clap_builder 4.6.2

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[dependencies]
clap_builder = "=4.6.2"

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:cargo/clap_builder@4.6.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/clap_builder@4.6.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:6e81fc83ffd295b79b85cdeff5581e7d72347278bea9cd86168ac2c6c7b1c24b","contract":["Command::new configures arguments with Arg::new and ArgAction::SetTrue","get_matches_from parses required --name option and -v flag offline"],"goal":"verify pkg:cargo/clap_builder@4.6.2","kind":"HOW","packages":["pkg:cargo/clap_builder@4.6.2"],"schemaVersion":1},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","ecosystem":"cargo","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/clap_builder@4.6.2"],"schemaVersion":1,"subject":"pkg:cargo/clap_builder@4.6.2","verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/clap_builder@4.6.2",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/clap_builder@4.6.2"
  ]
}

use clap_builder::{Arg, ArgAction, Command};

pub fn build_cli() -> Command {
    Command::new("demo")
        .arg(
            Arg::new("name")
                .long("name")
                .required(true),
        )
        .arg(
            Arg::new("verbose")
                .short('v')
                .action(ArgAction::SetTrue),
        )
}

fn main() {
    let matches = build_cli().get_matches_from(["demo", "--name", "world", "-v"]);
    assert_eq!(matches.get_one::<String>("name").map(|s| s.as_str()), Some("world"));
    assert!(matches.get_flag("verbose"));
}

use clap_builder::{Arg, ArgAction, Command};

#[test]
fn contract_test() {
    let cmd = Command::new("demo")
        .arg(
            Arg::new("name")
                .long("name")
                .required(true),
        )
        .arg(
            Arg::new("verbose")
                .short('v')
                .action(ArgAction::SetTrue),
        );

    let matches = cmd.try_get_matches_from(["demo", "--name", "world", "-v"]).unwrap();
    assert_eq!(matches.get_one::<String>("name").map(|s| s.as_str()), Some("world"));
    assert!(matches.get_flag("verbose"));
}