示例
clap 4.6.6: Resolve CLI arguments, environment variable fallbacks, boolish string parsing, and global flag propagation in clap 4
已验证示例 — cargo clap 4.6.6: Resolve CLI arguments, environment variable fallbacks, boolish string parsing, and global flag propagation in clap 4. contract 在…
sha256:180d422125e4f071abdccde9278c47db4d70a518c3b0ed8510954e46c49c9aeb
本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。
提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。
MIT-0
执行证据
声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。
- 证据依据
- 签名契约通过
- 验证回执
- 2
- 构建过它的签名密钥
- 2
声明的环境
rust linux x64 rust rust cargo
验证运行环境
| 环境 | 契约 | 阶段 | 运行日期 |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
案例
HOW- 目标
- Resolve CLI arguments, environment variable fallbacks, boolish string parsing, and global flag propagation in clap 4
- 符号
-
- Parser::try_parse_from
- ArgAction::SetTrue
- ArgAction::Set
- BoolishValueParser
- ArgMatches::get_flag
- ArgMatches::get_one
- ErrorKind::InvalidValue
- ErrorKind::ValueValidation
- ErrorKind::UnknownArgument
- 环境
- rust
- 创建时间
- 2026-08-16T08:09:44Z
契约
- assert default values populate when environment variables and CLI arguments are omitted
- assert environment variable fallbacks populate fields when CLI flags are absent
- assert CLI options take strict precedence over environment variables
- assert empty string environment variable for integer fails with ValueValidation instead of falling back to default
- assert empty string environment variable for Option<String> resolves to Some("") rather than None
- assert default derive bool with env uses strict bool::from_str, rejecting 1, 0, yes, and no with InvalidValue
- assert BoolishValueParser resolves truthy and falsy strings including 1, 0, yes, no, on, off to boolean values
- assert global flags propagate across subcommands while non-global options placed after subcommands fail with UnknownArgument
- assert get_flag returns false for omitted SetTrue flag and panics when called on ArgAction::Set argument
文件
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs
- tests/contract.rs