cli

type Runner struct {
	Stdout, Stderr io.Writer
	// Build loads configuration for the named context (app.Build in production).
	Build func(ctx context.Context, contextName string) (*app.App, error)
	// Reexec replaces the process with the exec provider's wrapper; it returns only on failure.
	Reexec func(p config.Provider) error
	// ServeMCP serves srv until the client goes away (stdio in production).
	ServeMCP func(ctx context.Context, srv *mcp.Server) error
	Now      func() time.Time
	// Stdin is standard input, read by a flag such as --from - in the process that
	// holds the credential; nil reads as empty.
	Stdin io.Reader
	// Registry returns the tools the commands run; nil means the product's. Tests
	// set it to run the framework through tools of their own.
	Registry func() *registry.Registry
	// Probe runs `probe-acl`, the owner's live probes of the validate endpoint. It
	// is nil in every build but one made with -tags probe, which only `make probe-acl` makes;
	// with it nil the command does not exist: it is not in the help and answers as an unknown
	// area.
	Probe func(ctx context.Context, c *api.Client, args []string, stdout, stderr io.Writer) int
	// Getenv reads the environment (os.Getenv when nil): TAILKEEPER_LIVE for probe-acl, and
	// NO_COLOR and TERM for the colour of the human layout. IsTerminal says whether a writer
	// is a terminal (a character device when nil).
	Getenv     func(string) string
	IsTerminal func(io.Writer) bool
}