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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/exec"
"strings"
"github.com/google/go-containerregistry/pkg/crane"
v1 "github.com/google/go-containerregistry/pkg/v1"
bus "github.com/mudler/luet/pkg/api/core/bus"
"github.com/mudler/luet/pkg/api/core/image"
"github.com/mudler/luet/pkg/api/core/types"
"github.com/pkg/errors"
)
type SimpleImg struct {
ctx types.Context
}
func NewSimpleImgBackend(ctx types.Context) *SimpleImg {
return &SimpleImg{ctx: ctx}
}
func (s *SimpleImg) LoadImage(string) error {
return errors.New("Not supported")
}
// TODO: Missing still: labels, and build args expansion
func (s *SimpleImg) BuildImage(opts Options) error {
name := opts.ImageName
bus.Manager.Publish(bus.EventImagePreBuild, opts)
buildarg := genBuildCommand(opts)
s.ctx.Info(":tea: Building image " + name)
cmd := exec.Command("img", buildarg...)
cmd.Dir = opts.SourcePath
err := runCommand(s.ctx, cmd)
if err != nil {
return err
}
bus.Manager.Publish(bus.EventImagePostBuild, opts)
s.ctx.Info(":tea: Building image " + name + " done")
return nil
}
func (s *SimpleImg) RemoveImage(opts Options) error {
name := opts.ImageName
buildarg := []string{"rm", name}
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed removing image: "+string(out))
}
s.ctx.Info(":tea: Image " + name + " removed")
return nil
}
func (s *SimpleImg) ImageReference(a string, ondisk bool) (v1.Image, error) {
f, err := s.ctx.TempFile("snapshot")
if err != nil {
return nil, err
}
buildarg := []string{"save", a, "-o", f.Name()}
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return nil, errors.Wrap(err, "Failed saving image: "+string(out))
}
img, err := crane.Load(f.Name())
if err != nil {
return nil, err
}
return img, nil
}
func (s *SimpleImg) DownloadImage(opts Options) error {
name := opts.ImageName
bus.Manager.Publish(bus.EventImagePrePull, opts)
buildarg := []string{"pull", name}
s.ctx.Debug(":tea: Downloading image " + name)
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
cmd := exec.Command("img", buildarg...)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed downloading image: "+string(out))
}
s.ctx.Info(":tea: Image " + name + " downloaded")
bus.Manager.Publish(bus.EventImagePostPull, opts)
return nil
}
func (s *SimpleImg) CopyImage(src, dst string) error {
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
s.ctx.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))
}
s.ctx.Info(":tea: Image " + dst + " tagged")
return nil
}
func (s *SimpleImg) ImageAvailable(imagename string) bool {
return image.Available(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 (s *SimpleImg) ExportImage(opts Options) error {
name := opts.ImageName
path := opts.Destination
buildarg := []string{"save", "-o", path, name}
s.ctx.Debug(":tea: Saving image " + name)
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
out, err := exec.Command("img", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed exporting image: "+string(out))
}
s.ctx.Info(":tea: Image " + name + " saved")
return nil
}
func (s *SimpleImg) Push(opts Options) error {
name := opts.ImageName
bus.Manager.Publish(bus.EventImagePrePush, opts)
pusharg := []string{"push", name}
out, err := exec.Command("img", pusharg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed pushing image: "+string(out))
}
s.ctx.Info(":tea: Pushed image:", name)
bus.Manager.Publish(bus.EventImagePostPush, opts)
//s.ctx.Info(string(out))
return nil
}