好用的 crates

总会有新的可适用于开发命令行工具程序的 crates 被发布出来。

本书引用到的 crates

anyhow - provides anyhow::Error for easy error handling
assert_cmd - simplifies integration testing of CLIs
assert_fs - Setup input files and test output files
atty - detected whether application is running in a tty
clap-verbosity-flag - adds a --verbose flag to structopt CLIs
clap - command line argument parser
confy - boilerplate-free configuration management
crossbeam-channel - provides multi-producer multi-consumer channels for message passing
ctrlc - easy ctrl-c handler
env_logger - implements a logger configurable via environment variables
exitcode - system exit code constants
human-panic - panic message handler
indicatif - progress bars and spinners
log - provides logging abstracted over implementation
predicates - implements boolean-valued predicate functions
proptest - property testing framework
serde_json - serialize/deserialize to JSON
signal-hook - handles UNIX signals
structopt - parses command line arguments into a struct
tokio - asynchronous runtime
wasm-pack - tool for building WebAssembly

Rust 的 crates 景观是不断变化的，你可以在 lib.rs 查找 crates：以下是一些可能对构建 CLIs 有用的特定的类别：