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/*
Copyright 2020 Docker Compose CLI authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package compose
import (
"context"
"errors"
"fmt"
"io"
"strings"
"github.com/compose-spec/compose-go/v2/types"
"github.com/docker/cli/cli/streams"
moby "github.com/docker/docker/api/types"
containerType "github.com/docker/docker/api/types/container"
"github.com/docker/docker/pkg/stdcopy"
"github.com/moby/term"
"github.com/docker/compose/v2/pkg/api"
"github.com/docker/compose/v2/pkg/utils"
)
func (s *composeService) attach(ctx context.Context, project *types.Project, listener api.ContainerEventListener, selectedServices []string) (Containers, error) {
containers, err := s.getContainers(ctx, project.Name, oneOffExclude, true, selectedServices...)
if err != nil {
return nil, err
}
if len(containers) == 0 {
return containers, nil
}
containers.sorted() // This enforces predictable colors assignment
var names []string
for _, c := range containers {
names = append(names, getContainerNameWithoutProject(c))
}
_, _ = fmt.Fprintf(s.stdout(), "Attaching to %s\n", strings.Join(names, ", "))
for _, container := range containers {
err := s.attachContainer(ctx, container, listener)
if err != nil {
return nil, err
}
}
return containers, err
}
func (s *composeService) attachContainer(ctx context.Context, container moby.Container, listener api.ContainerEventListener) error {
serviceName := container.Labels[api.ServiceLabel]
containerName := getContainerNameWithoutProject(container)
listener(api.ContainerEvent{
Type: api.ContainerEventAttach,
Container: containerName,
ID: container.ID,
Service: serviceName,
})
wOut := utils.GetWriter(func(line string) {
listener(api.ContainerEvent{
Type: api.ContainerEventLog,
Container: containerName,
ID: container.ID,
Service: serviceName,
Line: line,
})
})
wErr := utils.GetWriter(func(line string) {
listener(api.ContainerEvent{
Type: api.ContainerEventErr,
Container: containerName,
ID: container.ID,
Service: serviceName,
Line: line,
})
})
inspect, err := s.apiClient().ContainerInspect(ctx, container.ID)
if err != nil {
return err
}
_, _, err = s.attachContainerStreams(ctx, container.ID, inspect.Config.Tty, nil, wOut, wErr)
return err
}
func (s *composeService) attachContainerStreams(ctx context.Context, container string, tty bool, stdin io.ReadCloser, stdout, stderr io.WriteCloser) (func(), chan bool, error) {
detached := make(chan bool)
restore := func() { /* noop */ }
if stdin != nil {
in := streams.NewIn(stdin)
if in.IsTerminal() {
state, err := term.SetRawTerminal(in.FD())
if err != nil {
return restore, detached, err
}
restore = func() {
term.RestoreTerminal(in.FD(), state) //nolint:errcheck
}
}
}
streamIn, streamOut, err := s.getContainerStreams(ctx, container)
if err != nil {
return restore, detached, err
}
go func() {
<-ctx.Done()
if stdin != nil {
stdin.Close() //nolint:errcheck
}
}()
if streamIn != nil && stdin != nil {
go func() {
_, err := io.Copy(streamIn, stdin)
var escapeErr term.EscapeError
if errors.As(err, &escapeErr) {
close(detached)
}
}()
}
if stdout != nil {
go func() {
defer stdout.Close() //nolint:errcheck
defer stderr.Close() //nolint:errcheck
defer streamOut.Close() //nolint:errcheck
if tty {
io.Copy(stdout, streamOut) //nolint:errcheck
} else {
stdcopy.StdCopy(stdout, stderr, streamOut) //nolint:errcheck
}
}()
}
return restore, detached, nil
}
func (s *composeService) getContainerStreams(ctx context.Context, container string) (io.WriteCloser, io.ReadCloser, error) {
var stdout io.ReadCloser
var stdin io.WriteCloser
cnx, err := s.apiClient().ContainerAttach(ctx, container, containerType.AttachOptions{
Stream: true,
Stdin: true,
Stdout: true,
Stderr: true,
Logs: false,
})
if err == nil {
stdout = ContainerStdout{HijackedResponse: cnx}
stdin = ContainerStdin{HijackedResponse: cnx}
return stdin, stdout, nil
}
// Fallback to logs API
logs, err := s.apiClient().ContainerLogs(ctx, container, containerType.LogsOptions{
ShowStdout: true,
ShowStderr: true,
Follow: true,
})
if err != nil {
return nil, nil, err
}
return stdin, logs, nil
}
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