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exec.go
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exec.go
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package container
import (
"context"
"io"
"github.com/docker/docker/api/types"
dc "github.com/docker/docker/api/types/container"
)
// ExecOptions is the options for Exec.
type ExecOptions struct {
Detach bool
Tty bool
Cmd []string
//
AttachStdin bool
}
type ExecTerm struct {
io.ReadWriteCloser
Resize func(width, height uint) error
}
// Exec executes a command inside a container.
func (c *container) Exec(ctx context.Context, id string, opts ...func(opt *ExecOptions)) (*ExecTerm, error) {
opt := &ExecOptions{
AttachStdin: true,
}
for _, o := range opts {
o(opt)
}
response, err := c.client.ContainerExecCreate(ctx, id, dc.ExecOptions{
AttachStdin: opt.AttachStdin,
AttachStdout: true,
AttachStderr: true,
Tty: opt.Tty,
Cmd: opt.Cmd,
// ConsoleSize: &[2]uint{300, 600},
})
if err != nil {
return nil, err
}
stream, err := c.client.ContainerExecAttach(ctx, response.ID, dc.ExecStartOptions{
Detach: opt.Detach,
Tty: opt.Tty,
// ConsoleSize: &[2]uint{300, 600},
})
if err != nil {
return nil, err
}
// if err := c.client.ContainerExecStart(ctx, response.ID, dc.ExecStartOptions{}); err != nil {
// return nil, nil, err
// }
resize := func(width, height uint) error {
if !opt.Tty {
return nil
}
return c.client.ContainerExecResize(ctx, response.ID, dc.ResizeOptions{
Width: width,
Height: height,
})
}
// defer stream.Close()
// if opt.Stdin != nil {
// go io.Copy(stream.Conn, os.Stdin)
// }
// if _, err := io.Copy(opt.Stdout, stream.Reader); err != nil {
// return err
// }
// return nil
return &ExecTerm{
ReadWriteCloser: &ExecStream{stream},
Resize: resize,
}, nil
}
type ExecStream struct {
types.HijackedResponse
}
func (s *ExecStream) Close() error {
s.HijackedResponse.Close()
return nil
}
func (s *ExecStream) Read(p []byte) (n int, err error) {
return s.Reader.Read(p)
}
func (s *ExecStream) Write(p []byte) (n int, err error) {
return s.Conn.Write(p)
}