84 lines
2.1 KiB
Rust
84 lines
2.1 KiB
Rust
// Application.
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pub mod app;
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mod game_runner;
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use anyhow::Result;
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use app::{App, AppArgs};
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use std::io;
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// see pico-args example at https://github.com/RazrFalcon/pico-args/blob/master/examples/app.rs
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const HELP: &str = "\
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Trictrac CLI
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USAGE:
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trictrac-cli [OPTIONS]
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FLAGS:
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-h, --help Prints help information
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OPTIONS:
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--seed SEED Sets the random generator seed
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--bot STRATEGY_BOT Add a bot player with strategy STRATEGY, a second bot may be added to play against the first : --bot STRATEGY_BOT1,STRATEGY_BOT2
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ARGS:
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<INPUT>
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";
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fn main() -> Result<()> {
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env_logger::init();
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let args = match parse_args() {
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Ok(v) => v,
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Err(e) => {
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eprintln!("Error: {}.", e);
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std::process::exit(1);
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}
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};
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// println!("{:#?}", args);
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// Create an application.
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let mut app = App::new(args);
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// Start the main loop.
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while !app.should_quit {
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println!("whot?>");
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let mut input = String::new();
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let _bytecount = io::stdin().read_line(&mut input)?;
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app.input(input.trim());
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}
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// display app final state
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println!("{}", app.display());
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Ok(())
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}
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fn parse_args() -> Result<AppArgs, pico_args::Error> {
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let mut pargs = pico_args::Arguments::from_env();
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// Help has a higher priority and should be handled separately.
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if pargs.contains(["-h", "--help"]) {
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print!("{}", HELP);
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std::process::exit(0);
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}
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let args = AppArgs {
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// Parses an optional value that implements `FromStr`.
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seed: pargs.opt_value_from_str("--seed")?,
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bot: pargs.opt_value_from_str("--bot")?,
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// Parses an optional value from `&str` using a specified function.
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// width: pargs.opt_value_from_fn("--width", parse_width)?.unwrap_or(10),
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};
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// It's up to the caller what to do with the remaining arguments.
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let remaining = pargs.finish();
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if !remaining.is_empty() {
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eprintln!("Warning: unused arguments left: {:?}.", remaining);
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}
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Ok(args)
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}
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// fn parse_width(s: &str) -> Result<u32, &'static str> {
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// s.parse().map_err(|_| "not a number")
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// }
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