func removeCurrentSymlink(info snap.PlaceInfo, inter interacter) error {
var err1, err2 error
// the snap "current" symlink
currentActiveSymlink := filepath.Join(info.MountDir(), "..", "current")
err1 = os.Remove(currentActiveSymlink)
if err1 != nil && !os.IsNotExist(err1) {
logger.Noticef("Failed to remove %q: %v", currentActiveSymlink, err1)
} else {
err1 = nil
}
// the data "current" symlink
currentDataSymlink := filepath.Join(filepath.Dir(info.DataDir()), "current")
err2 = os.Remove(currentDataSymlink)
if err2 != nil && !os.IsNotExist(err2) {
logger.Noticef("Failed to remove %q: %v", currentDataSymlink, err2)
} else {
err2 = nil
}
if err1 != nil && err2 != nil {
return fmt.Errorf("cannot remove snap current symlink: %v and %v", err1, err2)
} else if err1 != nil {
return fmt.Errorf("cannot remove snap current symlink: %v", err1)
} else if err2 != nil {
return fmt.Errorf("cannot remove snap current symlink: %v", err2)
}
return nil
}
func (f *fakeSnappyBackend) UndoSetupSnap(s snap.PlaceInfo) error {
f.ops = append(f.ops, fakeOp{
op: "undo-setup-snap",
name: s.MountDir(),
})
return nil
}
func (f *fakeSnappyBackend) RemoveSnapFiles(s snap.PlaceInfo, meter progress.Meter) error {
meter.Notify("remove-snap-files")
f.ops = append(f.ops, fakeOp{
op: "remove-snap-files",
name: s.MountDir(),
})
return nil
}
// removeKernelAssets removes the unpacked kernel/initrd for the given
// kernel snap
func removeKernelAssets(s snap.PlaceInfo, inter interacter) error {
bootloader, err := findBootloader()
if err != nil {
return fmt.Errorf("no not remove kernel assets: %s", err)
}
// remove the kernel blob
blobName := filepath.Base(s.MountFile())
dstDir := filepath.Join(bootloader.Dir(), blobName)
if err := os.RemoveAll(dstDir); err != nil {
return err
}
return nil
}
// RemoveSnapFiles removes the snap files from the disk
func RemoveSnapFiles(s snap.PlaceInfo, meter progress.Meter) error {
mountDir := s.MountDir()
// XXX: nicer way to do this
typ := snap.TypeApp
content, err := ioutil.ReadFile(filepath.Join(mountDir, "meta", "/snap.yaml"))
if err == nil {
info, err := snap.InfoFromSnapYaml(content)
if err == nil {
typ = info.Type
}
}
snapPath := s.MountFile()
// this also ensures that the mount unit stops
if err := removeSquashfsMount(mountDir, meter); err != nil {
return err
}
if err := os.RemoveAll(mountDir); err != nil {
return err
}
// best effort(?)
os.Remove(filepath.Dir(mountDir))
// remove the snap
if err := os.RemoveAll(snapPath); err != nil {
return err
}
// remove the kernel assets (if any)
if typ == snap.TypeKernel {
if err := removeKernelAssets(s, meter); err != nil {
logger.Noticef("removing kernel assets failed with %s", err)
}
}
return nil
}
func UndoSetupSnap(s snap.PlaceInfo, meter progress.Meter) {
// SetupSnap did it not made far enough
if !osutil.FileExists(s.MountDir()) {
return
}
if err := RemoveSnapFiles(s, meter); err != nil {
logger.Noticef("cannot remove snap files: %s", err)
}
mountDir := s.MountDir()
snapPath := s.MountFile()
// remove install dir and the snap blob itself
for _, path := range []string{
mountDir,
snapPath,
} {
if err := os.RemoveAll(path); err != nil {
logger.Noticef("cannot remove snap package at %v: %s", mountDir, err)
}
}
// FIXME: do we need to undo installGadgetHardwareUdevRules via
// cleanupGadgetHardwareUdevRules ? it will go away
// and can only be used during install right now
}