luet/pkg/compiler/backend/simpledocker.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"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/daemon"
"github.com/mudler/luet/pkg/api/core/types"
bus "github.com/mudler/luet/pkg/bus"
v1 "github.com/google/go-containerregistry/pkg/v1"
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"github.com/pkg/errors"
)
type SimpleDocker struct {
ctx *types.Context
}
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func NewSimpleDockerBackend(ctx *types.Context) *SimpleDocker {
return &SimpleDocker{ctx: ctx}
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}
// TODO: Missing still: labels, and build args expansion
func (s *SimpleDocker) BuildImage(opts Options) error {
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name := opts.ImageName
bus.Manager.Publish(bus.EventImagePreBuild, opts)
buildarg := genBuildCommand(opts)
s.ctx.Info(":whale2: Building image " + name)
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cmd := exec.Command("docker", buildarg...)
cmd.Dir = opts.SourcePath
err := runCommand(s.ctx, cmd)
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if err != nil {
return err
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}
s.ctx.Success(":whale: Building image " + name + " done")
bus.Manager.Publish(bus.EventImagePostBuild, opts)
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return nil
}
func (s *SimpleDocker) CopyImage(src, dst string) error {
s.ctx.Debug(":whale: Tagging image:", src, "->", dst)
cmd := exec.Command("docker", "tag", src, dst)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed tagging image: "+string(out))
}
s.ctx.Success(":whale: Tagged image:", src, "->", dst)
return nil
}
func (s *SimpleDocker) DownloadImage(opts Options) error {
name := opts.ImageName
bus.Manager.Publish(bus.EventImagePrePull, opts)
buildarg := []string{"pull", name}
s.ctx.Debug(":whale: Downloading image " + name)
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
cmd := exec.Command("docker", buildarg...)
out, err := cmd.CombinedOutput()
if err != nil {
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return errors.Wrap(err, "Failed pulling image: "+string(out))
}
s.ctx.Success(":whale: Downloaded image:", name)
bus.Manager.Publish(bus.EventImagePostPull, opts)
return nil
}
func (s *SimpleDocker) ImageExists(imagename string) bool {
buildarg := []string{"inspect", "--type=image", imagename}
s.ctx.Debug(":whale: Checking existance of docker image: " + imagename)
cmd := exec.Command("docker", buildarg...)
out, err := cmd.CombinedOutput()
if err != nil {
s.ctx.Debug("Image not present")
s.ctx.Debug(string(out))
return false
}
return true
}
func (*SimpleDocker) ImageAvailable(imagename string) bool {
return imageAvailable(imagename)
}
func (s *SimpleDocker) RemoveImage(opts Options) error {
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name := opts.ImageName
buildarg := []string{"rmi", name}
out, err := exec.Command("docker", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed removing image: "+string(out))
}
s.ctx.Success(":whale: Removed image:", name)
//Info(string(out))
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return nil
}
func (s *SimpleDocker) Push(opts Options) error {
name := opts.ImageName
pusharg := []string{"push", name}
bus.Manager.Publish(bus.EventImagePrePush, opts)
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
out, err := exec.Command("docker", pusharg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed pushing image: "+string(out))
}
s.ctx.Success(":whale: Pushed image:", name)
bus.Manager.Publish(bus.EventImagePostPush, opts)
//Info(string(out))
return nil
}
func (s *SimpleDocker) ImageReference(a string) (v1.Image, error) {
ref, err := name.ParseReference(a)
if err != nil {
return nil, err
}
img, err := daemon.Image(ref)
if err != nil {
return nil, err
}
return img, nil
}
func (s *SimpleDocker) ImageDefinitionToTar(opts Options) error {
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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 *SimpleDocker) ExportImage(opts Options) error {
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name := opts.ImageName
path := opts.Destination
buildarg := []string{"save", name, "-o", path}
s.ctx.Debug(":whale: Saving image " + name)
s.ctx.Spinner()
defer s.ctx.SpinnerStop()
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out, err := exec.Command("docker", buildarg...).CombinedOutput()
if err != nil {
return errors.Wrap(err, "Failed exporting image: "+string(out))
}
s.ctx.Debug(":whale: Exported image:", name)
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return nil
}
type ManifestEntry struct {
Layers []string `json:"Layers"`
}