Golang Info.Name方法代码示例

func mapLocal(localSnap *snap.Info, snapst *snapstate.SnapState) map[string]interface{} {
	status := "installed"
	if snapst.Active && localSnap.Revision == snapst.Current {
		status = "active"
	}

	apps := make([]appJSON, 0, len(localSnap.Apps))
	for _, app := range localSnap.Apps {
		apps = append(apps, appJSON{
			Name: app.Name,
		})
	}

	return map[string]interface{}{
		"description":    localSnap.Description(),
		"developer":      localSnap.Developer,
		"icon":           snapIcon(localSnap),
		"id":             localSnap.SnapID,
		"install-date":   snapDate(localSnap),
		"installed-size": localSnap.Size,
		"name":           localSnap.Name(),
		"revision":       localSnap.Revision,
		"status":         status,
		"summary":        localSnap.Summary(),
		"type":           string(localSnap.Type),
		"version":        localSnap.Version,
		"channel":        localSnap.Channel,
		"confinement":    localSnap.Confinement,
		"devmode":        snapst.DevMode(),
		"trymode":        snapst.TryMode(),
		"private":        localSnap.Private,
		"apps":           apps,
		"broken":         localSnap.Broken,
	}
}

// Setup creates a conf file with list of kernel modules required by given snap,
// writes it in /etc/modules-load.d/ directory and immediately loads the modules
// using /sbin/modprobe. The devMode is ignored.
//
// If the method fails it should be re-tried (with a sensible strategy) by the caller.
func (b *Backend) Setup(snapInfo *snap.Info, confinement interfaces.ConfinementOptions, repo *interfaces.Repository) error {
	snapName := snapInfo.Name()
	// Get the snippets that apply to this snap
	snippets, err := repo.SecuritySnippetsForSnap(snapInfo.Name(), interfaces.SecurityKMod)
	if err != nil {
		return fmt.Errorf("cannot obtain kmod security snippets for snap %q: %s", snapName, err)
	}

	// Get the files that this snap should have
	glob := interfaces.SecurityTagGlob(snapName)
	content, modules, err := b.combineSnippets(snapInfo, snippets)
	if err != nil {
		return fmt.Errorf("cannot obtain expected security files for snap %q: %s", snapName, err)
	}

	dir := dirs.SnapKModModulesDir
	if err := os.MkdirAll(dir, 0755); err != nil {
		return fmt.Errorf("cannot create directory for kmod files %q: %s", dir, err)
	}

	changed, _, err := osutil.EnsureDirState(dirs.SnapKModModulesDir, glob, content)
	if err != nil {
		return err
	}

	if len(changed) > 0 {
		return loadModules(modules)
	}
	return nil
}

// templateVariables returns text defining apparmor variables that can be used in the
// apparmor template and by apparmor snippets.
func templateVariables(info *snap.Info) []byte {
	var buf bytes.Buffer
	fmt.Fprintf(&buf, "@{SNAP_NAME}=\"%s\"\n", info.Name())
	fmt.Fprintf(&buf, "@{SNAP_REVISION}=\"%s\"\n", info.Revision)
	fmt.Fprintf(&buf, "@{INSTALL_DIR}=\"/snap\"")
	return buf.Bytes()
}

// CheckInterfaces checks whether plugs and slots of snap are allowed for installation.
func CheckInterfaces(st *state.State, snapInfo *snap.Info) error {
	// XXX: AddImplicitSlots is really a brittle interface
	snap.AddImplicitSlots(snapInfo)

	baseDecl, err := assertstate.BaseDeclaration(st)
	if err != nil {
		return fmt.Errorf("internal error: cannot find base declaration: %v", err)
	}

	var snapDecl *asserts.SnapDeclaration
	if snapInfo.SnapID != "" {
		var err error
		snapDecl, err = assertstate.SnapDeclaration(st, snapInfo.SnapID)
		if err != nil {
			return fmt.Errorf("cannot find snap declaration for %q: %v", snapInfo.Name(), err)
		}
	}

	ic := policy.InstallCandidate{
		Snap:            snapInfo,
		SnapDeclaration: snapDecl,
		BaseDeclaration: baseDecl,
	}

	return ic.Check()
}

// combineSnippets combines security snippets collected from all the interfaces
// affecting a given snap into a de-duplicated list of kernel modules.
func (b *Backend) combineSnippets(snapInfo *snap.Info, snippets map[string][][]byte) (content map[string]*osutil.FileState, modules []string, err error) {
	content = make(map[string]*osutil.FileState)

	for _, appInfo := range snapInfo.Apps {
		for _, snippet := range snippets[appInfo.SecurityTag()] {
			// split snippet by newline to get the list of modules
			for _, line := range bytes.Split(snippet, []byte{'\n'}) {
				l := bytes.TrimSpace(line)
				// ignore empty lines and comments
				if len(l) > 0 && l[0] != '#' {
					modules = append(modules, string(l))
				}
			}
		}
	}

	sort.Strings(modules)
	modules = uniqueLines(modules)
	if len(modules) > 0 {
		var buffer bytes.Buffer
		buffer.WriteString("# This file is automatically generated.\n")
		for _, module := range modules {
			buffer.WriteString(module)
			buffer.WriteByte('\n')
		}

		content[fmt.Sprintf("%s.conf", snap.SecurityTag(snapInfo.Name()))] = &osutil.FileState{
			Content: buffer.Bytes(),
			Mode:    0644,
		}
	}

	return content, modules, nil
}

func (f *fakeSnappyBackend) ClearTrashedData(si *snap.Info) {
	f.ops = append(f.ops, fakeOp{
		op:    "cleanup-trash",
		name:  si.Name(),
		revno: si.Revision,
	})
}

func (s *BackendSuite) removePlugsSlots(c *C, snapInfo *snap.Info) {
	for _, plug := range s.Repo.Plugs(snapInfo.Name()) {
		err := s.Repo.RemovePlug(plug.Snap.Name(), plug.Name)
		c.Assert(err, IsNil)
	}
	for _, slot := range s.Repo.Slots(snapInfo.Name()) {
		err := s.Repo.RemoveSlot(slot.Snap.Name(), slot.Name)
		c.Assert(err, IsNil)
	}
}

// AddSnap adds plugs and slots declared by the given snap to the repository.
//
// This function can be used to implement snap install or, when used along with
// RemoveSnap, snap upgrade.
//
// AddSnap doesn't change existing plugs/slots. The caller is responsible for
// ensuring that the snap is not present in the repository in any way prior to
// calling this function. If this constraint is violated then no changes are
// made and an error is returned.
//
// Each added plug/slot is validated according to the corresponding interface.
// Unknown interfaces and plugs/slots that don't validate are not added.
// Information about those failures are returned to the caller.
func (r *Repository) AddSnap(snapInfo *snap.Info) error {
	r.m.Lock()
	defer r.m.Unlock()

	snapName := snapInfo.Name()

	if r.plugs[snapName] != nil || r.slots[snapName] != nil {
		return fmt.Errorf("cannot register interfaces for snap %q more than once", snapName)
	}

	bad := BadInterfacesError{
		snap:   snapName,
		issues: make(map[string]string),
	}

	for plugName, plugInfo := range snapInfo.Plugs {
		iface, ok := r.ifaces[plugInfo.Interface]
		if !ok {
			bad.issues[plugName] = "unknown interface"
			continue
		}
		plug := &Plug{PlugInfo: plugInfo}
		if err := iface.SanitizePlug(plug); err != nil {
			bad.issues[plugName] = err.Error()
			continue
		}
		if r.plugs[snapName] == nil {
			r.plugs[snapName] = make(map[string]*Plug)
		}
		r.plugs[snapName][plugName] = plug
	}

	for slotName, slotInfo := range snapInfo.Slots {
		iface, ok := r.ifaces[slotInfo.Interface]
		if !ok {
			bad.issues[slotName] = "unknown interface"
			continue
		}
		slot := &Slot{SlotInfo: slotInfo}
		if err := iface.SanitizeSlot(slot); err != nil {
			bad.issues[slotName] = err.Error()
			continue
		}
		if r.slots[snapName] == nil {
			r.slots[snapName] = make(map[string]*Slot)
		}
		r.slots[snapName][slotName] = slot
	}

	if len(bad.issues) > 0 {
		return &bad
	}
	return nil
}

func (f *fakeStoreClient) Download(remoteSnap *snap.Info, pb progress.Meter, sa store.Authenticator) (path string, err error) {
	f.downloadCalls[getDownloadCall(remoteSnap.Name(), remoteSnap.Channel)]++
	f.totalDownloadCalls++

	if f.downloadErr {
		if f.totalDownloadCalls > f.correctDownloadCalls {
			return "", errors.New("")
		}
	}
	return getSnapFilename(remoteSnap.Name(), remoteSnap.Channel), nil
}

// UpdateSnap "updates" an existing snap from YAML.
func (s *BackendSuite) UpdateSnap(c *C, oldSnapInfo *snap.Info, devMode bool, snapYaml string, revision int) *snap.Info {
	newSnapInfo := snaptest.MockInfo(c, snapYaml, &snap.SideInfo{
		Revision:  snap.R(revision),
		Developer: "acme",
	})
	c.Assert(newSnapInfo.Name(), Equals, oldSnapInfo.Name())
	s.removePlugsSlots(c, oldSnapInfo)
	s.addPlugsSlots(c, newSnapInfo)
	err := s.Backend.Setup(newSnapInfo, devMode, s.Repo)
	c.Assert(err, IsNil)
	return newSnapInfo
}

// ClearTrashedData removes the trash. It returns no errors on the assumption that it is called very late in the game.
func (b Backend) ClearTrashedData(oldSnap *snap.Info) {
	dirs, err := snapDataDirs(oldSnap)
	if err != nil {
		logger.Noticef("Cannot remove previous data for %q: %v", oldSnap.Name(), err)
		return
	}

	for _, d := range dirs {
		if err := clearTrash(d); err != nil {
			logger.Noticef("Cannot remove %s: %v", d, err)
		}
	}
}

// basicEnv returns the app-level environment variables for a snap.
// Despite this being a bit snap-specific, this is in helpers.go because it's
// used by so many other modules, we run into circular dependencies if it's
// somewhere more reasonable like the snappy module.
func basicEnv(info *snap.Info) map[string]string {
	return map[string]string{
		"SNAP":              info.MountDir(),
		"SNAP_COMMON":       info.CommonDataDir(),
		"SNAP_DATA":         info.DataDir(),
		"SNAP_NAME":         info.Name(),
		"SNAP_VERSION":      info.Version,
		"SNAP_REVISION":     info.Revision.String(),
		"SNAP_ARCH":         arch.UbuntuArchitecture(),
		"SNAP_LIBRARY_PATH": "/var/lib/snapd/lib/gl:",
		"SNAP_REEXEC":       os.Getenv("SNAP_REEXEC"),
	}
}

// FetchAndCheckSnapAssertions fetches and cross checks the snap assertions matching the given snap file using the provided asserts.Fetcher and assertion database.
func FetchAndCheckSnapAssertions(snapPath string, info *snap.Info, f asserts.Fetcher, db asserts.RODatabase) error {
	sha3_384, size, err := asserts.SnapFileSHA3_384(snapPath)
	if err != nil {
		return err
	}

	if err := snapasserts.FetchSnapAssertions(f, sha3_384); err != nil {
		return fmt.Errorf("cannot fetch snap signatures/assertions: %v", err)
	}

	// cross checks
	return snapasserts.CrossCheck(info.Name(), sha3_384, size, &info.SideInfo, db)
}

func mapRemote(remoteSnap *snap.Info) map[string]interface{} {
	status := "available"
	if remoteSnap.MustBuy {
		status = "priced"
	}

	confinement := remoteSnap.Confinement
	if confinement == "" {
		confinement = snap.StrictConfinement
	}

	screenshots := make([]screenshotJSON, len(remoteSnap.Screenshots))
	for i, screenshot := range remoteSnap.Screenshots {
		screenshots[i] = screenshotJSON{
			URL:    screenshot.URL,
			Width:  screenshot.Width,
			Height: screenshot.Height,
		}
	}

	result := map[string]interface{}{
		"description":   remoteSnap.Description(),
		"developer":     remoteSnap.Developer,
		"download-size": remoteSnap.Size,
		"icon":          snapIcon(remoteSnap),
		"id":            remoteSnap.SnapID,
		"name":          remoteSnap.Name(),
		"revision":      remoteSnap.Revision,
		"status":        status,
		"summary":       remoteSnap.Summary(),
		"type":          string(remoteSnap.Type),
		"version":       remoteSnap.Version,
		"channel":       remoteSnap.Channel,
		"private":       remoteSnap.Private,
		"confinement":   confinement,
	}

	if len(screenshots) > 0 {
		result["screenshots"] = screenshots
	}

	if len(remoteSnap.Prices) > 0 {
		result["prices"] = remoteSnap.Prices
	}

	if len(remoteSnap.Channels) > 0 {
		result["channels"] = remoteSnap.Channels
	}

	return result
}

// combineSnippets combines security snippets collected from all the interfaces
// affecting a given snap into a content map applicable to EnsureDirState.
func (b *Backend) combineSnippets(snapInfo *snap.Info, snippets map[string][][]byte) (result [][]byte, err error) {
	var snapSnippets = make(map[string][]byte)

	// We put all snippets from apps and hooks in the following part in a
	// map to reach a deduplicated set of snippets we can then write out
	// in a per snap udev rules file.

	for _, appInfo := range snapInfo.Apps {
		securityTag := appInfo.SecurityTag()
		appSnippets := snippets[securityTag]
		if len(appSnippets) == 0 {
			continue
		}

		for _, snippet := range appSnippets {
			snapSnippets[string(snippet)] = snippet
		}
	}

	for _, hookInfo := range snapInfo.Hooks {
		securityTag := hookInfo.SecurityTag()
		hookSnippets := snippets[securityTag]
		if len(hookSnippets) == 0 {
			continue
		}

		for _, snippet := range hookSnippets {
			snapSnippets[string(snippet)] = snippet
		}
	}

	nonePrefix := snap.NoneSecurityTag(snapInfo.Name(), "")
	for securityTag, slotSnippets := range snippets {
		if !strings.HasPrefix(securityTag, nonePrefix) {
			continue
		}

		for _, snippet := range slotSnippets {
			snapSnippets[string(snippet)] = snippet
		}
	}

	var combinedSnippets [][]byte
	for _, snippet := range snapSnippets {
		combinedSnippets = append(combinedSnippets, snippet)
	}

	return combinedSnippets, nil
}