// DownloadSnap downloads the snap with the given name and optionally revision using the provided store and options. It returns the final full path of the snap inside the opts.TargetDir and a snap.Info for the snap.
func DownloadSnap(sto Store, name string, revision snap.Revision, opts *DownloadOptions) (targetFn string, info *snap.Info, err error) {
if opts == nil {
opts = &DownloadOptions{}
}
targetDir := opts.TargetDir
if targetDir == "" {
pwd, err := os.Getwd()
if err != nil {
return "", nil, err
}
targetDir = pwd
}
snap, err := sto.Snap(name, opts.Channel, opts.DevMode, revision, opts.User)
if err != nil {
return "", nil, fmt.Errorf("cannot find snap %q: %v", name, err)
}
baseName := filepath.Base(snap.MountFile())
targetFn = filepath.Join(targetDir, baseName)
pb := progress.NewTextProgress()
if err = sto.Download(context.TODO(), name, targetFn, &snap.DownloadInfo, pb, opts.User); err != nil {
return "", nil, err
}
return targetFn, snap, nil
}
// InUse checks if the given name/revision is used in the
// boot environment
func InUse(name string, rev snap.Revision) bool {
bootloader, err := partition.FindBootloader()
if err != nil {
logger.Noticef("cannot get boot settings: %s", err)
return false
}
bootVars, err := bootloader.GetBootVars("snap_kernel", "snap_try_kernel", "snap_core", "snap_try_core")
if err != nil {
logger.Noticef("cannot get boot vars: %s", err)
return false
}
snapFile := filepath.Base(snap.MountFile(name, rev))
for _, bootVar := range bootVars {
if bootVar == snapFile {
return true
}
}
return false
}
func (snapsup *SnapSetup) MountFile() string {
return snap.MountFile(snapsup.Name(), snapsup.Revision())
}
func (ss *SnapSetup) MountFile() string {
return snap.MountFile(ss.Name(), ss.Revision())
}