Hands-On Microservices with Rust

Usage

When you use the clap crate in your application, you can use command-line parameters to tweak it. The clap crate adds a --help argument, which the user can use to print information about all the arguments. This description was generated automatically by the crate, as can be seen in the following example:

$ ./target/debug/random-service-with-args --helprandom-service-with-env 0.1.0Your NameRust MicroserviceUSAGE:    random-service-with-env [OPTIONS]FLAGS:    -h, --help       Prints help information    -V, --version    Prints version informationOPTIONS:    -a, --address <ADDRESS>    Sets an address    -c, --config <FILE>        Sets a custom config file

Our application successfully printed the usage info: it provided us with all flags, options, and usage variants. If ...