DockerCLI/vendor/github.com/docker/docker-credential-helpers/client/command.go

45 lines
1.0 KiB
Go

package client
import (
"io"
"os"
"os/exec"
)
// Program is an interface to execute external programs.
type Program interface {
Output() ([]byte, error)
Input(in io.Reader)
}
// ProgramFunc is a type of function that initializes programs based on arguments.
type ProgramFunc func(args ...string) Program
// NewShellProgramFunc creates programs that are executed in a Shell.
func NewShellProgramFunc(name string) ProgramFunc {
return func(args ...string) Program {
return &Shell{cmd: newCmdRedirectErr(name, args)}
}
}
func newCmdRedirectErr(name string, args []string) *exec.Cmd {
newCmd := exec.Command(name, args...)
newCmd.Stderr = os.Stderr
return newCmd
}
// Shell invokes shell commands to talk with a remote credentials helper.
type Shell struct {
cmd *exec.Cmd
}
// Output returns responses from the remote credentials helper.
func (s *Shell) Output() ([]byte, error) {
return s.cmd.Output()
}
// Input sets the input to send to a remote credentials helper.
func (s *Shell) Input(in io.Reader) {
s.cmd.Stdin = in
}