fix: avoid panics on invalid inspect request arguments

[immanuwell]

Overview

nydus-image inspect --request can still panic on bad args. Easy to hit with a typo, pretty meh.

Related Issues

Related #705

Change Details

Parse chunk OFFSET like icheck INODE, return normal errors in request mode, and add regression tests. Tiny fix, keeps valid requests working the same.

Test Results

cargo test -q --bin nydus-image

Repro before:
cargo run -q --bin nydus-image -- inspect tests/texture/bootstrap/rafs-v5.boot --request 'chunk abc'
cargo run -q --bin nydus-image -- inspect tests/texture/bootstrap/rafs-v5.boot --request 'icheck abc'

Before: panic
Now: Error: invalid arguments in inspect request 'chunk abc'
Now: Error: invalid arguments in inspect request 'icheck abc'

Valid request check:
cargo run -q --bin nydus-image -- inspect tests/texture/bootstrap/rafs-v5.boot --request 'stats'

Change Type

• Bug Fix
• Feature Addition
• Documentation Update
• Code Refactoring
• Performance Improvement
• Other (please describe)

Self-Checklist

• I have run a code style check and addressed any warnings/errors.
• I have added appropriate comments to my code (if applicable).
• I have updated the documentation (if applicable).
• I have written appropriate unit tests.