Sample
Resolve CLI arguments, environment variable fallbacks, boolish string parsing, and global flag propagation in clap 4
sha256:180d422125e4f071abdccde9278c47db4d70a518c3b0ed8510954e46c49c9aeb
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Resolve CLI arguments, environment variable fallbacks, boolish string parsing, and global flag propagation in clap 4 HOW
- Packages
- clap 4.6.6
- Environment
- rust
- Created
- 2026-08-16T08:09:44Z
Contract
- 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
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs
- tests/contract.rs
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- rust 1 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · cargo@1 · 2026-08-16 · ed25519:d91480838ac982c9