlags()
if err != nil {
return snapstate.Flags{}, err
}
if inst.Unaliased {
flags.Unaliased = true
}
if inst.IgnoreRunning {
flags.IgnoreRunning = true
}
if inst.IgnoreValidation {
flags.IgnoreValidation = true
}
if inst.Prefer {
flags.Prefer = true
}
flags.QuotaGroupName = inst.QuotaGroupName
return flags, nil
}
func (inst *snapInstruction) holdLevel() snapstate.HoldLevel {
switch inst.HoldLevel {
case "auto-refresh":
return snapstate.HoldAutoRefresh
case "general":
return snapstate.HoldGeneral
default:
panic("not validated hold level")
}
}
// cleanSnapshotOptions cleans the snapshot options.
//
// With default marshalling, some permutations of valid JSON definitions of snapshot-options e.g.
// - `"snapshot-options": { "snap1": {} }`
// - `"snapshot-options": { "snap1": {exclude: []} }`
//
// results in a pointer to SnapshotOptions object with a nil or zero length exclusion list
// which in turn will be marshalled to JSON as `options: {}` when we rather want it omitted.
// The cleaning step ensures that we only populate map entries for snapshot options that contain
// usable content that we want to be marshalled downstream.
func (inst *snapInstruction) cleanSnapshotOptions() {
for name, options := range inst.SnapshotOptions {
if options.Unset() {
delete(inst.SnapshotOptions, name)
}
}
}
func (inst *snapInstruction) validateSnapshotOptions() error {
if inst.SnapshotOptions == nil {
return nil
}
if inst.Action != "snapshot" {
return fmt.Errorf("snapshot-options can only be specified for snapshot action")
}
for name, options := range inst.SnapshotOptions {
if !strutil.ListContains(inst.Snaps, name) {
return fmt.Errorf("cannot use snapshot-options for snap %q that is not listed in snaps", name)
}
if err := options.Validate(); err != nil {
return fmt.Errorf("invalid snapshot-options for snap %q: %v", name, err)
}
}
return nil
}
func (inst *snapInstruction) validate() error {
if inst.CohortKey != "" {
if inst.Action != "install" && inst.Action != "refresh" && inst.Action != "switch" {
return fmt.Errorf("cohort-key can only be specified for install, refresh, or switch")
}
}
if inst.LeaveCohort {
if inst.Action != "refresh" && inst.Action != "switch" {
return fmt.Errorf("leave-cohort can only be specified for refresh or switch")
}
}
if inst.Action == "install" {
for _, snapName := range inst.Snaps {
// FIXME: alternatively we could simply mutate *inst
// and s/ubuntu-core/core/ ?
if snapName == "ubuntu-core" {
return fmt.Errorf(`cannot install "ubuntu-core", please use "core" instead`)
}
}
}
switch inst.Transaction {
case "":
case client.TransactionPerSnap, client.TransactionAllSnaps:
if inst.Action != "install" && inst.Action != "refresh" {
return fmt.Errorf(`transaction type is unsupported for %q actions`, inst.Action)
}
default:
return fmt.Errorf("invalid value for transaction type: %s", inst.Transaction)
}
if inst.QuotaGroupName != "" && inst.Action != "install" {
return fmt.Errorf("quota-group can only be specified on install")
}
if inst.Action == "hold" {
if inst.Time == "" {
return errors.New("hold action requires a non-empty time value")
} else if inst.Time != "forever" {
if _, err := time.Parse(time.RFC3339, inst.Time); err != nil {
return fmt.Errorf(`hold action requires time to be "forever" or in RFC3339 format: %v`, err)
}
}
if inst.HoldLevel == "" {
return errors.New("hold action requires a non-empty hold-level value")
} else if !(inst.HoldLevel == "auto-refresh" || inst.HoldLevel == "general") {
return errors.New(`hold action requires hold-level to be either "auto-refresh" or "general"`)
}
}
if inst.Action != "hold" {
if inst.Time != "" {
return errors.New(`time can only be specified for the "hold" action`)
}
if inst.HoldLevel != "" {
return errors.New(`hold-level can only be specified for the "hold" action`)
}
}
if inst.Unaliased && inst.Prefer {
return errUnaliasedPreferConflict
}
if inst.Prefer && inst.Action != "install" {
return fmt.Errorf("the prefer flag can only be specified on install")
}
if inst.Terminate && inst.Action != "remove" {
return fmt.Errorf(`terminate can only be specified for the "remove" action`)
}
if inst.Terminate && !inst.Revision.Unset() {
return fmt.Errorf(`terminate can only be specified when revision is unset`)
}
if err := inst.validateSnapshotOptions(); err != nil {
return err
}
if inst.Action == "snapshot" {
inst.cleanSnapshotOptions()
}
if len(inst.CompsRaw) > 0 {
switch inst.Action {
case "remove", "install", "refresh":
default:
return fmt.Errorf("%q action is not supported for components", inst.Action)
}
}
return inst.snapRevisionOptions.validate()
}
type snapInstructionResult struct {
Summary string
Affected []string
AffectedComponents map[string][]string
Tasksets []*state.TaskSet
Result map[string]interface{}
}
var errDevJailModeConflict = errors.New("cannot use devmode and jailmode flags together")
var errClassicDevmodeConflict = errors.New("cannot use classic and devmode flags together")
var errUnaliasedPreferConflict = errors.New("cannot use unaliased and prefer flags together")
var errNoJailMode = errors.New("this system cannot honour the jailmode flag")
func modeFlags(devMode, jailMode, classic bool) (snapstate.Flags, error) {
flags := snapstate.Flags{}
devModeOS := sandbox.ForceDevMode()
switch {
case jailMode && devModeOS:
return flags, errNoJailMode
case jailMode && devMode:
return flags, errDevJailModeConflict
case devMode && classic:
return flags, errClassicDevmodeConflict
}
// NOTE: jailmode and classic are allowed together. In that setting,
// jailmode overrides classic and the app gets regular (non-classic)
// confinement.
flags.JailMode = jailMode
flags.Classic = classic
flags.DevMode = devMode
return flags, nil
}
func snapInstall(ctx context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
if len(inst.Snaps[0]) == 0 {
return nil, errors.New(i18n.G("cannot install snap with empty name"))
}
if inst.CohortKey == "" {
logger.Noticef("Installing snap %q revision %s", inst.Snaps[0], inst.Revision)
} else {
logger.Noticef("Installing snap %q from cohort %q", inst.Snaps[0], strutil.ElliptLeft(inst.CohortKey, 10))
}
installedSnaps, installedComponents, tss, err := installationTaskSets(ctx, st, inst)
if err != nil {
return nil, err
}
return &snapInstructionResult{
Summary: installRefreshMessage(inst.Snaps[0], inst),
Tasksets: tss,
Affected: installedSnaps,
AffectedComponents: installedComponents,
}, nil
}
func installRefreshMessage(snapName string, inst *snapInstruction) string {
var b strings.Builder
if inst.Action == "install" {
fmt.Fprintf(&b, i18n.G("Install %q snap"), snapName)
} else {
fmt.Fprintf(&b, i18n.G("Refresh %q snap"), snapName)
}
if inst.Channel != "stable" && inst.Channel != "" {
fmt.Fprintf(&b, i18n.G(" from %q channel"), inst.Channel)
}
if inst.CohortKey != "" {
fmt.Fprintf(&b, i18n.G(" from %q cohort"), strutil.ElliptLeft(inst.CohortKey, 10))
}
if comps := inst.CompsForSnaps[snapName]; len(comps) > 0 {
if len(comps) > 1 {
fmt.Fprintf(&b, i18n.G(" with components %s"), strutil.Quoted(comps))
} else {
fmt.Fprintf(&b, i18n.G(" with component %s"), strutil.Quoted(comps))
}
}
return b.String()
}
func multiInstallRefreshMessage(snaps []string, inst *snapInstruction) string {
if len(snaps) == 1 {
return installRefreshMessage(snaps[0], inst)
}
var b strings.Builder
if inst.Action == "install" {
fmt.Fprint(&b, i18n.G("Install snaps"))
} else {
fmt.Fprint(&b, i18n.G("Refresh snaps"))
}
for i, name := range snaps {
fmt.Fprintf(&b, " %q", name)
if comps := inst.CompsForSnaps[name]; len(comps) > 0 {
b.WriteString(" (")
if len(comps) > 1 {
fmt.Fprintf(&b, i18n.G("with components %s"), strutil.Quoted(comps))
} else {
fmt.Fprintf(&b, i18n.G("with component %s"), strutil.Quoted(comps))
}
b.WriteRune(')')
}
if i < len(snaps)-1 {
b.WriteRune(',')
}
}
return b.String()
}
func snapUpdate(ctx context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
// TODO: bail if revision is given (and != current?), *or* behave as with install --revision?
flags, err := inst.modeFlags()
if err != nil {
return nil, err
}
if inst.IgnoreValidation {
flags.IgnoreValidation = true
}
if inst.IgnoreRunning {
flags.IgnoreRunning = true
}
if inst.Amend {
flags.Amend = true
}
// we need refreshed snap-declarations to enforce refresh-control as best as we can
if err = assertstateRefreshSnapAssertions(st, inst.userID, nil); err != nil {
return nil, err
}
// TODO: once we completely move away from the old snapstate API, this
// backwards compatibility bit should be removed
if flags.Transaction == "" {
flags.Transaction = client.TransactionPerSnap
}
goal := snapstateStoreUpdateGoal(snapstate.StoreUpdate{
InstanceName: inst.Snaps[0],
RevOpts: *inst.revnoOpts(),
AdditionalComponents: inst.CompsForSnaps[inst.Snaps[0]],
})
ts, err := snapstateUpdateOne(ctx, st, goal, nil, snapstate.Options{
Flags: flags,
UserID: inst.userID,
})
if err != nil {
return nil, err
}
return &snapInstructionResult{
Summary: installRefreshMessage(inst.Snaps[0], inst),
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
AffectedComponents: inst.CompsForSnaps,
}, nil
}
func snapRemove(_ context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
if len(inst.CompsForSnaps) > 0 {
msg, allTaskSets, err := removeSnapComponents(inst, st)
if err != nil {
return nil, err
}
return &snapInstructionResult{
Summary: msg,
Tasksets: allTaskSets,
AffectedComponents: inst.CompsForSnaps,
}, nil
} else {
return removeSnap(inst, st)
}
}
func removeSnap(inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
flags := &snapstate.RemoveFlags{Purge: inst.Purge, Terminate: inst.Terminate}
ts, err := snapstateRemove(st, inst.Snaps[0], inst.Revision, flags)
if err != nil {
return nil, err
}
return &snapInstructionResult{
Summary: fmt.Sprintf(i18n.G("Remove %q snap"), inst.Snaps[0]),
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
}, nil
}
func removeSnapComponents(inst *snapInstruction, st *state.State) (msg string, allTaskSets []*state.TaskSet, err error) {
compsMsg := make([]string, 0, len(inst.CompsForSnaps))
for snap, comps := range inst.CompsForSnaps {
// We call from here only when we remove components, not the
// full snap, so we need to refresh the security profiles.
tss, err := snapstateRemoveComponents(st, snap, comps,
snapstate.RemoveComponentsOpts{RefreshProfile: true})
if err != nil {
return "", nil, err
}
allTaskSets = append(allTaskSets, tss...)
compsMsg = append(compsMsg, fmt.Sprintf(i18n.G("%v for %q snap"), comps, snap))
}
msg = fmt.Sprintf(i18n.G("Remove component(s) %s"), strings.Join(compsMsg, ", "))
return msg, allTaskSets, nil
}
func snapRevert(_ context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
var ts *state.TaskSet
flags, err := inst.modeFlags()
if err != nil {
return nil, err
}
if inst.Revision.Unset() {
ts, err = snapstateRevert(st, inst.Snaps[0], flags, "")
} else {
ts, err = snapstateRevertToRevision(st, inst.Snaps[0], inst.Revision, flags, "")
}
if err != nil {
return nil, err
}
msg := fmt.Sprintf(i18n.G("Revert %q snap"), inst.Snaps[0])
return &snapInstructionResult{
Summary: msg,
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
}, nil
}
func snapEnable(_ context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
if !inst.Revision.Unset() {
return nil, errors.New("enable takes no revision")
}
ts, err := snapstate.Enable(st, inst.Snaps[0])
if err != nil {
return nil, err
}
msg := fmt.Sprintf(i18n.G("Enable %q snap"), inst.Snaps[0])
return &snapInstructionResult{
Summary: msg,
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
}, nil
}
func snapDisable(_ context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
if !inst.Revision.Unset() {
return nil, errors.New("disable takes no revision")
}
ts, err := snapstate.Disable(st, inst.Snaps[0])
if err != nil {
return nil, err
}
msg := fmt.Sprintf(i18n.G("Disable %q snap"), inst.Snaps[0])
return &snapInstructionResult{
Summary: msg,
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
}, nil
}
func snapSwitch(_ context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
if !inst.Revision.Unset() {
return nil, errors.New("switch takes no revision")
}
ts, err := snapstateSwitch(st, inst.Snaps[0], inst.revnoOpts())
if err != nil {
return nil, err
}
var msg string
switch {
case inst.LeaveCohort && inst.Channel != "":
msg = fmt.Sprintf(i18n.G("Switch %q snap to channel %q and away from cohort"), inst.Snaps[0], inst.Channel)
case inst.LeaveCohort:
msg = fmt.Sprintf(i18n.G("Switch %q snap away from cohort"), inst.Snaps[0])
case inst.CohortKey == "" && inst.Channel != "":
msg = fmt.Sprintf(i18n.G("Switch %q snap to channel %q"), inst.Snaps[0], inst.Channel)
case inst.CohortKey != "" && inst.Channel == "":
msg = fmt.Sprintf(i18n.G("Switch %q snap to cohort %q"), inst.Snaps[0], strutil.ElliptLeft(inst.CohortKey, 10))
default:
msg = fmt.Sprintf(i18n.G("Switch %q snap to channel %q and cohort %q"), inst.Snaps[0], inst.Channel, strutil.ElliptLeft(inst.CohortKey, 10))
}
return &snapInstructionResult{
Summary: msg,
Tasksets: []*state.TaskSet{ts},
Affected: inst.Snaps,
}, nil
}
type snapActionFunc func(context.Context, *snapInstruction, *state.State) (*snapInstructionResult, error)
var snapInstructionDispTable = map[string]snapActionFunc{
"install": snapInstall,
"refresh": snapUpdate,
"remove": snapRemove,
"revert": snapRevert,
"enable": snapEnable,
"disable": snapDisable,
"switch": snapSwitch,
"hold": snapHoldMany,
"unhold": snapUnholdMany,
}
func (inst *snapInstruction) dispatch() snapActionFunc {
if len(inst.Snaps) != 1 {
logger.Panicf("dispatch only handles single-snap ops; got %d", len(inst.Snaps))
}
return snapInstructionDispTable[inst.Action]
}
func (inst *snapInstruction) errToResponse(err error) *apiError {
if len(inst.Snaps) == 0 {
return errToResponse(err, nil, BadRequest, "cannot %s: %v", inst.Action)
}
return errToResponse(err, inst.Snaps, BadRequest, "cannot %s %s: %v", inst.Action, strutil.Quoted(inst.Snaps))
}
func postSnaps(c *Command, r *http.Request, user *auth.UserState) Response {
contentType := r.Header.Get("Content-Type")
mediaType, params, err := mime.ParseMediaType(contentType)
if err != nil {
return BadRequest("cannot parse content type: %v", err)
}
if mediaType == "application/json" {
charset := strings.ToUpper(params["charset"])
if charset != "" && charset != "UTF-8" {
return BadRequest("unknown charset in content type: %s", contentType)
}
return snapOpMany(c, r, user)
}
if !strings.HasPrefix(contentType, "multipart/") {
return BadRequest("unknown content type: %s", contentType)
}
return sideloadOrTrySnap(r.Context(), c, r.Body, params["boundary"], user)
}
func snapOpMany(c *Command, r *http.Request, user *auth.UserState) Response {
route := c.d.router.Get(stateChangeCmd.Path)
if route == nil {
return InternalError("cannot find route for change")
}
decoder := json.NewDecoder(r.Body)
var inst snapInstruction
if err := decoder.Decode(&inst); err != nil {
return BadRequest("cannot decode request body into snap instruction: %v", err)
}
// TODO: inst.Amend, etc?
if inst.Channel != "" || !inst.Revision.Unset() || inst.DevMode || inst.JailMode || inst.CohortKey != "" || inst.LeaveCohort || inst.Prefer {
return BadRequest("unsupported option provided for multi-snap operation")
}
if len(inst.CompsRaw) > 0 {
// must be a map of snaps to components for /v2/snaps
if err := inst.setCompsFromRawMap(); err != nil {
return BadRequest("%s", err)
}
}
if err := inst.validate(); err != nil {
return BadRequest("%v", err)
}
st := c.d.overlord.State()
st.Lock()
defer st.Unlock()
if user != nil {
inst.userID = user.ID
}
op := inst.dispatchForMany()
if op == nil {
return BadRequest("unsupported multi-snap operation %q", inst.Action)
}
res, err := op(r.Context(), &inst, st)
if err != nil {
return inst.errToResponse(err)
}
chg := newChange(st, inst.Action+"-snap", res.Summary, res.Tasksets, res.Affected)
if len(res.Tasksets) == 0 {
chg.SetStatus(state.DoneStatus)
}
if inst.SystemRestartImmediate {
chg.Set("system-restart-immediate", true)
}
apiData := map[string]interface{}{}
if len(res.Affected) > 0 {
apiData["snap-names"] = res.Affected
}
if len(res.AffectedComponents) > 0 {
apiData["components"] = res.AffectedComponents
}
chg.Set("api-data", apiData)
ensureStateSoon(st)
return AsyncResponse(res.Result, chg.ID())
}
type snapManyActionFunc func(context.Context, *snapInstruction, *state.State) (*snapInstructionResult, error)
func (inst *snapInstruction) dispatchForMany() (op snapManyActionFunc) {
switch inst.Action {
case "refresh":
if len(inst.ValidationSets) > 0 {
op = snapEnforceValidationSets
} else {
op = snapUpdateMany
}
case "install":
op = snapInstallMany
case "remove":
op = snapRemoveMany
case "snapshot":
// see api_snapshots.go
op = snapshotMany
case "hold":
op = snapHoldMany
case "unhold":
op = snapUnholdMany
}
return op
}
func installationTaskSets(ctx context.Context, st *state.State, inst *snapInstruction) ([]string, map[string][]string, []*state.TaskSet, error) {
expectOneSnap := len(inst.Snaps) == 1
opts := snapstate.Options{
UserID: inst.userID,
ExpectOneSnap: expectOneSnap,
}
if expectOneSnap {
flags, err := inst.installFlags()
if err != nil {
return nil, nil, nil, err
}
opts.Flags = flags
} else {
opts.Flags.Transaction = inst.Transaction
}
revOpts := snapstate.RevisionOptions{}
if expectOneSnap {
revOpts = *inst.revnoOpts()
}
installedSnaps := make([]string, 0)
installedComponents := make(map[string][]string)
var (
tss []*state.TaskSet
snaps []snapstate.StoreSnap
)
for _, name := range inst.Snaps {
var snapst snapstate.SnapState
if err := snapstate.Get(st, name, &snapst); err != nil && !errors.Is(err, state.ErrNoState) {
return nil, nil, nil, err
}
comps := inst.CompsForSnaps[name]
installedComponents[name] = append(installedComponents[name], comps...)
if snapst.IsInstalled() && len(comps) > 0 {
info, err := snapst.CurrentInfo()
if err != nil {
return nil, nil, nil, err
}
ts, err := snapstateInstallComponents(ctx, st, comps, info, nil, opts)
if err != nil {
return nil, nil, nil, err
}
tss = append(tss, ts...)
continue
}
installedSnaps = append(installedSnaps, name)
snaps = append(snaps, snapstate.StoreSnap{
InstanceName: name,
Components: comps,
RevOpts: revOpts,
})
}
// this means that we're installing a set of components for one snap that is
// already installed
if len(snaps) == 0 {
return installedSnaps, installedComponents, tss, nil
}
_, ts, err := snapstateInstallWithGoal(ctx, st, snapstateStoreInstallGoal(snaps...), opts)
if err != nil {
return nil, nil, nil, err
}
tss = append(tss, ts...)
return installedSnaps, installedComponents, tss, nil
}
func snapInstallMany(ctx context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
for _, name := range inst.Snaps {
if len(name) == 0 {
return nil, errors.New(i18n.G("cannot install snap with empty name"))
}
}
if len(inst.Snaps) == 0 {
return nil, errors.New(i18n.G("cannot install zero snaps"))
}
installedSnaps, installedComponents, tasksets, err := installationTaskSets(ctx, st, inst)
if err != nil {
return nil, err
}
return &snapInstructionResult{
Summary: multiInstallRefreshMessage(inst.Snaps, inst),
Affected: installedSnaps,
AffectedComponents: installedComponents,
Tasksets: tasksets,
}, nil
}
func snapUpdateMany(ctx context.Context, inst *snapInstruction, st *state.State) (*snapInstructionResult, error) {
// we need refreshed snap-declarations to enforce refresh-control as best as
// we can, this also ensures that snap-declarations and their prerequisite
// assertions are updated regularly; update validation sets assertions only
// if refreshing all snaps (no snap names explicitly requested).
opts := &assertstate.RefreshAssertionsOptions{
IsRefreshOfAllSnaps: len(inst.Snaps) == 0,
}
if err := assertstateRefreshSnapAssertions(st, inst.userID, opts); err != nil {
return nil, err
}
updates := make([]snapstate.StoreUpdate, 0, len(inst.Snaps))
for _, name := range inst.Snaps {
updates = append(updates, snapstate.StoreUpdate{
InstanceName: name,
AdditionalComponents: inst.CompsForSnaps[name],
})
}
flags := snapstate.Flags{
IgnoreRunning: inst.IgnoreRunning,
Transaction: inst.Transaction,
}