projects defaults show prints nothing in text mode when a project has no defaults

[gdameneses]

Summary

urlbox projects defaults show <project> prints zero bytes in text mode when the project has no default options. The JSON envelope carries a perfectly good summary; text mode drops it.

Reproduce

1. Pick any project with no defaultOptions set.

2. Run it in text mode:

   urlbox projects defaults show <project> --output-format text

Expected

A line saying there are no defaults — the summary the envelope already contains.

Actual

Nothing. Exit code 0, empty stdout:

$ urlbox projects defaults show <project> --output-format text | wc -c
0

JSON mode has the message all along:

{
  "ok": true,
  "command": "projects defaults show",
  "data": {"defaults": {}, "project": "proj_xxx"},
  "summary": "0 default options on proj_xxx"
}

A command that prints nothing and exits 0 is indistinguishable from a hang or a silently broken subcommand.

Cause

Two behaviours combine:

• internal/output/format.go:60 prints the summary only when there is no view:

  if env.Summary != "" && (!env.OK || env.view == nil) {

• internal/output/render.go:74 — RenderKV returns early on an empty slice ("An empty pairs writes nothing").

runProjectsDefaultsShow called env.SetKV(...) unconditionally, so with zero defaults the view was non-nil (suppressing the summary) but rendered nothing. Net result: no output at all.

Fix

Attach the view only when there is something in it, so the existing summary survives — internal/cmd/projects.go:

	// A viewless envelope keeps its summary in text mode; an empty KV view
	// renders nothing at all, so a project with no defaults would print
	// zero bytes. Only attach the view when there is something to show.
	if pairs := optionsKVPairs(defaults); len(pairs) > 0 {
		env.SetKV(pairs)
	}

Text mode then prints 0 default options on proj_xxx. JSON output is unchanged.

Worth checking whether any other command calls SetKV/SetTable with a possibly-empty collection — the same silent-empty-output pattern would apply.

Environment

urlbox 1.2.0 (commit 5530665), Linux.