// checkSnap ensures that the snap can be installed.
func checkSnap(st *state.State, snapFilePath string, si *snap.SideInfo, curInfo *snap.Info, flags Flags) error {
// This assumes that the snap was already verified or --dangerous was used.
s, _, err := openSnapFile(snapFilePath, si)
if err != nil {
return err
}
if s.NeedsDevMode() && !flags.DevModeAllowed() {
return fmt.Errorf("snap %q requires devmode or confinement override", s.Name())
}
// verify we have a valid architecture
if !arch.IsSupportedArchitecture(s.Architectures) {
return fmt.Errorf("snap %q supported architectures (%s) are incompatible with this system (%s)", s.Name(), strings.Join(s.Architectures, ", "), arch.UbuntuArchitecture())
}
// check assumes
err = checkAssumes(s)
if err != nil {
return err
}
st.Lock()
defer st.Unlock()
for _, check := range checkSnapCallbacks {
err := check(st, s, curInfo, flags)
if err != nil {
return err
}
}
return nil
}
// checkSnap ensures that the snap can be installed.
func checkSnap(st *state.State, snapFilePath string, curInfo *snap.Info, flags Flags) error {
// This assumes that the snap was already verified or --dangerous was used.
s, _, err := openSnapFile(snapFilePath, nil)
if err != nil {
return err
}
if s.NeedsDevMode() && !flags.DevModeAllowed() {
return fmt.Errorf("snap %q requires devmode or confinement override", s.Name())
}
// verify we have a valid architecture
if !arch.IsSupportedArchitecture(s.Architectures) {
return fmt.Errorf("snap %q supported architectures (%s) are incompatible with this system (%s)", s.Name(), strings.Join(s.Architectures, ", "), arch.UbuntuArchitecture())
}
// check assumes
err = checkAssumes(s)
if err != nil {
return err
}
if s.Type != snap.TypeGadget {
return nil
}
// gadget specific checks
if release.OnClassic {
// for the time being
return fmt.Errorf("cannot install a gadget snap on classic")
}
st.Lock()
defer st.Unlock()
currentGadget, err := GadgetInfo(st)
// in firstboot we have no gadget yet - that is ok
if err == state.ErrNoState && !firstboot.HasRun() {
return nil
}
if err != nil {
return fmt.Errorf("cannot find original gadget snap")
}
// TODO: actually compare snap ids, from current gadget and candidate
if currentGadget.Name() != s.Name() {
return fmt.Errorf("cannot replace gadget snap with a different one")
}
return nil
}