added vendor/

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

@@ -0,0 +1,57 @@
+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 a [ProgramFunc] to run command in a [Shell].
+func NewShellProgramFunc(command string) ProgramFunc {
+	return func(args ...string) Program {
+		return createProgramCmdRedirectErr(command, args, nil)
+	}
+}
+
+// NewShellProgramFuncWithEnv creates a [ProgramFunc] tu run command
+// in a [Shell] with the given environment variables.
+func NewShellProgramFuncWithEnv(command string, env *map[string]string) ProgramFunc {
+	return func(args ...string) Program {
+		return createProgramCmdRedirectErr(command, args, env)
+	}
+}
+
+func createProgramCmdRedirectErr(command string, args []string, env *map[string]string) *Shell {
+	ec := exec.Command(command, args...)
+	if env != nil {
+		for k, v := range *env {
+			ec.Env = append(ec.Environ(), k+"="+v)
+		}
+	}
+	ec.Stderr = os.Stderr
+	return &Shell{cmd: ec}
+}
+
+// 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
+}