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|
mod examples;
use {
clap::{CommandFactory, Parser, ValueEnum},
examples::*,
};
static INTRO_TEMPLATE: &str = "
Compute `height x width`
";
static EXAMPLES_TEMPLATE: &str = "
**Examples:**
${examples
**${example-number})** ${example-title}: `${example-cmd}`
${example-comments}
}
";
/// Application launch arguments
#[derive(Parser, Debug)]
#[command(name = "withex", author, version, about, disable_help_flag = true)]
struct Args {
/// Print help
#[arg(long)]
help: bool,
/// Only use ASCII characters
#[arg(long)]
ascii: bool,
/// Height, that is the distance between bottom and top
#[arg(short, long, default_value = "9")]
height: u16,
/// Width, from there, to there, eg `4` or `5`
#[arg(short, long, default_value = "3")]
width: u16,
/// Computation strategy
#[arg(long, default_value = "fast")]
strategy: Strategy,
/// Root Directory
pub root: Option<std::path::PathBuf>,
}
#[derive(ValueEnum, Clone, Copy, Debug)]
enum Strategy {
Fast,
Precise,
}
pub fn print_help() {
let args = Args::parse();
let mut printer = clap_help::Printer::new(Args::command())
.with("introduction", INTRO_TEMPLATE)
.without("author");
if args.ascii {
printer.skin_mut().limit_to_ascii();
}
printer.template_keys_mut().push("examples");
printer.set_template("examples", EXAMPLES_TEMPLATE);
for (i, example) in EXAMPLES.iter().enumerate() {
printer
.expander_mut()
.sub("examples")
.set("example-number", i + 1)
.set("example-title", example.title)
.set("example-cmd", example.cmd)
.set_md("example-comments", example.comments);
}
printer.print_help();
}
fn main() {
let args = Args::parse();
if args.help {
print_help();
return;
}
let (w, h) = (args.width, args.height);
println!("Computation strategy: {:?}", args.strategy);
println!("{w} x {h} = {}", w * h);
}
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