update

var ErrUpdateDeclined = errors.New("codegen: stopped before generating — nothing was written")

ErrUpdateDeclined is codegen stopping because the operator chose to.

var Interactive = func() bool {
	if os.Getenv("CI") != "" {
		return false
	}
	return term.IsTerminal(int(os.Stdin.Fd())) && term.IsTerminal(int(os.Stdout.Fd()))
}

Interactive reports whether codegen may ask: a person at a terminal, not a pipeline. CI is never asked — there the floor refusal codegen already has is the answer, and a prompt would hang the job.

var NewPrompter = prompter.NewStdinPrompter

NewPrompter is the input source for the codegen prompt; a seam for tests.

var PreGenerateTimeout = 20 * time.Second

PreGenerate is the check `w17ctl codegen` runs before generating.

At a terminal only. A REQUIRED update (the project pins an sdk/go older than the floor the code is generated against) is offered, and declining stops codegen: the code it would write cannot build, and codegen would refuse it afterwards anyway. An AVAILABLE update is offered with "continue anyway" in the alpha phase, where any release may carry a breaking fix and the advice to adopters is to stay current; from v1 it is one line and codegen goes on.

If the binary itself was replaced, codegen stops so it is re-run by the new one — this process is the old client. PreGenerateTimeout bounds the check codegen runs first. It asks the network (the installer, the module proxy, every plugin's registry) and codegen did not use to; a captive portal or a stalled proxy must cost codegen this much at most, never a hang.

var RunInstallerFn = runInstaller

RunInstallerFn shells out to the installer. Indirected so tests can drive the command without a network or a write to a real bin directory.