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Build A Simple Cli App with Rust

· One min read
forfd8960
forfd8960
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use clap to build a cli App​

So, I want to build a Cli App that convert a csv file to json, yaml, toml formated file.

And for Rust, there is crate clap was used to build cli app.

And the final command to use the cli app, is something like this:

./target/debug/rcli csv -i test.csv

Init the app​

cargo new --bin rcli

Add the dependency​

cargo add clap --features derive

The code structure​

alt text

there are 4 file under the src:

  • lib.rs: expose the opts and process module to let main can use them.
  • opts.rs: define the command line arguments and handle covert to internal data structure.
  • process.rs: read csv file and write to different format file from csv.
  • main.rs: cli app entry.