サンプル

Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser

sha256:4bf9cbc16740182dbe7fcca88866b9e64c94372e4115587056c4b525005ba078

ケース

ゴール

Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser HOW

パッケージ

commander 15.0.0

環境

node

作成日

2026-08-17T01:48:40Z

よくある思い込み

An option configured with an optional value and a custom argParser coerces a fallback value through argParser when the flag is invoked without an argument on the command line.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• Option.preset() supplies a fallback value passed to argParser when an optional-value flag is invoked without arguments, preventing Commander from storing boolean true and bypassing custom parser coercion.
• opts() contains boolean true instead of a parsed number when an optional-value option lacks a preset and is passed without an argument
• opts() retains the default value when the optional-value flag is omitted entirely
• opts() contains the parsed custom argument when the flag is passed with an explicit value
• accumulating option collectors append preset values on valueless flag invocations instead of having the entire accumulated array overwritten by boolean true
• options configured with choices validate against preset values rather than assigning boolean true outside the allowed choices list

ファイル

• NOTES.md
• csx.json
• package-lock.json
• package.json
• src/index.mjs
• test/contract.mjs

検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列

オリジンシーダー

csx-seed

検証レシート

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9