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simpleimg.go
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/
simpleimg.go
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// Copyright © 2019 Ettore Di Giacinto <mudler@gentoo.org>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// 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 backend
import (
"os"
"os/exec"
"strings"
. "github.com/geaaru/luet/pkg/logger"
"github.com/pkg/errors"
)
type SimpleImg struct{}
func NewSimpleImgBackend() *SimpleImg {
return &SimpleImg{}
}
// TODO: Missing still: labels, and build args expansion
func (*SimpleImg) BuildImage(opts Options) error {
name := opts.ImageName
buildarg := genBuildCommand(opts)
Info(":tea: Building image " + name)
cmd := exec.Command("img", buildarg...)
cmd.Dir = opts.SourcePath
err := runCommand(cmd)
if err != nil {
return err
}
Info(":tea: Building image " + name + " done")
return nil
}
func (*SimpleImg) RemoveImage(opts Options) error {
name := opts.ImageName
buildarg := []string{"rm", name}
Spinner(22)
defer SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed removing image: "+string(out))
}
Info(":tea: Image " + name + " removed")
return nil
}
func (*SimpleImg) DownloadImage(opts Options) error {
name := opts.ImageName
buildarg := []string{"pull", name}
Debug(":tea: Downloading image " + name)
Spinner(22)
defer SpinnerStop()
cmd := exec.Command("img", buildarg...)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed downloading image: "+string(out))
}
Info(":tea: Image " + name + " downloaded")
return nil
}
func (*SimpleImg) CopyImage(src, dst string) error {
Spinner(22)
defer SpinnerStop()
Debug(":tea: Tagging image", src, dst)
cmd := exec.Command("img", "tag", src, dst)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed tagging image: "+string(out))
}
Info(":tea: Image " + dst + " tagged")
return nil
}
func (*SimpleImg) ImageAvailable(imagename string) bool {
return imageAvailable(imagename)
}
// ImageExists check if the given image is available locally
func (*SimpleImg) ImageExists(imagename string) bool {
cmd := exec.Command("img", "ls")
out, err := cmd.Output()
if err != nil {
return false
}
if strings.Contains(string(out), imagename) {
return true
}
return false
}
func (s *SimpleImg) ImageDefinitionToTar(opts Options) error {
if err := s.BuildImage(opts); err != nil {
return errors.Wrap(err, "Failed building image")
}
if err := s.ExportImage(opts); err != nil {
return errors.Wrap(err, "Failed exporting image")
}
if err := s.RemoveImage(opts); err != nil {
return errors.Wrap(err, "Failed removing image")
}
return nil
}
func (*SimpleImg) ExportImage(opts Options) error {
name := opts.ImageName
path := opts.Destination
buildarg := []string{"save", "-o", path, name}
Debug(":tea: Saving image " + name)
Spinner(22)
defer SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed exporting image: "+string(out))
}
Info(":tea: Image " + name + " saved")
return nil
}
// ExtractRootfs extracts the docker image content inside the destination
func (s *SimpleImg) ExtractRootfs(opts Options, keepPerms bool) error {
name := opts.ImageName
path := opts.Destination
if !s.ImageExists(name) {
if err := s.DownloadImage(opts); err != nil {
return errors.Wrap(err, "failed pulling image "+name+" during extraction")
}
}
os.RemoveAll(path)
buildarg := []string{"unpack", "-o", path, name}
Debug(":tea: Extracting image " + name)
Spinner(22)
defer SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed extracting image: "+string(out))
}
Debug(":tea: Image " + name + " extracted")
return nil
}
func (*SimpleImg) Push(opts Options) error {
name := opts.ImageName
pusharg := []string{"push", name}
out, err := exec.Command("img", pusharg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed pushing image: "+string(out))
}
Info(":tea: Pushed image:", name)
//Info(string(out))
return nil
}