Move cncd/pipeline/pipeline/ to pipeline/ (#347)

* Refactor: move cncd/pipeline/ to pipeline/

* Refactor: move pipeline/pipeline/ to pipeline/

pipeline/backend/docker/docker.go

@@ -0,0 +1,208 @@
+package docker
+
+import (
+	"context"
+	"github.com/docker/docker/pkg/jsonmessage"
+	"github.com/docker/docker/pkg/stdcopy"
+	"github.com/docker/docker/pkg/term"
+	"io"
+	"os"
+
+	"github.com/woodpecker-ci/woodpecker/pipeline/backend"
+
+	"docker.io/go-docker"
+	"docker.io/go-docker/api/types"
+	"docker.io/go-docker/api/types/network"
+	"docker.io/go-docker/api/types/volume"
+)
+
+type engine struct {
+	client docker.APIClient
+}
+
+// New returns a new Docker Engine using the given client.
+func New(cli docker.APIClient) backend.Engine {
+	return &engine{
+		client: cli,
+	}
+}
+
+// NewEnv returns a new Docker Engine using the client connection
+// environment variables.
+func NewEnv() (backend.Engine, error) {
+	cli, err := docker.NewEnvClient()
+	if err != nil {
+		return nil, err
+	}
+	return New(cli), nil
+}
+
+func (e *engine) Setup(_ context.Context, conf *backend.Config) error {
+	for _, vol := range conf.Volumes {
+		_, err := e.client.VolumeCreate(noContext, volume.VolumesCreateBody{
+			Name:       vol.Name,
+			Driver:     vol.Driver,
+			DriverOpts: vol.DriverOpts,
+			// Labels:     defaultLabels,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	for _, network := range conf.Networks {
+		_, err := e.client.NetworkCreate(noContext, network.Name, types.NetworkCreate{
+			Driver:  network.Driver,
+			Options: network.DriverOpts,
+			// Labels:  defaultLabels,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (e *engine) Exec(ctx context.Context, proc *backend.Step) error {
+	config := toConfig(proc)
+	hostConfig := toHostConfig(proc)
+
+	// create pull options with encoded authorization credentials.
+	pullopts := types.ImagePullOptions{}
+	if proc.AuthConfig.Username != "" && proc.AuthConfig.Password != "" {
+		pullopts.RegistryAuth, _ = encodeAuthToBase64(proc.AuthConfig)
+	}
+
+	// automatically pull the latest version of the image if requested
+	// by the process configuration.
+	if proc.Pull {
+		responseBody, perr := e.client.ImagePull(ctx, config.Image, pullopts)
+		if perr == nil {
+			defer responseBody.Close()
+
+			fd, isTerminal := term.GetFdInfo(os.Stdout)
+			jsonmessage.DisplayJSONMessagesStream(responseBody, os.Stdout, fd, isTerminal, nil)
+		}
+		// fix for drone/drone#1917
+		if perr != nil && proc.AuthConfig.Password != "" {
+			return perr
+		}
+	}
+
+	_, err := e.client.ContainerCreate(ctx, config, hostConfig, nil, proc.Name)
+	if docker.IsErrImageNotFound(err) {
+		// automatically pull and try to re-create the image if the
+		// failure is caused because the image does not exist.
+		responseBody, perr := e.client.ImagePull(ctx, config.Image, pullopts)
+		if perr != nil {
+			return perr
+		}
+		defer responseBody.Close()
+		fd, isTerminal := term.GetFdInfo(os.Stdout)
+		jsonmessage.DisplayJSONMessagesStream(responseBody, os.Stdout, fd, isTerminal, nil)
+
+		_, err = e.client.ContainerCreate(ctx, config, hostConfig, nil, proc.Name)
+	}
+	if err != nil {
+		return err
+	}
+
+	if len(proc.NetworkMode) == 0 {
+		for _, net := range proc.Networks {
+			err = e.client.NetworkConnect(ctx, net.Name, proc.Name, &network.EndpointSettings{
+				Aliases: net.Aliases,
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	// if proc.Network != "host" { // or bridge, overlay, none, internal, container:<name> ....
+	// 	err = e.client.NetworkConnect(ctx, proc.Network, proc.Name, &network.EndpointSettings{
+	// 		Aliases: proc.NetworkAliases,
+	// 	})
+	// 	if err != nil {
+	// 		return err
+	// 	}
+	// }
+
+	return e.client.ContainerStart(ctx, proc.Name, startOpts)
+}
+
+func (e *engine) Kill(_ context.Context, proc *backend.Step) error {
+	return e.client.ContainerKill(noContext, proc.Name, "9")
+}
+
+func (e *engine) Wait(ctx context.Context, proc *backend.Step) (*backend.State, error) {
+	wait, errc := e.client.ContainerWait(ctx, proc.Name, "")
+	select {
+	case <-wait:
+	case <-errc:
+	}
+
+	info, err := e.client.ContainerInspect(ctx, proc.Name)
+	if err != nil {
+		return nil, err
+	}
+	if info.State.Running {
+		// todo
+	}
+
+	return &backend.State{
+		Exited:    true,
+		ExitCode:  info.State.ExitCode,
+		OOMKilled: info.State.OOMKilled,
+	}, nil
+}
+
+func (e *engine) Tail(ctx context.Context, proc *backend.Step) (io.ReadCloser, error) {
+	logs, err := e.client.ContainerLogs(ctx, proc.Name, logsOpts)
+	if err != nil {
+		return nil, err
+	}
+	rc, wc := io.Pipe()
+
+	go func() {
+		stdcopy.StdCopy(wc, wc, logs)
+		logs.Close()
+		wc.Close()
+		rc.Close()
+	}()
+	return rc, nil
+}
+
+func (e *engine) Destroy(_ context.Context, conf *backend.Config) error {
+	for _, stage := range conf.Stages {
+		for _, step := range stage.Steps {
+			e.client.ContainerKill(noContext, step.Name, "9")
+			e.client.ContainerRemove(noContext, step.Name, removeOpts)
+		}
+	}
+	for _, volume := range conf.Volumes {
+		e.client.VolumeRemove(noContext, volume.Name, true)
+	}
+	for _, network := range conf.Networks {
+		e.client.NetworkRemove(noContext, network.Name)
+	}
+	return nil
+}
+
+var (
+	noContext = context.Background()
+
+	startOpts = types.ContainerStartOptions{}
+
+	removeOpts = types.ContainerRemoveOptions{
+		RemoveVolumes: true,
+		RemoveLinks:   false,
+		Force:         false,
+	}
+
+	logsOpts = types.ContainerLogsOptions{
+		Follow:     true,
+		ShowStdout: true,
+		ShowStderr: true,
+		Details:    false,
+		Timestamps: false,
+	}
+)