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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 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 builtin
import (
"fmt"
"sort"
"github.com/snapcore/snapd/interfaces"
"github.com/snapcore/snapd/snap"
)
func init() {
snap.SanitizePlugsSlots = SanitizePlugsSlots
// setup the ByName function using allInterfaces
interfaces.ByName = func(name string) (interfaces.Interface, error) {
iface, ok := allInterfaces[name]
if !ok {
return nil, fmt.Errorf("interface %q not found", name)
}
return iface, nil
}
}
var (
allInterfaces map[string]interfaces.Interface
)
// Interfaces returns all of the built-in interfaces.
func Interfaces() []interfaces.Interface {
ifaces := make([]interfaces.Interface, 0, len(allInterfaces))
for _, iface := range allInterfaces {
ifaces = append(ifaces, iface)
}
sort.Sort(byIfaceName(ifaces))
return ifaces
}
// registerIface appends the given interface into the list of all known interfaces.
func registerIface(iface interfaces.Interface) {
if allInterfaces[iface.Name()] != nil {
panic(fmt.Errorf("cannot register duplicate interface %q", iface.Name()))
}
if allInterfaces == nil {
allInterfaces = make(map[string]interfaces.Interface)
}
allInterfaces[iface.Name()] = iface
}
func SanitizePlugsSlots(snapInfo *snap.Info) {
var badPlugs []string
var badSlots []string
for plugName, plugInfo := range snapInfo.Plugs {
iface, ok := allInterfaces[plugInfo.Interface]
if !ok {
snapInfo.BadInterfaces[plugName] = fmt.Sprintf("unknown interface %q", plugInfo.Interface)
badPlugs = append(badPlugs, plugName)
continue
}
// Reject plug with invalid name
if err := snap.ValidatePlugName(plugName); err != nil {
snapInfo.BadInterfaces[plugName] = err.Error()
badPlugs = append(badPlugs, plugName)
continue
}
if err := interfaces.BeforePreparePlug(iface, plugInfo); err != nil {
snapInfo.BadInterfaces[plugName] = err.Error()
badPlugs = append(badPlugs, plugName)
continue
}
}
for slotName, slotInfo := range snapInfo.Slots {
iface, ok := allInterfaces[slotInfo.Interface]
if !ok {
snapInfo.BadInterfaces[slotName] = fmt.Sprintf("unknown interface %q", slotInfo.Interface)
badSlots = append(badSlots, slotName)
continue
}
// Reject slot with invalid name
if err := snap.ValidateSlotName(slotName); err != nil {
snapInfo.BadInterfaces[slotName] = err.Error()
badSlots = append(badSlots, slotName)
continue
}
if err := interfaces.BeforePrepareSlot(iface, slotInfo); err != nil {
snapInfo.BadInterfaces[slotName] = err.Error()
badSlots = append(badSlots, slotName)
continue
}
}
// remove any bad plugs and slots
for _, plugName := range badPlugs {
delete(snapInfo.Plugs, plugName)
for _, app := range snapInfo.Apps {
delete(app.Plugs, plugName)
}
for _, hook := range snapInfo.Hooks {
delete(hook.Plugs, plugName)
}
for _, component := range snapInfo.Components {
for _, hook := range component.ExplicitHooks {
delete(hook.Plugs, plugName)
}
}
}
for _, slotName := range badSlots {
delete(snapInfo.Slots, slotName)
for _, app := range snapInfo.Apps {
delete(app.Slots, slotName)
var activatesOn []*snap.SlotInfo
for _, slot := range app.ActivatesOn {
if slot.Name != slotName {
activatesOn = append(activatesOn, slot)
}
}
app.ActivatesOn = activatesOn
}
for _, hook := range snapInfo.Hooks {
delete(hook.Slots, slotName)
}
// TODO: if component ever get slots, then we'll need to sanitize them
// here
}
}
func MockInterface(iface interfaces.Interface) func() {
name := iface.Name()
allInterfaces[name] = iface
return func() {
delete(allInterfaces, name)
}
}
type byIfaceName []interfaces.Interface
func (c byIfaceName) Len() int { return len(c) }
func (c byIfaceName) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
func (c byIfaceName) Less(i, j int) bool {
return c[i].Name() < c[j].Name()
}
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