rustyrepl
The easy Rust Read-Evaluate-Print-Loop (REPL) utility crate
About
rustyrepl is a simple crate to facilitate creation of Read, Evaluate, Print, Loop utilities at the command-line.
Purpose
- Capturing exits/quits of the REPL interface
- Storing and managing REPL history commands as well as an index of said commands for you
- Allowing operators to get a help menu at any point, using the full Clap supported help interface (i.e. sub-command help as well)
- Processing the commands as incoming
Usage
First, add rustyrepl to your Cargo.toml file
toml
[dependencies]
rustyrepl = "0.1"
Next:
```rust
use anyhow::Result;
use clap::{Parser, Subcommand};
use rustyrepl::{Repl, ReplCommandProcessor};
/// The enum of sub-commands supported by the CLI
[derive(Subcommand, Clone, Debug)]
pub enum Command {
/// Execute a test command
Test,
}
/// The general CLI, essentially a wrapper for the sub-commands [Commands]
[derive(Parser, Clone, Debug)]
pub struct Cli {
#[clap(subcommand)]
command: Command,
}
[derive(Debug)]
pub struct CliProcessor {}
[asynctrait::asynctrait]
impl ReplCommandProcessor for CliProcessor {
fn isquit(&self, command: &str) -> bool {
matches!(command, "quit" | "exit")
}
async fn processcommand(&self, command: Cli) -> Result<()> {
match command.command {
Command::Test => println!("A wild test appeared!"),
}
Ok(())
}
}
// MAIN //
[tokio::main]
async fn main() -> Result<()> {
let processor: Box> = Box::new(CliProcessor {});
let mut repl = Repl::::new(processor, None, Some(">>".to_string()))?;
repl.process().await
}
```