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clap/examples/cargo-example.md
Ed Page c90a4eabae fix(help): Make output more dense 
In looking at other help output, I noticed that they use two spaces, in
place of clap's 4, and it doesn't suffer from legibility.  If it
doesn't make the output worse, let's go ahead and make it as dense so we
fit more content on the screen.

This is a part of #4132
2022-09-07 17:13:55 -05:00

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For more on creating a custom subcommand, see the cargo book. The crate clap-cargo can help in mimicking cargo's interface.

The help looks like:

$ cargo-example --help
Usage: cargo <COMMAND>

Commands:
  example  A simple to use, efficient, and full-featured Command Line Argument Parser
  help     Print this message or the help of the given subcommand(s)

Options:
  -h, --help  Print help information

$ cargo-example example --help
A simple to use, efficient, and full-featured Command Line Argument Parser

Usage: cargo example [OPTIONS]

Options:
      --manifest-path <PATH>  
  -h, --help                  Print help information
  -V, --version               Print version information

Then to directly invoke the command, run:

$ cargo-example example
None

$ cargo-example example --manifest-path Cargo.toml
Some("Cargo.toml")