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CLI: unknown options are usage errors (#168)

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Args::parse kept any unrecognised `--option` as a valueless flag nobody
read, so `exec comp.new --bogus` ran with defaults and exit 0, and a
misspelt valued option left its value behind as a positional:
`--saveas z.ecproj` opened z.ecproj as the project and failed with an
unrelated "cannot read" error.

Options are now checked against the declared lists (VALUED and the new
FLAGS) before anything runs; unknown ones are a usage error naming them
(exit 2), and `--flag=value` on a flag says it takes no value.
render-frame's `--transparent` (the MCP render_frame option) was one of
the silently ignored options; it now keeps the frame's alpha.

Tests: unknown_options_are_refused, every_option_read_is_declared (every
option the code reads is declared, so none is refused),
unknown_options_are_usage_errors (exit 2, nothing runs or renders, and
--transparent renders alpha).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-07 15:48:17 +07:00
co-authored by Claude Opus 5.5
parent 2dda81c9bc
commit 50f26e6a47
3 changed files with 99 additions and 5 deletions
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docs/agents.md
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@@ -430,7 +430,8 @@ that closes the dialog). File ▸ Scripts: `file.scripts.list`, `file.runScript
Each invocation runs a headless engine with no window. It opens the demo project unless you pass
`--project F.ecproj`, a positional `*.ecproj` or `--empty`. Add `--json` for one compact JSON document
on stdout. Errors print `{"error": ...}` and exit with status 1; usage errors exit with status 2.
on stdout. Errors print `{"error": ...}` and exit with status 1; usage errors, such as an unknown
option, exit with status 2 before anything runs.
```sh
effectcraft-cli info --json