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//
// ubuntu-emu - Tool to download and run Ubuntu Touch emulator instances
//
// Copyright (c) 2013 Canonical Ltd.
//
// Written by Sergio Schvezov <sergio.schvezov@canonical.com>
//
package main
// 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 warranties of
// MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.
import (
"errors"
"fmt"
"path/filepath"
"launchpad.net/goget-ubuntu-touch/diskimage"
)
type SnapshotCmd struct {
Revert string `long:"revert" description:"Reverts to the selected snapshot"`
Create string `long:"create" description:"Creates the selected snapshot"`
Pristine bool `long:"revert-pristine" description:"Reverts to the originally created snapshot"`
}
var snapshotCmd SnapshotCmd
func init() {
parser.AddCommand("snapshot",
"Manipulates snapshots for emulator instance named 'name'",
"Create and revert to snapshots of the emulator instance name 'name' which was previously created",
&snapshotCmd)
}
func (snapshotCmd *SnapshotCmd) Execute(args []string) error {
if len(args) != 1 {
return errors.New("Instance name 'name' is required")
}
if snapshotCmd.Pristine && snapshotCmd.Create != "" && snapshotCmd.Revert != "" {
return errors.New("Only one option can be selected")
}
instanceName := args[0]
dataDir := getInstanceDataDir(instanceName)
if instanceExists(dataDir) != true {
return errors.New(fmt.Sprintf("This instance does not exist, use 'create %s' to create it", instanceName))
}
if snapshotCmd.Pristine {
snapshotCmd.Revert = diskimage.BaseSnapshot
}
sdcardImage := diskimage.NewExisting(filepath.Join(dataDir, "sdcard.img"))
systemImage := diskimage.NewExisting(filepath.Join(dataDir, "system.img"))
images := []*diskimage.DiskImage{systemImage, sdcardImage}
if snapshotCmd.Revert != "" {
for _, img := range images {
if err := img.RevertSnapshot(snapshotCmd.Revert); err != nil {
return err
}
}
} else if snapshotCmd.Create != "" {
for _, img := range images {
if err := img.Snapshot(snapshotCmd.Create); err != nil {
return err
}
}
} else {
errors.New("Command not implemented or supported")
}
return nil
}
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