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use std::{
fs::{read, write},
path::PathBuf,
process::Command,
};
use clap::Parser;
use tempfile::tempdir;
use roadmap::from_yaml;
fn main() -> anyhow::Result<()> {
let args = Args::parse();
let data = read(&args.filename)?;
let yaml = String::from_utf8(data)?;
let roadmap = from_yaml(&yaml)?;
let graph = roadmap.format_as_dot(args.label_width)?;
let tmp = tempdir()?;
let filename = tmp.path().join("dot");
write(&filename, graph)?;
let output = Command::new("dot").arg("-Tsvg").arg(filename).output()?;
if output.status.success() {
let dot = String::from_utf8(output.stdout)?;
println!("{}", dot);
} else {
let stderr = String::from_utf8_lossy(&output.stderr);
eprintln!("ERROR: dot failed:\n{stderr}");
std::process::exit(output.status.code().unwrap());
}
Ok(())
}
#[derive(Parser)]
struct Args {
/// Width of labels in the graph in characters.
#[clap(short, long, default_value = "20")]
label_width: usize,
/// Input filename.
filename: PathBuf,
}
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